./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy11.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/test-easy11.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/test-easy11.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/test-easy11.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-dev-958ec4d-m [2024-02-07 14:43:03,794 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:43:03,870 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:43:03,874 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:43:03,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:43:03,888 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:43:03,889 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:43:03,889 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:43:03,890 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:43:03,890 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:43:03,890 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:43:03,890 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:43:03,891 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:43:03,891 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:43:03,891 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:43:03,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:43:03,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:43:03,892 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:43:03,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:43:03,893 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:43:03,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:43:03,899 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:43:03,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:43:03,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:43:03,901 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:43:03,901 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:43:03,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:43:03,902 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:43:03,902 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:43:03,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:43:03,902 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:43:03,903 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:43:03,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:43:03,903 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:43:03,904 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:43:03,904 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:43:03,904 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:43:03,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:43:03,905 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:43:03,905 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:43:03,905 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:43:03,906 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:43:03,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:43:03,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:43:04,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:43:04,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:43:04,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:43:04,152 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:43:04,152 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:43:04,153 INFO L431 ainManager$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/test-easy11.wvr.yml/witness.yml [2024-02-07 14:43:04,251 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:43:04,252 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:43:04,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-02-07 14:43:05,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:43:05,435 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:43:05,436 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2024-02-07 14:43:05,441 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d767bf9b/142c6052b9ad46cb877592839c9cded0/FLAGa0fcaf28a [2024-02-07 14:43:05,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d767bf9b/142c6052b9ad46cb877592839c9cded0 [2024-02-07 14:43:05,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:43:05,866 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:43:05,867 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:43:05,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:43:05,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:43:05,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:43:04" (1/2) ... [2024-02-07 14:43:05,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b255c8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:05, skipping insertion in model container [2024-02-07 14:43:05,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:43:04" (1/2) ... [2024-02-07 14:43:05,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a446797 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:43:05, skipping insertion in model container [2024-02-07 14:43:05,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:43:05" (2/2) ... [2024-02-07 14:43:05,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53b255c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:05, skipping insertion in model container [2024-02-07 14:43:05,873 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:43:05" (2/2) ... [2024-02-07 14:43:05,874 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:43:05,892 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:43:05,893 INFO L76 edCorrectnessWitness]: Location invariant before [L61-L61] 10000 <= Y [2024-02-07 14:43:05,893 INFO L76 edCorrectnessWitness]: Location invariant before [L60-L60] ((0 <= Y) && (10000 <= x)) && (x != 0) [2024-02-07 14:43:05,894 INFO L76 edCorrectnessWitness]: Location invariant before [L69-L69] ((((0LL - (long long )X) + (long long )Y >= 0LL) && ((long long )X + (long long )Y >= 0LL)) && ((0LL - (long long )X) - (long long )Y >= 0LL)) && ((long long )X - (long long )Y >= 0LL) [2024-02-07 14:43:05,894 INFO L76 edCorrectnessWitness]: Location invariant before [L48-L48] 10000 <= Y [2024-02-07 14:43:05,894 INFO L76 edCorrectnessWitness]: Location invariant before [L57-L57] x <= 9999 [2024-02-07 14:43:05,894 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] x <= 9999 [2024-02-07 14:43:05,894 INFO L76 edCorrectnessWitness]: Location invariant before [L78-L78] 0 <= Y [2024-02-07 14:43:05,894 INFO L76 edCorrectnessWitness]: Location invariant before [L47-L47] ((0 <= Y) && (10000 <= x)) && (x != 0) [2024-02-07 14:43:05,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:43:06,061 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/test-easy11.wvr.c[2031,2044] [2024-02-07 14:43:06,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:43:06,084 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:43:06,125 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/test-easy11.wvr.c[2031,2044] [2024-02-07 14:43:06,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:43:06,148 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:43:06,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06 WrapperNode [2024-02-07 14:43:06,148 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:43:06,149 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:43:06,150 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:43:06,150 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:43:06,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,170 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,189 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2024-02-07 14:43:06,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:43:06,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:43:06,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:43:06,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:43:06,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,204 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,225 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 14:43:06,225 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,225 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,233 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,241 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,242 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,245 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:43:06,246 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:43:06,246 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:43:06,247 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:43:06,247 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (1/1) ... [2024-02-07 14:43:06,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:43:06,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:06,275 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 14:43:06,277 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 14:43:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:43:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:43:06,311 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:43:06,311 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:43:06,312 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:43:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:43:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:43:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:43:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:43:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:43:06,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:43:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:43:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:43:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:43:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:43:06,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:43:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:43:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:43:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:43:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:43:06,315 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 14:43:06,405 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:43:06,407 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:43:06,612 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:43:06,613 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:43:06,736 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:43:06,737 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:43:06,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:43:06 BoogieIcfgContainer [2024-02-07 14:43:06,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:43:06,739 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:43:06,739 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:43:06,750 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:43:06,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:43:04" (1/4) ... [2024-02-07 14:43:06,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed86716 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:43:06, skipping insertion in model container [2024-02-07 14:43:06,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:43:05" (2/4) ... [2024-02-07 14:43:06,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed86716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:43:06, skipping insertion in model container [2024-02-07 14:43:06,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:43:06" (3/4) ... [2024-02-07 14:43:06,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ed86716 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:43:06, skipping insertion in model container [2024-02-07 14:43:06,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:43:06" (4/4) ... [2024-02-07 14:43:06,753 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2024-02-07 14:43:06,769 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:43:06,770 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-02-07 14:43:06,770 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:43:06,916 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:43:06,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 35 transitions, 84 flow [2024-02-07 14:43:06,987 INFO L124 PetriNetUnfolderBase]: 2/33 cut-off events. [2024-02-07 14:43:06,987 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:43:06,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 2/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 46 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-02-07 14:43:06,991 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 35 transitions, 84 flow [2024-02-07 14:43:06,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 32 transitions, 76 flow [2024-02-07 14:43:07,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:43:07,017 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;@4e3c7d0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:43:07,017 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-02-07 14:43:07,020 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:43:07,020 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:43:07,020 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:43:07,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:43:07,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:07,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:07,029 INFO L85 PathProgramCache]: Analyzing trace with hash 8334, now seen corresponding path program 1 times [2024-02-07 14:43:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:07,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384546837] [2024-02-07 14:43:07,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:07,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:07,260 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 14:43:07,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:07,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384546837] [2024-02-07 14:43:07,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384546837] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:07,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:07,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:43:07,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272042019] [2024-02-07 14:43:07,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:07,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:07,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:07,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-07 14:43:07,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 14:43:07,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:07,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-07 14:43:07,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:07,413 INFO L124 PetriNetUnfolderBase]: 133/246 cut-off events. [2024-02-07 14:43:07,414 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-02-07 14:43:07,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 246 events. 133/246 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 750 event pairs, 105 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 430. Up to 234 conditions per place. [2024-02-07 14:43:07,418 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-02-07 14:43:07,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 116 flow [2024-02-07 14:43:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-02-07 14:43:07,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-02-07 14:43:07,429 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 76 flow. Second operand 3 states and 50 transitions. [2024-02-07 14:43:07,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 116 flow [2024-02-07 14:43:07,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:07,434 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 66 flow [2024-02-07 14:43:07,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-02-07 14:43:07,438 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2024-02-07 14:43:07,438 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 66 flow [2024-02-07 14:43:07,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 14:43:07,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 14:43:07,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:43:07,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:07,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash -884465604, now seen corresponding path program 1 times [2024-02-07 14:43:07,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:07,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052233185] [2024-02-07 14:43:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:07,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:07,472 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 14:43:07,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:07,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052233185] [2024-02-07 14:43:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052233185] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:07,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:07,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:07,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336072665] [2024-02-07 14:43:07,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:07,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:07,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-07 14:43:07,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 14:43:07,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:07,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-07 14:43:07,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:07,548 INFO L124 PetriNetUnfolderBase]: 153/276 cut-off events. [2024-02-07 14:43:07,548 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-07 14:43:07,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 276 events. 153/276 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 918 event pairs, 105 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 547. Up to 234 conditions per place. [2024-02-07 14:43:07,552 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-02-07 14:43:07,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 147 flow [2024-02-07 14:43:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 57 transitions. [2024-02-07 14:43:07,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-02-07 14:43:07,556 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 66 flow. Second operand 3 states and 57 transitions. [2024-02-07 14:43:07,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 147 flow [2024-02-07 14:43:07,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 143 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:07,559 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 64 flow [2024-02-07 14:43:07,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2024-02-07 14:43:07,561 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -6 predicate places. [2024-02-07 14:43:07,561 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 64 flow [2024-02-07 14:43:07,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 14:43:07,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 14:43:07,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:43:07,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:07,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:07,562 INFO L85 PathProgramCache]: Analyzing trace with hash -884465571, now seen corresponding path program 1 times [2024-02-07 14:43:07,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:07,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258976043] [2024-02-07 14:43:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:07,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:07,653 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 14:43:07,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258976043] [2024-02-07 14:43:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258976043] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:07,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:07,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:07,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927451250] [2024-02-07 14:43:07,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:07,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:07,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:07,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:07,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:07,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 14:43:07,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:07,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:07,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:07,755 INFO L124 PetriNetUnfolderBase]: 137/250 cut-off events. [2024-02-07 14:43:07,756 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-02-07 14:43:07,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 250 events. 137/250 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 796 event pairs, 37 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 400. Up to 144 conditions per place. [2024-02-07 14:43:07,762 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 40 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-02-07 14:43:07,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 49 transitions, 202 flow [2024-02-07 14:43:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-02-07 14:43:07,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-02-07 14:43:07,766 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 64 flow. Second operand 4 states and 74 transitions. [2024-02-07 14:43:07,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 49 transitions, 202 flow [2024-02-07 14:43:07,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:07,770 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 92 flow [2024-02-07 14:43:07,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-02-07 14:43:07,771 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-02-07 14:43:07,772 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 92 flow [2024-02-07 14:43:07,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 14:43:07,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:07,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:43:07,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:07,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:07,773 INFO L85 PathProgramCache]: Analyzing trace with hash 430782032, now seen corresponding path program 1 times [2024-02-07 14:43:07,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:07,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885418669] [2024-02-07 14:43:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:07,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:07,809 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 14:43:07,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:07,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885418669] [2024-02-07 14:43:07,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885418669] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:07,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:07,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:07,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548669317] [2024-02-07 14:43:07,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:07,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:07,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:07,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:07,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:07,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 35 [2024-02-07 14:43:07,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 14:43:07,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:07,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 35 [2024-02-07 14:43:07,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:07,871 INFO L124 PetriNetUnfolderBase]: 134/241 cut-off events. [2024-02-07 14:43:07,872 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-02-07 14:43:07,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 567 conditions, 241 events. 134/241 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 710 event pairs, 83 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 299. Up to 208 conditions per place. [2024-02-07 14:43:07,873 INFO L140 encePairwiseOnDemand]: 32/35 looper letters, 33 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-02-07 14:43:07,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 184 flow [2024-02-07 14:43:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2024-02-07 14:43:07,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-02-07 14:43:07,875 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 92 flow. Second operand 3 states and 56 transitions. [2024-02-07 14:43:07,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 184 flow [2024-02-07 14:43:07,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 184 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:43:07,877 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 94 flow [2024-02-07 14:43:07,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-02-07 14:43:07,878 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -2 predicate places. [2024-02-07 14:43:07,879 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 94 flow [2024-02-07 14:43:07,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 14:43:07,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:07,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:43:07,880 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:07,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash 430782065, now seen corresponding path program 1 times [2024-02-07 14:43:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:07,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85095857] [2024-02-07 14:43:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:07,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:07,985 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 14:43:07,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:07,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85095857] [2024-02-07 14:43:07,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85095857] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:07,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:07,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:07,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189242583] [2024-02-07 14:43:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:07,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:07,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:07,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:07,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:07,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 14:43:07,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:07,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:07,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,101 INFO L124 PetriNetUnfolderBase]: 123/224 cut-off events. [2024-02-07 14:43:08,101 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-02-07 14:43:08,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 224 events. 123/224 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 647 event pairs, 38 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 431. Up to 146 conditions per place. [2024-02-07 14:43:08,103 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 36 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2024-02-07 14:43:08,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 218 flow [2024-02-07 14:43:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:08,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-02-07 14:43:08,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-07 14:43:08,110 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 94 flow. Second operand 4 states and 70 transitions. [2024-02-07 14:43:08,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 218 flow [2024-02-07 14:43:08,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:08,112 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 120 flow [2024-02-07 14:43:08,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-02-07 14:43:08,115 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2024-02-07 14:43:08,115 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 120 flow [2024-02-07 14:43:08,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 14:43:08,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:08,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:08,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:43:08,116 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:08,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash 661590501, now seen corresponding path program 1 times [2024-02-07 14:43:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542351363] [2024-02-07 14:43:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,166 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 14:43:08,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542351363] [2024-02-07 14:43:08,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542351363] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:08,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:08,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:08,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070208274] [2024-02-07 14:43:08,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:08,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:08,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:08,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:08,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:43:08,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:08,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,233 INFO L124 PetriNetUnfolderBase]: 129/235 cut-off events. [2024-02-07 14:43:08,233 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2024-02-07 14:43:08,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 235 events. 129/235 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 714 event pairs, 33 based on Foata normal form. 6/236 useless extension candidates. Maximal degree in co-relation 368. Up to 86 conditions per place. [2024-02-07 14:43:08,235 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 36 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2024-02-07 14:43:08,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 232 flow [2024-02-07 14:43:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-02-07 14:43:08,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-07 14:43:08,236 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 120 flow. Second operand 4 states and 70 transitions. [2024-02-07 14:43:08,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 232 flow [2024-02-07 14:43:08,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:08,237 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 141 flow [2024-02-07 14:43:08,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2024-02-07 14:43:08,238 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2024-02-07 14:43:08,238 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 141 flow [2024-02-07 14:43:08,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:43:08,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:08,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:08,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:43:08,239 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:08,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash 661594221, now seen corresponding path program 2 times [2024-02-07 14:43:08,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836376147] [2024-02-07 14:43:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,277 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 14:43:08,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836376147] [2024-02-07 14:43:08,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836376147] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:08,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:08,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:08,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842071174] [2024-02-07 14:43:08,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:08,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:08,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:08,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 141 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:43:08,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:08,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,338 INFO L124 PetriNetUnfolderBase]: 123/223 cut-off events. [2024-02-07 14:43:08,338 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2024-02-07 14:43:08,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 223 events. 123/223 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 657 event pairs, 44 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 386. Up to 111 conditions per place. [2024-02-07 14:43:08,340 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 36 selfloop transitions, 6 changer transitions 0/45 dead transitions. [2024-02-07 14:43:08,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 251 flow [2024-02-07 14:43:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-02-07 14:43:08,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-02-07 14:43:08,341 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 141 flow. Second operand 4 states and 68 transitions. [2024-02-07 14:43:08,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 251 flow [2024-02-07 14:43:08,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 232 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:08,344 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 128 flow [2024-02-07 14:43:08,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-02-07 14:43:08,344 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2024-02-07 14:43:08,344 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 128 flow [2024-02-07 14:43:08,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:43:08,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:08,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:08,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:43:08,345 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:08,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,346 INFO L85 PathProgramCache]: Analyzing trace with hash 661594491, now seen corresponding path program 1 times [2024-02-07 14:43:08,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619472255] [2024-02-07 14:43:08,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,376 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 14:43:08,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619472255] [2024-02-07 14:43:08,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619472255] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:08,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:08,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:08,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405051356] [2024-02-07 14:43:08,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:08,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:08,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:08,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:43:08,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:08,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,438 INFO L124 PetriNetUnfolderBase]: 127/232 cut-off events. [2024-02-07 14:43:08,438 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2024-02-07 14:43:08,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 232 events. 127/232 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 690 event pairs, 46 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 368. Up to 102 conditions per place. [2024-02-07 14:43:08,440 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 37 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2024-02-07 14:43:08,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 250 flow [2024-02-07 14:43:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:08,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-02-07 14:43:08,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-02-07 14:43:08,441 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 128 flow. Second operand 4 states and 68 transitions. [2024-02-07 14:43:08,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 250 flow [2024-02-07 14:43:08,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 241 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:08,442 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 150 flow [2024-02-07 14:43:08,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-02-07 14:43:08,443 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2024-02-07 14:43:08,443 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 150 flow [2024-02-07 14:43:08,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:43:08,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:08,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:08,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:43:08,444 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:08,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,444 INFO L85 PathProgramCache]: Analyzing trace with hash 668123091, now seen corresponding path program 2 times [2024-02-07 14:43:08,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579367755] [2024-02-07 14:43:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,472 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 14:43:08,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579367755] [2024-02-07 14:43:08,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579367755] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:08,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:08,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:08,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713829563] [2024-02-07 14:43:08,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:08,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:08,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:08,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:43:08,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:08,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,531 INFO L124 PetriNetUnfolderBase]: 123/225 cut-off events. [2024-02-07 14:43:08,532 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2024-02-07 14:43:08,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 225 events. 123/225 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 660 event pairs, 41 based on Foata normal form. 4/225 useless extension candidates. Maximal degree in co-relation 317. Up to 104 conditions per place. [2024-02-07 14:43:08,533 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 33 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2024-02-07 14:43:08,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 243 flow [2024-02-07 14:43:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-02-07 14:43:08,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-02-07 14:43:08,534 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 150 flow. Second operand 4 states and 65 transitions. [2024-02-07 14:43:08,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 243 flow [2024-02-07 14:43:08,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 235 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:08,536 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 148 flow [2024-02-07 14:43:08,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2024-02-07 14:43:08,536 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2024-02-07 14:43:08,537 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 148 flow [2024-02-07 14:43:08,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:43:08,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:08,537 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] [2024-02-07 14:43:08,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 14:43:08,537 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:08,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1875972979, now seen corresponding path program 1 times [2024-02-07 14:43:08,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460501513] [2024-02-07 14:43:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,675 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 14:43:08,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460501513] [2024-02-07 14:43:08,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460501513] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:08,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:08,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:08,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70909291] [2024-02-07 14:43:08,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:43:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:43:08,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:08,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:08,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:08,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:08,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,884 INFO L124 PetriNetUnfolderBase]: 218/386 cut-off events. [2024-02-07 14:43:08,885 INFO L125 PetriNetUnfolderBase]: For 251/251 co-relation queries the response was YES. [2024-02-07 14:43:08,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131 conditions, 386 events. 218/386 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1424 event pairs, 17 based on Foata normal form. 1/387 useless extension candidates. Maximal degree in co-relation 394. Up to 167 conditions per place. [2024-02-07 14:43:08,888 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 49 selfloop transitions, 14 changer transitions 14/79 dead transitions. [2024-02-07 14:43:08,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 79 transitions, 475 flow [2024-02-07 14:43:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-02-07 14:43:08,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-02-07 14:43:08,889 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 148 flow. Second operand 8 states and 112 transitions. [2024-02-07 14:43:08,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 79 transitions, 475 flow [2024-02-07 14:43:08,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 446 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:08,892 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 246 flow [2024-02-07 14:43:08,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=246, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2024-02-07 14:43:08,892 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2024-02-07 14:43:08,893 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 246 flow [2024-02-07 14:43:08,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:08,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:08,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:08,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 14:43:08,893 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:08,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,894 INFO L85 PathProgramCache]: Analyzing trace with hash 593071581, now seen corresponding path program 2 times [2024-02-07 14:43:08,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373062353] [2024-02-07 14:43:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:09,011 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 14:43:09,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373062353] [2024-02-07 14:43:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373062353] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:09,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:09,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:09,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314202281] [2024-02-07 14:43:09,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:09,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:43:09,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:09,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:43:09,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:09,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:09,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 246 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 14:43:09,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:09,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:09,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:09,209 INFO L124 PetriNetUnfolderBase]: 225/410 cut-off events. [2024-02-07 14:43:09,209 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-02-07 14:43:09,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1389 conditions, 410 events. 225/410 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1561 event pairs, 36 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1374. Up to 187 conditions per place. [2024-02-07 14:43:09,212 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 46 selfloop transitions, 19 changer transitions 14/82 dead transitions. [2024-02-07 14:43:09,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 599 flow [2024-02-07 14:43:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-02-07 14:43:09,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-02-07 14:43:09,213 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 246 flow. Second operand 8 states and 122 transitions. [2024-02-07 14:43:09,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 599 flow [2024-02-07 14:43:09,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 82 transitions, 575 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:09,216 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 387 flow [2024-02-07 14:43:09,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=387, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2024-02-07 14:43:09,216 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 23 predicate places. [2024-02-07 14:43:09,217 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 387 flow [2024-02-07 14:43:09,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 14:43:09,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:09,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:09,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 14:43:09,217 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:09,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:09,218 INFO L85 PathProgramCache]: Analyzing trace with hash -129107785, now seen corresponding path program 3 times [2024-02-07 14:43:09,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:09,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404380722] [2024-02-07 14:43:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:09,311 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 14:43:09,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:09,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404380722] [2024-02-07 14:43:09,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404380722] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:09,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:09,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:09,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128595050] [2024-02-07 14:43:09,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:09,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:43:09,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:09,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:43:09,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:09,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:09,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 387 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:09,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:09,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:09,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:09,528 INFO L124 PetriNetUnfolderBase]: 271/475 cut-off events. [2024-02-07 14:43:09,529 INFO L125 PetriNetUnfolderBase]: For 851/851 co-relation queries the response was YES. [2024-02-07 14:43:09,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 475 events. 271/475 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1849 event pairs, 39 based on Foata normal form. 1/476 useless extension candidates. Maximal degree in co-relation 1743. Up to 172 conditions per place. [2024-02-07 14:43:09,531 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 52 selfloop transitions, 19 changer transitions 12/85 dead transitions. [2024-02-07 14:43:09,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 674 flow [2024-02-07 14:43:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-02-07 14:43:09,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-02-07 14:43:09,533 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 387 flow. Second operand 8 states and 106 transitions. [2024-02-07 14:43:09,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 674 flow [2024-02-07 14:43:09,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 643 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:09,536 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 414 flow [2024-02-07 14:43:09,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=414, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-02-07 14:43:09,537 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2024-02-07 14:43:09,537 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 414 flow [2024-02-07 14:43:09,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:09,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:09,537 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] [2024-02-07 14:43:09,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 14:43:09,538 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:09,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash -364784107, now seen corresponding path program 4 times [2024-02-07 14:43:09,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:09,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041775587] [2024-02-07 14:43:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:09,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:09,633 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 14:43:09,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:09,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041775587] [2024-02-07 14:43:09,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041775587] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:09,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:09,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644761049] [2024-02-07 14:43:09,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:43:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:43:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:09,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:09,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 414 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 14:43:09,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:09,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:09,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:09,821 INFO L124 PetriNetUnfolderBase]: 209/383 cut-off events. [2024-02-07 14:43:09,821 INFO L125 PetriNetUnfolderBase]: For 1058/1058 co-relation queries the response was YES. [2024-02-07 14:43:09,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 383 events. 209/383 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1503 event pairs, 26 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 1484. Up to 195 conditions per place. [2024-02-07 14:43:09,823 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 51 selfloop transitions, 19 changer transitions 11/84 dead transitions. [2024-02-07 14:43:09,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 744 flow [2024-02-07 14:43:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-02-07 14:43:09,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-02-07 14:43:09,825 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 414 flow. Second operand 8 states and 118 transitions. [2024-02-07 14:43:09,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 744 flow [2024-02-07 14:43:09,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 678 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:09,828 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 445 flow [2024-02-07 14:43:09,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=445, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2024-02-07 14:43:09,829 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2024-02-07 14:43:09,829 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 445 flow [2024-02-07 14:43:09,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 14:43:09,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:09,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:09,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 14:43:09,830 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:09,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:09,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1127220625, now seen corresponding path program 5 times [2024-02-07 14:43:09,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:09,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868891006] [2024-02-07 14:43:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:09,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:09,987 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 14:43:09,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:09,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868891006] [2024-02-07 14:43:09,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868891006] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:09,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:09,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:09,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395897840] [2024-02-07 14:43:09,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:09,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:43:09,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:43:09,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:10,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:10,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 445 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 14:43:10,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:10,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:10,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:10,168 INFO L124 PetriNetUnfolderBase]: 207/381 cut-off events. [2024-02-07 14:43:10,168 INFO L125 PetriNetUnfolderBase]: For 962/962 co-relation queries the response was YES. [2024-02-07 14:43:10,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 381 events. 207/381 cut-off events. For 962/962 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1495 event pairs, 18 based on Foata normal form. 1/382 useless extension candidates. Maximal degree in co-relation 1438. Up to 193 conditions per place. [2024-02-07 14:43:10,170 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 45 selfloop transitions, 22 changer transitions 11/81 dead transitions. [2024-02-07 14:43:10,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 709 flow [2024-02-07 14:43:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:10,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:10,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-02-07 14:43:10,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-02-07 14:43:10,172 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 445 flow. Second operand 8 states and 119 transitions. [2024-02-07 14:43:10,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 709 flow [2024-02-07 14:43:10,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 667 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:10,177 INFO L231 Difference]: Finished difference. Result has 69 places, 55 transitions, 464 flow [2024-02-07 14:43:10,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=464, PETRI_PLACES=69, PETRI_TRANSITIONS=55} [2024-02-07 14:43:10,177 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 32 predicate places. [2024-02-07 14:43:10,177 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 55 transitions, 464 flow [2024-02-07 14:43:10,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 14:43:10,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:10,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:10,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 14:43:10,178 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:10,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:10,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1409762257, now seen corresponding path program 6 times [2024-02-07 14:43:10,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:10,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967796402] [2024-02-07 14:43:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:10,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:10,330 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 14:43:10,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:10,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967796402] [2024-02-07 14:43:10,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967796402] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:10,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:10,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:10,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397357396] [2024-02-07 14:43:10,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:10,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:43:10,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:43:10,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:10,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 35 [2024-02-07 14:43:10,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 55 transitions, 464 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 14:43:10,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:10,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 35 [2024-02-07 14:43:10,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:10,570 INFO L124 PetriNetUnfolderBase]: 217/399 cut-off events. [2024-02-07 14:43:10,571 INFO L125 PetriNetUnfolderBase]: For 1028/1028 co-relation queries the response was YES. [2024-02-07 14:43:10,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 399 events. 217/399 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1581 event pairs, 20 based on Foata normal form. 1/400 useless extension candidates. Maximal degree in co-relation 1517. Up to 193 conditions per place. [2024-02-07 14:43:10,573 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 48 selfloop transitions, 22 changer transitions 10/83 dead transitions. [2024-02-07 14:43:10,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 725 flow [2024-02-07 14:43:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-02-07 14:43:10,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-02-07 14:43:10,575 INFO L175 Difference]: Start difference. First operand has 69 places, 55 transitions, 464 flow. Second operand 8 states and 119 transitions. [2024-02-07 14:43:10,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 725 flow [2024-02-07 14:43:10,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 677 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:10,578 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 476 flow [2024-02-07 14:43:10,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2024-02-07 14:43:10,579 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2024-02-07 14:43:10,579 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 476 flow [2024-02-07 14:43:10,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 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 14:43:10,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:10,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:10,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 14:43:10,580 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:10,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:10,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1134555627, now seen corresponding path program 7 times [2024-02-07 14:43:10,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:10,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315083413] [2024-02-07 14:43:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:10,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:10,671 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 14:43:10,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:10,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315083413] [2024-02-07 14:43:10,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315083413] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:10,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:10,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:10,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373170926] [2024-02-07 14:43:10,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:10,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:43:10,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:10,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:43:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:10,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:10,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 476 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:10,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:10,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:10,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:10,875 INFO L124 PetriNetUnfolderBase]: 276/492 cut-off events. [2024-02-07 14:43:10,876 INFO L125 PetriNetUnfolderBase]: For 1263/1263 co-relation queries the response was YES. [2024-02-07 14:43:10,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1877 conditions, 492 events. 276/492 cut-off events. For 1263/1263 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1894 event pairs, 41 based on Foata normal form. 1/493 useless extension candidates. Maximal degree in co-relation 1855. Up to 263 conditions per place. [2024-02-07 14:43:10,879 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 52 selfloop transitions, 20 changer transitions 11/85 dead transitions. [2024-02-07 14:43:10,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 751 flow [2024-02-07 14:43:10,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-02-07 14:43:10,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-02-07 14:43:10,880 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 476 flow. Second operand 8 states and 105 transitions. [2024-02-07 14:43:10,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 751 flow [2024-02-07 14:43:10,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 85 transitions, 701 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:10,885 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 476 flow [2024-02-07 14:43:10,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=476, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2024-02-07 14:43:10,885 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2024-02-07 14:43:10,885 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 476 flow [2024-02-07 14:43:10,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:10,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:10,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:10,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-07 14:43:10,886 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:10,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash 623428787, now seen corresponding path program 8 times [2024-02-07 14:43:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:10,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211786791] [2024-02-07 14:43:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:10,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:10,986 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 14:43:10,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:10,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211786791] [2024-02-07 14:43:10,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211786791] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:10,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:10,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:10,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835248516] [2024-02-07 14:43:10,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:10,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:43:10,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:10,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:43:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:11,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:11,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 476 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:11,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:11,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:11,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:11,195 INFO L124 PetriNetUnfolderBase]: 286/510 cut-off events. [2024-02-07 14:43:11,195 INFO L125 PetriNetUnfolderBase]: For 1290/1290 co-relation queries the response was YES. [2024-02-07 14:43:11,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 510 events. 286/510 cut-off events. For 1290/1290 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2020 event pairs, 45 based on Foata normal form. 1/511 useless extension candidates. Maximal degree in co-relation 1925. Up to 263 conditions per place. [2024-02-07 14:43:11,198 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 54 selfloop transitions, 20 changer transitions 10/86 dead transitions. [2024-02-07 14:43:11,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 754 flow [2024-02-07 14:43:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-02-07 14:43:11,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-02-07 14:43:11,199 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 476 flow. Second operand 8 states and 105 transitions. [2024-02-07 14:43:11,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 754 flow [2024-02-07 14:43:11,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 710 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:11,204 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 490 flow [2024-02-07 14:43:11,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=490, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2024-02-07 14:43:11,205 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 38 predicate places. [2024-02-07 14:43:11,205 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 490 flow [2024-02-07 14:43:11,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:11,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:11,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-07 14:43:11,206 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:11,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:11,206 INFO L85 PathProgramCache]: Analyzing trace with hash -62436779, now seen corresponding path program 9 times [2024-02-07 14:43:11,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:11,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204120913] [2024-02-07 14:43:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:11,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:11,307 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 14:43:11,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:11,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204120913] [2024-02-07 14:43:11,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204120913] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:11,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:11,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:11,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868273012] [2024-02-07 14:43:11,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:11,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:43:11,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:11,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:43:11,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:43:11,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:11,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 490 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:11,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:11,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:11,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:11,510 INFO L124 PetriNetUnfolderBase]: 294/526 cut-off events. [2024-02-07 14:43:11,510 INFO L125 PetriNetUnfolderBase]: For 1441/1441 co-relation queries the response was YES. [2024-02-07 14:43:11,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2025 conditions, 526 events. 294/526 cut-off events. For 1441/1441 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2088 event pairs, 51 based on Foata normal form. 1/527 useless extension candidates. Maximal degree in co-relation 2001. Up to 195 conditions per place. [2024-02-07 14:43:11,512 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 54 selfloop transitions, 19 changer transitions 10/85 dead transitions. [2024-02-07 14:43:11,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 769 flow [2024-02-07 14:43:11,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-02-07 14:43:11,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-02-07 14:43:11,514 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 490 flow. Second operand 8 states and 98 transitions. [2024-02-07 14:43:11,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 769 flow [2024-02-07 14:43:11,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 719 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:11,518 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 498 flow [2024-02-07 14:43:11,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=498, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2024-02-07 14:43:11,519 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 39 predicate places. [2024-02-07 14:43:11,519 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 498 flow [2024-02-07 14:43:11,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:11,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:11,519 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 14:43:11,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-07 14:43:11,520 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:11,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:11,520 INFO L85 PathProgramCache]: Analyzing trace with hash -174325642, now seen corresponding path program 1 times [2024-02-07 14:43:11,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:11,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606600582] [2024-02-07 14:43:11,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:11,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:11,576 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 14:43:11,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:11,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606600582] [2024-02-07 14:43:11,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606600582] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:11,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:11,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:11,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857546944] [2024-02-07 14:43:11,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:11,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:11,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:11,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:11,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:11,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:11,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:11,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:11,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:11,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:11,753 INFO L124 PetriNetUnfolderBase]: 448/794 cut-off events. [2024-02-07 14:43:11,753 INFO L125 PetriNetUnfolderBase]: For 2260/2260 co-relation queries the response was YES. [2024-02-07 14:43:11,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3049 conditions, 794 events. 448/794 cut-off events. For 2260/2260 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3653 event pairs, 56 based on Foata normal form. 20/814 useless extension candidates. Maximal degree in co-relation 3021. Up to 273 conditions per place. [2024-02-07 14:43:11,758 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 97 selfloop transitions, 31 changer transitions 0/130 dead transitions. [2024-02-07 14:43:11,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 1325 flow [2024-02-07 14:43:11,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-02-07 14:43:11,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-02-07 14:43:11,760 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 498 flow. Second operand 8 states and 115 transitions. [2024-02-07 14:43:11,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 1325 flow [2024-02-07 14:43:11,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 1218 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:11,783 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 689 flow [2024-02-07 14:43:11,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=689, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2024-02-07 14:43:11,783 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 42 predicate places. [2024-02-07 14:43:11,784 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 689 flow [2024-02-07 14:43:11,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:11,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:11,784 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 14:43:11,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-07 14:43:11,784 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:11,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash 46289100, now seen corresponding path program 2 times [2024-02-07 14:43:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:11,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463255027] [2024-02-07 14:43:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:11,832 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 14:43:11,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463255027] [2024-02-07 14:43:11,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463255027] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:11,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:11,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:11,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201983774] [2024-02-07 14:43:11,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:11,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:11,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:11,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:11,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:11,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:11,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 689 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:11,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:11,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:11,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:12,070 INFO L124 PetriNetUnfolderBase]: 579/1057 cut-off events. [2024-02-07 14:43:12,070 INFO L125 PetriNetUnfolderBase]: For 3645/3645 co-relation queries the response was YES. [2024-02-07 14:43:12,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4453 conditions, 1057 events. 579/1057 cut-off events. For 3645/3645 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5261 event pairs, 69 based on Foata normal form. 24/1081 useless extension candidates. Maximal degree in co-relation 3524. Up to 504 conditions per place. [2024-02-07 14:43:12,076 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 98 selfloop transitions, 25 changer transitions 2/127 dead transitions. [2024-02-07 14:43:12,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 1315 flow [2024-02-07 14:43:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-02-07 14:43:12,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-02-07 14:43:12,089 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 689 flow. Second operand 6 states and 98 transitions. [2024-02-07 14:43:12,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 1315 flow [2024-02-07 14:43:12,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 127 transitions, 1295 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:12,101 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 891 flow [2024-02-07 14:43:12,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=891, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-02-07 14:43:12,102 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 50 predicate places. [2024-02-07 14:43:12,102 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 891 flow [2024-02-07 14:43:12,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:12,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:12,103 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 14:43:12,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-07 14:43:12,103 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:12,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2096099630, now seen corresponding path program 1 times [2024-02-07 14:43:12,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:12,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693856819] [2024-02-07 14:43:12,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:12,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:12,168 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 14:43:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693856819] [2024-02-07 14:43:12,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693856819] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:12,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:12,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:12,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110451579] [2024-02-07 14:43:12,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:12,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:12,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:12,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:12,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:12,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 891 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:12,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:12,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:12,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:12,432 INFO L124 PetriNetUnfolderBase]: 582/1068 cut-off events. [2024-02-07 14:43:12,433 INFO L125 PetriNetUnfolderBase]: For 5794/5794 co-relation queries the response was YES. [2024-02-07 14:43:12,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4988 conditions, 1068 events. 582/1068 cut-off events. For 5794/5794 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5369 event pairs, 114 based on Foata normal form. 14/1082 useless extension candidates. Maximal degree in co-relation 4184. Up to 319 conditions per place. [2024-02-07 14:43:12,439 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 108 selfloop transitions, 23 changer transitions 9/142 dead transitions. [2024-02-07 14:43:12,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 142 transitions, 1640 flow [2024-02-07 14:43:12,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:43:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:43:12,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-02-07 14:43:12,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4530612244897959 [2024-02-07 14:43:12,441 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 891 flow. Second operand 7 states and 111 transitions. [2024-02-07 14:43:12,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 142 transitions, 1640 flow [2024-02-07 14:43:12,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 142 transitions, 1578 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:12,453 INFO L231 Difference]: Finished difference. Result has 92 places, 93 transitions, 1019 flow [2024-02-07 14:43:12,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1019, PETRI_PLACES=92, PETRI_TRANSITIONS=93} [2024-02-07 14:43:12,454 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 55 predicate places. [2024-02-07 14:43:12,454 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 93 transitions, 1019 flow [2024-02-07 14:43:12,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:12,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:12,455 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 14:43:12,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-02-07 14:43:12,455 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:12,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:12,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1346602612, now seen corresponding path program 3 times [2024-02-07 14:43:12,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:12,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235913049] [2024-02-07 14:43:12,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:12,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:12,484 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 14:43:12,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:12,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235913049] [2024-02-07 14:43:12,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235913049] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:12,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555210069] [2024-02-07 14:43:12,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:12,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:12,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:12,501 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 14:43:12,502 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 14:43:12,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:43:12,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:12,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-07 14:43:12,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:12,605 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 14:43:12,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:12,640 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 14:43:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555210069] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:12,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:43:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2024-02-07 14:43:12,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895433636] [2024-02-07 14:43:12,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:12,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:12,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:12,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:12,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:12,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:12,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 1019 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:12,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:12,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:12,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:12,842 INFO L124 PetriNetUnfolderBase]: 622/1154 cut-off events. [2024-02-07 14:43:12,842 INFO L125 PetriNetUnfolderBase]: For 5970/5970 co-relation queries the response was YES. [2024-02-07 14:43:12,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 1154 events. 622/1154 cut-off events. For 5970/5970 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5851 event pairs, 64 based on Foata normal form. 12/1166 useless extension candidates. Maximal degree in co-relation 4372. Up to 428 conditions per place. [2024-02-07 14:43:12,851 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 86 selfloop transitions, 54 changer transitions 0/142 dead transitions. [2024-02-07 14:43:12,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 142 transitions, 1732 flow [2024-02-07 14:43:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-02-07 14:43:12,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-02-07 14:43:12,852 INFO L175 Difference]: Start difference. First operand has 92 places, 93 transitions, 1019 flow. Second operand 6 states and 96 transitions. [2024-02-07 14:43:12,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 142 transitions, 1732 flow [2024-02-07 14:43:12,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 142 transitions, 1598 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:12,868 INFO L231 Difference]: Finished difference. Result has 96 places, 108 transitions, 1325 flow [2024-02-07 14:43:12,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1325, PETRI_PLACES=96, PETRI_TRANSITIONS=108} [2024-02-07 14:43:12,868 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 59 predicate places. [2024-02-07 14:43:12,869 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 108 transitions, 1325 flow [2024-02-07 14:43:12,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:12,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:12,869 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 14:43:12,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:13,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-02-07 14:43:13,081 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:13,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1577860186, now seen corresponding path program 2 times [2024-02-07 14:43:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:13,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72952869] [2024-02-07 14:43:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:13,113 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 14:43:13,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:13,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72952869] [2024-02-07 14:43:13,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72952869] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:13,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:13,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:13,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533103579] [2024-02-07 14:43:13,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:13,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:13,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:13,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:13,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 108 transitions, 1325 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:13,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:13,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:13,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:13,359 INFO L124 PetriNetUnfolderBase]: 697/1305 cut-off events. [2024-02-07 14:43:13,359 INFO L125 PetriNetUnfolderBase]: For 7867/7867 co-relation queries the response was YES. [2024-02-07 14:43:13,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6469 conditions, 1305 events. 697/1305 cut-off events. For 7867/7867 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6950 event pairs, 208 based on Foata normal form. 24/1329 useless extension candidates. Maximal degree in co-relation 5938. Up to 567 conditions per place. [2024-02-07 14:43:13,367 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 150 selfloop transitions, 34 changer transitions 7/193 dead transitions. [2024-02-07 14:43:13,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 193 transitions, 2476 flow [2024-02-07 14:43:13,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-02-07 14:43:13,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-02-07 14:43:13,369 INFO L175 Difference]: Start difference. First operand has 96 places, 108 transitions, 1325 flow. Second operand 8 states and 134 transitions. [2024-02-07 14:43:13,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 193 transitions, 2476 flow [2024-02-07 14:43:13,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 193 transitions, 2449 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:13,385 INFO L231 Difference]: Finished difference. Result has 106 places, 121 transitions, 1598 flow [2024-02-07 14:43:13,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1598, PETRI_PLACES=106, PETRI_TRANSITIONS=121} [2024-02-07 14:43:13,386 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 69 predicate places. [2024-02-07 14:43:13,386 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 121 transitions, 1598 flow [2024-02-07 14:43:13,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:13,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:13,386 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 14:43:13,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-02-07 14:43:13,387 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:13,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:13,387 INFO L85 PathProgramCache]: Analyzing trace with hash 921369398, now seen corresponding path program 3 times [2024-02-07 14:43:13,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:13,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876946127] [2024-02-07 14:43:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:13,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:13,419 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 14:43:13,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:13,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876946127] [2024-02-07 14:43:13,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876946127] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:13,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:13,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:13,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597633784] [2024-02-07 14:43:13,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:13,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:13,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:13,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:13,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:13,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 1598 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:13,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:13,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:13,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:13,652 INFO L124 PetriNetUnfolderBase]: 698/1306 cut-off events. [2024-02-07 14:43:13,652 INFO L125 PetriNetUnfolderBase]: For 8457/8457 co-relation queries the response was YES. [2024-02-07 14:43:13,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6785 conditions, 1306 events. 698/1306 cut-off events. For 8457/8457 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6915 event pairs, 123 based on Foata normal form. 8/1314 useless extension candidates. Maximal degree in co-relation 6415. Up to 374 conditions per place. [2024-02-07 14:43:13,661 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 151 selfloop transitions, 32 changer transitions 9/194 dead transitions. [2024-02-07 14:43:13,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 194 transitions, 2617 flow [2024-02-07 14:43:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-02-07 14:43:13,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-02-07 14:43:13,662 INFO L175 Difference]: Start difference. First operand has 106 places, 121 transitions, 1598 flow. Second operand 8 states and 135 transitions. [2024-02-07 14:43:13,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 194 transitions, 2617 flow [2024-02-07 14:43:13,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 194 transitions, 2501 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:13,684 INFO L231 Difference]: Finished difference. Result has 114 places, 125 transitions, 1650 flow [2024-02-07 14:43:13,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1650, PETRI_PLACES=114, PETRI_TRANSITIONS=125} [2024-02-07 14:43:13,684 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 77 predicate places. [2024-02-07 14:43:13,684 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 125 transitions, 1650 flow [2024-02-07 14:43:13,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:13,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:13,685 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 14:43:13,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-02-07 14:43:13,685 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:13,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:13,686 INFO L85 PathProgramCache]: Analyzing trace with hash 125075096, now seen corresponding path program 4 times [2024-02-07 14:43:13,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:13,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287621878] [2024-02-07 14:43:13,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:13,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:13,713 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 14:43:13,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287621878] [2024-02-07 14:43:13,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287621878] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:13,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:13,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:13,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036769881] [2024-02-07 14:43:13,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:13,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:13,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:13,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:13,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:13,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:13,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 125 transitions, 1650 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:13,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:13,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:13,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:13,912 INFO L124 PetriNetUnfolderBase]: 597/1115 cut-off events. [2024-02-07 14:43:13,913 INFO L125 PetriNetUnfolderBase]: For 7711/7711 co-relation queries the response was YES. [2024-02-07 14:43:13,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5927 conditions, 1115 events. 597/1115 cut-off events. For 7711/7711 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5597 event pairs, 76 based on Foata normal form. 24/1139 useless extension candidates. Maximal degree in co-relation 5577. Up to 626 conditions per place. [2024-02-07 14:43:13,919 INFO L140 encePairwiseOnDemand]: 25/35 looper letters, 110 selfloop transitions, 54 changer transitions 6/172 dead transitions. [2024-02-07 14:43:13,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 172 transitions, 2387 flow [2024-02-07 14:43:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:43:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:43:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-02-07 14:43:13,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-02-07 14:43:13,920 INFO L175 Difference]: Start difference. First operand has 114 places, 125 transitions, 1650 flow. Second operand 7 states and 110 transitions. [2024-02-07 14:43:13,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 172 transitions, 2387 flow [2024-02-07 14:43:13,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 172 transitions, 2302 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-02-07 14:43:13,939 INFO L231 Difference]: Finished difference. Result has 118 places, 129 transitions, 1796 flow [2024-02-07 14:43:13,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1796, PETRI_PLACES=118, PETRI_TRANSITIONS=129} [2024-02-07 14:43:13,939 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 81 predicate places. [2024-02-07 14:43:13,939 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 129 transitions, 1796 flow [2024-02-07 14:43:13,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:13,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:13,940 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 14:43:13,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-02-07 14:43:13,940 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:13,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:13,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1517986770, now seen corresponding path program 5 times [2024-02-07 14:43:13,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:13,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838920432] [2024-02-07 14:43:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:13,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:13,967 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 14:43:13,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838920432] [2024-02-07 14:43:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838920432] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:13,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:13,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:13,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142532449] [2024-02-07 14:43:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:13,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:13,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 129 transitions, 1796 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:13,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:13,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:13,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:14,190 INFO L124 PetriNetUnfolderBase]: 766/1406 cut-off events. [2024-02-07 14:43:14,190 INFO L125 PetriNetUnfolderBase]: For 9683/9683 co-relation queries the response was YES. [2024-02-07 14:43:14,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7688 conditions, 1406 events. 766/1406 cut-off events. For 9683/9683 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7415 event pairs, 80 based on Foata normal form. 4/1410 useless extension candidates. Maximal degree in co-relation 7226. Up to 661 conditions per place. [2024-02-07 14:43:14,200 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 131 selfloop transitions, 77 changer transitions 0/210 dead transitions. [2024-02-07 14:43:14,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 210 transitions, 3177 flow [2024-02-07 14:43:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-02-07 14:43:14,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-02-07 14:43:14,202 INFO L175 Difference]: Start difference. First operand has 118 places, 129 transitions, 1796 flow. Second operand 8 states and 111 transitions. [2024-02-07 14:43:14,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 210 transitions, 3177 flow [2024-02-07 14:43:14,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 210 transitions, 3095 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:14,229 INFO L231 Difference]: Finished difference. Result has 127 places, 157 transitions, 2424 flow [2024-02-07 14:43:14,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2424, PETRI_PLACES=127, PETRI_TRANSITIONS=157} [2024-02-07 14:43:14,230 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 90 predicate places. [2024-02-07 14:43:14,230 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 157 transitions, 2424 flow [2024-02-07 14:43:14,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:14,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:14,231 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 14:43:14,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-02-07 14:43:14,231 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:14,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash 489360034, now seen corresponding path program 4 times [2024-02-07 14:43:14,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:14,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582246661] [2024-02-07 14:43:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:14,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:14,260 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 14:43:14,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:14,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582246661] [2024-02-07 14:43:14,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582246661] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:14,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:14,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:14,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294394896] [2024-02-07 14:43:14,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:14,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:14,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:14,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:14,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:14,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:14,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 157 transitions, 2424 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:14,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:14,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:14,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:14,521 INFO L124 PetriNetUnfolderBase]: 729/1349 cut-off events. [2024-02-07 14:43:14,521 INFO L125 PetriNetUnfolderBase]: For 12823/12823 co-relation queries the response was YES. [2024-02-07 14:43:14,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8109 conditions, 1349 events. 729/1349 cut-off events. For 12823/12823 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7132 event pairs, 220 based on Foata normal form. 28/1377 useless extension candidates. Maximal degree in co-relation 7690. Up to 787 conditions per place. [2024-02-07 14:43:14,531 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 158 selfloop transitions, 63 changer transitions 2/225 dead transitions. [2024-02-07 14:43:14,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 225 transitions, 3549 flow [2024-02-07 14:43:14,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-02-07 14:43:14,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-02-07 14:43:14,532 INFO L175 Difference]: Start difference. First operand has 127 places, 157 transitions, 2424 flow. Second operand 8 states and 134 transitions. [2024-02-07 14:43:14,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 225 transitions, 3549 flow [2024-02-07 14:43:14,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 225 transitions, 3518 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:14,565 INFO L231 Difference]: Finished difference. Result has 134 places, 168 transitions, 2771 flow [2024-02-07 14:43:14,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2771, PETRI_PLACES=134, PETRI_TRANSITIONS=168} [2024-02-07 14:43:14,565 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 97 predicate places. [2024-02-07 14:43:14,565 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 168 transitions, 2771 flow [2024-02-07 14:43:14,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:14,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:14,566 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 14:43:14,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-02-07 14:43:14,566 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:14,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash 210142610, now seen corresponding path program 6 times [2024-02-07 14:43:14,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:14,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223822565] [2024-02-07 14:43:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:14,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:14,599 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 14:43:14,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:14,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223822565] [2024-02-07 14:43:14,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223822565] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:14,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:14,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:14,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921326468] [2024-02-07 14:43:14,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:14,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:14,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:14,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:14,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:14,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:14,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 168 transitions, 2771 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:14,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:14,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:14,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:14,802 INFO L124 PetriNetUnfolderBase]: 683/1253 cut-off events. [2024-02-07 14:43:14,803 INFO L125 PetriNetUnfolderBase]: For 13778/13778 co-relation queries the response was YES. [2024-02-07 14:43:14,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8149 conditions, 1253 events. 683/1253 cut-off events. For 13778/13778 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6348 event pairs, 60 based on Foata normal form. 8/1261 useless extension candidates. Maximal degree in co-relation 8017. Up to 487 conditions per place. [2024-02-07 14:43:14,811 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 167 selfloop transitions, 31 changer transitions 2/202 dead transitions. [2024-02-07 14:43:14,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 3485 flow [2024-02-07 14:43:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:43:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:43:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-02-07 14:43:14,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-02-07 14:43:14,812 INFO L175 Difference]: Start difference. First operand has 134 places, 168 transitions, 2771 flow. Second operand 6 states and 96 transitions. [2024-02-07 14:43:14,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 3485 flow [2024-02-07 14:43:14,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 202 transitions, 3371 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:14,852 INFO L231 Difference]: Finished difference. Result has 136 places, 165 transitions, 2702 flow [2024-02-07 14:43:14,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2702, PETRI_PLACES=136, PETRI_TRANSITIONS=165} [2024-02-07 14:43:14,855 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 99 predicate places. [2024-02-07 14:43:14,855 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 165 transitions, 2702 flow [2024-02-07 14:43:14,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:14,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:14,856 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 14:43:14,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-02-07 14:43:14,856 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:14,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:14,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1490624186, now seen corresponding path program 5 times [2024-02-07 14:43:14,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:14,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175018823] [2024-02-07 14:43:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:14,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:14,890 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 14:43:14,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175018823] [2024-02-07 14:43:14,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175018823] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:14,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:14,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:14,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410947235] [2024-02-07 14:43:14,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:14,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:14,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:14,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:14,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 165 transitions, 2702 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:14,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:14,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:14,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:15,157 INFO L124 PetriNetUnfolderBase]: 688/1262 cut-off events. [2024-02-07 14:43:15,158 INFO L125 PetriNetUnfolderBase]: For 13744/13744 co-relation queries the response was YES. [2024-02-07 14:43:15,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 1262 events. 688/1262 cut-off events. For 13744/13744 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6400 event pairs, 134 based on Foata normal form. 6/1268 useless extension candidates. Maximal degree in co-relation 7503. Up to 423 conditions per place. [2024-02-07 14:43:15,167 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 171 selfloop transitions, 46 changer transitions 4/223 dead transitions. [2024-02-07 14:43:15,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 223 transitions, 3716 flow [2024-02-07 14:43:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-02-07 14:43:15,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-02-07 14:43:15,169 INFO L175 Difference]: Start difference. First operand has 136 places, 165 transitions, 2702 flow. Second operand 8 states and 129 transitions. [2024-02-07 14:43:15,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 223 transitions, 3716 flow [2024-02-07 14:43:15,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 223 transitions, 3592 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:15,216 INFO L231 Difference]: Finished difference. Result has 139 places, 171 transitions, 2814 flow [2024-02-07 14:43:15,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2575, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2814, PETRI_PLACES=139, PETRI_TRANSITIONS=171} [2024-02-07 14:43:15,218 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 102 predicate places. [2024-02-07 14:43:15,218 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 171 transitions, 2814 flow [2024-02-07 14:43:15,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:15,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:15,218 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 14:43:15,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-02-07 14:43:15,219 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:15,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:15,219 INFO L85 PathProgramCache]: Analyzing trace with hash 924964018, now seen corresponding path program 6 times [2024-02-07 14:43:15,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:15,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587780496] [2024-02-07 14:43:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:15,265 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 14:43:15,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587780496] [2024-02-07 14:43:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587780496] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:15,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:15,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:43:15,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581169349] [2024-02-07 14:43:15,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:43:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:43:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:43:15,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:15,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 171 transitions, 2814 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:15,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:15,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:15,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:15,463 INFO L124 PetriNetUnfolderBase]: 651/1183 cut-off events. [2024-02-07 14:43:15,464 INFO L125 PetriNetUnfolderBase]: For 13598/13598 co-relation queries the response was YES. [2024-02-07 14:43:15,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7822 conditions, 1183 events. 651/1183 cut-off events. For 13598/13598 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5865 event pairs, 160 based on Foata normal form. 4/1187 useless extension candidates. Maximal degree in co-relation 7503. Up to 431 conditions per place. [2024-02-07 14:43:15,472 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 146 selfloop transitions, 37 changer transitions 7/192 dead transitions. [2024-02-07 14:43:15,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 192 transitions, 3353 flow [2024-02-07 14:43:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:43:15,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:43:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-02-07 14:43:15,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-02-07 14:43:15,474 INFO L175 Difference]: Start difference. First operand has 139 places, 171 transitions, 2814 flow. Second operand 7 states and 95 transitions. [2024-02-07 14:43:15,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 192 transitions, 3353 flow [2024-02-07 14:43:15,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 192 transitions, 3308 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:15,511 INFO L231 Difference]: Finished difference. Result has 145 places, 167 transitions, 2781 flow [2024-02-07 14:43:15,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2781, PETRI_PLACES=145, PETRI_TRANSITIONS=167} [2024-02-07 14:43:15,512 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 108 predicate places. [2024-02-07 14:43:15,512 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 167 transitions, 2781 flow [2024-02-07 14:43:15,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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 14:43:15,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:15,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:15,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-02-07 14:43:15,512 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:15,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash -432272689, now seen corresponding path program 1 times [2024-02-07 14:43:15,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:15,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779567625] [2024-02-07 14:43:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:15,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:15,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:15,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779567625] [2024-02-07 14:43:15,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779567625] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:15,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496502587] [2024-02-07 14:43:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:15,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:15,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:15,625 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 14:43:15,656 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 14:43:15,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:15,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:15,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:15,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:15,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496502587] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:15,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:15,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359447161] [2024-02-07 14:43:15,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:15,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:15,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:16,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:16,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 167 transitions, 2781 flow. Second operand has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 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 14:43:16,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:16,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:16,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:16,604 INFO L124 PetriNetUnfolderBase]: 668/1242 cut-off events. [2024-02-07 14:43:16,604 INFO L125 PetriNetUnfolderBase]: For 12858/12858 co-relation queries the response was YES. [2024-02-07 14:43:16,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7966 conditions, 1242 events. 668/1242 cut-off events. For 12858/12858 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6309 event pairs, 27 based on Foata normal form. 1/1243 useless extension candidates. Maximal degree in co-relation 7710. Up to 299 conditions per place. [2024-02-07 14:43:16,616 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 81 selfloop transitions, 122 changer transitions 53/258 dead transitions. [2024-02-07 14:43:16,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 258 transitions, 4209 flow [2024-02-07 14:43:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:43:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:43:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 193 transitions. [2024-02-07 14:43:16,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3243697478991597 [2024-02-07 14:43:16,617 INFO L175 Difference]: Start difference. First operand has 145 places, 167 transitions, 2781 flow. Second operand 17 states and 193 transitions. [2024-02-07 14:43:16,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 258 transitions, 4209 flow [2024-02-07 14:43:16,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 258 transitions, 4105 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:16,653 INFO L231 Difference]: Finished difference. Result has 161 places, 178 transitions, 3281 flow [2024-02-07 14:43:16,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3281, PETRI_PLACES=161, PETRI_TRANSITIONS=178} [2024-02-07 14:43:16,654 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2024-02-07 14:43:16,654 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 178 transitions, 3281 flow [2024-02-07 14:43:16,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 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 14:43:16,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:16,654 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, 1, 1] [2024-02-07 14:43:16,668 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 14:43:16,866 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,SelfDestructingSolverStorable30 [2024-02-07 14:43:16,867 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:16,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:16,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1533838905, now seen corresponding path program 2 times [2024-02-07 14:43:16,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:16,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500753398] [2024-02-07 14:43:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:16,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:16,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500753398] [2024-02-07 14:43:16,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500753398] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:16,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750631248] [2024-02-07 14:43:16,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:16,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:16,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:16,971 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 14:43:16,973 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 14:43:17,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:17,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:17,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:17,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:17,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750631248] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:17,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:17,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:17,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785054810] [2024-02-07 14:43:17,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:17,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:17,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:17,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:17,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:17,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:17,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 178 transitions, 3281 flow. Second operand has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 23 states have internal predecessors, (168), 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 14:43:17,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:17,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:17,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:18,133 INFO L124 PetriNetUnfolderBase]: 685/1283 cut-off events. [2024-02-07 14:43:18,134 INFO L125 PetriNetUnfolderBase]: For 14634/14634 co-relation queries the response was YES. [2024-02-07 14:43:18,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8955 conditions, 1283 events. 685/1283 cut-off events. For 14634/14634 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6625 event pairs, 25 based on Foata normal form. 3/1286 useless extension candidates. Maximal degree in co-relation 8887. Up to 261 conditions per place. [2024-02-07 14:43:18,149 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 103 selfloop transitions, 165 changer transitions 20/290 dead transitions. [2024-02-07 14:43:18,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 290 transitions, 5285 flow [2024-02-07 14:43:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-07 14:43:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-07 14:43:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 245 transitions. [2024-02-07 14:43:18,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30434782608695654 [2024-02-07 14:43:18,151 INFO L175 Difference]: Start difference. First operand has 161 places, 178 transitions, 3281 flow. Second operand 23 states and 245 transitions. [2024-02-07 14:43:18,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 290 transitions, 5285 flow [2024-02-07 14:43:18,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 290 transitions, 5052 flow, removed 42 selfloop flow, removed 13 redundant places. [2024-02-07 14:43:18,224 INFO L231 Difference]: Finished difference. Result has 168 places, 221 transitions, 4315 flow [2024-02-07 14:43:18,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4315, PETRI_PLACES=168, PETRI_TRANSITIONS=221} [2024-02-07 14:43:18,225 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 131 predicate places. [2024-02-07 14:43:18,225 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 221 transitions, 4315 flow [2024-02-07 14:43:18,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.304347826086956) internal successors, (168), 23 states have internal predecessors, (168), 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 14:43:18,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:18,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:18,238 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 14:43:18,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:18,438 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:18,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash -870914065, now seen corresponding path program 3 times [2024-02-07 14:43:18,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:18,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316081008] [2024-02-07 14:43:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:18,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:18,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:18,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316081008] [2024-02-07 14:43:18,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316081008] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:18,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030456075] [2024-02-07 14:43:18,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:18,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:18,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:18,592 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 14:43:18,611 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 14:43:18,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:43:18,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:18,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:18,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:18,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:18,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030456075] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:18,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:18,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:18,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745709300] [2024-02-07 14:43:18,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:18,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:18,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:19,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:19,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 221 transitions, 4315 flow. Second operand has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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 14:43:19,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:19,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:19,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:19,897 INFO L124 PetriNetUnfolderBase]: 868/1564 cut-off events. [2024-02-07 14:43:19,897 INFO L125 PetriNetUnfolderBase]: For 20768/20768 co-relation queries the response was YES. [2024-02-07 14:43:19,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12446 conditions, 1564 events. 868/1564 cut-off events. For 20768/20768 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 8355 event pairs, 23 based on Foata normal form. 18/1582 useless extension candidates. Maximal degree in co-relation 12383. Up to 311 conditions per place. [2024-02-07 14:43:19,908 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 123 selfloop transitions, 172 changer transitions 106/403 dead transitions. [2024-02-07 14:43:19,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 403 transitions, 7999 flow [2024-02-07 14:43:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-07 14:43:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-07 14:43:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 283 transitions. [2024-02-07 14:43:19,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32342857142857145 [2024-02-07 14:43:19,910 INFO L175 Difference]: Start difference. First operand has 168 places, 221 transitions, 4315 flow. Second operand 25 states and 283 transitions. [2024-02-07 14:43:19,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 403 transitions, 7999 flow [2024-02-07 14:43:19,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 403 transitions, 7419 flow, removed 46 selfloop flow, removed 12 redundant places. [2024-02-07 14:43:19,969 INFO L231 Difference]: Finished difference. Result has 188 places, 246 transitions, 5000 flow [2024-02-07 14:43:19,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5000, PETRI_PLACES=188, PETRI_TRANSITIONS=246} [2024-02-07 14:43:19,970 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 151 predicate places. [2024-02-07 14:43:19,970 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 246 transitions, 5000 flow [2024-02-07 14:43:19,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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 14:43:19,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:19,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:19,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-07 14:43:20,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:20,180 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:20,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:20,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1235245927, now seen corresponding path program 4 times [2024-02-07 14:43:20,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:20,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065869333] [2024-02-07 14:43:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:20,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:20,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:20,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065869333] [2024-02-07 14:43:20,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065869333] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:20,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120948101] [2024-02-07 14:43:20,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:43:20,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:20,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:20,321 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 14:43:20,344 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 14:43:20,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:43:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:20,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:20,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:20,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:20,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120948101] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:20,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:20,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:20,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216555799] [2024-02-07 14:43:20,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:20,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:20,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:20,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:20,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 246 transitions, 5000 flow. Second operand has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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 14:43:20,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:20,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:20,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:21,764 INFO L124 PetriNetUnfolderBase]: 972/1696 cut-off events. [2024-02-07 14:43:21,765 INFO L125 PetriNetUnfolderBase]: For 25407/25407 co-relation queries the response was YES. [2024-02-07 14:43:21,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14423 conditions, 1696 events. 972/1696 cut-off events. For 25407/25407 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 8894 event pairs, 27 based on Foata normal form. 2/1698 useless extension candidates. Maximal degree in co-relation 14351. Up to 327 conditions per place. [2024-02-07 14:43:21,781 INFO L140 encePairwiseOnDemand]: 21/35 looper letters, 95 selfloop transitions, 329 changer transitions 20/446 dead transitions. [2024-02-07 14:43:21,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 446 transitions, 9183 flow [2024-02-07 14:43:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-07 14:43:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-07 14:43:21,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 359 transitions. [2024-02-07 14:43:21,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2699248120300752 [2024-02-07 14:43:21,783 INFO L175 Difference]: Start difference. First operand has 188 places, 246 transitions, 5000 flow. Second operand 38 states and 359 transitions. [2024-02-07 14:43:21,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 446 transitions, 9183 flow [2024-02-07 14:43:21,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 446 transitions, 8404 flow, removed 111 selfloop flow, removed 21 redundant places. [2024-02-07 14:43:21,890 INFO L231 Difference]: Finished difference. Result has 196 places, 370 transitions, 7511 flow [2024-02-07 14:43:21,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7511, PETRI_PLACES=196, PETRI_TRANSITIONS=370} [2024-02-07 14:43:21,891 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 159 predicate places. [2024-02-07 14:43:21,891 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 370 transitions, 7511 flow [2024-02-07 14:43:21,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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 14:43:21,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:21,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:21,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-02-07 14:43:22,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-02-07 14:43:22,103 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:22,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:22,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1301736955, now seen corresponding path program 5 times [2024-02-07 14:43:22,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:22,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237248289] [2024-02-07 14:43:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:22,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:22,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:22,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237248289] [2024-02-07 14:43:22,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237248289] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:22,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322427388] [2024-02-07 14:43:22,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:22,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:22,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:22,195 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 14:43:22,196 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 14:43:22,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-07 14:43:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:22,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:43:22,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:22,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:22,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322427388] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:22,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:22,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2024-02-07 14:43:22,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503841462] [2024-02-07 14:43:22,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 14:43:22,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 14:43:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-02-07 14:43:22,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:22,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 370 transitions, 7511 flow. Second operand has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 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 14:43:22,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:22,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:22,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:23,144 INFO L124 PetriNetUnfolderBase]: 961/1675 cut-off events. [2024-02-07 14:43:23,145 INFO L125 PetriNetUnfolderBase]: For 21137/21137 co-relation queries the response was YES. [2024-02-07 14:43:23,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14220 conditions, 1675 events. 961/1675 cut-off events. For 21137/21137 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 8705 event pairs, 33 based on Foata normal form. 2/1677 useless extension candidates. Maximal degree in co-relation 14155. Up to 322 conditions per place. [2024-02-07 14:43:23,156 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 43 selfloop transitions, 80 changer transitions 304/429 dead transitions. [2024-02-07 14:43:23,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 429 transitions, 9010 flow [2024-02-07 14:43:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:43:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:43:23,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 189 transitions. [2024-02-07 14:43:23,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3176470588235294 [2024-02-07 14:43:23,158 INFO L175 Difference]: Start difference. First operand has 196 places, 370 transitions, 7511 flow. Second operand 17 states and 189 transitions. [2024-02-07 14:43:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 429 transitions, 9010 flow [2024-02-07 14:43:23,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 429 transitions, 8364 flow, removed 127 selfloop flow, removed 13 redundant places. [2024-02-07 14:43:23,240 INFO L231 Difference]: Finished difference. Result has 196 places, 110 transitions, 2048 flow [2024-02-07 14:43:23,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=6917, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2048, PETRI_PLACES=196, PETRI_TRANSITIONS=110} [2024-02-07 14:43:23,240 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 159 predicate places. [2024-02-07 14:43:23,241 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 110 transitions, 2048 flow [2024-02-07 14:43:23,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 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 14:43:23,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:23,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:23,263 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 14:43:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:23,453 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:23,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1461050257, now seen corresponding path program 6 times [2024-02-07 14:43:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:23,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315180303] [2024-02-07 14:43:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:23,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:23,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:23,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315180303] [2024-02-07 14:43:23,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315180303] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:23,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250171658] [2024-02-07 14:43:23,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:43:23,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:23,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:23,580 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 14:43:23,604 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 14:43:23,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 14:43:23,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:23,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:23,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:23,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:23,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250171658] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:23,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:23,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:23,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528859901] [2024-02-07 14:43:23,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:23,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:23,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:23,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:23,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:23,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:23,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 110 transitions, 2048 flow. Second operand has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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 14:43:23,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:23,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:23,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:24,501 INFO L124 PetriNetUnfolderBase]: 444/864 cut-off events. [2024-02-07 14:43:24,501 INFO L125 PetriNetUnfolderBase]: For 9932/9932 co-relation queries the response was YES. [2024-02-07 14:43:24,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5965 conditions, 864 events. 444/864 cut-off events. For 9932/9932 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4248 event pairs, 15 based on Foata normal form. 24/888 useless extension candidates. Maximal degree in co-relation 5920. Up to 212 conditions per place. [2024-02-07 14:43:24,506 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 74 selfloop transitions, 103 changer transitions 14/193 dead transitions. [2024-02-07 14:43:24,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 193 transitions, 3457 flow [2024-02-07 14:43:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-07 14:43:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-07 14:43:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 248 transitions. [2024-02-07 14:43:24,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2834285714285714 [2024-02-07 14:43:24,508 INFO L175 Difference]: Start difference. First operand has 196 places, 110 transitions, 2048 flow. Second operand 25 states and 248 transitions. [2024-02-07 14:43:24,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 193 transitions, 3457 flow [2024-02-07 14:43:24,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 193 transitions, 2785 flow, removed 77 selfloop flow, removed 31 redundant places. [2024-02-07 14:43:24,526 INFO L231 Difference]: Finished difference. Result has 153 places, 142 transitions, 2430 flow [2024-02-07 14:43:24,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2430, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2024-02-07 14:43:24,527 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 116 predicate places. [2024-02-07 14:43:24,527 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 2430 flow [2024-02-07 14:43:24,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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 14:43:24,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:24,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:24,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-02-07 14:43:24,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:24,741 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:24,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:24,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1812798537, now seen corresponding path program 7 times [2024-02-07 14:43:24,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:24,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244834019] [2024-02-07 14:43:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:24,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:24,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:24,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244834019] [2024-02-07 14:43:24,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244834019] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:24,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849279058] [2024-02-07 14:43:24,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:43:24,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:24,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:24,848 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 14:43:24,872 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 14:43:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:24,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:24,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:25,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:25,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849279058] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:25,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:25,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:25,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304354654] [2024-02-07 14:43:25,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:25,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:25,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 2430 flow. Second operand has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 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 14:43:25,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:25,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:25,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:25,944 INFO L124 PetriNetUnfolderBase]: 456/898 cut-off events. [2024-02-07 14:43:25,945 INFO L125 PetriNetUnfolderBase]: For 6899/6899 co-relation queries the response was YES. [2024-02-07 14:43:25,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5627 conditions, 898 events. 456/898 cut-off events. For 6899/6899 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4546 event pairs, 27 based on Foata normal form. 4/902 useless extension candidates. Maximal degree in co-relation 5586. Up to 283 conditions per place. [2024-02-07 14:43:25,952 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 92 selfloop transitions, 101 changer transitions 21/216 dead transitions. [2024-02-07 14:43:25,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 216 transitions, 3320 flow [2024-02-07 14:43:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-07 14:43:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-07 14:43:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 292 transitions. [2024-02-07 14:43:25,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2780952380952381 [2024-02-07 14:43:25,970 INFO L175 Difference]: Start difference. First operand has 153 places, 142 transitions, 2430 flow. Second operand 30 states and 292 transitions. [2024-02-07 14:43:25,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 216 transitions, 3320 flow [2024-02-07 14:43:25,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 216 transitions, 3147 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-02-07 14:43:25,992 INFO L231 Difference]: Finished difference. Result has 177 places, 146 transitions, 2549 flow [2024-02-07 14:43:25,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2268, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2549, PETRI_PLACES=177, PETRI_TRANSITIONS=146} [2024-02-07 14:43:25,993 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 140 predicate places. [2024-02-07 14:43:25,994 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 146 transitions, 2549 flow [2024-02-07 14:43:25,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 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 14:43:25,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:25,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:26,008 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 14:43:26,208 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,SelfDestructingSolverStorable36 [2024-02-07 14:43:26,208 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:26,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:26,209 INFO L85 PathProgramCache]: Analyzing trace with hash 139548065, now seen corresponding path program 8 times [2024-02-07 14:43:26,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:26,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578438618] [2024-02-07 14:43:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:26,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:26,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578438618] [2024-02-07 14:43:26,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578438618] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:26,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576642600] [2024-02-07 14:43:26,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:26,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:26,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:26,304 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 14:43:26,344 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 14:43:26,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:26,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:26,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:26,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:26,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:26,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576642600] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:26,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:26,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:26,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503297699] [2024-02-07 14:43:26,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:26,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:26,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:26,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:26,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 146 transitions, 2549 flow. Second operand has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 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 14:43:26,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:26,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:26,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:27,457 INFO L124 PetriNetUnfolderBase]: 441/873 cut-off events. [2024-02-07 14:43:27,458 INFO L125 PetriNetUnfolderBase]: For 6763/6763 co-relation queries the response was YES. [2024-02-07 14:43:27,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5589 conditions, 873 events. 441/873 cut-off events. For 6763/6763 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4395 event pairs, 23 based on Foata normal form. 2/875 useless extension candidates. Maximal degree in co-relation 5545. Up to 259 conditions per place. [2024-02-07 14:43:27,463 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 81 selfloop transitions, 81 changer transitions 55/219 dead transitions. [2024-02-07 14:43:27,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 219 transitions, 3294 flow [2024-02-07 14:43:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-07 14:43:27,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-07 14:43:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 301 transitions. [2024-02-07 14:43:27,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27741935483870966 [2024-02-07 14:43:27,481 INFO L175 Difference]: Start difference. First operand has 177 places, 146 transitions, 2549 flow. Second operand 31 states and 301 transitions. [2024-02-07 14:43:27,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 219 transitions, 3294 flow [2024-02-07 14:43:27,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 219 transitions, 3030 flow, removed 20 selfloop flow, removed 21 redundant places. [2024-02-07 14:43:27,502 INFO L231 Difference]: Finished difference. Result has 187 places, 127 transitions, 2143 flow [2024-02-07 14:43:27,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2143, PETRI_PLACES=187, PETRI_TRANSITIONS=127} [2024-02-07 14:43:27,502 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 150 predicate places. [2024-02-07 14:43:27,503 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 127 transitions, 2143 flow [2024-02-07 14:43:27,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 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 14:43:27,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:27,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:27,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:27,714 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,SelfDestructingSolverStorable37 [2024-02-07 14:43:27,714 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:27,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:27,715 INFO L85 PathProgramCache]: Analyzing trace with hash -942626907, now seen corresponding path program 9 times [2024-02-07 14:43:27,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:27,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585562853] [2024-02-07 14:43:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:27,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:27,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585562853] [2024-02-07 14:43:27,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585562853] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368869885] [2024-02-07 14:43:27,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:27,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:27,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:27,814 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 14:43:27,816 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 14:43:27,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:43:27,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:27,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:27,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:27,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368869885] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:28,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:28,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909430610] [2024-02-07 14:43:28,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:28,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:28,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:28,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:28,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:28,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:28,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 127 transitions, 2143 flow. Second operand has 23 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 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 14:43:28,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:28,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:28,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:28,714 INFO L124 PetriNetUnfolderBase]: 373/733 cut-off events. [2024-02-07 14:43:28,714 INFO L125 PetriNetUnfolderBase]: For 5822/5822 co-relation queries the response was YES. [2024-02-07 14:43:28,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4809 conditions, 733 events. 373/733 cut-off events. For 5822/5822 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3437 event pairs, 17 based on Foata normal form. 9/742 useless extension candidates. Maximal degree in co-relation 4764. Up to 154 conditions per place. [2024-02-07 14:43:28,719 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 57 selfloop transitions, 89 changer transitions 32/180 dead transitions. [2024-02-07 14:43:28,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 180 transitions, 2780 flow [2024-02-07 14:43:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 14:43:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 14:43:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 242 transitions. [2024-02-07 14:43:28,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26593406593406593 [2024-02-07 14:43:28,721 INFO L175 Difference]: Start difference. First operand has 187 places, 127 transitions, 2143 flow. Second operand 26 states and 242 transitions. [2024-02-07 14:43:28,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 180 transitions, 2780 flow [2024-02-07 14:43:28,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 180 transitions, 2516 flow, removed 23 selfloop flow, removed 34 redundant places. [2024-02-07 14:43:28,741 INFO L231 Difference]: Finished difference. Result has 164 places, 118 transitions, 1966 flow [2024-02-07 14:43:28,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1966, PETRI_PLACES=164, PETRI_TRANSITIONS=118} [2024-02-07 14:43:28,743 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 127 predicate places. [2024-02-07 14:43:28,743 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 118 transitions, 1966 flow [2024-02-07 14:43:28,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 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 14:43:28,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:28,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:28,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-02-07 14:43:28,954 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,SelfDestructingSolverStorable38 [2024-02-07 14:43:28,955 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:28,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:28,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2064086585, now seen corresponding path program 10 times [2024-02-07 14:43:28,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:28,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914988925] [2024-02-07 14:43:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:28,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:29,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:29,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914988925] [2024-02-07 14:43:29,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914988925] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:29,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270043079] [2024-02-07 14:43:29,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:43:29,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:29,079 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 14:43:29,080 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 14:43:29,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:43:29,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:29,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:29,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:29,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:29,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270043079] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:29,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:29,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:29,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916369260] [2024-02-07 14:43:29,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:29,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:29,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:29,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:29,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:29,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:29,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 118 transitions, 1966 flow. Second operand has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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 14:43:29,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:29,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:29,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:29,842 INFO L124 PetriNetUnfolderBase]: 330/662 cut-off events. [2024-02-07 14:43:29,842 INFO L125 PetriNetUnfolderBase]: For 4876/4876 co-relation queries the response was YES. [2024-02-07 14:43:29,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4214 conditions, 662 events. 330/662 cut-off events. For 4876/4876 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3027 event pairs, 11 based on Foata normal form. 2/664 useless extension candidates. Maximal degree in co-relation 4176. Up to 172 conditions per place. [2024-02-07 14:43:29,846 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 55 selfloop transitions, 90 changer transitions 10/157 dead transitions. [2024-02-07 14:43:29,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 157 transitions, 2458 flow [2024-02-07 14:43:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:43:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:43:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 159 transitions. [2024-02-07 14:43:29,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2839285714285714 [2024-02-07 14:43:29,847 INFO L175 Difference]: Start difference. First operand has 164 places, 118 transitions, 1966 flow. Second operand 16 states and 159 transitions. [2024-02-07 14:43:29,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 157 transitions, 2458 flow [2024-02-07 14:43:29,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 157 transitions, 2216 flow, removed 14 selfloop flow, removed 25 redundant places. [2024-02-07 14:43:29,861 INFO L231 Difference]: Finished difference. Result has 146 places, 119 transitions, 1952 flow [2024-02-07 14:43:29,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1735, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1952, PETRI_PLACES=146, PETRI_TRANSITIONS=119} [2024-02-07 14:43:29,862 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 109 predicate places. [2024-02-07 14:43:29,862 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 119 transitions, 1952 flow [2024-02-07 14:43:29,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.086956521739131) internal successors, (163), 23 states have internal predecessors, (163), 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 14:43:29,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:29,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:29,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-02-07 14:43:30,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-02-07 14:43:30,074 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:30,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:30,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1367021585, now seen corresponding path program 11 times [2024-02-07 14:43:30,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:30,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321789836] [2024-02-07 14:43:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:30,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:30,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:30,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321789836] [2024-02-07 14:43:30,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321789836] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:30,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773551701] [2024-02-07 14:43:30,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:30,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:30,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:30,170 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 14:43:30,172 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 14:43:30,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:30,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:30,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:30,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:30,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:30,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773551701] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:30,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:30,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:30,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150072524] [2024-02-07 14:43:30,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:30,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:30,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:30,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:30,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:30,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:30,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 119 transitions, 1952 flow. Second operand has 23 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 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 14:43:30,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:30,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:30,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:31,223 INFO L124 PetriNetUnfolderBase]: 455/889 cut-off events. [2024-02-07 14:43:31,223 INFO L125 PetriNetUnfolderBase]: For 6309/6309 co-relation queries the response was YES. [2024-02-07 14:43:31,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5691 conditions, 889 events. 455/889 cut-off events. For 6309/6309 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4396 event pairs, 11 based on Foata normal form. 2/891 useless extension candidates. Maximal degree in co-relation 5660. Up to 184 conditions per place. [2024-02-07 14:43:31,229 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 65 selfloop transitions, 116 changer transitions 45/228 dead transitions. [2024-02-07 14:43:31,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 228 transitions, 3499 flow [2024-02-07 14:43:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-07 14:43:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-07 14:43:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 271 transitions. [2024-02-07 14:43:31,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2867724867724868 [2024-02-07 14:43:31,231 INFO L175 Difference]: Start difference. First operand has 146 places, 119 transitions, 1952 flow. Second operand 27 states and 271 transitions. [2024-02-07 14:43:31,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 228 transitions, 3499 flow [2024-02-07 14:43:31,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 228 transitions, 3240 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-02-07 14:43:31,252 INFO L231 Difference]: Finished difference. Result has 161 places, 140 transitions, 2331 flow [2024-02-07 14:43:31,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1800, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2331, PETRI_PLACES=161, PETRI_TRANSITIONS=140} [2024-02-07 14:43:31,253 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2024-02-07 14:43:31,253 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 140 transitions, 2331 flow [2024-02-07 14:43:31,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 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 14:43:31,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:31,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:31,265 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 14:43:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:31,465 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:31,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:31,465 INFO L85 PathProgramCache]: Analyzing trace with hash -652582511, now seen corresponding path program 12 times [2024-02-07 14:43:31,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:31,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6658583] [2024-02-07 14:43:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:31,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:31,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:31,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6658583] [2024-02-07 14:43:31,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6658583] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:31,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214500026] [2024-02-07 14:43:31,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:43:31,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:31,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:31,648 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 14:43:31,673 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 14:43:31,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-07 14:43:31,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:31,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:43:31,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:31,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:43:31,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214500026] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:31,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:43:31,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2024-02-07 14:43:31,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150884866] [2024-02-07 14:43:31,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:31,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:31,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:31,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:43:31,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:31,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 140 transitions, 2331 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:31,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:31,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:31,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:31,979 INFO L124 PetriNetUnfolderBase]: 393/795 cut-off events. [2024-02-07 14:43:31,979 INFO L125 PetriNetUnfolderBase]: For 5036/5036 co-relation queries the response was YES. [2024-02-07 14:43:31,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5151 conditions, 795 events. 393/795 cut-off events. For 5036/5036 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3903 event pairs, 52 based on Foata normal form. 2/797 useless extension candidates. Maximal degree in co-relation 5118. Up to 250 conditions per place. [2024-02-07 14:43:31,983 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 96 selfloop transitions, 44 changer transitions 32/174 dead transitions. [2024-02-07 14:43:31,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 174 transitions, 3048 flow [2024-02-07 14:43:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-02-07 14:43:31,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-02-07 14:43:31,986 INFO L175 Difference]: Start difference. First operand has 161 places, 140 transitions, 2331 flow. Second operand 8 states and 104 transitions. [2024-02-07 14:43:31,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 174 transitions, 3048 flow [2024-02-07 14:43:32,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 174 transitions, 2856 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-02-07 14:43:32,006 INFO L231 Difference]: Finished difference. Result has 156 places, 132 transitions, 2207 flow [2024-02-07 14:43:32,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2207, PETRI_PLACES=156, PETRI_TRANSITIONS=132} [2024-02-07 14:43:32,006 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 119 predicate places. [2024-02-07 14:43:32,007 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 132 transitions, 2207 flow [2024-02-07 14:43:32,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:32,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:32,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:32,020 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 14:43:32,218 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,SelfDestructingSolverStorable41 [2024-02-07 14:43:32,218 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:32,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash 576300253, now seen corresponding path program 13 times [2024-02-07 14:43:32,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:32,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705680194] [2024-02-07 14:43:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:32,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:32,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:32,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705680194] [2024-02-07 14:43:32,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705680194] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:32,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659801204] [2024-02-07 14:43:32,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:43:32,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:32,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:32,303 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 14:43:32,304 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 14:43:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:32,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:32,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:32,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:32,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:32,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659801204] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:32,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:32,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:32,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758285791] [2024-02-07 14:43:32,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:32,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:32,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:32,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:32,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:32,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:32,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 132 transitions, 2207 flow. Second operand has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 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 14:43:32,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:32,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:32,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:32,986 INFO L124 PetriNetUnfolderBase]: 352/714 cut-off events. [2024-02-07 14:43:32,986 INFO L125 PetriNetUnfolderBase]: For 4556/4556 co-relation queries the response was YES. [2024-02-07 14:43:32,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4590 conditions, 714 events. 352/714 cut-off events. For 4556/4556 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3403 event pairs, 23 based on Foata normal form. 1/715 useless extension candidates. Maximal degree in co-relation 4558. Up to 182 conditions per place. [2024-02-07 14:43:32,989 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 46 selfloop transitions, 84 changer transitions 33/165 dead transitions. [2024-02-07 14:43:32,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 165 transitions, 2684 flow [2024-02-07 14:43:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:43:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:43:32,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 147 transitions. [2024-02-07 14:43:32,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28 [2024-02-07 14:43:32,991 INFO L175 Difference]: Start difference. First operand has 156 places, 132 transitions, 2207 flow. Second operand 15 states and 147 transitions. [2024-02-07 14:43:32,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 165 transitions, 2684 flow [2024-02-07 14:43:33,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 165 transitions, 2604 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-02-07 14:43:33,006 INFO L231 Difference]: Finished difference. Result has 165 places, 116 transitions, 2001 flow [2024-02-07 14:43:33,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2001, PETRI_PLACES=165, PETRI_TRANSITIONS=116} [2024-02-07 14:43:33,007 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 128 predicate places. [2024-02-07 14:43:33,007 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 116 transitions, 2001 flow [2024-02-07 14:43:33,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 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 14:43:33,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:33,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:33,032 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 14:43:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:33,219 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:33,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash -612755665, now seen corresponding path program 14 times [2024-02-07 14:43:33,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:33,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715125386] [2024-02-07 14:43:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:33,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:33,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715125386] [2024-02-07 14:43:33,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715125386] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:33,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397519179] [2024-02-07 14:43:33,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:43:33,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:33,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:33,361 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 14:43:33,363 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 14:43:33,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:43:33,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:33,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:33,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:33,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:33,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397519179] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:33,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:33,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:33,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095439196] [2024-02-07 14:43:33,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:33,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:33,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:33,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:33,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:33,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 116 transitions, 2001 flow. Second operand has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 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 14:43:33,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:33,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:33,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:34,344 INFO L124 PetriNetUnfolderBase]: 402/822 cut-off events. [2024-02-07 14:43:34,345 INFO L125 PetriNetUnfolderBase]: For 6133/6133 co-relation queries the response was YES. [2024-02-07 14:43:34,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5705 conditions, 822 events. 402/822 cut-off events. For 6133/6133 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4128 event pairs, 27 based on Foata normal form. 2/824 useless extension candidates. Maximal degree in co-relation 5673. Up to 194 conditions per place. [2024-02-07 14:43:34,349 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 77 selfloop transitions, 101 changer transitions 51/231 dead transitions. [2024-02-07 14:43:34,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 231 transitions, 4085 flow [2024-02-07 14:43:34,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-07 14:43:34,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-07 14:43:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 227 transitions. [2024-02-07 14:43:34,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2948051948051948 [2024-02-07 14:43:34,352 INFO L175 Difference]: Start difference. First operand has 165 places, 116 transitions, 2001 flow. Second operand 22 states and 227 transitions. [2024-02-07 14:43:34,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 231 transitions, 4085 flow [2024-02-07 14:43:34,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 231 transitions, 3731 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-02-07 14:43:34,378 INFO L231 Difference]: Finished difference. Result has 173 places, 149 transitions, 2730 flow [2024-02-07 14:43:34,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2730, PETRI_PLACES=173, PETRI_TRANSITIONS=149} [2024-02-07 14:43:34,379 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 136 predicate places. [2024-02-07 14:43:34,379 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 149 transitions, 2730 flow [2024-02-07 14:43:34,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.173913043478261) internal successors, (165), 23 states have internal predecessors, (165), 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 14:43:34,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:34,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:34,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-02-07 14:43:34,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:34,590 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:34,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 908099213, now seen corresponding path program 15 times [2024-02-07 14:43:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26780059] [2024-02-07 14:43:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:34,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:34,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26780059] [2024-02-07 14:43:34,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26780059] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:34,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206983280] [2024-02-07 14:43:34,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:43:34,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:34,712 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 14:43:34,715 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 14:43:34,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:43:34,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:34,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:34,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:34,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:35,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206983280] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:35,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:35,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:35,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465240249] [2024-02-07 14:43:35,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:35,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:35,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:35,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:35,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 149 transitions, 2730 flow. Second operand has 23 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 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 14:43:35,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:35,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:35,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:35,649 INFO L124 PetriNetUnfolderBase]: 333/675 cut-off events. [2024-02-07 14:43:35,649 INFO L125 PetriNetUnfolderBase]: For 4783/4783 co-relation queries the response was YES. [2024-02-07 14:43:35,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4775 conditions, 675 events. 333/675 cut-off events. For 4783/4783 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3130 event pairs, 17 based on Foata normal form. 2/677 useless extension candidates. Maximal degree in co-relation 4740. Up to 150 conditions per place. [2024-02-07 14:43:35,653 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 44 selfloop transitions, 73 changer transitions 69/188 dead transitions. [2024-02-07 14:43:35,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 188 transitions, 3234 flow [2024-02-07 14:43:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:43:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:43:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 165 transitions. [2024-02-07 14:43:35,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2773109243697479 [2024-02-07 14:43:35,654 INFO L175 Difference]: Start difference. First operand has 173 places, 149 transitions, 2730 flow. Second operand 17 states and 165 transitions. [2024-02-07 14:43:35,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 188 transitions, 3234 flow [2024-02-07 14:43:35,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 188 transitions, 3042 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-02-07 14:43:35,672 INFO L231 Difference]: Finished difference. Result has 175 places, 95 transitions, 1584 flow [2024-02-07 14:43:35,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2542, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1584, PETRI_PLACES=175, PETRI_TRANSITIONS=95} [2024-02-07 14:43:35,673 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 138 predicate places. [2024-02-07 14:43:35,673 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 95 transitions, 1584 flow [2024-02-07 14:43:35,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 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 14:43:35,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:35,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:35,688 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 14:43:35,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-02-07 14:43:35,886 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:35,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:35,886 INFO L85 PathProgramCache]: Analyzing trace with hash -62541009, now seen corresponding path program 16 times [2024-02-07 14:43:35,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:35,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311863885] [2024-02-07 14:43:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:35,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:35,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:35,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311863885] [2024-02-07 14:43:35,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311863885] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:35,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170958220] [2024-02-07 14:43:35,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:43:35,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:35,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:35,982 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 14:43:36,012 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 14:43:36,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:43:36,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:36,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:43:36,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:36,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:36,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170958220] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:36,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:36,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-02-07 14:43:36,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657664589] [2024-02-07 14:43:36,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:36,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:43:36,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:36,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:43:36,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:43:36,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:36,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 95 transitions, 1584 flow. Second operand has 23 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 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 14:43:36,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:36,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:36,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:36,618 INFO L124 PetriNetUnfolderBase]: 176/382 cut-off events. [2024-02-07 14:43:36,619 INFO L125 PetriNetUnfolderBase]: For 2084/2084 co-relation queries the response was YES. [2024-02-07 14:43:36,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2602 conditions, 382 events. 176/382 cut-off events. For 2084/2084 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1500 event pairs, 3 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 2571. Up to 89 conditions per place. [2024-02-07 14:43:36,621 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 27 selfloop transitions, 60 changer transitions 30/119 dead transitions. [2024-02-07 14:43:36,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 119 transitions, 1869 flow [2024-02-07 14:43:36,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:43:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:43:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 138 transitions. [2024-02-07 14:43:36,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26285714285714284 [2024-02-07 14:43:36,622 INFO L175 Difference]: Start difference. First operand has 175 places, 95 transitions, 1584 flow. Second operand 15 states and 138 transitions. [2024-02-07 14:43:36,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 119 transitions, 1869 flow [2024-02-07 14:43:36,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 119 transitions, 1409 flow, removed 8 selfloop flow, removed 38 redundant places. [2024-02-07 14:43:36,632 INFO L231 Difference]: Finished difference. Result has 143 places, 79 transitions, 1083 flow [2024-02-07 14:43:36,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1083, PETRI_PLACES=143, PETRI_TRANSITIONS=79} [2024-02-07 14:43:36,632 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 106 predicate places. [2024-02-07 14:43:36,632 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 79 transitions, 1083 flow [2024-02-07 14:43:36,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 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 14:43:36,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:36,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 14:43:36,644 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 14:43:36,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:36,845 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:36,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1176752266, now seen corresponding path program 17 times [2024-02-07 14:43:36,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:36,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577448523] [2024-02-07 14:43:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:36,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577448523] [2024-02-07 14:43:36,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577448523] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:36,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877576746] [2024-02-07 14:43:36,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:36,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:36,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:36,894 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 14:43:36,916 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 14:43:36,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-07 14:43:36,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:36,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:43:36,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:36,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:37,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877576746] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:37,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:37,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-02-07 14:43:37,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18939924] [2024-02-07 14:43:37,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:43:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:43:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:43:37,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 35 [2024-02-07 14:43:37,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 79 transitions, 1083 flow. Second operand has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 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 14:43:37,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:37,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 35 [2024-02-07 14:43:37,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:37,197 INFO L124 PetriNetUnfolderBase]: 128/300 cut-off events. [2024-02-07 14:43:37,197 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2024-02-07 14:43:37,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1820 conditions, 300 events. 128/300 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1062 event pairs, 37 based on Foata normal form. 12/312 useless extension candidates. Maximal degree in co-relation 1798. Up to 94 conditions per place. [2024-02-07 14:43:37,199 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 47 selfloop transitions, 36 changer transitions 19/104 dead transitions. [2024-02-07 14:43:37,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 104 transitions, 1462 flow [2024-02-07 14:43:37,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:43:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:43:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-02-07 14:43:37,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2897959183673469 [2024-02-07 14:43:37,200 INFO L175 Difference]: Start difference. First operand has 143 places, 79 transitions, 1083 flow. Second operand 14 states and 142 transitions. [2024-02-07 14:43:37,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 104 transitions, 1462 flow [2024-02-07 14:43:37,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 104 transitions, 1113 flow, removed 1 selfloop flow, removed 23 redundant places. [2024-02-07 14:43:37,205 INFO L231 Difference]: Finished difference. Result has 117 places, 75 transitions, 792 flow [2024-02-07 14:43:37,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=792, PETRI_PLACES=117, PETRI_TRANSITIONS=75} [2024-02-07 14:43:37,206 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 80 predicate places. [2024-02-07 14:43:37,206 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 75 transitions, 792 flow [2024-02-07 14:43:37,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 11 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 14:43:37,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:37,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:37,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:37,419 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:37,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:37,419 INFO L85 PathProgramCache]: Analyzing trace with hash -187500553, now seen corresponding path program 18 times [2024-02-07 14:43:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:37,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476714409] [2024-02-07 14:43:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:37,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476714409] [2024-02-07 14:43:37,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476714409] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:37,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686968611] [2024-02-07 14:43:37,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:43:37,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:37,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:37,572 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 14:43:37,592 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 14:43:37,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-07 14:43:37,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:37,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:43:37,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:37,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:37,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686968611] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:37,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:37,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 11] total 27 [2024-02-07 14:43:37,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792522495] [2024-02-07 14:43:37,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:37,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-02-07 14:43:37,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:37,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-02-07 14:43:37,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2024-02-07 14:43:37,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:37,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 75 transitions, 792 flow. Second operand has 28 states, 28 states have (on average 7.25) internal successors, (203), 28 states have internal predecessors, (203), 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 14:43:37,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:37,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:37,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:38,580 INFO L124 PetriNetUnfolderBase]: 149/351 cut-off events. [2024-02-07 14:43:38,580 INFO L125 PetriNetUnfolderBase]: For 344/344 co-relation queries the response was YES. [2024-02-07 14:43:38,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715 conditions, 351 events. 149/351 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1322 event pairs, 5 based on Foata normal form. 7/358 useless extension candidates. Maximal degree in co-relation 1696. Up to 84 conditions per place. [2024-02-07 14:43:38,581 INFO L140 encePairwiseOnDemand]: 22/35 looper letters, 24 selfloop transitions, 17 changer transitions 101/144 dead transitions. [2024-02-07 14:43:38,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 144 transitions, 1371 flow [2024-02-07 14:43:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-07 14:43:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-07 14:43:38,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 288 transitions. [2024-02-07 14:43:38,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23510204081632652 [2024-02-07 14:43:38,582 INFO L175 Difference]: Start difference. First operand has 117 places, 75 transitions, 792 flow. Second operand 35 states and 288 transitions. [2024-02-07 14:43:38,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 144 transitions, 1371 flow [2024-02-07 14:43:38,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 144 transitions, 1304 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-02-07 14:43:38,586 INFO L231 Difference]: Finished difference. Result has 142 places, 31 transitions, 245 flow [2024-02-07 14:43:38,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=245, PETRI_PLACES=142, PETRI_TRANSITIONS=31} [2024-02-07 14:43:38,586 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 105 predicate places. [2024-02-07 14:43:38,586 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 31 transitions, 245 flow [2024-02-07 14:43:38,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 7.25) internal successors, (203), 28 states have internal predecessors, (203), 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 14:43:38,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:38,587 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:38,600 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 14:43:38,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:38,803 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-07 14:43:38,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:38,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1705154697, now seen corresponding path program 19 times [2024-02-07 14:43:38,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:38,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295380830] [2024-02-07 14:43:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:38,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:38,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295380830] [2024-02-07 14:43:38,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295380830] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:38,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517073250] [2024-02-07 14:43:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:43:38,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:38,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:38,904 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 14:43:38,906 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 14:43:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:38,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:43:38,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:39,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:39,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517073250] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:39,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:39,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2024-02-07 14:43:39,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154493106] [2024-02-07 14:43:39,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:39,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-07 14:43:39,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:39,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-07 14:43:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2024-02-07 14:43:39,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 35 [2024-02-07 14:43:39,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 31 transitions, 245 flow. Second operand has 29 states, 29 states have (on average 7.172413793103448) internal successors, (208), 29 states have internal predecessors, (208), 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 14:43:39,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:39,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 35 [2024-02-07 14:43:39,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:39,397 INFO L124 PetriNetUnfolderBase]: 36/92 cut-off events. [2024-02-07 14:43:39,397 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-02-07 14:43:39,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 92 events. 36/92 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 146 event pairs, 0 based on Foata normal form. 1/93 useless extension candidates. Maximal degree in co-relation 415. Up to 25 conditions per place. [2024-02-07 14:43:39,398 INFO L140 encePairwiseOnDemand]: 23/35 looper letters, 0 selfloop transitions, 0 changer transitions 46/46 dead transitions. [2024-02-07 14:43:39,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 46 transitions, 365 flow [2024-02-07 14:43:39,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:43:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:43:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 120 transitions. [2024-02-07 14:43:39,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22857142857142856 [2024-02-07 14:43:39,399 INFO L175 Difference]: Start difference. First operand has 142 places, 31 transitions, 245 flow. Second operand 15 states and 120 transitions. [2024-02-07 14:43:39,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 46 transitions, 365 flow [2024-02-07 14:43:39,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 46 transitions, 220 flow, removed 6 selfloop flow, removed 42 redundant places. [2024-02-07 14:43:39,401 INFO L231 Difference]: Finished difference. Result has 66 places, 0 transitions, 0 flow [2024-02-07 14:43:39,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=66, PETRI_TRANSITIONS=0} [2024-02-07 14:43:39,402 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2024-02-07 14:43:39,402 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 0 transitions, 0 flow [2024-02-07 14:43:39,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.172413793103448) internal successors, (208), 29 states have internal predecessors, (208), 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 14:43:39,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 17 remaining) [2024-02-07 14:43:39,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 17 remaining) [2024-02-07 14:43:39,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 17 remaining) [2024-02-07 14:43:39,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 17 remaining) [2024-02-07 14:43:39,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 17 remaining) [2024-02-07 14:43:39,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 17 remaining) [2024-02-07 14:43:39,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 17 remaining) [2024-02-07 14:43:39,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 17 remaining) [2024-02-07 14:43:39,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (8 of 17 remaining) [2024-02-07 14:43:39,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 17 remaining) [2024-02-07 14:43:39,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 17 remaining) [2024-02-07 14:43:39,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 17 remaining) [2024-02-07 14:43:39,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 17 remaining) [2024-02-07 14:43:39,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 17 remaining) [2024-02-07 14:43:39,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 17 remaining) [2024-02-07 14:43:39,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 17 remaining) [2024-02-07 14:43:39,407 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 17 remaining) [2024-02-07 14:43:39,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:39,618 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,SelfDestructingSolverStorable48 [2024-02-07 14:43:39,622 INFO L445 BasicCegarLoop]: Path program histogram: [19, 9, 6, 6, 2, 2, 1, 1, 1, 1, 1] [2024-02-07 14:43:39,631 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 14:43:39,632 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 14:43:39,636 INFO L503 ceAbstractionStarter]: Automizer considered 8 witness invariants [2024-02-07 14:43:39,636 INFO L504 ceAbstractionStarter]: WitnessConsidered=8 [2024-02-07 14:43:39,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 02:43:39 BasicIcfg [2024-02-07 14:43:39,649 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 14:43:39,649 INFO L158 Benchmark]: Toolchain (without parser) took 33783.28ms. Allocated memory was 199.2MB in the beginning and 629.1MB in the end (delta: 429.9MB). Free memory was 127.3MB in the beginning and 370.2MB in the end (delta: -242.9MB). Peak memory consumption was 188.0MB. Max. memory is 16.1GB. [2024-02-07 14:43:39,649 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 199.2MB. Free memory is still 161.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:43:39,649 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 199.2MB. Free memory is still 173.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:43:39,649 INFO L158 Benchmark]: CACSL2BoogieTranslator took 282.25ms. Allocated memory is still 199.2MB. Free memory was 127.3MB in the beginning and 113.2MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-02-07 14:43:39,650 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.33ms. Allocated memory is still 199.2MB. Free memory was 113.2MB in the beginning and 111.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:43:39,650 INFO L158 Benchmark]: Boogie Preprocessor took 55.23ms. Allocated memory is still 199.2MB. Free memory was 111.5MB in the beginning and 109.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 14:43:39,650 INFO L158 Benchmark]: RCFGBuilder took 490.86ms. Allocated memory is still 199.2MB. Free memory was 109.5MB in the beginning and 84.7MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-02-07 14:43:39,650 INFO L158 Benchmark]: TraceAbstraction took 32910.04ms. Allocated memory was 199.2MB in the beginning and 629.1MB in the end (delta: 429.9MB). Free memory was 83.9MB in the beginning and 370.2MB in the end (delta: -286.3MB). Peak memory consumption was 144.0MB. Max. memory is 16.1GB. [2024-02-07 14:43:39,668 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.16ms. Allocated memory is still 199.2MB. Free memory is still 161.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 199.2MB. Free memory is still 173.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 282.25ms. Allocated memory is still 199.2MB. Free memory was 127.3MB in the beginning and 113.2MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.33ms. Allocated memory is still 199.2MB. Free memory was 113.2MB in the beginning and 111.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 55.23ms. Allocated memory is still 199.2MB. Free memory was 111.5MB in the beginning and 109.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 490.86ms. Allocated memory is still 199.2MB. Free memory was 109.5MB in the beginning and 84.7MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 32910.04ms. Allocated memory was 199.2MB in the beginning and 629.1MB in the end (delta: 429.9MB). Free memory was 83.9MB in the beginning and 370.2MB in the end (delta: -286.3MB). Peak memory consumption was 144.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 48]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 57]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 69]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 78]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 79]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 17 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 32.7s, OverallIterations: 49, TraceHistogramMax: 2, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 18.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3970 SdHoareTripleChecker+Valid, 8.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3771 mSDsluCounter, 808 SdHoareTripleChecker+Invalid, 6.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 702 mSDsCounter, 866 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19878 IncrementalHoareTripleChecker+Invalid, 20744 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 866 mSolverCounterUnsat, 106 mSDtfsCounter, 19878 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1651 GetRequests, 772 SyntacticMatches, 19 SemanticMatches, 860 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7295 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7511occurred in iteration=34, InterpolantAutomatonStates: 608, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 1472 NumberOfCodeBlocks, 1472 NumberOfCodeBlocksAsserted, 91 NumberOfCheckSat, 1848 ConstructedInterpolants, 0 QuantifiedInterpolants, 9529 SizeOfPredicates, 72 NumberOfNonLiveVariables, 2896 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 88 InterpolantComputations, 31 PerfectInterpolantSequences, 28/171 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-07 14:43:39,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE