./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-dist.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec 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/mult-dist.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-dist.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-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:12:06,865 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:12:06,924 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:12:06,927 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:12:06,927 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:12:06,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:12:06,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:12:06,951 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:12:06,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:12:06,951 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:12:06,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:12:06,953 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:12:06,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:12:06,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:12:06,955 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:12:06,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:12:06,956 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:12:06,956 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:12:06,958 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:12:06,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:12:06,958 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:12:06,960 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:12:06,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:12:06,960 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:12:06,961 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:12:06,961 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:12:06,961 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:12:06,961 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:12:06,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:12:06,962 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:12:06,962 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:12:06,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:12:06,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:12:06,964 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:12:06,964 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:12:06,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:12:06,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:12:06,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:12:06,965 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:12:06,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:12:06,966 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:12:06,966 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:12:06,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:12:06,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:12:07,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:12:07,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:12:07,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:12:07,260 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:12:07,261 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:12:07,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-02-07 19:12:08,335 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:12:08,504 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:12:08,505 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-02-07 19:12:08,514 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfac04102/167a22f7fee24bef800c67b11c6e9631/FLAG4b305e859 [2024-02-07 19:12:08,530 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfac04102/167a22f7fee24bef800c67b11c6e9631 [2024-02-07 19:12:08,532 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:12:08,533 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:12:08,534 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-dist.wvr.yml/witness.yml [2024-02-07 19:12:08,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:12:08,593 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:12:08,594 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:12:08,594 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:12:08,598 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:12:08,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:12:08" (1/2) ... [2024-02-07 19:12:08,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18af1c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:08, skipping insertion in model container [2024-02-07 19:12:08,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:12:08" (1/2) ... [2024-02-07 19:12:08,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3873b0e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:08, skipping insertion in model container [2024-02-07 19:12:08,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:12:08" (2/2) ... [2024-02-07 19:12:08,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18af1c3e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08, skipping insertion in model container [2024-02-07 19:12:08,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:12:08" (2/2) ... [2024-02-07 19:12:08,602 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:12:08,615 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:12:08,615 INFO L76 edCorrectnessWitness]: Location invariant before [L68-L68] ((((0LL - (long long )a) + (long long )b >= 0LL) && ((long long )a + (long long )b >= 0LL)) && ((0LL - (long long )a) - (long long )b >= 0LL)) && ((long long )a - (long long )b >= 0LL) [2024-02-07 19:12:08,631 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:12:08,782 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/mult-dist.wvr.c[2155,2168] [2024-02-07 19:12:08,787 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:12:08,795 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 19:12:08,859 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/mult-dist.wvr.c[2155,2168] [2024-02-07 19:12:08,861 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:12:08,873 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:12:08,873 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08 WrapperNode [2024-02-07 19:12:08,873 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:12:08,874 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:12:08,874 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:12:08,875 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:12:08,879 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 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,891 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 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,914 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2024-02-07 19:12:08,914 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:12:08,915 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:12:08,915 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:12:08,915 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:12:08,923 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,924 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,931 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,951 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-02-07 19:12:08,951 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,952 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,960 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,962 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,963 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,964 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,966 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:12:08,966 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:12:08,966 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:12:08,966 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:12:08,967 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (1/1) ... [2024-02-07 19:12:08,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:12:08,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:09,027 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) [2024-02-07 19:12:09,039 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 [2024-02-07 19:12:09,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:12:09,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:12:09,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:12:09,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:12:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:12:09,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 19:12:09,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 19:12:09,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:12:09,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:12:09,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:12:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:12:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:12:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:12:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:12:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:12:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:12:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:12:09,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:12:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:12:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:12:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:12:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:12:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:12:09,084 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:12:09,166 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:12:09,169 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:12:09,331 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:12:09,331 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:12:09,463 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:12:09,463 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-07 19:12:09,463 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:12:09 BoogieIcfgContainer [2024-02-07 19:12:09,464 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:12:09,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:12:09,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:12:09,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:12:09,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:12:08" (1/4) ... [2024-02-07 19:12:09,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ad4f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:12:09, skipping insertion in model container [2024-02-07 19:12:09,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:12:08" (2/4) ... [2024-02-07 19:12:09,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ad4f81 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:12:09, skipping insertion in model container [2024-02-07 19:12:09,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:08" (3/4) ... [2024-02-07 19:12:09,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ad4f81 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:12:09, skipping insertion in model container [2024-02-07 19:12:09,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:12:09" (4/4) ... [2024-02-07 19:12:09,470 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2024-02-07 19:12:09,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:12:09,483 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 19:12:09,483 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:12:09,520 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-07 19:12:09,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 79 flow [2024-02-07 19:12:09,583 INFO L124 PetriNetUnfolderBase]: 3/26 cut-off events. [2024-02-07 19:12:09,585 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-07 19:12:09,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 26 events. 3/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-02-07 19:12:09,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 79 flow [2024-02-07 19:12:09,592 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 25 transitions, 68 flow [2024-02-07 19:12:09,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:12:09,612 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;@f5b505f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:12:09,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-07 19:12:09,617 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:12:09,617 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 19:12:09,618 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:12:09,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:09,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 19:12:09,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:09,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash 9002, now seen corresponding path program 1 times [2024-02-07 19:12:09,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:09,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983589341] [2024-02-07 19:12:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:09,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:09,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:09,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983589341] [2024-02-07 19:12:09,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983589341] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:09,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:09,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:12:09,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390634510] [2024-02-07 19:12:09,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:09,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:12:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:12:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:12:10,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:12:10,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-02-07 19:12:10,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:10,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:12:10,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:10,093 INFO L124 PetriNetUnfolderBase]: 220/327 cut-off events. [2024-02-07 19:12:10,093 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-02-07 19:12:10,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 327 events. 220/327 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 772 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 326 conditions per place. [2024-02-07 19:12:10,097 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-02-07 19:12:10,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 112 flow [2024-02-07 19:12:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:12:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:12:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2024-02-07 19:12:10,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-02-07 19:12:10,107 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 3 states and 36 transitions. [2024-02-07 19:12:10,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 112 flow [2024-02-07 19:12:10,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 19:12:10,111 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 58 flow [2024-02-07 19:12:10,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-02-07 19:12:10,115 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2024-02-07 19:12:10,115 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 58 flow [2024-02-07 19:12:10,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2024-02-07 19:12:10,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:10,116 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] [2024-02-07 19:12:10,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:12:10,116 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:10,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:10,117 INFO L85 PathProgramCache]: Analyzing trace with hash 685527005, now seen corresponding path program 1 times [2024-02-07 19:12:10,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:10,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899489520] [2024-02-07 19:12:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:10,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:10,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:10,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899489520] [2024-02-07 19:12:10,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899489520] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:10,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:10,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:12:10,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100168354] [2024-02-07 19:12:10,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:10,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:12:10,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:10,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:12:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:12:10,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:10,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-02-07 19:12:10,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:10,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:10,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:10,432 INFO L124 PetriNetUnfolderBase]: 428/632 cut-off events. [2024-02-07 19:12:10,432 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-07 19:12:10,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 632 events. 428/632 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2001 event pairs, 138 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 1282. Up to 389 conditions per place. [2024-02-07 19:12:10,436 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 37 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2024-02-07 19:12:10,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 43 transitions, 185 flow [2024-02-07 19:12:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:12:10,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:12:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-02-07 19:12:10,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-02-07 19:12:10,437 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 58 flow. Second operand 3 states and 58 transitions. [2024-02-07 19:12:10,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 43 transitions, 185 flow [2024-02-07 19:12:10,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:10,439 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 80 flow [2024-02-07 19:12:10,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2024-02-07 19:12:10,440 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -4 predicate places. [2024-02-07 19:12:10,440 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 80 flow [2024-02-07 19:12:10,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-02-07 19:12:10,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:10,441 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] [2024-02-07 19:12:10,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:12:10,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:10,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:10,442 INFO L85 PathProgramCache]: Analyzing trace with hash 956414599, now seen corresponding path program 1 times [2024-02-07 19:12:10,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:10,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005684280] [2024-02-07 19:12:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:10,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:10,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:10,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005684280] [2024-02-07 19:12:10,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005684280] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:10,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:10,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:10,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814775334] [2024-02-07 19:12:10,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:10,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:10,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:10,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:10,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:10,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:10,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:10,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:10,856 INFO L124 PetriNetUnfolderBase]: 586/838 cut-off events. [2024-02-07 19:12:10,856 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-02-07 19:12:10,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2068 conditions, 838 events. 586/838 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2735 event pairs, 231 based on Foata normal form. 2/840 useless extension candidates. Maximal degree in co-relation 599. Up to 621 conditions per place. [2024-02-07 19:12:10,860 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 50 selfloop transitions, 18 changer transitions 3/72 dead transitions. [2024-02-07 19:12:10,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 72 transitions, 359 flow [2024-02-07 19:12:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-02-07 19:12:10,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47783251231527096 [2024-02-07 19:12:10,862 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 80 flow. Second operand 7 states and 97 transitions. [2024-02-07 19:12:10,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 72 transitions, 359 flow [2024-02-07 19:12:10,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 72 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:10,864 INFO L231 Difference]: Finished difference. Result has 37 places, 43 transitions, 204 flow [2024-02-07 19:12:10,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=37, PETRI_TRANSITIONS=43} [2024-02-07 19:12:10,865 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2024-02-07 19:12:10,865 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 43 transitions, 204 flow [2024-02-07 19:12:10,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:10,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:10,866 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] [2024-02-07 19:12:10,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:12:10,866 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:10,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:10,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1336056039, now seen corresponding path program 2 times [2024-02-07 19:12:10,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:10,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083769519] [2024-02-07 19:12:10,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:10,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:11,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083769519] [2024-02-07 19:12:11,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083769519] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492685836] [2024-02-07 19:12:11,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:12:11,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:11,075 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) [2024-02-07 19:12:11,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:12:11,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:11,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:11,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-07 19:12:11,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:11,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:11,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492685836] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:11,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:11,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 12 [2024-02-07 19:12:11,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395100268] [2024-02-07 19:12:11,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:11,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:11,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:11,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:11,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:12:11,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:11,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 43 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:11,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:11,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:11,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:12,063 INFO L124 PetriNetUnfolderBase]: 953/1384 cut-off events. [2024-02-07 19:12:12,063 INFO L125 PetriNetUnfolderBase]: For 1340/1340 co-relation queries the response was YES. [2024-02-07 19:12:12,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4404 conditions, 1384 events. 953/1384 cut-off events. For 1340/1340 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5154 event pairs, 257 based on Foata normal form. 8/1392 useless extension candidates. Maximal degree in co-relation 2478. Up to 505 conditions per place. [2024-02-07 19:12:12,072 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 103 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-02-07 19:12:12,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 125 transitions, 752 flow [2024-02-07 19:12:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:12:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:12:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-02-07 19:12:12,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-02-07 19:12:12,074 INFO L175 Difference]: Start difference. First operand has 37 places, 43 transitions, 204 flow. Second operand 8 states and 144 transitions. [2024-02-07 19:12:12,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 125 transitions, 752 flow [2024-02-07 19:12:12,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 125 transitions, 730 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-02-07 19:12:12,079 INFO L231 Difference]: Finished difference. Result has 48 places, 57 transitions, 337 flow [2024-02-07 19:12:12,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=48, PETRI_TRANSITIONS=57} [2024-02-07 19:12:12,079 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2024-02-07 19:12:12,080 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 57 transitions, 337 flow [2024-02-07 19:12:12,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:12,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:12,080 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] [2024-02-07 19:12:12,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 19:12:12,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:12,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:12,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:12,293 INFO L85 PathProgramCache]: Analyzing trace with hash 962183387, now seen corresponding path program 3 times [2024-02-07 19:12:12,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:12,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124098922] [2024-02-07 19:12:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:12,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:12,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:12,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124098922] [2024-02-07 19:12:12,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124098922] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:12,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:12,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:12,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765598648] [2024-02-07 19:12:12,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:12,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:12,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:12,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:12,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:12,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 57 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:12,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:12,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:12,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:12,790 INFO L124 PetriNetUnfolderBase]: 1156/1653 cut-off events. [2024-02-07 19:12:12,791 INFO L125 PetriNetUnfolderBase]: For 4329/4329 co-relation queries the response was YES. [2024-02-07 19:12:12,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6595 conditions, 1653 events. 1156/1653 cut-off events. For 4329/4329 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6212 event pairs, 423 based on Foata normal form. 2/1655 useless extension candidates. Maximal degree in co-relation 4249. Up to 1231 conditions per place. [2024-02-07 19:12:12,802 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 71 selfloop transitions, 28 changer transitions 3/103 dead transitions. [2024-02-07 19:12:12,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 103 transitions, 794 flow [2024-02-07 19:12:12,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-02-07 19:12:12,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47783251231527096 [2024-02-07 19:12:12,804 INFO L175 Difference]: Start difference. First operand has 48 places, 57 transitions, 337 flow. Second operand 7 states and 97 transitions. [2024-02-07 19:12:12,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 103 transitions, 794 flow [2024-02-07 19:12:12,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 103 transitions, 774 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-02-07 19:12:12,818 INFO L231 Difference]: Finished difference. Result has 57 places, 73 transitions, 535 flow [2024-02-07 19:12:12,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=535, PETRI_PLACES=57, PETRI_TRANSITIONS=73} [2024-02-07 19:12:12,818 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2024-02-07 19:12:12,819 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 73 transitions, 535 flow [2024-02-07 19:12:12,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:12,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:12,819 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] [2024-02-07 19:12:12,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:12:12,819 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:12,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:12,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1157146829, now seen corresponding path program 4 times [2024-02-07 19:12:12,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:12,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824582250] [2024-02-07 19:12:12,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:12,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:12,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824582250] [2024-02-07 19:12:12,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824582250] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387435842] [2024-02-07 19:12:12,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:12:12,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:12,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:12,953 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) [2024-02-07 19:12:12,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:12:13,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:12:13,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:13,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:12:13,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:13,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387435842] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:13,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:13,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 19:12:13,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267093099] [2024-02-07 19:12:13,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:13,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:12:13,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:12:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:13,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:12:13,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 73 transitions, 535 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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) [2024-02-07 19:12:13,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:13,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:12:13,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:13,945 INFO L124 PetriNetUnfolderBase]: 1327/1981 cut-off events. [2024-02-07 19:12:13,945 INFO L125 PetriNetUnfolderBase]: For 7373/7373 co-relation queries the response was YES. [2024-02-07 19:12:13,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8791 conditions, 1981 events. 1327/1981 cut-off events. For 7373/7373 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8431 event pairs, 234 based on Foata normal form. 12/1993 useless extension candidates. Maximal degree in co-relation 5521. Up to 652 conditions per place. [2024-02-07 19:12:13,960 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 121 selfloop transitions, 52 changer transitions 0/174 dead transitions. [2024-02-07 19:12:13,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 174 transitions, 1427 flow [2024-02-07 19:12:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:12:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:12:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 157 transitions. [2024-02-07 19:12:13,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49216300940438873 [2024-02-07 19:12:13,962 INFO L175 Difference]: Start difference. First operand has 57 places, 73 transitions, 535 flow. Second operand 11 states and 157 transitions. [2024-02-07 19:12:13,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 174 transitions, 1427 flow [2024-02-07 19:12:13,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 174 transitions, 1365 flow, removed 31 selfloop flow, removed 0 redundant places. [2024-02-07 19:12:13,994 INFO L231 Difference]: Finished difference. Result has 71 places, 97 transitions, 870 flow [2024-02-07 19:12:13,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=870, PETRI_PLACES=71, PETRI_TRANSITIONS=97} [2024-02-07 19:12:13,995 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2024-02-07 19:12:13,995 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 97 transitions, 870 flow [2024-02-07 19:12:13,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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) [2024-02-07 19:12:13,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:13,996 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] [2024-02-07 19:12:14,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:14,208 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,SelfDestructingSolverStorable5 [2024-02-07 19:12:14,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:14,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1533522907, now seen corresponding path program 5 times [2024-02-07 19:12:14,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:14,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168967092] [2024-02-07 19:12:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:14,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:14,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:14,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168967092] [2024-02-07 19:12:14,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168967092] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:14,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528979593] [2024-02-07 19:12:14,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:12:14,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:14,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:14,331 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) [2024-02-07 19:12:14,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 19:12:14,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:14,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:14,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:12:14,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:14,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:14,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528979593] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:14,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:14,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 10 [2024-02-07 19:12:14,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067190309] [2024-02-07 19:12:14,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:14,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:14,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-02-07 19:12:14,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:14,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 97 transitions, 870 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:14,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:14,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:14,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:15,031 INFO L124 PetriNetUnfolderBase]: 1567/2353 cut-off events. [2024-02-07 19:12:15,032 INFO L125 PetriNetUnfolderBase]: For 12011/12011 co-relation queries the response was YES. [2024-02-07 19:12:15,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11221 conditions, 2353 events. 1567/2353 cut-off events. For 12011/12011 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10412 event pairs, 285 based on Foata normal form. 6/2359 useless extension candidates. Maximal degree in co-relation 9197. Up to 790 conditions per place. [2024-02-07 19:12:15,058 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 139 selfloop transitions, 49 changer transitions 0/189 dead transitions. [2024-02-07 19:12:15,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 189 transitions, 1834 flow [2024-02-07 19:12:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:12:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:12:15,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-02-07 19:12:15,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6293103448275862 [2024-02-07 19:12:15,059 INFO L175 Difference]: Start difference. First operand has 71 places, 97 transitions, 870 flow. Second operand 8 states and 146 transitions. [2024-02-07 19:12:15,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 189 transitions, 1834 flow [2024-02-07 19:12:15,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 189 transitions, 1796 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:15,094 INFO L231 Difference]: Finished difference. Result has 82 places, 117 transitions, 1255 flow [2024-02-07 19:12:15,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1255, PETRI_PLACES=82, PETRI_TRANSITIONS=117} [2024-02-07 19:12:15,094 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 50 predicate places. [2024-02-07 19:12:15,095 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 117 transitions, 1255 flow [2024-02-07 19:12:15,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:15,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:15,095 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] [2024-02-07 19:12:15,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:15,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:15,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:15,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1094455029, now seen corresponding path program 6 times [2024-02-07 19:12:15,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:15,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946113021] [2024-02-07 19:12:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:15,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:15,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:15,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946113021] [2024-02-07 19:12:15,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946113021] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:15,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145792917] [2024-02-07 19:12:15,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:12:15,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:15,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:15,488 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) [2024-02-07 19:12:15,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 19:12:15,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 19:12:15,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:15,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-07 19:12:15,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:15,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:15,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145792917] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:15,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:15,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 13 [2024-02-07 19:12:15,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938859182] [2024-02-07 19:12:15,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:15,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:15,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:15,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:15,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:15,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:15,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 117 transitions, 1255 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:15,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:15,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:15,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:16,264 INFO L124 PetriNetUnfolderBase]: 2079/3192 cut-off events. [2024-02-07 19:12:16,264 INFO L125 PetriNetUnfolderBase]: For 24069/24069 co-relation queries the response was YES. [2024-02-07 19:12:16,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16960 conditions, 3192 events. 2079/3192 cut-off events. For 24069/24069 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15546 event pairs, 414 based on Foata normal form. 6/3198 useless extension candidates. Maximal degree in co-relation 16038. Up to 1491 conditions per place. [2024-02-07 19:12:16,302 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 161 selfloop transitions, 106 changer transitions 3/271 dead transitions. [2024-02-07 19:12:16,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 271 transitions, 3319 flow [2024-02-07 19:12:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:16,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-02-07 19:12:16,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960591133004927 [2024-02-07 19:12:16,304 INFO L175 Difference]: Start difference. First operand has 82 places, 117 transitions, 1255 flow. Second operand 7 states and 121 transitions. [2024-02-07 19:12:16,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 271 transitions, 3319 flow [2024-02-07 19:12:16,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 271 transitions, 3251 flow, removed 34 selfloop flow, removed 0 redundant places. [2024-02-07 19:12:16,374 INFO L231 Difference]: Finished difference. Result has 93 places, 201 transitions, 2676 flow [2024-02-07 19:12:16,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2676, PETRI_PLACES=93, PETRI_TRANSITIONS=201} [2024-02-07 19:12:16,375 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 61 predicate places. [2024-02-07 19:12:16,375 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 201 transitions, 2676 flow [2024-02-07 19:12:16,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:16,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:16,375 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] [2024-02-07 19:12:16,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:16,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:16,590 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:16,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:16,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1345766047, now seen corresponding path program 7 times [2024-02-07 19:12:16,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:16,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137915881] [2024-02-07 19:12:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:16,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137915881] [2024-02-07 19:12:16,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137915881] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:16,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724053427] [2024-02-07 19:12:16,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:12:16,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:16,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:16,729 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) [2024-02-07 19:12:16,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 19:12:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:16,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 19:12:16,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:16,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:17,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724053427] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:17,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:17,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 12 [2024-02-07 19:12:17,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546831738] [2024-02-07 19:12:17,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:17,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:17,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:17,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:17,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:12:17,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:17,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 201 transitions, 2676 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:17,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:17,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:17,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:17,521 INFO L124 PetriNetUnfolderBase]: 2139/3284 cut-off events. [2024-02-07 19:12:17,521 INFO L125 PetriNetUnfolderBase]: For 33933/33933 co-relation queries the response was YES. [2024-02-07 19:12:17,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20017 conditions, 3284 events. 2139/3284 cut-off events. For 33933/33933 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16059 event pairs, 493 based on Foata normal form. 22/3306 useless extension candidates. Maximal degree in co-relation 18459. Up to 1855 conditions per place. [2024-02-07 19:12:17,551 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 201 selfloop transitions, 56 changer transitions 0/258 dead transitions. [2024-02-07 19:12:17,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 258 transitions, 3667 flow [2024-02-07 19:12:17,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:12:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:12:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-02-07 19:12:17,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-02-07 19:12:17,553 INFO L175 Difference]: Start difference. First operand has 93 places, 201 transitions, 2676 flow. Second operand 6 states and 102 transitions. [2024-02-07 19:12:17,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 258 transitions, 3667 flow [2024-02-07 19:12:17,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 258 transitions, 3569 flow, removed 49 selfloop flow, removed 0 redundant places. [2024-02-07 19:12:17,631 INFO L231 Difference]: Finished difference. Result has 101 places, 213 transitions, 2957 flow [2024-02-07 19:12:17,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2957, PETRI_PLACES=101, PETRI_TRANSITIONS=213} [2024-02-07 19:12:17,632 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 69 predicate places. [2024-02-07 19:12:17,632 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 213 transitions, 2957 flow [2024-02-07 19:12:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:17,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:17,633 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] [2024-02-07 19:12:17,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:17,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:17,845 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:17,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:17,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1531435160, now seen corresponding path program 1 times [2024-02-07 19:12:17,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:17,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013906164] [2024-02-07 19:12:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:17,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:17,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:17,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013906164] [2024-02-07 19:12:17,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013906164] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:17,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070723488] [2024-02-07 19:12:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:17,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:17,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:17,966 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) [2024-02-07 19:12:18,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 19:12:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:18,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 19:12:18,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:18,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:18,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070723488] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:18,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:18,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 19:12:18,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675074662] [2024-02-07 19:12:18,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:18,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:12:18,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:18,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:12:18,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:18,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:12:18,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 213 transitions, 2957 flow. Second operand has 13 states, 13 states have (on average 6.923076923076923) internal successors, (90), 13 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) [2024-02-07 19:12:18,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:18,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:12:18,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:19,341 INFO L124 PetriNetUnfolderBase]: 2326/3577 cut-off events. [2024-02-07 19:12:19,342 INFO L125 PetriNetUnfolderBase]: For 36449/36449 co-relation queries the response was YES. [2024-02-07 19:12:19,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21622 conditions, 3577 events. 2326/3577 cut-off events. For 36449/36449 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17942 event pairs, 534 based on Foata normal form. 18/3595 useless extension candidates. Maximal degree in co-relation 20376. Up to 1738 conditions per place. [2024-02-07 19:12:19,363 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 186 selfloop transitions, 148 changer transitions 0/335 dead transitions. [2024-02-07 19:12:19,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 335 transitions, 4594 flow [2024-02-07 19:12:19,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:12:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:12:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-02-07 19:12:19,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047021943573667 [2024-02-07 19:12:19,365 INFO L175 Difference]: Start difference. First operand has 101 places, 213 transitions, 2957 flow. Second operand 11 states and 161 transitions. [2024-02-07 19:12:19,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 335 transitions, 4594 flow [2024-02-07 19:12:19,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 335 transitions, 4484 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:19,458 INFO L231 Difference]: Finished difference. Result has 116 places, 252 transitions, 3830 flow [2024-02-07 19:12:19,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3830, PETRI_PLACES=116, PETRI_TRANSITIONS=252} [2024-02-07 19:12:19,460 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 84 predicate places. [2024-02-07 19:12:19,460 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 252 transitions, 3830 flow [2024-02-07 19:12:19,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.923076923076923) internal successors, (90), 13 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) [2024-02-07 19:12:19,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:19,460 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] [2024-02-07 19:12:19,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:19,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:19,673 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:19,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1637991449, now seen corresponding path program 8 times [2024-02-07 19:12:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:19,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770025638] [2024-02-07 19:12:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:19,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:19,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770025638] [2024-02-07 19:12:19,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770025638] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:19,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826579011] [2024-02-07 19:12:19,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:12:19,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:19,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:19,844 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) [2024-02-07 19:12:19,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 19:12:19,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:19,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:19,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 19:12:19,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:20,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:20,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826579011] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:20,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:20,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 12 [2024-02-07 19:12:20,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501734679] [2024-02-07 19:12:20,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:20,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:12:20,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:20,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 252 transitions, 3830 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:20,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:20,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:20,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:20,741 INFO L124 PetriNetUnfolderBase]: 2302/3542 cut-off events. [2024-02-07 19:12:20,742 INFO L125 PetriNetUnfolderBase]: For 39936/39936 co-relation queries the response was YES. [2024-02-07 19:12:20,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22502 conditions, 3542 events. 2302/3542 cut-off events. For 39936/39936 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17790 event pairs, 520 based on Foata normal form. 22/3564 useless extension candidates. Maximal degree in co-relation 21839. Up to 1826 conditions per place. [2024-02-07 19:12:20,765 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 228 selfloop transitions, 70 changer transitions 0/299 dead transitions. [2024-02-07 19:12:20,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 299 transitions, 4738 flow [2024-02-07 19:12:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:12:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:12:20,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-02-07 19:12:20,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-02-07 19:12:20,767 INFO L175 Difference]: Start difference. First operand has 116 places, 252 transitions, 3830 flow. Second operand 6 states and 102 transitions. [2024-02-07 19:12:20,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 299 transitions, 4738 flow [2024-02-07 19:12:20,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 299 transitions, 4698 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:20,870 INFO L231 Difference]: Finished difference. Result has 122 places, 256 transitions, 4052 flow [2024-02-07 19:12:20,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4052, PETRI_PLACES=122, PETRI_TRANSITIONS=256} [2024-02-07 19:12:20,871 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2024-02-07 19:12:20,871 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 256 transitions, 4052 flow [2024-02-07 19:12:20,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:20,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:20,871 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] [2024-02-07 19:12:20,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:21,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:21,083 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:21,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1170175860, now seen corresponding path program 2 times [2024-02-07 19:12:21,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:21,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885107063] [2024-02-07 19:12:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:21,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:21,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:21,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885107063] [2024-02-07 19:12:21,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885107063] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:21,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:21,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:21,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154524053] [2024-02-07 19:12:21,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:21,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:21,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:21,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:21,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:21,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:21,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 256 transitions, 4052 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:21,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:21,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:21,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:21,820 INFO L124 PetriNetUnfolderBase]: 2320/3568 cut-off events. [2024-02-07 19:12:21,820 INFO L125 PetriNetUnfolderBase]: For 43342/43342 co-relation queries the response was YES. [2024-02-07 19:12:21,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23308 conditions, 3568 events. 2320/3568 cut-off events. For 43342/43342 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17907 event pairs, 658 based on Foata normal form. 4/3572 useless extension candidates. Maximal degree in co-relation 22904. Up to 2330 conditions per place. [2024-02-07 19:12:21,849 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 230 selfloop transitions, 75 changer transitions 5/311 dead transitions. [2024-02-07 19:12:21,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 311 transitions, 5066 flow [2024-02-07 19:12:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-02-07 19:12:21,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541871921182266 [2024-02-07 19:12:21,850 INFO L175 Difference]: Start difference. First operand has 122 places, 256 transitions, 4052 flow. Second operand 7 states and 110 transitions. [2024-02-07 19:12:21,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 311 transitions, 5066 flow [2024-02-07 19:12:21,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 311 transitions, 4936 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:21,964 INFO L231 Difference]: Finished difference. Result has 128 places, 260 transitions, 4154 flow [2024-02-07 19:12:21,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4154, PETRI_PLACES=128, PETRI_TRANSITIONS=260} [2024-02-07 19:12:21,966 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 96 predicate places. [2024-02-07 19:12:21,966 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 260 transitions, 4154 flow [2024-02-07 19:12:21,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:21,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:21,966 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] [2024-02-07 19:12:21,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 19:12:21,967 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:21,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:21,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1628872745, now seen corresponding path program 1 times [2024-02-07 19:12:21,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:21,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013473366] [2024-02-07 19:12:21,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:21,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:22,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:22,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013473366] [2024-02-07 19:12:22,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013473366] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:22,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:22,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:22,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045439565] [2024-02-07 19:12:22,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:22,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:22,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:22,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:22,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:22,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 260 transitions, 4154 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:22,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:22,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:22,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:22,896 INFO L124 PetriNetUnfolderBase]: 2331/3615 cut-off events. [2024-02-07 19:12:22,896 INFO L125 PetriNetUnfolderBase]: For 44659/44659 co-relation queries the response was YES. [2024-02-07 19:12:22,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23551 conditions, 3615 events. 2331/3615 cut-off events. For 44659/44659 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18518 event pairs, 662 based on Foata normal form. 18/3633 useless extension candidates. Maximal degree in co-relation 23129. Up to 2330 conditions per place. [2024-02-07 19:12:22,939 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 229 selfloop transitions, 71 changer transitions 19/320 dead transitions. [2024-02-07 19:12:22,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 320 transitions, 5184 flow [2024-02-07 19:12:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-02-07 19:12:22,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-02-07 19:12:22,940 INFO L175 Difference]: Start difference. First operand has 128 places, 260 transitions, 4154 flow. Second operand 7 states and 116 transitions. [2024-02-07 19:12:22,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 320 transitions, 5184 flow [2024-02-07 19:12:23,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 320 transitions, 5031 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-02-07 19:12:23,075 INFO L231 Difference]: Finished difference. Result has 132 places, 258 transitions, 4127 flow [2024-02-07 19:12:23,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4127, PETRI_PLACES=132, PETRI_TRANSITIONS=258} [2024-02-07 19:12:23,076 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 100 predicate places. [2024-02-07 19:12:23,076 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 258 transitions, 4127 flow [2024-02-07 19:12:23,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:23,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:23,076 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] [2024-02-07 19:12:23,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 19:12:23,077 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:23,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:23,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1427872605, now seen corresponding path program 9 times [2024-02-07 19:12:23,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:23,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334198001] [2024-02-07 19:12:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:23,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:23,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:23,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334198001] [2024-02-07 19:12:23,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334198001] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:23,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695368118] [2024-02-07 19:12:23,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:12:23,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:23,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:23,196 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:23,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 19:12:23,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 19:12:23,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:23,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:12:23,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:23,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:23,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695368118] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:23,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:23,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 11 [2024-02-07 19:12:23,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575832737] [2024-02-07 19:12:23,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:23,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:23,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:23,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:23,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:12:23,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:23,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 258 transitions, 4127 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:23,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:23,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:23,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:23,984 INFO L124 PetriNetUnfolderBase]: 2306/3566 cut-off events. [2024-02-07 19:12:23,984 INFO L125 PetriNetUnfolderBase]: For 44056/44056 co-relation queries the response was YES. [2024-02-07 19:12:23,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23405 conditions, 3566 events. 2306/3566 cut-off events. For 44056/44056 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18066 event pairs, 539 based on Foata normal form. 16/3582 useless extension candidates. Maximal degree in co-relation 22981. Up to 1910 conditions per place. [2024-02-07 19:12:24,010 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 245 selfloop transitions, 57 changer transitions 0/303 dead transitions. [2024-02-07 19:12:24,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 303 transitions, 5047 flow [2024-02-07 19:12:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:12:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:12:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-02-07 19:12:24,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-02-07 19:12:24,012 INFO L175 Difference]: Start difference. First operand has 132 places, 258 transitions, 4127 flow. Second operand 6 states and 100 transitions. [2024-02-07 19:12:24,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 303 transitions, 5047 flow [2024-02-07 19:12:24,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 303 transitions, 4893 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-02-07 19:12:24,130 INFO L231 Difference]: Finished difference. Result has 130 places, 261 transitions, 4148 flow [2024-02-07 19:12:24,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3977, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4148, PETRI_PLACES=130, PETRI_TRANSITIONS=261} [2024-02-07 19:12:24,131 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 98 predicate places. [2024-02-07 19:12:24,132 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 261 transitions, 4148 flow [2024-02-07 19:12:24,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:24,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:24,132 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] [2024-02-07 19:12:24,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:24,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-07 19:12:24,343 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:24,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1164828208, now seen corresponding path program 3 times [2024-02-07 19:12:24,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:24,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355755338] [2024-02-07 19:12:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:24,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:24,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355755338] [2024-02-07 19:12:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355755338] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:24,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:24,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:24,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904742814] [2024-02-07 19:12:24,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:24,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:24,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:24,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:24,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 261 transitions, 4148 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:24,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:24,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:24,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:25,134 INFO L124 PetriNetUnfolderBase]: 2305/3569 cut-off events. [2024-02-07 19:12:25,134 INFO L125 PetriNetUnfolderBase]: For 45064/45064 co-relation queries the response was YES. [2024-02-07 19:12:25,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23372 conditions, 3569 events. 2305/3569 cut-off events. For 45064/45064 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18128 event pairs, 651 based on Foata normal form. 4/3573 useless extension candidates. Maximal degree in co-relation 23249. Up to 2365 conditions per place. [2024-02-07 19:12:25,170 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 228 selfloop transitions, 80 changer transitions 4/313 dead transitions. [2024-02-07 19:12:25,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 313 transitions, 5124 flow [2024-02-07 19:12:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-02-07 19:12:25,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320197044334976 [2024-02-07 19:12:25,172 INFO L175 Difference]: Start difference. First operand has 130 places, 261 transitions, 4148 flow. Second operand 7 states and 108 transitions. [2024-02-07 19:12:25,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 313 transitions, 5124 flow [2024-02-07 19:12:25,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 313 transitions, 5000 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-02-07 19:12:25,281 INFO L231 Difference]: Finished difference. Result has 135 places, 266 transitions, 4331 flow [2024-02-07 19:12:25,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4331, PETRI_PLACES=135, PETRI_TRANSITIONS=266} [2024-02-07 19:12:25,282 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2024-02-07 19:12:25,282 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 266 transitions, 4331 flow [2024-02-07 19:12:25,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:25,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:25,282 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] [2024-02-07 19:12:25,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 19:12:25,283 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:25,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:25,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1238623860, now seen corresponding path program 4 times [2024-02-07 19:12:25,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:25,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481920167] [2024-02-07 19:12:25,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:25,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:25,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:25,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481920167] [2024-02-07 19:12:25,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481920167] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:25,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:25,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:25,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2862173] [2024-02-07 19:12:25,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:25,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:25,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:25,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:25,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 266 transitions, 4331 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:25,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:25,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:25,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:26,072 INFO L124 PetriNetUnfolderBase]: 2298/3584 cut-off events. [2024-02-07 19:12:26,072 INFO L125 PetriNetUnfolderBase]: For 45529/45529 co-relation queries the response was YES. [2024-02-07 19:12:26,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23559 conditions, 3584 events. 2298/3584 cut-off events. For 45529/45529 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18456 event pairs, 637 based on Foata normal form. 16/3600 useless extension candidates. Maximal degree in co-relation 23505. Up to 2365 conditions per place. [2024-02-07 19:12:26,100 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 233 selfloop transitions, 77 changer transitions 6/317 dead transitions. [2024-02-07 19:12:26,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 317 transitions, 5244 flow [2024-02-07 19:12:26,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-02-07 19:12:26,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-02-07 19:12:26,101 INFO L175 Difference]: Start difference. First operand has 135 places, 266 transitions, 4331 flow. Second operand 7 states and 112 transitions. [2024-02-07 19:12:26,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 317 transitions, 5244 flow [2024-02-07 19:12:26,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 317 transitions, 5099 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:26,280 INFO L231 Difference]: Finished difference. Result has 139 places, 263 transitions, 4299 flow [2024-02-07 19:12:26,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4148, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4299, PETRI_PLACES=139, PETRI_TRANSITIONS=263} [2024-02-07 19:12:26,281 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 107 predicate places. [2024-02-07 19:12:26,281 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 263 transitions, 4299 flow [2024-02-07 19:12:26,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:26,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:26,282 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] [2024-02-07 19:12:26,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-07 19:12:26,282 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:26,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:26,282 INFO L85 PathProgramCache]: Analyzing trace with hash 458213785, now seen corresponding path program 10 times [2024-02-07 19:12:26,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:26,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275932522] [2024-02-07 19:12:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:26,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:26,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:26,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275932522] [2024-02-07 19:12:26,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275932522] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:26,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670955957] [2024-02-07 19:12:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:12:26,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:26,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:26,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:26,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 19:12:26,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:12:26,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:26,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:12:26,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:26,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:26,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670955957] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:26,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:26,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 11 [2024-02-07 19:12:26,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135109683] [2024-02-07 19:12:26,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:26,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:26,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:26,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:26,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:12:26,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:26,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 263 transitions, 4299 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:26,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:26,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:26,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:27,205 INFO L124 PetriNetUnfolderBase]: 2259/3484 cut-off events. [2024-02-07 19:12:27,205 INFO L125 PetriNetUnfolderBase]: For 44299/44299 co-relation queries the response was YES. [2024-02-07 19:12:27,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23198 conditions, 3484 events. 2259/3484 cut-off events. For 44299/44299 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17531 event pairs, 521 based on Foata normal form. 16/3500 useless extension candidates. Maximal degree in co-relation 23143. Up to 1773 conditions per place. [2024-02-07 19:12:27,231 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 231 selfloop transitions, 73 changer transitions 0/305 dead transitions. [2024-02-07 19:12:27,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 305 transitions, 5163 flow [2024-02-07 19:12:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:12:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:12:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-02-07 19:12:27,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-02-07 19:12:27,233 INFO L175 Difference]: Start difference. First operand has 139 places, 263 transitions, 4299 flow. Second operand 6 states and 100 transitions. [2024-02-07 19:12:27,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 305 transitions, 5163 flow [2024-02-07 19:12:27,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 305 transitions, 4997 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 19:12:27,358 INFO L231 Difference]: Finished difference. Result has 138 places, 263 transitions, 4288 flow [2024-02-07 19:12:27,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4135, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4288, PETRI_PLACES=138, PETRI_TRANSITIONS=263} [2024-02-07 19:12:27,406 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 106 predicate places. [2024-02-07 19:12:27,406 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 263 transitions, 4288 flow [2024-02-07 19:12:27,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:27,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:27,407 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] [2024-02-07 19:12:27,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-02-07 19:12:27,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 19:12:27,607 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:27,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1056014544, now seen corresponding path program 5 times [2024-02-07 19:12:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:27,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257935556] [2024-02-07 19:12:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:27,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:27,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257935556] [2024-02-07 19:12:27,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257935556] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:27,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354151695] [2024-02-07 19:12:27,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:12:27,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:27,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:27,757 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:27,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-07 19:12:27,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:27,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:27,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 19:12:27,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:27,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354151695] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:28,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:28,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 19:12:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836297901] [2024-02-07 19:12:28,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:28,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:12:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:28,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:12:28,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:28,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:12:28,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 263 transitions, 4288 flow. Second operand has 13 states, 13 states have (on average 6.923076923076923) internal successors, (90), 13 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) [2024-02-07 19:12:28,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:28,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:12:28,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:28,858 INFO L124 PetriNetUnfolderBase]: 2328/3601 cut-off events. [2024-02-07 19:12:28,858 INFO L125 PetriNetUnfolderBase]: For 46824/46824 co-relation queries the response was YES. [2024-02-07 19:12:28,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23941 conditions, 3601 events. 2328/3601 cut-off events. For 46824/46824 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18368 event pairs, 626 based on Foata normal form. 20/3621 useless extension candidates. Maximal degree in co-relation 23886. Up to 2306 conditions per place. [2024-02-07 19:12:28,884 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 245 selfloop transitions, 93 changer transitions 0/339 dead transitions. [2024-02-07 19:12:28,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 339 transitions, 5473 flow [2024-02-07 19:12:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:12:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:12:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-02-07 19:12:28,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45141065830721006 [2024-02-07 19:12:28,886 INFO L175 Difference]: Start difference. First operand has 138 places, 263 transitions, 4288 flow. Second operand 11 states and 144 transitions. [2024-02-07 19:12:28,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 339 transitions, 5473 flow [2024-02-07 19:12:29,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 339 transitions, 5401 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:29,034 INFO L231 Difference]: Finished difference. Result has 150 places, 277 transitions, 4649 flow [2024-02-07 19:12:29,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4649, PETRI_PLACES=150, PETRI_TRANSITIONS=277} [2024-02-07 19:12:29,034 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 118 predicate places. [2024-02-07 19:12:29,034 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 277 transitions, 4649 flow [2024-02-07 19:12:29,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.923076923076923) internal successors, (90), 13 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) [2024-02-07 19:12:29,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:29,035 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] [2024-02-07 19:12:29,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:29,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-07 19:12:29,246 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:29,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1339167227, now seen corresponding path program 11 times [2024-02-07 19:12:29,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:29,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096903558] [2024-02-07 19:12:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:29,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:29,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:29,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096903558] [2024-02-07 19:12:29,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096903558] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:29,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:29,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:29,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623355941] [2024-02-07 19:12:29,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:29,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:29,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:29,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:29,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 277 transitions, 4649 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:29,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:29,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:29,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:29,993 INFO L124 PetriNetUnfolderBase]: 2420/3737 cut-off events. [2024-02-07 19:12:29,993 INFO L125 PetriNetUnfolderBase]: For 51565/51565 co-relation queries the response was YES. [2024-02-07 19:12:30,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25985 conditions, 3737 events. 2420/3737 cut-off events. For 51565/51565 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19121 event pairs, 758 based on Foata normal form. 16/3753 useless extension candidates. Maximal degree in co-relation 25926. Up to 3212 conditions per place. [2024-02-07 19:12:30,017 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 237 selfloop transitions, 106 changer transitions 0/344 dead transitions. [2024-02-07 19:12:30,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 344 transitions, 6078 flow [2024-02-07 19:12:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:30,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-02-07 19:12:30,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369458128078818 [2024-02-07 19:12:30,018 INFO L175 Difference]: Start difference. First operand has 150 places, 277 transitions, 4649 flow. Second operand 7 states and 109 transitions. [2024-02-07 19:12:30,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 344 transitions, 6078 flow [2024-02-07 19:12:30,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 344 transitions, 5924 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-02-07 19:12:30,147 INFO L231 Difference]: Finished difference. Result has 155 places, 303 transitions, 5316 flow [2024-02-07 19:12:30,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5316, PETRI_PLACES=155, PETRI_TRANSITIONS=303} [2024-02-07 19:12:30,148 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 123 predicate places. [2024-02-07 19:12:30,148 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 303 transitions, 5316 flow [2024-02-07 19:12:30,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:30,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:30,149 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] [2024-02-07 19:12:30,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-07 19:12:30,149 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:30,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:30,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1833334308, now seen corresponding path program 6 times [2024-02-07 19:12:30,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:30,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767706197] [2024-02-07 19:12:30,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:30,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:30,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:30,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767706197] [2024-02-07 19:12:30,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767706197] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:30,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978333774] [2024-02-07 19:12:30,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:12:30,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:30,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:30,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-07 19:12:30,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 19:12:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:30,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:12:30,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:30,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:30,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978333774] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:30,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:30,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 19:12:30,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822992729] [2024-02-07 19:12:30,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:30,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:12:30,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:12:30,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:30,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:12:30,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 303 transitions, 5316 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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) [2024-02-07 19:12:30,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:30,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:12:30,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:31,161 INFO L124 PetriNetUnfolderBase]: 2408/3712 cut-off events. [2024-02-07 19:12:31,162 INFO L125 PetriNetUnfolderBase]: For 55215/55215 co-relation queries the response was YES. [2024-02-07 19:12:31,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27167 conditions, 3712 events. 2408/3712 cut-off events. For 55215/55215 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18879 event pairs, 666 based on Foata normal form. 10/3722 useless extension candidates. Maximal degree in co-relation 27104. Up to 2442 conditions per place. [2024-02-07 19:12:31,188 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 245 selfloop transitions, 99 changer transitions 0/345 dead transitions. [2024-02-07 19:12:31,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 345 transitions, 6228 flow [2024-02-07 19:12:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:12:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:12:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2024-02-07 19:12:31,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4698275862068966 [2024-02-07 19:12:31,193 INFO L175 Difference]: Start difference. First operand has 155 places, 303 transitions, 5316 flow. Second operand 8 states and 109 transitions. [2024-02-07 19:12:31,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 345 transitions, 6228 flow [2024-02-07 19:12:31,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 345 transitions, 6088 flow, removed 70 selfloop flow, removed 0 redundant places. [2024-02-07 19:12:31,366 INFO L231 Difference]: Finished difference. Result has 162 places, 303 transitions, 5374 flow [2024-02-07 19:12:31,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5374, PETRI_PLACES=162, PETRI_TRANSITIONS=303} [2024-02-07 19:12:31,368 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 130 predicate places. [2024-02-07 19:12:31,368 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 303 transitions, 5374 flow [2024-02-07 19:12:31,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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) [2024-02-07 19:12:31,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:31,369 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] [2024-02-07 19:12:31,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:31,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:31,572 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:31,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash 70572553, now seen corresponding path program 12 times [2024-02-07 19:12:31,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:31,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641977324] [2024-02-07 19:12:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:31,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:31,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:31,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641977324] [2024-02-07 19:12:31,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641977324] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:31,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109511027] [2024-02-07 19:12:31,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:12:31,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:31,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:31,713 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:31,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-07 19:12:31,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 19:12:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:31,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:12:31,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:31,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:32,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109511027] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:32,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:32,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 13 [2024-02-07 19:12:32,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560190657] [2024-02-07 19:12:32,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:32,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:12:32,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:32,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:12:32,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:32,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:12:32,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 303 transitions, 5374 flow. Second operand has 13 states, 13 states have (on average 6.769230769230769) internal successors, (88), 13 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) [2024-02-07 19:12:32,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:32,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:12:32,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:33,355 INFO L124 PetriNetUnfolderBase]: 3491/5438 cut-off events. [2024-02-07 19:12:33,355 INFO L125 PetriNetUnfolderBase]: For 82403/82403 co-relation queries the response was YES. [2024-02-07 19:12:33,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40044 conditions, 5438 events. 3491/5438 cut-off events. For 82403/82403 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30521 event pairs, 531 based on Foata normal form. 26/5464 useless extension candidates. Maximal degree in co-relation 39980. Up to 2326 conditions per place. [2024-02-07 19:12:33,389 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 282 selfloop transitions, 315 changer transitions 0/598 dead transitions. [2024-02-07 19:12:33,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 598 transitions, 10447 flow [2024-02-07 19:12:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 19:12:33,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 19:12:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 273 transitions. [2024-02-07 19:12:33,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706896551724138 [2024-02-07 19:12:33,392 INFO L175 Difference]: Start difference. First operand has 162 places, 303 transitions, 5374 flow. Second operand 20 states and 273 transitions. [2024-02-07 19:12:33,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 598 transitions, 10447 flow [2024-02-07 19:12:33,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 598 transitions, 10240 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-02-07 19:12:33,636 INFO L231 Difference]: Finished difference. Result has 184 places, 445 transitions, 9107 flow [2024-02-07 19:12:33,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9107, PETRI_PLACES=184, PETRI_TRANSITIONS=445} [2024-02-07 19:12:33,637 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 152 predicate places. [2024-02-07 19:12:33,637 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 445 transitions, 9107 flow [2024-02-07 19:12:33,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.769230769230769) internal successors, (88), 13 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) [2024-02-07 19:12:33,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:33,637 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] [2024-02-07 19:12:33,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:33,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-02-07 19:12:33,842 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:33,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1636741309, now seen corresponding path program 13 times [2024-02-07 19:12:33,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:33,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41939377] [2024-02-07 19:12:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:33,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41939377] [2024-02-07 19:12:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41939377] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:33,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:33,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:33,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937032629] [2024-02-07 19:12:33,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:33,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:33,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:33,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:33,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 445 transitions, 9107 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:33,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:33,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:33,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:34,891 INFO L124 PetriNetUnfolderBase]: 3508/5461 cut-off events. [2024-02-07 19:12:34,891 INFO L125 PetriNetUnfolderBase]: For 111998/111998 co-relation queries the response was YES. [2024-02-07 19:12:34,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44869 conditions, 5461 events. 3508/5461 cut-off events. For 111998/111998 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30467 event pairs, 1059 based on Foata normal form. 2/5463 useless extension candidates. Maximal degree in co-relation 44797. Up to 5047 conditions per place. [2024-02-07 19:12:34,925 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 376 selfloop transitions, 94 changer transitions 2/473 dead transitions. [2024-02-07 19:12:34,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 473 transitions, 10355 flow [2024-02-07 19:12:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-02-07 19:12:34,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458128078817734 [2024-02-07 19:12:34,927 INFO L175 Difference]: Start difference. First operand has 184 places, 445 transitions, 9107 flow. Second operand 7 states and 93 transitions. [2024-02-07 19:12:34,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 473 transitions, 10355 flow [2024-02-07 19:12:35,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 473 transitions, 10023 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-02-07 19:12:35,268 INFO L231 Difference]: Finished difference. Result has 187 places, 455 transitions, 9198 flow [2024-02-07 19:12:35,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8791, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9198, PETRI_PLACES=187, PETRI_TRANSITIONS=455} [2024-02-07 19:12:35,269 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 155 predicate places. [2024-02-07 19:12:35,269 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 455 transitions, 9198 flow [2024-02-07 19:12:35,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:35,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:35,270 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] [2024-02-07 19:12:35,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-02-07 19:12:35,270 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:35,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:35,270 INFO L85 PathProgramCache]: Analyzing trace with hash -538624195, now seen corresponding path program 14 times [2024-02-07 19:12:35,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:35,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260931380] [2024-02-07 19:12:35,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:35,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:35,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:35,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260931380] [2024-02-07 19:12:35,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260931380] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:35,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:35,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:35,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444973677] [2024-02-07 19:12:35,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:35,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:35,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:35,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:35,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:35,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 455 transitions, 9198 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:35,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:35,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:35,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:36,341 INFO L124 PetriNetUnfolderBase]: 3513/5468 cut-off events. [2024-02-07 19:12:36,342 INFO L125 PetriNetUnfolderBase]: For 106698/106698 co-relation queries the response was YES. [2024-02-07 19:12:36,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44350 conditions, 5468 events. 3513/5468 cut-off events. For 106698/106698 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30492 event pairs, 1067 based on Foata normal form. 2/5470 useless extension candidates. Maximal degree in co-relation 44276. Up to 5051 conditions per place. [2024-02-07 19:12:36,387 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 384 selfloop transitions, 92 changer transitions 2/479 dead transitions. [2024-02-07 19:12:36,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 479 transitions, 10369 flow [2024-02-07 19:12:36,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-02-07 19:12:36,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2024-02-07 19:12:36,388 INFO L175 Difference]: Start difference. First operand has 187 places, 455 transitions, 9198 flow. Second operand 7 states and 95 transitions. [2024-02-07 19:12:36,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 479 transitions, 10369 flow [2024-02-07 19:12:36,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 479 transitions, 10167 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-02-07 19:12:36,766 INFO L231 Difference]: Finished difference. Result has 191 places, 461 transitions, 9322 flow [2024-02-07 19:12:36,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9004, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9322, PETRI_PLACES=191, PETRI_TRANSITIONS=461} [2024-02-07 19:12:36,767 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 159 predicate places. [2024-02-07 19:12:36,767 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 461 transitions, 9322 flow [2024-02-07 19:12:36,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:36,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:36,768 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] [2024-02-07 19:12:36,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-02-07 19:12:36,768 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:36,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1446907679, now seen corresponding path program 15 times [2024-02-07 19:12:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:36,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113998205] [2024-02-07 19:12:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:36,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:36,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:36,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113998205] [2024-02-07 19:12:36,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113998205] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:36,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999195441] [2024-02-07 19:12:36,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:12:36,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:36,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:36,873 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:36,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-07 19:12:36,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 19:12:36,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:36,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:12:36,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:37,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:37,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999195441] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:37,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:37,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 13 [2024-02-07 19:12:37,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58057642] [2024-02-07 19:12:37,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:37,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:12:37,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:12:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:37,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:37,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 461 transitions, 9322 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-02-07 19:12:37,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:37,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:37,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:38,357 INFO L124 PetriNetUnfolderBase]: 3534/5498 cut-off events. [2024-02-07 19:12:38,357 INFO L125 PetriNetUnfolderBase]: For 104914/104914 co-relation queries the response was YES. [2024-02-07 19:12:38,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44732 conditions, 5498 events. 3534/5498 cut-off events. For 104914/104914 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30828 event pairs, 813 based on Foata normal form. 22/5520 useless extension candidates. Maximal degree in co-relation 44656. Up to 4178 conditions per place. [2024-02-07 19:12:38,406 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 344 selfloop transitions, 225 changer transitions 0/570 dead transitions. [2024-02-07 19:12:38,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 570 transitions, 11540 flow [2024-02-07 19:12:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 19:12:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 19:12:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 201 transitions. [2024-02-07 19:12:38,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49507389162561577 [2024-02-07 19:12:38,408 INFO L175 Difference]: Start difference. First operand has 191 places, 461 transitions, 9322 flow. Second operand 14 states and 201 transitions. [2024-02-07 19:12:38,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 570 transitions, 11540 flow [2024-02-07 19:12:38,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 570 transitions, 11369 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:38,901 INFO L231 Difference]: Finished difference. Result has 209 places, 481 transitions, 10146 flow [2024-02-07 19:12:38,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9151, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10146, PETRI_PLACES=209, PETRI_TRANSITIONS=481} [2024-02-07 19:12:38,901 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 177 predicate places. [2024-02-07 19:12:38,902 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 481 transitions, 10146 flow [2024-02-07 19:12:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 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) [2024-02-07 19:12:38,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:38,902 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] [2024-02-07 19:12:38,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:39,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-02-07 19:12:39,108 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:39,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1007447617, now seen corresponding path program 16 times [2024-02-07 19:12:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:39,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729737465] [2024-02-07 19:12:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:39,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:39,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:39,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:39,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729737465] [2024-02-07 19:12:39,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729737465] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:39,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:39,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:39,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702837483] [2024-02-07 19:12:39,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:39,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:39,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:39,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:39,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 481 transitions, 10146 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:39,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:39,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:39,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:40,204 INFO L124 PetriNetUnfolderBase]: 3550/5522 cut-off events. [2024-02-07 19:12:40,205 INFO L125 PetriNetUnfolderBase]: For 113995/113995 co-relation queries the response was YES. [2024-02-07 19:12:40,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46522 conditions, 5522 events. 3550/5522 cut-off events. For 113995/113995 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30805 event pairs, 1077 based on Foata normal form. 2/5524 useless extension candidates. Maximal degree in co-relation 46438. Up to 5097 conditions per place. [2024-02-07 19:12:40,256 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 404 selfloop transitions, 101 changer transitions 2/508 dead transitions. [2024-02-07 19:12:40,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 508 transitions, 11448 flow [2024-02-07 19:12:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-02-07 19:12:40,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-02-07 19:12:40,257 INFO L175 Difference]: Start difference. First operand has 209 places, 481 transitions, 10146 flow. Second operand 7 states and 92 transitions. [2024-02-07 19:12:40,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 508 transitions, 11448 flow [2024-02-07 19:12:40,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 508 transitions, 11227 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-02-07 19:12:40,758 INFO L231 Difference]: Finished difference. Result has 213 places, 487 transitions, 10292 flow [2024-02-07 19:12:40,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9938, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10292, PETRI_PLACES=213, PETRI_TRANSITIONS=487} [2024-02-07 19:12:40,759 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 181 predicate places. [2024-02-07 19:12:40,759 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 487 transitions, 10292 flow [2024-02-07 19:12:40,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:40,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:40,759 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] [2024-02-07 19:12:40,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-02-07 19:12:40,760 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:40,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash -609108525, now seen corresponding path program 17 times [2024-02-07 19:12:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:40,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479707297] [2024-02-07 19:12:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:40,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:40,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:40,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479707297] [2024-02-07 19:12:40,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479707297] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:40,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862192466] [2024-02-07 19:12:40,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:12:40,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:40,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:40,871 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:40,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-07 19:12:40,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:40,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:40,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 19:12:40,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:41,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:41,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862192466] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:41,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:41,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 12 [2024-02-07 19:12:41,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500925170] [2024-02-07 19:12:41,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:41,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:12:41,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:41,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:12:41,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:12:41,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:41,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 487 transitions, 10292 flow. Second operand has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 12 states have internal predecessors, (95), 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) [2024-02-07 19:12:41,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:41,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:41,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:42,330 INFO L124 PetriNetUnfolderBase]: 3544/5484 cut-off events. [2024-02-07 19:12:42,330 INFO L125 PetriNetUnfolderBase]: For 108990/108990 co-relation queries the response was YES. [2024-02-07 19:12:42,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46530 conditions, 5484 events. 3544/5484 cut-off events. For 108990/108990 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30466 event pairs, 832 based on Foata normal form. 16/5500 useless extension candidates. Maximal degree in co-relation 46443. Up to 4209 conditions per place. [2024-02-07 19:12:42,382 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 349 selfloop transitions, 229 changer transitions 0/579 dead transitions. [2024-02-07 19:12:42,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 579 transitions, 12268 flow [2024-02-07 19:12:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 19:12:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 19:12:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 204 transitions. [2024-02-07 19:12:42,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689655172413793 [2024-02-07 19:12:42,384 INFO L175 Difference]: Start difference. First operand has 213 places, 487 transitions, 10292 flow. Second operand 15 states and 204 transitions. [2024-02-07 19:12:42,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 579 transitions, 12268 flow [2024-02-07 19:12:42,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 579 transitions, 12050 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-02-07 19:12:42,886 INFO L231 Difference]: Finished difference. Result has 223 places, 493 transitions, 10656 flow [2024-02-07 19:12:42,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10074, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10656, PETRI_PLACES=223, PETRI_TRANSITIONS=493} [2024-02-07 19:12:42,886 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 191 predicate places. [2024-02-07 19:12:42,886 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 493 transitions, 10656 flow [2024-02-07 19:12:42,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 12 states have internal predecessors, (95), 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) [2024-02-07 19:12:42,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:42,887 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] [2024-02-07 19:12:42,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:43,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:43,098 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:43,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:43,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1568159925, now seen corresponding path program 18 times [2024-02-07 19:12:43,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:43,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170221272] [2024-02-07 19:12:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:43,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:43,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:43,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170221272] [2024-02-07 19:12:43,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170221272] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:43,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:43,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:43,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648829187] [2024-02-07 19:12:43,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:43,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:43,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:43,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:43,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:12:43,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 493 transitions, 10656 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:12:43,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:43,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:12:43,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:44,348 INFO L124 PetriNetUnfolderBase]: 3552/5498 cut-off events. [2024-02-07 19:12:44,348 INFO L125 PetriNetUnfolderBase]: For 116224/116224 co-relation queries the response was YES. [2024-02-07 19:12:44,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47432 conditions, 5498 events. 3552/5498 cut-off events. For 116224/116224 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30498 event pairs, 1078 based on Foata normal form. 6/5504 useless extension candidates. Maximal degree in co-relation 47345. Up to 5070 conditions per place. [2024-02-07 19:12:44,397 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 415 selfloop transitions, 99 changer transitions 0/515 dead transitions. [2024-02-07 19:12:44,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 515 transitions, 11832 flow [2024-02-07 19:12:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:44,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-02-07 19:12:44,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-02-07 19:12:44,399 INFO L175 Difference]: Start difference. First operand has 223 places, 493 transitions, 10656 flow. Second operand 7 states and 92 transitions. [2024-02-07 19:12:44,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 515 transitions, 11832 flow [2024-02-07 19:12:44,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 515 transitions, 11368 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-02-07 19:12:44,891 INFO L231 Difference]: Finished difference. Result has 220 places, 494 transitions, 10418 flow [2024-02-07 19:12:44,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10194, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10418, PETRI_PLACES=220, PETRI_TRANSITIONS=494} [2024-02-07 19:12:44,892 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 188 predicate places. [2024-02-07 19:12:44,892 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 494 transitions, 10418 flow [2024-02-07 19:12:44,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:12:44,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:44,892 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] [2024-02-07 19:12:44,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-02-07 19:12:44,893 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:44,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:44,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2021759133, now seen corresponding path program 19 times [2024-02-07 19:12:44,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:44,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754792152] [2024-02-07 19:12:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:44,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:44,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:44,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754792152] [2024-02-07 19:12:44,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754792152] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:44,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:44,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:44,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965299333] [2024-02-07 19:12:44,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:44,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:44,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:44,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:44,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:44,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 494 transitions, 10418 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:44,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:44,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:44,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:45,952 INFO L124 PetriNetUnfolderBase]: 3551/5499 cut-off events. [2024-02-07 19:12:45,953 INFO L125 PetriNetUnfolderBase]: For 111703/111703 co-relation queries the response was YES. [2024-02-07 19:12:45,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46613 conditions, 5499 events. 3551/5499 cut-off events. For 111703/111703 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30553 event pairs, 1078 based on Foata normal form. 2/5501 useless extension candidates. Maximal degree in co-relation 46525. Up to 5080 conditions per place. [2024-02-07 19:12:46,006 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 411 selfloop transitions, 99 changer transitions 2/513 dead transitions. [2024-02-07 19:12:46,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 513 transitions, 11569 flow [2024-02-07 19:12:46,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-02-07 19:12:46,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2024-02-07 19:12:46,008 INFO L175 Difference]: Start difference. First operand has 220 places, 494 transitions, 10418 flow. Second operand 7 states and 95 transitions. [2024-02-07 19:12:46,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 513 transitions, 11569 flow [2024-02-07 19:12:46,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 513 transitions, 11375 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-02-07 19:12:46,531 INFO L231 Difference]: Finished difference. Result has 223 places, 495 transitions, 10451 flow [2024-02-07 19:12:46,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10224, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10451, PETRI_PLACES=223, PETRI_TRANSITIONS=495} [2024-02-07 19:12:46,536 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 191 predicate places. [2024-02-07 19:12:46,536 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 495 transitions, 10451 flow [2024-02-07 19:12:46,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:46,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:46,537 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] [2024-02-07 19:12:46,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-02-07 19:12:46,537 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:46,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:46,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1175091049, now seen corresponding path program 20 times [2024-02-07 19:12:46,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:46,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379387621] [2024-02-07 19:12:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:46,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:46,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:46,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379387621] [2024-02-07 19:12:46,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379387621] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:46,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:46,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:46,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766562128] [2024-02-07 19:12:46,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:46,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:46,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:46,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:46,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:46,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:46,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 495 transitions, 10451 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:46,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:46,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:46,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:47,742 INFO L124 PetriNetUnfolderBase]: 3548/5494 cut-off events. [2024-02-07 19:12:47,743 INFO L125 PetriNetUnfolderBase]: For 110950/110950 co-relation queries the response was YES. [2024-02-07 19:12:47,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46566 conditions, 5494 events. 3548/5494 cut-off events. For 110950/110950 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30468 event pairs, 1074 based on Foata normal form. 2/5496 useless extension candidates. Maximal degree in co-relation 46477. Up to 5078 conditions per place. [2024-02-07 19:12:47,801 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 405 selfloop transitions, 103 changer transitions 2/511 dead transitions. [2024-02-07 19:12:47,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 511 transitions, 11549 flow [2024-02-07 19:12:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-02-07 19:12:47,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458128078817734 [2024-02-07 19:12:47,803 INFO L175 Difference]: Start difference. First operand has 223 places, 495 transitions, 10451 flow. Second operand 7 states and 93 transitions. [2024-02-07 19:12:47,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 511 transitions, 11549 flow [2024-02-07 19:12:48,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 511 transitions, 11430 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-02-07 19:12:48,365 INFO L231 Difference]: Finished difference. Result has 226 places, 494 transitions, 10512 flow [2024-02-07 19:12:48,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10300, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10512, PETRI_PLACES=226, PETRI_TRANSITIONS=494} [2024-02-07 19:12:48,368 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 194 predicate places. [2024-02-07 19:12:48,368 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 494 transitions, 10512 flow [2024-02-07 19:12:48,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:48,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:48,369 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] [2024-02-07 19:12:48,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-02-07 19:12:48,369 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:48,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:48,370 INFO L85 PathProgramCache]: Analyzing trace with hash 272301531, now seen corresponding path program 21 times [2024-02-07 19:12:48,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:48,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669764430] [2024-02-07 19:12:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:48,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:48,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:48,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669764430] [2024-02-07 19:12:48,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669764430] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:48,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133856798] [2024-02-07 19:12:48,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:12:48,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:48,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:48,488 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:48,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-07 19:12:48,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 19:12:48,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:48,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:12:48,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:48,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:48,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133856798] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:48,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:48,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 14 [2024-02-07 19:12:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522680624] [2024-02-07 19:12:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:48,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:48,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:12:48,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:48,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 494 transitions, 10512 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:48,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:48,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:48,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:49,998 INFO L124 PetriNetUnfolderBase]: 3615/5620 cut-off events. [2024-02-07 19:12:49,998 INFO L125 PetriNetUnfolderBase]: For 111277/111277 co-relation queries the response was YES. [2024-02-07 19:12:50,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47651 conditions, 5620 events. 3615/5620 cut-off events. For 111277/111277 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 31479 event pairs, 905 based on Foata normal form. 12/5632 useless extension candidates. Maximal degree in co-relation 47561. Up to 4698 conditions per place. [2024-02-07 19:12:50,072 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 368 selfloop transitions, 195 changer transitions 0/564 dead transitions. [2024-02-07 19:12:50,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 564 transitions, 12620 flow [2024-02-07 19:12:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:12:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:12:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-02-07 19:12:50,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459770114942529 [2024-02-07 19:12:50,074 INFO L175 Difference]: Start difference. First operand has 226 places, 494 transitions, 10512 flow. Second operand 6 states and 95 transitions. [2024-02-07 19:12:50,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 564 transitions, 12620 flow [2024-02-07 19:12:50,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 564 transitions, 12488 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-02-07 19:12:50,691 INFO L231 Difference]: Finished difference. Result has 231 places, 525 transitions, 11633 flow [2024-02-07 19:12:50,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10383, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11633, PETRI_PLACES=231, PETRI_TRANSITIONS=525} [2024-02-07 19:12:50,692 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 199 predicate places. [2024-02-07 19:12:50,692 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 525 transitions, 11633 flow [2024-02-07 19:12:50,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:50,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:50,692 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] [2024-02-07 19:12:50,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:50,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:50,906 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:50,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash -495479721, now seen corresponding path program 22 times [2024-02-07 19:12:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:50,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946644666] [2024-02-07 19:12:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:50,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:51,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:51,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946644666] [2024-02-07 19:12:51,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946644666] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258505768] [2024-02-07 19:12:51,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:12:51,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:51,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:51,026 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:51,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-07 19:12:51,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:12:51,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:51,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:12:51,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:51,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:51,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258505768] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:51,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 19:12:51,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2024-02-07 19:12:51,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819892456] [2024-02-07 19:12:51,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:51,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:12:51,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:12:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:12:51,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:51,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 525 transitions, 11633 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:51,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:51,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:51,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:52,644 INFO L124 PetriNetUnfolderBase]: 4031/6197 cut-off events. [2024-02-07 19:12:52,644 INFO L125 PetriNetUnfolderBase]: For 126681/126681 co-relation queries the response was YES. [2024-02-07 19:12:52,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53642 conditions, 6197 events. 4031/6197 cut-off events. For 126681/126681 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34759 event pairs, 689 based on Foata normal form. 12/6209 useless extension candidates. Maximal degree in co-relation 53548. Up to 3622 conditions per place. [2024-02-07 19:12:52,712 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 330 selfloop transitions, 303 changer transitions 0/634 dead transitions. [2024-02-07 19:12:52,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 634 transitions, 14431 flow [2024-02-07 19:12:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:52,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-02-07 19:12:52,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911330049261084 [2024-02-07 19:12:52,713 INFO L175 Difference]: Start difference. First operand has 231 places, 525 transitions, 11633 flow. Second operand 7 states and 120 transitions. [2024-02-07 19:12:52,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 634 transitions, 14431 flow [2024-02-07 19:12:53,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 634 transitions, 14218 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:53,385 INFO L231 Difference]: Finished difference. Result has 241 places, 564 transitions, 13403 flow [2024-02-07 19:12:53,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11435, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13403, PETRI_PLACES=241, PETRI_TRANSITIONS=564} [2024-02-07 19:12:53,386 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 209 predicate places. [2024-02-07 19:12:53,386 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 564 transitions, 13403 flow [2024-02-07 19:12:53,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 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) [2024-02-07 19:12:53,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:53,386 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] [2024-02-07 19:12:53,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:53,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:53,613 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:53,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:53,614 INFO L85 PathProgramCache]: Analyzing trace with hash -635816661, now seen corresponding path program 2 times [2024-02-07 19:12:53,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:53,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001250042] [2024-02-07 19:12:53,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:53,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:53,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:53,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001250042] [2024-02-07 19:12:53,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001250042] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:53,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:53,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:53,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815341698] [2024-02-07 19:12:53,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:53,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:53,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:53,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:53,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 564 transitions, 13403 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:53,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:53,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:53,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:55,078 INFO L124 PetriNetUnfolderBase]: 4042/6256 cut-off events. [2024-02-07 19:12:55,078 INFO L125 PetriNetUnfolderBase]: For 155013/155013 co-relation queries the response was YES. [2024-02-07 19:12:55,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56984 conditions, 6256 events. 4042/6256 cut-off events. For 155013/155013 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35551 event pairs, 1164 based on Foata normal form. 24/6280 useless extension candidates. Maximal degree in co-relation 56886. Up to 5605 conditions per place. [2024-02-07 19:12:55,157 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 488 selfloop transitions, 108 changer transitions 10/607 dead transitions. [2024-02-07 19:12:55,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 607 transitions, 14922 flow [2024-02-07 19:12:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:12:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:12:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-02-07 19:12:55,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369458128078818 [2024-02-07 19:12:55,159 INFO L175 Difference]: Start difference. First operand has 241 places, 564 transitions, 13403 flow. Second operand 7 states and 109 transitions. [2024-02-07 19:12:55,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 607 transitions, 14922 flow [2024-02-07 19:12:56,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 607 transitions, 14885 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:56,026 INFO L231 Difference]: Finished difference. Result has 249 places, 565 transitions, 13642 flow [2024-02-07 19:12:56,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13370, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13642, PETRI_PLACES=249, PETRI_TRANSITIONS=565} [2024-02-07 19:12:56,027 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 217 predicate places. [2024-02-07 19:12:56,027 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 565 transitions, 13642 flow [2024-02-07 19:12:56,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:56,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:56,027 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] [2024-02-07 19:12:56,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-02-07 19:12:56,027 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:56,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:56,028 INFO L85 PathProgramCache]: Analyzing trace with hash 807373764, now seen corresponding path program 7 times [2024-02-07 19:12:56,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:56,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680669660] [2024-02-07 19:12:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:56,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:56,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:56,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680669660] [2024-02-07 19:12:56,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680669660] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:56,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022946734] [2024-02-07 19:12:56,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:12:56,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:56,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:56,133 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:56,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-07 19:12:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:56,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 19:12:56,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:56,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:56,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022946734] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:56,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:56,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 19:12:56,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871471364] [2024-02-07 19:12:56,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:12:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:12:56,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:12:56,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:12:56,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 565 transitions, 13642 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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) [2024-02-07 19:12:56,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:56,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:12:56,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:58,375 INFO L124 PetriNetUnfolderBase]: 4355/6774 cut-off events. [2024-02-07 19:12:58,375 INFO L125 PetriNetUnfolderBase]: For 164339/164339 co-relation queries the response was YES. [2024-02-07 19:12:58,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61065 conditions, 6774 events. 4355/6774 cut-off events. For 164339/164339 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 39414 event pairs, 980 based on Foata normal form. 16/6790 useless extension candidates. Maximal degree in co-relation 60964. Up to 3959 conditions per place. [2024-02-07 19:12:58,463 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 370 selfloop transitions, 290 changer transitions 0/661 dead transitions. [2024-02-07 19:12:58,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 661 transitions, 16126 flow [2024-02-07 19:12:58,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:12:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:12:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 165 transitions. [2024-02-07 19:12:58,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47413793103448276 [2024-02-07 19:12:58,465 INFO L175 Difference]: Start difference. First operand has 249 places, 565 transitions, 13642 flow. Second operand 12 states and 165 transitions. [2024-02-07 19:12:58,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 661 transitions, 16126 flow [2024-02-07 19:12:59,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 661 transitions, 15887 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-02-07 19:12:59,459 INFO L231 Difference]: Finished difference. Result has 259 places, 587 transitions, 14880 flow [2024-02-07 19:12:59,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13423, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14880, PETRI_PLACES=259, PETRI_TRANSITIONS=587} [2024-02-07 19:12:59,460 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 227 predicate places. [2024-02-07 19:12:59,460 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 587 transitions, 14880 flow [2024-02-07 19:12:59,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 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) [2024-02-07 19:12:59,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:59,461 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] [2024-02-07 19:12:59,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:59,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:59,676 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:59,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:59,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1909013477, now seen corresponding path program 3 times [2024-02-07 19:12:59,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:59,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994155419] [2024-02-07 19:12:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:59,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:59,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:59,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994155419] [2024-02-07 19:12:59,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994155419] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:59,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:59,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:12:59,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218101777] [2024-02-07 19:12:59,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:59,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:12:59,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:12:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:12:59,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:59,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 587 transitions, 14880 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:12:59,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:59,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:59,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:01,357 INFO L124 PetriNetUnfolderBase]: 4367/6828 cut-off events. [2024-02-07 19:13:01,357 INFO L125 PetriNetUnfolderBase]: For 177444/177444 co-relation queries the response was YES. [2024-02-07 19:13:01,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63712 conditions, 6828 events. 4367/6828 cut-off events. For 177444/177444 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 40154 event pairs, 1374 based on Foata normal form. 18/6846 useless extension candidates. Maximal degree in co-relation 63608. Up to 6243 conditions per place. [2024-02-07 19:13:01,428 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 505 selfloop transitions, 105 changer transitions 12/623 dead transitions. [2024-02-07 19:13:01,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 623 transitions, 16338 flow [2024-02-07 19:13:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:01,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-02-07 19:13:01,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270935960591133 [2024-02-07 19:13:01,430 INFO L175 Difference]: Start difference. First operand has 259 places, 587 transitions, 14880 flow. Second operand 7 states and 107 transitions. [2024-02-07 19:13:01,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 623 transitions, 16338 flow [2024-02-07 19:13:02,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 623 transitions, 16035 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-02-07 19:13:02,330 INFO L231 Difference]: Finished difference. Result has 262 places, 583 transitions, 14685 flow [2024-02-07 19:13:02,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14578, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14685, PETRI_PLACES=262, PETRI_TRANSITIONS=583} [2024-02-07 19:13:02,331 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2024-02-07 19:13:02,331 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 583 transitions, 14685 flow [2024-02-07 19:13:02,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:02,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:02,332 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] [2024-02-07 19:13:02,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-02-07 19:13:02,332 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:02,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash -623981059, now seen corresponding path program 4 times [2024-02-07 19:13:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:02,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863298933] [2024-02-07 19:13:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:02,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:02,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863298933] [2024-02-07 19:13:02,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863298933] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:02,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45106442] [2024-02-07 19:13:02,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:13:02,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:02,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:02,418 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:02,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-07 19:13:02,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:13:02,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:02,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:13:02,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:02,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:02,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45106442] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:02,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:02,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 19:13:02,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070008541] [2024-02-07 19:13:02,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:02,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:13:02,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:02,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:13:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:13:02,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:13:02,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 583 transitions, 14685 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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) [2024-02-07 19:13:02,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:02,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:13:02,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:04,317 INFO L124 PetriNetUnfolderBase]: 4347/6774 cut-off events. [2024-02-07 19:13:04,317 INFO L125 PetriNetUnfolderBase]: For 180433/180433 co-relation queries the response was YES. [2024-02-07 19:13:04,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62950 conditions, 6774 events. 4347/6774 cut-off events. For 180433/180433 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 39501 event pairs, 1304 based on Foata normal form. 16/6790 useless extension candidates. Maximal degree in co-relation 62843. Up to 6167 conditions per place. [2024-02-07 19:13:04,379 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 499 selfloop transitions, 114 changer transitions 0/614 dead transitions. [2024-02-07 19:13:04,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 614 transitions, 16131 flow [2024-02-07 19:13:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:13:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:13:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-02-07 19:13:04,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2024-02-07 19:13:04,380 INFO L175 Difference]: Start difference. First operand has 262 places, 583 transitions, 14685 flow. Second operand 8 states and 100 transitions. [2024-02-07 19:13:04,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 614 transitions, 16131 flow [2024-02-07 19:13:05,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 614 transitions, 15915 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 19:13:05,157 INFO L231 Difference]: Finished difference. Result has 263 places, 586 transitions, 14769 flow [2024-02-07 19:13:05,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14471, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14769, PETRI_PLACES=263, PETRI_TRANSITIONS=586} [2024-02-07 19:13:05,158 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 231 predicate places. [2024-02-07 19:13:05,158 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 586 transitions, 14769 flow [2024-02-07 19:13:05,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 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) [2024-02-07 19:13:05,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:05,158 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] [2024-02-07 19:13:05,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-02-07 19:13:05,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:05,371 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:05,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:05,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1177916583, now seen corresponding path program 5 times [2024-02-07 19:13:05,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:05,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045080712] [2024-02-07 19:13:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:05,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:05,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:05,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045080712] [2024-02-07 19:13:05,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045080712] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:05,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261769131] [2024-02-07 19:13:05,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:13:05,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:05,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:05,475 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:05,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-07 19:13:05,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:13:05,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:05,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:13:05,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:05,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:05,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261769131] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:05,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:05,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 19:13:05,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774132750] [2024-02-07 19:13:05,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:05,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:13:05,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:05,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:13:05,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:13:05,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:13:05,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 586 transitions, 14769 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 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) [2024-02-07 19:13:05,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:05,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:13:05,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:07,430 INFO L124 PetriNetUnfolderBase]: 4345/6761 cut-off events. [2024-02-07 19:13:07,430 INFO L125 PetriNetUnfolderBase]: For 178752/178752 co-relation queries the response was YES. [2024-02-07 19:13:07,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63120 conditions, 6761 events. 4345/6761 cut-off events. For 178752/178752 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 39307 event pairs, 1352 based on Foata normal form. 4/6765 useless extension candidates. Maximal degree in co-relation 63013. Up to 6243 conditions per place. [2024-02-07 19:13:07,529 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 498 selfloop transitions, 111 changer transitions 0/610 dead transitions. [2024-02-07 19:13:07,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 610 transitions, 16171 flow [2024-02-07 19:13:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:13:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:13:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-02-07 19:13:07,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40086206896551724 [2024-02-07 19:13:07,533 INFO L175 Difference]: Start difference. First operand has 263 places, 586 transitions, 14769 flow. Second operand 8 states and 93 transitions. [2024-02-07 19:13:07,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 610 transitions, 16171 flow [2024-02-07 19:13:08,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 610 transitions, 15931 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-02-07 19:13:08,625 INFO L231 Difference]: Finished difference. Result has 265 places, 588 transitions, 14802 flow [2024-02-07 19:13:08,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14511, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14802, PETRI_PLACES=265, PETRI_TRANSITIONS=588} [2024-02-07 19:13:08,626 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 233 predicate places. [2024-02-07 19:13:08,626 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 588 transitions, 14802 flow [2024-02-07 19:13:08,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 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) [2024-02-07 19:13:08,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:08,627 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] [2024-02-07 19:13:08,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:08,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:08,838 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:08,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:08,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2060611991, now seen corresponding path program 23 times [2024-02-07 19:13:08,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:08,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622077730] [2024-02-07 19:13:08,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:08,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:08,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:08,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622077730] [2024-02-07 19:13:08,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622077730] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:08,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341381821] [2024-02-07 19:13:08,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:13:08,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:08,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:08,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:08,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-07 19:13:09,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:13:09,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:09,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:13:09,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:09,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:09,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:09,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341381821] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:09,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:09,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 13 [2024-02-07 19:13:09,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320887676] [2024-02-07 19:13:09,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:09,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:13:09,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:09,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:13:09,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:13:09,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:13:09,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 588 transitions, 14802 flow. Second operand has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 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) [2024-02-07 19:13:09,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:09,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:13:09,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:11,026 INFO L124 PetriNetUnfolderBase]: 4492/7032 cut-off events. [2024-02-07 19:13:11,026 INFO L125 PetriNetUnfolderBase]: For 183897/183897 co-relation queries the response was YES. [2024-02-07 19:13:11,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65485 conditions, 7032 events. 4492/7032 cut-off events. For 183897/183897 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 41768 event pairs, 1029 based on Foata normal form. 8/7040 useless extension candidates. Maximal degree in co-relation 65378. Up to 5096 conditions per place. [2024-02-07 19:13:11,117 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 448 selfloop transitions, 280 changer transitions 0/729 dead transitions. [2024-02-07 19:13:11,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 729 transitions, 18562 flow [2024-02-07 19:13:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 19:13:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 19:13:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-02-07 19:13:11,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376657824933687 [2024-02-07 19:13:11,118 INFO L175 Difference]: Start difference. First operand has 265 places, 588 transitions, 14802 flow. Second operand 13 states and 165 transitions. [2024-02-07 19:13:11,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 729 transitions, 18562 flow [2024-02-07 19:13:12,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 729 transitions, 18342 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-02-07 19:13:12,361 INFO L231 Difference]: Finished difference. Result has 276 places, 638 transitions, 16730 flow [2024-02-07 19:13:12,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14584, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16730, PETRI_PLACES=276, PETRI_TRANSITIONS=638} [2024-02-07 19:13:12,362 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 244 predicate places. [2024-02-07 19:13:12,362 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 638 transitions, 16730 flow [2024-02-07 19:13:12,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 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) [2024-02-07 19:13:12,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:12,363 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] [2024-02-07 19:13:12,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-02-07 19:13:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-02-07 19:13:12,576 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:12,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 311733270, now seen corresponding path program 8 times [2024-02-07 19:13:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:12,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041282518] [2024-02-07 19:13:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:12,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:12,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:12,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041282518] [2024-02-07 19:13:12,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041282518] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:12,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782636569] [2024-02-07 19:13:12,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:13:12,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:12,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:12,701 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:12,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-07 19:13:12,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:13:12,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:12,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:13:12,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:12,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:12,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782636569] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:12,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:12,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 19:13:12,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130025968] [2024-02-07 19:13:12,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:12,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:13:12,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:13:12,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:13:12,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:12,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 638 transitions, 16730 flow. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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) [2024-02-07 19:13:12,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:12,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:12,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:14,850 INFO L124 PetriNetUnfolderBase]: 4542/7106 cut-off events. [2024-02-07 19:13:14,850 INFO L125 PetriNetUnfolderBase]: For 203750/203750 co-relation queries the response was YES. [2024-02-07 19:13:14,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68582 conditions, 7106 events. 4542/7106 cut-off events. For 203750/203750 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 42133 event pairs, 1343 based on Foata normal form. 20/7126 useless extension candidates. Maximal degree in co-relation 68470. Up to 6534 conditions per place. [2024-02-07 19:13:14,927 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 553 selfloop transitions, 121 changer transitions 0/675 dead transitions. [2024-02-07 19:13:14,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 675 transitions, 18441 flow [2024-02-07 19:13:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:13:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:13:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-02-07 19:13:14,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-02-07 19:13:14,928 INFO L175 Difference]: Start difference. First operand has 276 places, 638 transitions, 16730 flow. Second operand 8 states and 112 transitions. [2024-02-07 19:13:14,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 675 transitions, 18441 flow [2024-02-07 19:13:16,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 675 transitions, 18297 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-02-07 19:13:16,099 INFO L231 Difference]: Finished difference. Result has 281 places, 644 transitions, 16983 flow [2024-02-07 19:13:16,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16586, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16983, PETRI_PLACES=281, PETRI_TRANSITIONS=644} [2024-02-07 19:13:16,100 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 249 predicate places. [2024-02-07 19:13:16,100 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 644 transitions, 16983 flow [2024-02-07 19:13:16,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 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) [2024-02-07 19:13:16,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:16,101 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] [2024-02-07 19:13:16,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-02-07 19:13:16,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-02-07 19:13:16,311 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:16,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1665187298, now seen corresponding path program 9 times [2024-02-07 19:13:16,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:16,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499190041] [2024-02-07 19:13:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:16,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:16,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:16,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499190041] [2024-02-07 19:13:16,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499190041] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:16,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:16,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:16,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491638353] [2024-02-07 19:13:16,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:16,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:16,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:16,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:16,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:16,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:16,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 644 transitions, 16983 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:16,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:16,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:16,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:18,047 INFO L124 PetriNetUnfolderBase]: 4548/7116 cut-off events. [2024-02-07 19:13:18,047 INFO L125 PetriNetUnfolderBase]: For 204554/204554 co-relation queries the response was YES. [2024-02-07 19:13:18,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69044 conditions, 7116 events. 4548/7116 cut-off events. For 204554/204554 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 42214 event pairs, 1371 based on Foata normal form. 4/7120 useless extension candidates. Maximal degree in co-relation 68929. Up to 6575 conditions per place. [2024-02-07 19:13:18,121 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 552 selfloop transitions, 118 changer transitions 0/671 dead transitions. [2024-02-07 19:13:18,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 671 transitions, 18559 flow [2024-02-07 19:13:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-02-07 19:13:18,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073891625615764 [2024-02-07 19:13:18,122 INFO L175 Difference]: Start difference. First operand has 281 places, 644 transitions, 16983 flow. Second operand 7 states and 103 transitions. [2024-02-07 19:13:18,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 671 transitions, 18559 flow [2024-02-07 19:13:19,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 671 transitions, 18330 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-02-07 19:13:19,096 INFO L231 Difference]: Finished difference. Result has 282 places, 645 transitions, 17020 flow [2024-02-07 19:13:19,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16755, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17020, PETRI_PLACES=282, PETRI_TRANSITIONS=645} [2024-02-07 19:13:19,097 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 250 predicate places. [2024-02-07 19:13:19,097 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 645 transitions, 17020 flow [2024-02-07 19:13:19,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:19,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:19,097 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] [2024-02-07 19:13:19,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-02-07 19:13:19,097 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:19,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:19,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1772247910, now seen corresponding path program 10 times [2024-02-07 19:13:19,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:19,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18521717] [2024-02-07 19:13:19,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:19,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:19,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18521717] [2024-02-07 19:13:19,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18521717] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:19,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345284375] [2024-02-07 19:13:19,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:13:19,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:19,197 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:19,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-07 19:13:19,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:13:19,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:19,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:13:19,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:19,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:19,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345284375] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:19,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:19,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 19:13:19,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432918124] [2024-02-07 19:13:19,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:19,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:13:19,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:19,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:13:19,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:13:19,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:13:19,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 645 transitions, 17020 flow. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 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) [2024-02-07 19:13:19,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:19,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:13:19,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:21,312 INFO L124 PetriNetUnfolderBase]: 4715/7357 cut-off events. [2024-02-07 19:13:21,312 INFO L125 PetriNetUnfolderBase]: For 210648/210648 co-relation queries the response was YES. [2024-02-07 19:13:21,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71084 conditions, 7357 events. 4715/7357 cut-off events. For 210648/210648 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 43731 event pairs, 1320 based on Foata normal form. 30/7387 useless extension candidates. Maximal degree in co-relation 70969. Up to 6659 conditions per place. [2024-02-07 19:13:21,400 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 561 selfloop transitions, 161 changer transitions 0/723 dead transitions. [2024-02-07 19:13:21,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 723 transitions, 19479 flow [2024-02-07 19:13:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:13:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:13:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-02-07 19:13:21,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2024-02-07 19:13:21,408 INFO L175 Difference]: Start difference. First operand has 282 places, 645 transitions, 17020 flow. Second operand 12 states and 148 transitions. [2024-02-07 19:13:21,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 723 transitions, 19479 flow [2024-02-07 19:13:22,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 723 transitions, 19236 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 19:13:22,698 INFO L231 Difference]: Finished difference. Result has 295 places, 682 transitions, 18027 flow [2024-02-07 19:13:22,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16789, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18027, PETRI_PLACES=295, PETRI_TRANSITIONS=682} [2024-02-07 19:13:22,700 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 263 predicate places. [2024-02-07 19:13:22,700 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 682 transitions, 18027 flow [2024-02-07 19:13:22,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 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) [2024-02-07 19:13:22,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:22,707 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] [2024-02-07 19:13:22,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:22,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-02-07 19:13:22,919 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:22,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash 857083448, now seen corresponding path program 11 times [2024-02-07 19:13:22,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:22,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441109037] [2024-02-07 19:13:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:22,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:23,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:23,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441109037] [2024-02-07 19:13:23,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441109037] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:23,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:23,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:23,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585169592] [2024-02-07 19:13:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:23,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:23,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:23,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:23,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:23,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:23,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 682 transitions, 18027 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:23,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:23,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:23,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:24,743 INFO L124 PetriNetUnfolderBase]: 4714/7360 cut-off events. [2024-02-07 19:13:24,743 INFO L125 PetriNetUnfolderBase]: For 237033/237033 co-relation queries the response was YES. [2024-02-07 19:13:24,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74676 conditions, 7360 events. 4714/7360 cut-off events. For 237033/237033 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 43852 event pairs, 1361 based on Foata normal form. 4/7364 useless extension candidates. Maximal degree in co-relation 74555. Up to 6795 conditions per place. [2024-02-07 19:13:24,825 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 581 selfloop transitions, 115 changer transitions 4/701 dead transitions. [2024-02-07 19:13:24,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 701 transitions, 19569 flow [2024-02-07 19:13:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-02-07 19:13:24,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4729064039408867 [2024-02-07 19:13:24,826 INFO L175 Difference]: Start difference. First operand has 295 places, 682 transitions, 18027 flow. Second operand 7 states and 96 transitions. [2024-02-07 19:13:24,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 701 transitions, 19569 flow [2024-02-07 19:13:26,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 701 transitions, 19295 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-02-07 19:13:26,165 INFO L231 Difference]: Finished difference. Result has 298 places, 681 transitions, 17951 flow [2024-02-07 19:13:26,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17753, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17951, PETRI_PLACES=298, PETRI_TRANSITIONS=681} [2024-02-07 19:13:26,166 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 266 predicate places. [2024-02-07 19:13:26,166 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 681 transitions, 17951 flow [2024-02-07 19:13:26,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:26,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:26,166 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] [2024-02-07 19:13:26,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-02-07 19:13:26,167 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:26,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:26,167 INFO L85 PathProgramCache]: Analyzing trace with hash 799927368, now seen corresponding path program 12 times [2024-02-07 19:13:26,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:26,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365512602] [2024-02-07 19:13:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:26,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:26,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:26,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365512602] [2024-02-07 19:13:26,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365512602] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:26,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:26,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:26,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472126323] [2024-02-07 19:13:26,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:26,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:26,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:26,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:26,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 681 transitions, 17951 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:26,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:26,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:26,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:28,080 INFO L124 PetriNetUnfolderBase]: 4712/7358 cut-off events. [2024-02-07 19:13:28,081 INFO L125 PetriNetUnfolderBase]: For 235467/235467 co-relation queries the response was YES. [2024-02-07 19:13:28,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74428 conditions, 7358 events. 4712/7358 cut-off events. For 235467/235467 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 43869 event pairs, 1358 based on Foata normal form. 4/7362 useless extension candidates. Maximal degree in co-relation 74306. Up to 6786 conditions per place. [2024-02-07 19:13:28,165 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 580 selfloop transitions, 117 changer transitions 4/702 dead transitions. [2024-02-07 19:13:28,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 702 transitions, 19500 flow [2024-02-07 19:13:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-02-07 19:13:28,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-02-07 19:13:28,166 INFO L175 Difference]: Start difference. First operand has 298 places, 681 transitions, 17951 flow. Second operand 7 states and 98 transitions. [2024-02-07 19:13:28,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 702 transitions, 19500 flow [2024-02-07 19:13:29,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 702 transitions, 19259 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-02-07 19:13:29,343 INFO L231 Difference]: Finished difference. Result has 297 places, 680 transitions, 17941 flow [2024-02-07 19:13:29,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17710, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17941, PETRI_PLACES=297, PETRI_TRANSITIONS=680} [2024-02-07 19:13:29,345 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 265 predicate places. [2024-02-07 19:13:29,345 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 680 transitions, 17941 flow [2024-02-07 19:13:29,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:29,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:29,345 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] [2024-02-07 19:13:29,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-02-07 19:13:29,346 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:29,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1713015846, now seen corresponding path program 13 times [2024-02-07 19:13:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:29,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165260924] [2024-02-07 19:13:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:29,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:29,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:29,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165260924] [2024-02-07 19:13:29,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165260924] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:29,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:29,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:29,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76397939] [2024-02-07 19:13:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:29,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:29,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:29,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:29,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 680 transitions, 17941 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:29,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:29,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:29,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:31,329 INFO L124 PetriNetUnfolderBase]: 4759/7425 cut-off events. [2024-02-07 19:13:31,329 INFO L125 PetriNetUnfolderBase]: For 237979/237979 co-relation queries the response was YES. [2024-02-07 19:13:31,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75074 conditions, 7425 events. 4759/7425 cut-off events. For 237979/237979 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 44255 event pairs, 1355 based on Foata normal form. 10/7435 useless extension candidates. Maximal degree in co-relation 74952. Up to 6815 conditions per place. [2024-02-07 19:13:31,417 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 591 selfloop transitions, 127 changer transitions 0/719 dead transitions. [2024-02-07 19:13:31,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 719 transitions, 19916 flow [2024-02-07 19:13:31,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:31,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-02-07 19:13:31,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123152709359606 [2024-02-07 19:13:31,418 INFO L175 Difference]: Start difference. First operand has 297 places, 680 transitions, 17941 flow. Second operand 7 states and 104 transitions. [2024-02-07 19:13:31,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 719 transitions, 19916 flow [2024-02-07 19:13:32,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 719 transitions, 19672 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-02-07 19:13:32,698 INFO L231 Difference]: Finished difference. Result has 298 places, 692 transitions, 18298 flow [2024-02-07 19:13:32,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17705, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18298, PETRI_PLACES=298, PETRI_TRANSITIONS=692} [2024-02-07 19:13:32,699 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 266 predicate places. [2024-02-07 19:13:32,699 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 692 transitions, 18298 flow [2024-02-07 19:13:32,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:32,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:32,699 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] [2024-02-07 19:13:32,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-02-07 19:13:32,700 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:32,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:32,700 INFO L85 PathProgramCache]: Analyzing trace with hash -65582434, now seen corresponding path program 14 times [2024-02-07 19:13:32,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:32,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108938608] [2024-02-07 19:13:32,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:32,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:32,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:32,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108938608] [2024-02-07 19:13:32,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108938608] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:32,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:32,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:32,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663167307] [2024-02-07 19:13:32,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:32,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:32,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:32,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:32,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:32,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:13:32,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 692 transitions, 18298 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:13:32,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:32,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:13:32,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:34,788 INFO L124 PetriNetUnfolderBase]: 4765/7435 cut-off events. [2024-02-07 19:13:34,789 INFO L125 PetriNetUnfolderBase]: For 244192/244192 co-relation queries the response was YES. [2024-02-07 19:13:34,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75719 conditions, 7435 events. 4765/7435 cut-off events. For 244192/244192 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 44311 event pairs, 1359 based on Foata normal form. 4/7439 useless extension candidates. Maximal degree in co-relation 75596. Up to 6855 conditions per place. [2024-02-07 19:13:34,880 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 591 selfloop transitions, 120 changer transitions 0/712 dead transitions. [2024-02-07 19:13:34,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 712 transitions, 19925 flow [2024-02-07 19:13:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:34,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-02-07 19:13:34,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43842364532019706 [2024-02-07 19:13:34,882 INFO L175 Difference]: Start difference. First operand has 298 places, 692 transitions, 18298 flow. Second operand 7 states and 89 transitions. [2024-02-07 19:13:34,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 712 transitions, 19925 flow [2024-02-07 19:13:36,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 712 transitions, 19759 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-02-07 19:13:36,187 INFO L231 Difference]: Finished difference. Result has 301 places, 693 transitions, 18404 flow [2024-02-07 19:13:36,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18133, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18404, PETRI_PLACES=301, PETRI_TRANSITIONS=693} [2024-02-07 19:13:36,204 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 269 predicate places. [2024-02-07 19:13:36,204 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 693 transitions, 18404 flow [2024-02-07 19:13:36,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:13:36,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:36,204 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] [2024-02-07 19:13:36,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-02-07 19:13:36,204 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:36,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash 820215846, now seen corresponding path program 15 times [2024-02-07 19:13:36,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:36,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814393349] [2024-02-07 19:13:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:36,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814393349] [2024-02-07 19:13:36,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814393349] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:36,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:36,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:36,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626791099] [2024-02-07 19:13:36,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:36,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:36,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:36,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:36,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:36,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:36,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 693 transitions, 18404 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:36,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:36,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:36,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:38,134 INFO L124 PetriNetUnfolderBase]: 4771/7445 cut-off events. [2024-02-07 19:13:38,134 INFO L125 PetriNetUnfolderBase]: For 248362/248362 co-relation queries the response was YES. [2024-02-07 19:13:38,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75863 conditions, 7445 events. 4771/7445 cut-off events. For 248362/248362 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 44375 event pairs, 1365 based on Foata normal form. 4/7449 useless extension candidates. Maximal degree in co-relation 75740. Up to 6859 conditions per place. [2024-02-07 19:13:38,230 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 589 selfloop transitions, 125 changer transitions 0/715 dead transitions. [2024-02-07 19:13:38,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 715 transitions, 20065 flow [2024-02-07 19:13:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-02-07 19:13:38,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49261083743842365 [2024-02-07 19:13:38,231 INFO L175 Difference]: Start difference. First operand has 301 places, 693 transitions, 18404 flow. Second operand 7 states and 100 transitions. [2024-02-07 19:13:38,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 715 transitions, 20065 flow [2024-02-07 19:13:39,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 715 transitions, 19928 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 19:13:39,652 INFO L231 Difference]: Finished difference. Result has 303 places, 694 transitions, 18550 flow [2024-02-07 19:13:39,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18268, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18550, PETRI_PLACES=303, PETRI_TRANSITIONS=694} [2024-02-07 19:13:39,653 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 271 predicate places. [2024-02-07 19:13:39,653 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 694 transitions, 18550 flow [2024-02-07 19:13:39,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:39,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:39,654 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] [2024-02-07 19:13:39,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-02-07 19:13:39,654 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:39,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1547671825, now seen corresponding path program 24 times [2024-02-07 19:13:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:39,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959900963] [2024-02-07 19:13:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:39,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:39,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959900963] [2024-02-07 19:13:39,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959900963] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:39,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:39,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:39,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173560963] [2024-02-07 19:13:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:39,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:39,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:39,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:39,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:39,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:39,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 694 transitions, 18550 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:39,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:39,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:39,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:41,612 INFO L124 PetriNetUnfolderBase]: 4806/7500 cut-off events. [2024-02-07 19:13:41,612 INFO L125 PetriNetUnfolderBase]: For 252489/252489 co-relation queries the response was YES. [2024-02-07 19:13:41,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76503 conditions, 7500 events. 4806/7500 cut-off events. For 252489/252489 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 44768 event pairs, 1366 based on Foata normal form. 16/7516 useless extension candidates. Maximal degree in co-relation 76380. Up to 6878 conditions per place. [2024-02-07 19:13:41,697 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 598 selfloop transitions, 133 changer transitions 0/732 dead transitions. [2024-02-07 19:13:41,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 732 transitions, 20479 flow [2024-02-07 19:13:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-02-07 19:13:41,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221674876847291 [2024-02-07 19:13:41,699 INFO L175 Difference]: Start difference. First operand has 303 places, 694 transitions, 18550 flow. Second operand 7 states and 106 transitions. [2024-02-07 19:13:41,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 732 transitions, 20479 flow [2024-02-07 19:13:43,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 732 transitions, 20135 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 19:13:43,106 INFO L231 Difference]: Finished difference. Result has 305 places, 704 transitions, 18738 flow [2024-02-07 19:13:43,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18206, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18738, PETRI_PLACES=305, PETRI_TRANSITIONS=704} [2024-02-07 19:13:43,107 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 273 predicate places. [2024-02-07 19:13:43,107 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 704 transitions, 18738 flow [2024-02-07 19:13:43,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:43,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:43,107 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] [2024-02-07 19:13:43,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-02-07 19:13:43,108 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:43,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:43,108 INFO L85 PathProgramCache]: Analyzing trace with hash -684220023, now seen corresponding path program 25 times [2024-02-07 19:13:43,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:43,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69589053] [2024-02-07 19:13:43,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:43,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:43,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:43,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69589053] [2024-02-07 19:13:43,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69589053] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:43,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:43,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:43,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117562881] [2024-02-07 19:13:43,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:43,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:43,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:43,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:43,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:43,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:43,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 704 transitions, 18738 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:43,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:43,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:43,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:45,077 INFO L124 PetriNetUnfolderBase]: 4799/7486 cut-off events. [2024-02-07 19:13:45,078 INFO L125 PetriNetUnfolderBase]: For 252678/252678 co-relation queries the response was YES. [2024-02-07 19:13:45,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76583 conditions, 7486 events. 4799/7486 cut-off events. For 252678/252678 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 44739 event pairs, 1355 based on Foata normal form. 12/7498 useless extension candidates. Maximal degree in co-relation 76458. Up to 6869 conditions per place. [2024-02-07 19:13:45,173 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 598 selfloop transitions, 133 changer transitions 0/732 dead transitions. [2024-02-07 19:13:45,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 732 transitions, 20491 flow [2024-02-07 19:13:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-02-07 19:13:45,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123152709359606 [2024-02-07 19:13:45,174 INFO L175 Difference]: Start difference. First operand has 305 places, 704 transitions, 18738 flow. Second operand 7 states and 104 transitions. [2024-02-07 19:13:45,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 732 transitions, 20491 flow [2024-02-07 19:13:46,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 732 transitions, 20208 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-02-07 19:13:46,711 INFO L231 Difference]: Finished difference. Result has 308 places, 705 transitions, 18762 flow [2024-02-07 19:13:46,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18455, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18762, PETRI_PLACES=308, PETRI_TRANSITIONS=705} [2024-02-07 19:13:46,712 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 276 predicate places. [2024-02-07 19:13:46,712 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 705 transitions, 18762 flow [2024-02-07 19:13:46,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:46,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:46,712 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] [2024-02-07 19:13:46,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-02-07 19:13:46,713 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:46,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:46,713 INFO L85 PathProgramCache]: Analyzing trace with hash 2053628001, now seen corresponding path program 6 times [2024-02-07 19:13:46,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:46,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099887416] [2024-02-07 19:13:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:46,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:46,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099887416] [2024-02-07 19:13:46,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099887416] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795953917] [2024-02-07 19:13:46,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:13:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:46,808 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:46,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-07 19:13:46,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 19:13:46,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:46,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 19:13:46,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:47,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:47,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795953917] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:47,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:47,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 15 [2024-02-07 19:13:47,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014689323] [2024-02-07 19:13:47,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:47,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 19:13:47,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 19:13:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-02-07 19:13:47,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:13:47,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 705 transitions, 18762 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-02-07 19:13:47,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:47,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:13:47,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:49,681 INFO L124 PetriNetUnfolderBase]: 4857/7572 cut-off events. [2024-02-07 19:13:49,681 INFO L125 PetriNetUnfolderBase]: For 254943/254943 co-relation queries the response was YES. [2024-02-07 19:13:49,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77582 conditions, 7572 events. 4857/7572 cut-off events. For 254943/254943 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 45174 event pairs, 1403 based on Foata normal form. 8/7580 useless extension candidates. Maximal degree in co-relation 77456. Up to 6928 conditions per place. [2024-02-07 19:13:49,933 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 606 selfloop transitions, 134 changer transitions 0/741 dead transitions. [2024-02-07 19:13:49,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 741 transitions, 20757 flow [2024-02-07 19:13:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:13:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:13:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-02-07 19:13:49,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2024-02-07 19:13:49,935 INFO L175 Difference]: Start difference. First operand has 308 places, 705 transitions, 18762 flow. Second operand 9 states and 107 transitions. [2024-02-07 19:13:49,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 741 transitions, 20757 flow [2024-02-07 19:13:51,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 741 transitions, 20484 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-02-07 19:13:51,217 INFO L231 Difference]: Finished difference. Result has 314 places, 714 transitions, 19032 flow [2024-02-07 19:13:51,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18501, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19032, PETRI_PLACES=314, PETRI_TRANSITIONS=714} [2024-02-07 19:13:51,218 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 282 predicate places. [2024-02-07 19:13:51,218 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 714 transitions, 19032 flow [2024-02-07 19:13:51,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 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) [2024-02-07 19:13:51,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:51,219 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] [2024-02-07 19:13:51,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:51,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:51,438 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:51,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:51,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1601527615, now seen corresponding path program 26 times [2024-02-07 19:13:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:51,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726828545] [2024-02-07 19:13:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:51,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:51,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:51,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:51,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726828545] [2024-02-07 19:13:51,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726828545] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:51,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:51,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675554762] [2024-02-07 19:13:51,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:51,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:51,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:51,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:13:51,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 714 transitions, 19032 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:13:51,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:51,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:13:51,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:53,691 INFO L124 PetriNetUnfolderBase]: 4867/7590 cut-off events. [2024-02-07 19:13:53,691 INFO L125 PetriNetUnfolderBase]: For 254349/254349 co-relation queries the response was YES. [2024-02-07 19:13:53,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77986 conditions, 7590 events. 4867/7590 cut-off events. For 254349/254349 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 45442 event pairs, 1383 based on Foata normal form. 8/7598 useless extension candidates. Maximal degree in co-relation 77858. Up to 6967 conditions per place. [2024-02-07 19:13:53,770 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 608 selfloop transitions, 130 changer transitions 0/739 dead transitions. [2024-02-07 19:13:53,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 739 transitions, 20752 flow [2024-02-07 19:13:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-02-07 19:13:53,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458128078817734 [2024-02-07 19:13:53,772 INFO L175 Difference]: Start difference. First operand has 314 places, 714 transitions, 19032 flow. Second operand 7 states and 93 transitions. [2024-02-07 19:13:53,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 739 transitions, 20752 flow [2024-02-07 19:13:55,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 739 transitions, 20620 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-02-07 19:13:55,110 INFO L231 Difference]: Finished difference. Result has 317 places, 716 transitions, 19226 flow [2024-02-07 19:13:55,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18900, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19226, PETRI_PLACES=317, PETRI_TRANSITIONS=716} [2024-02-07 19:13:55,111 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 285 predicate places. [2024-02-07 19:13:55,111 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 716 transitions, 19226 flow [2024-02-07 19:13:55,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:13:55,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:55,111 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] [2024-02-07 19:13:55,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-02-07 19:13:55,112 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:55,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:55,112 INFO L85 PathProgramCache]: Analyzing trace with hash 477121182, now seen corresponding path program 16 times [2024-02-07 19:13:55,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:55,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520148387] [2024-02-07 19:13:55,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:55,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:55,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:55,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520148387] [2024-02-07 19:13:55,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520148387] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:13:55,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:13:55,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:13:55,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866004367] [2024-02-07 19:13:55,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:13:55,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:13:55,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:13:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:13:55,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:55,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 716 transitions, 19226 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:55,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:55,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:55,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:57,421 INFO L124 PetriNetUnfolderBase]: 4874/7646 cut-off events. [2024-02-07 19:13:57,421 INFO L125 PetriNetUnfolderBase]: For 264042/264042 co-relation queries the response was YES. [2024-02-07 19:13:57,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78435 conditions, 7646 events. 4874/7646 cut-off events. For 264042/264042 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46220 event pairs, 1439 based on Foata normal form. 20/7666 useless extension candidates. Maximal degree in co-relation 78306. Up to 6962 conditions per place. [2024-02-07 19:13:57,520 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 594 selfloop transitions, 141 changer transitions 9/745 dead transitions. [2024-02-07 19:13:57,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 745 transitions, 20964 flow [2024-02-07 19:13:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:13:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:13:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-02-07 19:13:57,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876847290640394 [2024-02-07 19:13:57,522 INFO L175 Difference]: Start difference. First operand has 317 places, 716 transitions, 19226 flow. Second operand 7 states and 99 transitions. [2024-02-07 19:13:57,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 745 transitions, 20964 flow [2024-02-07 19:13:58,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 745 transitions, 20699 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-02-07 19:13:58,934 INFO L231 Difference]: Finished difference. Result has 320 places, 712 transitions, 19109 flow [2024-02-07 19:13:58,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18961, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19109, PETRI_PLACES=320, PETRI_TRANSITIONS=712} [2024-02-07 19:13:58,934 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 288 predicate places. [2024-02-07 19:13:58,934 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 712 transitions, 19109 flow [2024-02-07 19:13:58,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:13:58,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:58,935 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] [2024-02-07 19:13:58,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-02-07 19:13:58,935 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:58,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1325484371, now seen corresponding path program 27 times [2024-02-07 19:13:58,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:58,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512001538] [2024-02-07 19:13:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:58,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:59,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:59,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512001538] [2024-02-07 19:13:59,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512001538] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:59,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902070907] [2024-02-07 19:13:59,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:13:59,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:59,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:59,086 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:59,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-02-07 19:13:59,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 19:13:59,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:59,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:13:59,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:59,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:59,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902070907] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:59,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:59,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 11 [2024-02-07 19:13:59,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753260983] [2024-02-07 19:13:59,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:59,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:13:59,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:59,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:13:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:13:59,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:13:59,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 712 transitions, 19109 flow. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2024-02-07 19:13:59,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:59,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:13:59,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:01,992 INFO L124 PetriNetUnfolderBase]: 5505/8685 cut-off events. [2024-02-07 19:14:01,992 INFO L125 PetriNetUnfolderBase]: For 288000/288000 co-relation queries the response was YES. [2024-02-07 19:14:02,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88962 conditions, 8685 events. 5505/8685 cut-off events. For 288000/288000 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 54185 event pairs, 806 based on Foata normal form. 10/8695 useless extension candidates. Maximal degree in co-relation 88831. Up to 3272 conditions per place. [2024-02-07 19:14:02,083 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 386 selfloop transitions, 587 changer transitions 0/974 dead transitions. [2024-02-07 19:14:02,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 974 transitions, 26205 flow [2024-02-07 19:14:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 19:14:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 19:14:02,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 236 transitions. [2024-02-07 19:14:02,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4787018255578093 [2024-02-07 19:14:02,085 INFO L175 Difference]: Start difference. First operand has 320 places, 712 transitions, 19109 flow. Second operand 17 states and 236 transitions. [2024-02-07 19:14:02,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 974 transitions, 26205 flow [2024-02-07 19:14:03,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 974 transitions, 25911 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-02-07 19:14:03,791 INFO L231 Difference]: Finished difference. Result has 337 places, 842 transitions, 24441 flow [2024-02-07 19:14:03,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18781, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=24441, PETRI_PLACES=337, PETRI_TRANSITIONS=842} [2024-02-07 19:14:03,792 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 305 predicate places. [2024-02-07 19:14:03,792 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 842 transitions, 24441 flow [2024-02-07 19:14:03,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 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) [2024-02-07 19:14:03,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:03,792 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] [2024-02-07 19:14:03,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-02-07 19:14:04,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:04,046 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:04,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:04,047 INFO L85 PathProgramCache]: Analyzing trace with hash -786585582, now seen corresponding path program 17 times [2024-02-07 19:14:04,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:04,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630871686] [2024-02-07 19:14:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:04,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:04,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:04,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630871686] [2024-02-07 19:14:04,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630871686] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:04,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:04,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:14:04,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69191220] [2024-02-07 19:14:04,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:04,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:14:04,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:04,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:14:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:14:04,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:14:04,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 842 transitions, 24441 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:14:04,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:04,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:14:04,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:07,002 INFO L124 PetriNetUnfolderBase]: 5515/8774 cut-off events. [2024-02-07 19:14:07,003 INFO L125 PetriNetUnfolderBase]: For 358010/358010 co-relation queries the response was YES. [2024-02-07 19:14:07,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95767 conditions, 8774 events. 5515/8774 cut-off events. For 358010/358010 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 55510 event pairs, 1517 based on Foata normal form. 32/8806 useless extension candidates. Maximal degree in co-relation 95630. Up to 7700 conditions per place. [2024-02-07 19:14:07,115 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 698 selfloop transitions, 169 changer transitions 7/875 dead transitions. [2024-02-07 19:14:07,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 875 transitions, 26463 flow [2024-02-07 19:14:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:14:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:14:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-02-07 19:14:07,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073891625615764 [2024-02-07 19:14:07,117 INFO L175 Difference]: Start difference. First operand has 337 places, 842 transitions, 24441 flow. Second operand 7 states and 103 transitions. [2024-02-07 19:14:07,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 875 transitions, 26463 flow [2024-02-07 19:14:09,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 875 transitions, 25903 flow, removed 132 selfloop flow, removed 4 redundant places. [2024-02-07 19:14:09,419 INFO L231 Difference]: Finished difference. Result has 341 places, 840 transitions, 24214 flow [2024-02-07 19:14:09,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23881, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24214, PETRI_PLACES=341, PETRI_TRANSITIONS=840} [2024-02-07 19:14:09,420 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 309 predicate places. [2024-02-07 19:14:09,420 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 840 transitions, 24214 flow [2024-02-07 19:14:09,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:14:09,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:09,421 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] [2024-02-07 19:14:09,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-02-07 19:14:09,421 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:09,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:09,421 INFO L85 PathProgramCache]: Analyzing trace with hash -702049288, now seen corresponding path program 18 times [2024-02-07 19:14:09,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:09,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714826881] [2024-02-07 19:14:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:09,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:09,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:09,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714826881] [2024-02-07 19:14:09,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714826881] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:09,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:09,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:14:09,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224334325] [2024-02-07 19:14:09,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:09,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:14:09,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:09,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:14:09,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:14:09,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:14:09,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 840 transitions, 24214 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:14:09,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:09,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:14:09,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:12,403 INFO L124 PetriNetUnfolderBase]: 5491/8727 cut-off events. [2024-02-07 19:14:12,403 INFO L125 PetriNetUnfolderBase]: For 354141/354141 co-relation queries the response was YES. [2024-02-07 19:14:12,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94274 conditions, 8727 events. 5491/8727 cut-off events. For 354141/354141 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 55066 event pairs, 1607 based on Foata normal form. 4/8731 useless extension candidates. Maximal degree in co-relation 94136. Up to 8093 conditions per place. [2024-02-07 19:14:12,523 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 713 selfloop transitions, 144 changer transitions 0/858 dead transitions. [2024-02-07 19:14:12,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 858 transitions, 26132 flow [2024-02-07 19:14:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:14:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:14:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-02-07 19:14:12,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-02-07 19:14:12,524 INFO L175 Difference]: Start difference. First operand has 341 places, 840 transitions, 24214 flow. Second operand 7 states and 87 transitions. [2024-02-07 19:14:12,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 858 transitions, 26132 flow [2024-02-07 19:14:14,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 858 transitions, 25781 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-02-07 19:14:14,713 INFO L231 Difference]: Finished difference. Result has 341 places, 841 transitions, 24193 flow [2024-02-07 19:14:14,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23873, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24193, PETRI_PLACES=341, PETRI_TRANSITIONS=841} [2024-02-07 19:14:14,714 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 309 predicate places. [2024-02-07 19:14:14,714 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 841 transitions, 24193 flow [2024-02-07 19:14:14,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:14:14,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:14,715 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] [2024-02-07 19:14:14,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-02-07 19:14:14,715 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:14,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1539422396, now seen corresponding path program 19 times [2024-02-07 19:14:14,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:14,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325866224] [2024-02-07 19:14:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:14,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:14,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:14,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325866224] [2024-02-07 19:14:14,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325866224] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:14,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57024180] [2024-02-07 19:14:14,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:14:14,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:14,853 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:14,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-02-07 19:14:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:14,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 19:14:14,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:15,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57024180] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:15,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:15,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 19:14:15,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503641593] [2024-02-07 19:14:15,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:15,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:14:15,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:14:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:14:15,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:14:15,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 841 transitions, 24193 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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) [2024-02-07 19:14:15,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:15,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:14:15,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:17,981 INFO L124 PetriNetUnfolderBase]: 5532/8795 cut-off events. [2024-02-07 19:14:17,981 INFO L125 PetriNetUnfolderBase]: For 328612/328612 co-relation queries the response was YES. [2024-02-07 19:14:18,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92333 conditions, 8795 events. 5532/8795 cut-off events. For 328612/328612 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 55697 event pairs, 1535 based on Foata normal form. 20/8815 useless extension candidates. Maximal degree in co-relation 92196. Up to 7914 conditions per place. [2024-02-07 19:14:18,072 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 704 selfloop transitions, 185 changer transitions 0/890 dead transitions. [2024-02-07 19:14:18,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 890 transitions, 26454 flow [2024-02-07 19:14:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:14:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:14:18,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-02-07 19:14:18,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169278996865204 [2024-02-07 19:14:18,074 INFO L175 Difference]: Start difference. First operand has 341 places, 841 transitions, 24193 flow. Second operand 11 states and 133 transitions. [2024-02-07 19:14:18,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 890 transitions, 26454 flow [2024-02-07 19:14:20,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 890 transitions, 26166 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-02-07 19:14:20,054 INFO L231 Difference]: Finished difference. Result has 350 places, 853 transitions, 24615 flow [2024-02-07 19:14:20,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23905, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=24615, PETRI_PLACES=350, PETRI_TRANSITIONS=853} [2024-02-07 19:14:20,055 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 318 predicate places. [2024-02-07 19:14:20,055 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 853 transitions, 24615 flow [2024-02-07 19:14:20,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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) [2024-02-07 19:14:20,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:20,055 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] [2024-02-07 19:14:20,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-02-07 19:14:20,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-02-07 19:14:20,266 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:20,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:20,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1116936670, now seen corresponding path program 20 times [2024-02-07 19:14:20,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:20,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134140353] [2024-02-07 19:14:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:20,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:20,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:20,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134140353] [2024-02-07 19:14:20,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134140353] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:20,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743977470] [2024-02-07 19:14:20,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:14:20,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:20,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:20,350 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:20,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-02-07 19:14:20,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:14:20,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:14:20,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:14:20,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:20,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:20,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743977470] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:20,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:20,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 19:14:20,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840318938] [2024-02-07 19:14:20,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:20,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:14:20,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:20,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:14:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:14:20,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:14:20,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 853 transitions, 24615 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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) [2024-02-07 19:14:20,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:20,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:14:20,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:23,724 INFO L124 PetriNetUnfolderBase]: 5520/8770 cut-off events. [2024-02-07 19:14:23,724 INFO L125 PetriNetUnfolderBase]: For 331453/331453 co-relation queries the response was YES. [2024-02-07 19:14:23,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93399 conditions, 8770 events. 5520/8770 cut-off events. For 331453/331453 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 55431 event pairs, 1517 based on Foata normal form. 10/8780 useless extension candidates. Maximal degree in co-relation 93258. Up to 7814 conditions per place. [2024-02-07 19:14:23,834 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 693 selfloop transitions, 186 changer transitions 0/880 dead transitions. [2024-02-07 19:14:23,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 880 transitions, 26572 flow [2024-02-07 19:14:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:14:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:14:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-02-07 19:14:23,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2024-02-07 19:14:23,835 INFO L175 Difference]: Start difference. First operand has 350 places, 853 transitions, 24615 flow. Second operand 8 states and 100 transitions. [2024-02-07 19:14:23,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 880 transitions, 26572 flow [2024-02-07 19:14:25,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 880 transitions, 26222 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-02-07 19:14:25,929 INFO L231 Difference]: Finished difference. Result has 352 places, 853 transitions, 24637 flow [2024-02-07 19:14:25,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24265, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24637, PETRI_PLACES=352, PETRI_TRANSITIONS=853} [2024-02-07 19:14:25,930 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 320 predicate places. [2024-02-07 19:14:25,930 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 853 transitions, 24637 flow [2024-02-07 19:14:25,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 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) [2024-02-07 19:14:25,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:25,930 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] [2024-02-07 19:14:25,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-02-07 19:14:26,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-02-07 19:14:26,134 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:26,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:26,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1480489378, now seen corresponding path program 21 times [2024-02-07 19:14:26,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:26,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058329205] [2024-02-07 19:14:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:26,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:26,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:26,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058329205] [2024-02-07 19:14:26,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058329205] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:26,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:26,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:14:26,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674477820] [2024-02-07 19:14:26,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:26,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:14:26,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:14:26,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:14:26,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:14:26,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 853 transitions, 24637 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:14:26,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:26,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:14:26,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:28,973 INFO L124 PetriNetUnfolderBase]: 5538/8800 cut-off events. [2024-02-07 19:14:28,974 INFO L125 PetriNetUnfolderBase]: For 339108/339108 co-relation queries the response was YES. [2024-02-07 19:14:29,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93677 conditions, 8800 events. 5538/8800 cut-off events. For 339108/339108 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 55644 event pairs, 1600 based on Foata normal form. 4/8804 useless extension candidates. Maximal degree in co-relation 93536. Up to 8150 conditions per place. [2024-02-07 19:14:29,068 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 725 selfloop transitions, 150 changer transitions 0/876 dead transitions. [2024-02-07 19:14:29,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 876 transitions, 26711 flow [2024-02-07 19:14:29,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:14:29,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:14:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-02-07 19:14:29,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2024-02-07 19:14:29,070 INFO L175 Difference]: Start difference. First operand has 352 places, 853 transitions, 24637 flow. Second operand 7 states and 86 transitions. [2024-02-07 19:14:29,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 876 transitions, 26711 flow [2024-02-07 19:14:31,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 876 transitions, 26317 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-02-07 19:14:31,120 INFO L231 Difference]: Finished difference. Result has 351 places, 857 transitions, 24697 flow [2024-02-07 19:14:31,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24249, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24697, PETRI_PLACES=351, PETRI_TRANSITIONS=857} [2024-02-07 19:14:31,121 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 319 predicate places. [2024-02-07 19:14:31,121 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 857 transitions, 24697 flow [2024-02-07 19:14:31,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:14:31,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:31,122 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] [2024-02-07 19:14:31,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-02-07 19:14:31,122 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:31,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:31,122 INFO L85 PathProgramCache]: Analyzing trace with hash -544320678, now seen corresponding path program 22 times [2024-02-07 19:14:31,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:31,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573574515] [2024-02-07 19:14:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:31,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:31,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:31,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573574515] [2024-02-07 19:14:31,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573574515] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:31,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:31,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:14:31,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511472330] [2024-02-07 19:14:31,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:31,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:14:31,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:14:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:14:31,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:14:31,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 857 transitions, 24697 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:14:31,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:31,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:14:31,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:34,004 INFO L124 PetriNetUnfolderBase]: 5571/8850 cut-off events. [2024-02-07 19:14:34,004 INFO L125 PetriNetUnfolderBase]: For 341077/341077 co-relation queries the response was YES. [2024-02-07 19:14:34,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94175 conditions, 8850 events. 5571/8850 cut-off events. For 341077/341077 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 55987 event pairs, 1587 based on Foata normal form. 20/8870 useless extension candidates. Maximal degree in co-relation 94036. Up to 8035 conditions per place. [2024-02-07 19:14:34,124 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 720 selfloop transitions, 175 changer transitions 0/896 dead transitions. [2024-02-07 19:14:34,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 896 transitions, 27143 flow [2024-02-07 19:14:34,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:14:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:14:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-02-07 19:14:34,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024630541871922 [2024-02-07 19:14:34,125 INFO L175 Difference]: Start difference. First operand has 351 places, 857 transitions, 24697 flow. Second operand 7 states and 102 transitions. [2024-02-07 19:14:34,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 896 transitions, 27143 flow [2024-02-07 19:14:36,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 896 transitions, 26823 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-02-07 19:14:36,462 INFO L231 Difference]: Finished difference. Result has 354 places, 871 transitions, 25242 flow [2024-02-07 19:14:36,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24393, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=25242, PETRI_PLACES=354, PETRI_TRANSITIONS=871} [2024-02-07 19:14:36,463 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 322 predicate places. [2024-02-07 19:14:36,463 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 871 transitions, 25242 flow [2024-02-07 19:14:36,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:14:36,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:36,464 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] [2024-02-07 19:14:36,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-02-07 19:14:36,464 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:36,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:36,464 INFO L85 PathProgramCache]: Analyzing trace with hash 183748992, now seen corresponding path program 23 times [2024-02-07 19:14:36,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:36,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500207764] [2024-02-07 19:14:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:36,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:36,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:36,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500207764] [2024-02-07 19:14:36,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500207764] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:36,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:36,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:14:36,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908621494] [2024-02-07 19:14:36,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:36,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:14:36,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:36,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:14:36,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:14:36,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:14:36,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 871 transitions, 25242 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:14:36,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:36,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:14:36,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:39,476 INFO L124 PetriNetUnfolderBase]: 5583/8861 cut-off events. [2024-02-07 19:14:39,476 INFO L125 PetriNetUnfolderBase]: For 344385/344385 co-relation queries the response was YES. [2024-02-07 19:14:39,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94911 conditions, 8861 events. 5583/8861 cut-off events. For 344385/344385 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 56049 event pairs, 1601 based on Foata normal form. 4/8865 useless extension candidates. Maximal degree in co-relation 94770. Up to 8181 conditions per place. [2024-02-07 19:14:39,581 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 731 selfloop transitions, 160 changer transitions 0/892 dead transitions. [2024-02-07 19:14:39,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 892 transitions, 27297 flow [2024-02-07 19:14:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:14:39,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:14:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-02-07 19:14:39,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-02-07 19:14:39,582 INFO L175 Difference]: Start difference. First operand has 354 places, 871 transitions, 25242 flow. Second operand 7 states and 98 transitions. [2024-02-07 19:14:39,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 892 transitions, 27297 flow [2024-02-07 19:14:41,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 892 transitions, 27017 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-02-07 19:14:42,001 INFO L231 Difference]: Finished difference. Result has 356 places, 873 transitions, 25347 flow [2024-02-07 19:14:42,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24930, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=25347, PETRI_PLACES=356, PETRI_TRANSITIONS=873} [2024-02-07 19:14:42,002 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 324 predicate places. [2024-02-07 19:14:42,002 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 873 transitions, 25347 flow [2024-02-07 19:14:42,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:14:42,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:42,002 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] [2024-02-07 19:14:42,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-02-07 19:14:42,003 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:42,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:42,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1343918397, now seen corresponding path program 28 times [2024-02-07 19:14:42,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:42,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785320471] [2024-02-07 19:14:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:42,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:42,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:42,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785320471] [2024-02-07 19:14:42,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785320471] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:42,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984188892] [2024-02-07 19:14:42,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:14:42,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:42,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:42,101 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:42,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-02-07 19:14:42,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:14:42,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:14:42,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:14:42,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:42,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:42,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984188892] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:42,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:42,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 12 [2024-02-07 19:14:42,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055518991] [2024-02-07 19:14:42,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:42,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:14:42,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:42,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:14:42,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:14:42,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:14:42,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 873 transitions, 25347 flow. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 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) [2024-02-07 19:14:42,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:42,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:14:42,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:45,366 INFO L124 PetriNetUnfolderBase]: 5602/8845 cut-off events. [2024-02-07 19:14:45,366 INFO L125 PetriNetUnfolderBase]: For 332853/332853 co-relation queries the response was YES. [2024-02-07 19:14:45,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95011 conditions, 8845 events. 5602/8845 cut-off events. For 332853/332853 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 55522 event pairs, 1115 based on Foata normal form. 16/8861 useless extension candidates. Maximal degree in co-relation 94870. Up to 6188 conditions per place. [2024-02-07 19:14:45,476 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 483 selfloop transitions, 493 changer transitions 0/977 dead transitions. [2024-02-07 19:14:45,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 977 transitions, 28941 flow [2024-02-07 19:14:45,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 19:14:45,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 19:14:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 193 transitions. [2024-02-07 19:14:45,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753694581280788 [2024-02-07 19:14:45,477 INFO L175 Difference]: Start difference. First operand has 356 places, 873 transitions, 25347 flow. Second operand 14 states and 193 transitions. [2024-02-07 19:14:45,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 977 transitions, 28941 flow [2024-02-07 19:14:47,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 977 transitions, 28737 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 19:14:47,911 INFO L231 Difference]: Finished difference. Result has 371 places, 891 transitions, 26858 flow [2024-02-07 19:14:47,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=25143, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=26858, PETRI_PLACES=371, PETRI_TRANSITIONS=891} [2024-02-07 19:14:47,912 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 339 predicate places. [2024-02-07 19:14:47,912 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 891 transitions, 26858 flow [2024-02-07 19:14:47,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 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) [2024-02-07 19:14:47,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:47,912 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] [2024-02-07 19:14:47,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-02-07 19:14:48,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-02-07 19:14:48,127 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:48,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:48,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1320686877, now seen corresponding path program 29 times [2024-02-07 19:14:48,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:48,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128601169] [2024-02-07 19:14:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:48,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:48,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128601169] [2024-02-07 19:14:48,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128601169] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:48,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:48,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:14:48,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461348879] [2024-02-07 19:14:48,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:48,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:14:48,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:48,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:14:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:14:48,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:14:48,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 891 transitions, 26858 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:14:48,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:48,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:14:48,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:51,107 INFO L124 PetriNetUnfolderBase]: 5591/8821 cut-off events. [2024-02-07 19:14:51,108 INFO L125 PetriNetUnfolderBase]: For 360776/360776 co-relation queries the response was YES. [2024-02-07 19:14:51,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97371 conditions, 8821 events. 5591/8821 cut-off events. For 360776/360776 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 55308 event pairs, 1567 based on Foata normal form. 6/8827 useless extension candidates. Maximal degree in co-relation 97224. Up to 8115 conditions per place. [2024-02-07 19:14:51,214 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 745 selfloop transitions, 168 changer transitions 0/914 dead transitions. [2024-02-07 19:14:51,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 914 transitions, 28927 flow [2024-02-07 19:14:51,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:14:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:14:51,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-02-07 19:14:51,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024630541871922 [2024-02-07 19:14:51,215 INFO L175 Difference]: Start difference. First operand has 371 places, 891 transitions, 26858 flow. Second operand 7 states and 102 transitions. [2024-02-07 19:14:51,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 914 transitions, 28927 flow [2024-02-07 19:14:53,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 914 transitions, 28443 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-02-07 19:14:53,560 INFO L231 Difference]: Finished difference. Result has 374 places, 891 transitions, 26745 flow [2024-02-07 19:14:53,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=26339, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26745, PETRI_PLACES=374, PETRI_TRANSITIONS=891} [2024-02-07 19:14:53,561 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 342 predicate places. [2024-02-07 19:14:53,561 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 891 transitions, 26745 flow [2024-02-07 19:14:53,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:14:53,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:53,562 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] [2024-02-07 19:14:53,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-02-07 19:14:53,562 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:53,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:53,562 INFO L85 PathProgramCache]: Analyzing trace with hash -234735387, now seen corresponding path program 7 times [2024-02-07 19:14:53,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:53,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203568596] [2024-02-07 19:14:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:53,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:53,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203568596] [2024-02-07 19:14:53,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203568596] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143403639] [2024-02-07 19:14:53,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:14:53,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:53,644 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:53,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-02-07 19:14:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:53,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:14:53,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:53,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:53,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143403639] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:53,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:53,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 19:14:53,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346317958] [2024-02-07 19:14:53,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:53,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:14:53,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:53,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:14:53,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:14:53,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:14:53,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 891 transitions, 26745 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 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) [2024-02-07 19:14:53,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:53,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:14:53,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:57,311 INFO L124 PetriNetUnfolderBase]: 6197/9703 cut-off events. [2024-02-07 19:14:57,312 INFO L125 PetriNetUnfolderBase]: For 390884/390884 co-relation queries the response was YES. [2024-02-07 19:14:57,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106657 conditions, 9703 events. 6197/9703 cut-off events. For 390884/390884 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 61047 event pairs, 1347 based on Foata normal form. 12/9715 useless extension candidates. Maximal degree in co-relation 106507. Up to 5488 conditions per place. [2024-02-07 19:14:57,440 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 613 selfloop transitions, 404 changer transitions 0/1018 dead transitions. [2024-02-07 19:14:57,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1018 transitions, 31079 flow [2024-02-07 19:14:57,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 19:14:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 19:14:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 184 transitions. [2024-02-07 19:14:57,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42298850574712643 [2024-02-07 19:14:57,448 INFO L175 Difference]: Start difference. First operand has 374 places, 891 transitions, 26745 flow. Second operand 15 states and 184 transitions. [2024-02-07 19:14:57,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1018 transitions, 31079 flow [2024-02-07 19:15:00,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1018 transitions, 30688 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-02-07 19:15:00,321 INFO L231 Difference]: Finished difference. Result has 392 places, 932 transitions, 29062 flow [2024-02-07 19:15:00,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=26392, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=29062, PETRI_PLACES=392, PETRI_TRANSITIONS=932} [2024-02-07 19:15:00,322 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 360 predicate places. [2024-02-07 19:15:00,322 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 932 transitions, 29062 flow [2024-02-07 19:15:00,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 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) [2024-02-07 19:15:00,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:15:00,322 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] [2024-02-07 19:15:00,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-02-07 19:15:00,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:15:00,533 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:15:00,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:15:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2056972827, now seen corresponding path program 30 times [2024-02-07 19:15:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:15:00,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726566800] [2024-02-07 19:15:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:15:00,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:15:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:15:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:15:00,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:15:00,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726566800] [2024-02-07 19:15:00,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726566800] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:15:00,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:15:00,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:15:00,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951103929] [2024-02-07 19:15:00,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:15:00,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:15:00,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:15:00,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:15:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:15:00,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:15:00,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 932 transitions, 29062 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:15:00,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:15:00,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:15:00,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:15:03,930 INFO L124 PetriNetUnfolderBase]: 6194/9702 cut-off events. [2024-02-07 19:15:03,930 INFO L125 PetriNetUnfolderBase]: For 433783/433783 co-relation queries the response was YES. [2024-02-07 19:15:04,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110481 conditions, 9702 events. 6194/9702 cut-off events. For 433783/433783 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 61105 event pairs, 1752 based on Foata normal form. 8/9710 useless extension candidates. Maximal degree in co-relation 110324. Up to 8884 conditions per place. [2024-02-07 19:15:04,051 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 777 selfloop transitions, 177 changer transitions 0/955 dead transitions. [2024-02-07 19:15:04,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 955 transitions, 31241 flow [2024-02-07 19:15:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:15:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:15:04,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-02-07 19:15:04,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-02-07 19:15:04,066 INFO L175 Difference]: Start difference. First operand has 392 places, 932 transitions, 29062 flow. Second operand 7 states and 91 transitions. [2024-02-07 19:15:04,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 955 transitions, 31241 flow [2024-02-07 19:15:07,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 955 transitions, 31114 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-02-07 19:15:07,125 INFO L231 Difference]: Finished difference. Result has 396 places, 934 transitions, 29365 flow [2024-02-07 19:15:07,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=28935, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29365, PETRI_PLACES=396, PETRI_TRANSITIONS=934} [2024-02-07 19:15:07,126 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 364 predicate places. [2024-02-07 19:15:07,126 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 934 transitions, 29365 flow [2024-02-07 19:15:07,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-02-07 19:15:07,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:15:07,127 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] [2024-02-07 19:15:07,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-02-07 19:15:07,127 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:15:07,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:15:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2110828617, now seen corresponding path program 31 times [2024-02-07 19:15:07,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:15:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298263344] [2024-02-07 19:15:07,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:15:07,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:15:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:15:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:15:07,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:15:07,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298263344] [2024-02-07 19:15:07,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298263344] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:15:07,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:15:07,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:15:07,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538156959] [2024-02-07 19:15:07,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:15:07,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:15:07,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:15:07,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:15:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:15:07,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:15:07,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 934 transitions, 29365 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2024-02-07 19:15:07,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:15:07,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:15:07,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand