./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-3.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/parallel-misc-3.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/parallel-misc-3.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:14:02,251 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:14:02,290 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:14:02,293 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:14:02,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:14:02,308 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:14:02,308 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:14:02,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:14:02,309 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:14:02,309 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:14:02,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:14:02,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:14:02,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:14:02,310 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:14:02,311 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:14:02,311 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:14:02,311 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:14:02,312 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:14:02,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:14:02,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:14:02,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:14:02,313 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:14:02,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:14:02,314 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:14:02,316 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:14:02,316 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:14:02,317 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:14:02,317 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:14:02,317 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:14:02,318 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:14:02,318 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:14:02,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:14:02,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:14:02,319 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:14:02,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:14:02,319 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:14:02,320 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:14:02,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:14:02,320 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:14:02,320 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:14:02,321 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:14:02,321 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:14:02,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:14:02,321 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:14:02,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:14:02,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:14:02,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:14:02,557 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:14:02,557 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:14:02,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2024-02-07 19:14:03,518 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:14:03,645 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:14:03,646 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2024-02-07 19:14:03,651 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e09fc2805/75998190423a45f0bc19f5769b7d239a/FLAG13d178714 [2024-02-07 19:14:03,660 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e09fc2805/75998190423a45f0bc19f5769b7d239a [2024-02-07 19:14:03,662 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:14:03,663 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:14:03,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/parallel-misc-3.wvr.yml/witness.yml [2024-02-07 19:14:03,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:14:03,727 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:14:03,729 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:14:03,729 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:14:03,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:14:03,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:14:03" (1/2) ... [2024-02-07 19:14:03,734 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fac846d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:14:03, skipping insertion in model container [2024-02-07 19:14:03,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:14:03" (1/2) ... [2024-02-07 19:14:03,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ee33ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:14:03, skipping insertion in model container [2024-02-07 19:14:03,735 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:14:03" (2/2) ... [2024-02-07 19:14:03,736 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fac846d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:03, skipping insertion in model container [2024-02-07 19:14:03,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:14:03" (2/2) ... [2024-02-07 19:14:03,736 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:14:03,755 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:14:03,757 INFO L76 edCorrectnessWitness]: Location invariant before [L90-L90] d1 == (_Bool)1 [2024-02-07 19:14:03,757 INFO L76 edCorrectnessWitness]: Location invariant before [L52-L52] d1 == (_Bool)0 || d1 == (_Bool)1 [2024-02-07 19:14:03,757 INFO L76 edCorrectnessWitness]: Location invariant before [L43-L43] d1 == (_Bool)0 || d1 == (_Bool)1 [2024-02-07 19:14:03,757 INFO L76 edCorrectnessWitness]: Location invariant before [L65-L65] d2 == (_Bool)0 || d2 == (_Bool)1 [2024-02-07 19:14:03,757 INFO L76 edCorrectnessWitness]: Location invariant before [L53-L53] d1 == (_Bool)0 || d1 == (_Bool)1 [2024-02-07 19:14:03,758 INFO L76 edCorrectnessWitness]: Location invariant before [L75-L75] d2 == (_Bool)0 || d2 == (_Bool)1 [2024-02-07 19:14:03,758 INFO L76 edCorrectnessWitness]: Location invariant before [L50-L50] pos <= 2147483646 [2024-02-07 19:14:03,758 INFO L76 edCorrectnessWitness]: Location invariant before [L91-L91] d2 == (_Bool)1 [2024-02-07 19:14:03,758 INFO L76 edCorrectnessWitness]: Location invariant before [L77-L77] d2 == (_Bool)0 || d2 == (_Bool)1 [2024-02-07 19:14:03,758 INFO L76 edCorrectnessWitness]: Location invariant before [L72-L72] pos <= 2147483645 [2024-02-07 19:14:03,759 INFO L76 edCorrectnessWitness]: Location invariant before [L95-L95] g2 == (_Bool)1 [2024-02-07 19:14:03,759 INFO L76 edCorrectnessWitness]: Location invariant before [L92-L92] g1 == (_Bool)1 [2024-02-07 19:14:03,759 INFO L76 edCorrectnessWitness]: Location invariant before [L68-L68] -2147483646 <= pos [2024-02-07 19:14:03,759 INFO L76 edCorrectnessWitness]: Location invariant before [L74-L74] d2 == (_Bool)0 || d2 == (_Bool)1 [2024-02-07 19:14:03,759 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] d1 == (_Bool)0 || d1 == (_Bool)1 [2024-02-07 19:14:03,759 INFO L76 edCorrectnessWitness]: Location invariant before [L46-L46] -2147483647 <= pos [2024-02-07 19:14:03,775 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:14:03,927 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/parallel-misc-3.wvr.c[2436,2449] [2024-02-07 19:14:03,930 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:14:03,936 INFO L206 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 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 19:14:04,033 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/parallel-misc-3.wvr.c[2436,2449] [2024-02-07 19:14:04,034 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:14:04,046 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:14:04,047 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04 WrapperNode [2024-02-07 19:14:04,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:14:04,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:14:04,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:14:04,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:14:04,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,058 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,069 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2024-02-07 19:14:04,070 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:14:04,070 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:14:04,070 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:14:04,070 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:14:04,078 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,079 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,089 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 19:14:04,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,090 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,096 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,097 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:14:04,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:14:04,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:14:04,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:14:04,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (1/1) ... [2024-02-07 19:14:04,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:14:04,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:04,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:14:04,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:14:04,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:14:04,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:14:04,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:14:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:14:04,162 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:14:04,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:14:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:14:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:14:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:14:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:14:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:14:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:14:04,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 19:14:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 19:14:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:14:04,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:14:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:14:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:14:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:14:04,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:14:04,166 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:14:04,240 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:14:04,241 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:14:04,407 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:14:04,407 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:14:04,510 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:14:04,510 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 19:14:04,510 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:14:04 BoogieIcfgContainer [2024-02-07 19:14:04,510 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:14:04,516 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:14:04,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:14:04,519 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:14:04,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:14:03" (1/4) ... [2024-02-07 19:14:04,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f81cd1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:14:04, skipping insertion in model container [2024-02-07 19:14:04,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:14:03" (2/4) ... [2024-02-07 19:14:04,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f81cd1b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:14:04, skipping insertion in model container [2024-02-07 19:14:04,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:14:04" (3/4) ... [2024-02-07 19:14:04,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f81cd1b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:14:04, skipping insertion in model container [2024-02-07 19:14:04,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:14:04" (4/4) ... [2024-02-07 19:14:04,522 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2024-02-07 19:14:04,534 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:14:04,534 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2024-02-07 19:14:04,534 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:14:04,581 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 19:14:04,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 63 transitions, 140 flow [2024-02-07 19:14:04,628 INFO L124 PetriNetUnfolderBase]: 8/61 cut-off events. [2024-02-07 19:14:04,628 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 19:14:04,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 61 events. 8/61 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2024-02-07 19:14:04,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 63 transitions, 140 flow [2024-02-07 19:14:04,634 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 60 transitions, 132 flow [2024-02-07 19:14:04,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:14:04,645 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;@1b19ef72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:14:04,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-02-07 19:14:04,647 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:14:04,647 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 19:14:04,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:14:04,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:04,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 19:14:04,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:04,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash 9915, now seen corresponding path program 1 times [2024-02-07 19:14:04,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:04,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463049325] [2024-02-07 19:14:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:04,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:04,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:04,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463049325] [2024-02-07 19:14:04,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463049325] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:04,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:04,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:14:04,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56297253] [2024-02-07 19:14:04,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:04,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:14:04,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:04,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:14:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:14:04,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 63 [2024-02-07 19:14:04,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:04,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:04,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 63 [2024-02-07 19:14:04,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:05,192 INFO L124 PetriNetUnfolderBase]: 873/1563 cut-off events. [2024-02-07 19:14:05,192 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-02-07 19:14:05,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2866 conditions, 1563 events. 873/1563 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8745 event pairs, 119 based on Foata normal form. 31/1114 useless extension candidates. Maximal degree in co-relation 2580. Up to 997 conditions per place. [2024-02-07 19:14:05,205 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 58 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-02-07 19:14:05,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 301 flow [2024-02-07 19:14:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:14:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:14:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-02-07 19:14:05,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6878306878306878 [2024-02-07 19:14:05,218 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 132 flow. Second operand 3 states and 130 transitions. [2024-02-07 19:14:05,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 301 flow [2024-02-07 19:14:05,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 287 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 19:14:05,228 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 138 flow [2024-02-07 19:14:05,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2024-02-07 19:14:05,232 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2024-02-07 19:14:05,233 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 138 flow [2024-02-07 19:14:05,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:05,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:05,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 19:14:05,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:14:05,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:05,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 307666, now seen corresponding path program 1 times [2024-02-07 19:14:05,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:05,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374633572] [2024-02-07 19:14:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:05,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:05,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:05,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374633572] [2024-02-07 19:14:05,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374633572] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:05,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:05,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:14:05,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510846270] [2024-02-07 19:14:05,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:05,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:14:05,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:05,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:14:05,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:14:05,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 63 [2024-02-07 19:14:05,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:05,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:05,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 63 [2024-02-07 19:14:05,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:05,475 INFO L124 PetriNetUnfolderBase]: 987/1850 cut-off events. [2024-02-07 19:14:05,476 INFO L125 PetriNetUnfolderBase]: For 87/111 co-relation queries the response was YES. [2024-02-07 19:14:05,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 1850 events. 987/1850 cut-off events. For 87/111 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11861 event pairs, 159 based on Foata normal form. 40/1451 useless extension candidates. Maximal degree in co-relation 1086. Up to 1182 conditions per place. [2024-02-07 19:14:05,489 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 58 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-02-07 19:14:05,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 303 flow [2024-02-07 19:14:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:14:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:14:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-02-07 19:14:05,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6772486772486772 [2024-02-07 19:14:05,494 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 138 flow. Second operand 3 states and 128 transitions. [2024-02-07 19:14:05,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 303 flow [2024-02-07 19:14:05,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:05,498 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 150 flow [2024-02-07 19:14:05,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2024-02-07 19:14:05,499 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2024-02-07 19:14:05,499 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 150 flow [2024-02-07 19:14:05,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:05,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:05,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-07 19:14:05,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:14:05,500 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:05,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:05,503 INFO L85 PathProgramCache]: Analyzing trace with hash 9537970, now seen corresponding path program 1 times [2024-02-07 19:14:05,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:05,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971568900] [2024-02-07 19:14:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:05,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:05,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:05,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971568900] [2024-02-07 19:14:05,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971568900] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:05,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:05,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:14:05,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677902764] [2024-02-07 19:14:05,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:05,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:14:05,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:05,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:14:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:14:05,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-02-07 19:14:05,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:05,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:05,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-02-07 19:14:05,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:05,806 INFO L124 PetriNetUnfolderBase]: 1071/2155 cut-off events. [2024-02-07 19:14:05,807 INFO L125 PetriNetUnfolderBase]: For 93/123 co-relation queries the response was YES. [2024-02-07 19:14:05,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4072 conditions, 2155 events. 1071/2155 cut-off events. For 93/123 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14846 event pairs, 295 based on Foata normal form. 61/1708 useless extension candidates. Maximal degree in co-relation 1500. Up to 771 conditions per place. [2024-02-07 19:14:05,818 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 56 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-02-07 19:14:05,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 318 flow [2024-02-07 19:14:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:14:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:14:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-02-07 19:14:05,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2024-02-07 19:14:05,821 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 150 flow. Second operand 3 states and 141 transitions. [2024-02-07 19:14:05,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 318 flow [2024-02-07 19:14:05,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:05,826 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 158 flow [2024-02-07 19:14:05,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-02-07 19:14:05,827 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2024-02-07 19:14:05,827 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 158 flow [2024-02-07 19:14:05,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:05,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:05,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:14:05,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:14:05,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:05,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash 295677368, now seen corresponding path program 1 times [2024-02-07 19:14:05,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:05,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997942107] [2024-02-07 19:14:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:05,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:05,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997942107] [2024-02-07 19:14:05,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997942107] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:05,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:05,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:14:05,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474773260] [2024-02-07 19:14:05,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:05,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:14:05,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:05,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:14:05,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:14:05,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-02-07 19:14:05,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:05,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:05,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-02-07 19:14:05,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:06,141 INFO L124 PetriNetUnfolderBase]: 1600/3208 cut-off events. [2024-02-07 19:14:06,141 INFO L125 PetriNetUnfolderBase]: For 203/263 co-relation queries the response was YES. [2024-02-07 19:14:06,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6136 conditions, 3208 events. 1600/3208 cut-off events. For 203/263 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23204 event pairs, 500 based on Foata normal form. 92/2525 useless extension candidates. Maximal degree in co-relation 3152. Up to 1244 conditions per place. [2024-02-07 19:14:06,159 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 58 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-02-07 19:14:06,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 338 flow [2024-02-07 19:14:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:14:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:14:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-02-07 19:14:06,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2024-02-07 19:14:06,160 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 158 flow. Second operand 3 states and 141 transitions. [2024-02-07 19:14:06,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 338 flow [2024-02-07 19:14:06,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:06,164 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 166 flow [2024-02-07 19:14:06,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-02-07 19:14:06,165 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2024-02-07 19:14:06,166 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 166 flow [2024-02-07 19:14:06,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:06,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:06,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:06,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:14:06,166 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:06,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1580579633, now seen corresponding path program 1 times [2024-02-07 19:14:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441884392] [2024-02-07 19:14:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:06,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:06,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:06,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441884392] [2024-02-07 19:14:06,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441884392] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:06,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:06,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:14:06,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613258667] [2024-02-07 19:14:06,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:06,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:14:06,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:06,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:14:06,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:14:06,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 19:14:06,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:06,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:06,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 19:14:06,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:06,409 INFO L124 PetriNetUnfolderBase]: 1598/3169 cut-off events. [2024-02-07 19:14:06,409 INFO L125 PetriNetUnfolderBase]: For 216/281 co-relation queries the response was YES. [2024-02-07 19:14:06,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6169 conditions, 3169 events. 1598/3169 cut-off events. For 216/281 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22951 event pairs, 552 based on Foata normal form. 0/2384 useless extension candidates. Maximal degree in co-relation 3413. Up to 2216 conditions per place. [2024-02-07 19:14:06,422 INFO L140 encePairwiseOnDemand]: 58/63 looper letters, 39 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2024-02-07 19:14:06,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 261 flow [2024-02-07 19:14:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:14:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:14:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-02-07 19:14:06,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-02-07 19:14:06,424 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 166 flow. Second operand 3 states and 127 transitions. [2024-02-07 19:14:06,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 261 flow [2024-02-07 19:14:06,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:06,427 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 185 flow [2024-02-07 19:14:06,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-02-07 19:14:06,430 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2024-02-07 19:14:06,430 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 185 flow [2024-02-07 19:14:06,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:06,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:06,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:06,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:14:06,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:06,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1481384205, now seen corresponding path program 1 times [2024-02-07 19:14:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:06,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917891669] [2024-02-07 19:14:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:06,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:06,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:06,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917891669] [2024-02-07 19:14:06,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917891669] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:06,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:06,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:14:06,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41166999] [2024-02-07 19:14:06,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:06,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:14:06,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:14:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:14:06,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 63 [2024-02-07 19:14:06,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:06,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:06,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 63 [2024-02-07 19:14:06,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:06,910 INFO L124 PetriNetUnfolderBase]: 2892/5162 cut-off events. [2024-02-07 19:14:06,910 INFO L125 PetriNetUnfolderBase]: For 1064/1266 co-relation queries the response was YES. [2024-02-07 19:14:06,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11572 conditions, 5162 events. 2892/5162 cut-off events. For 1064/1266 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 34506 event pairs, 1376 based on Foata normal form. 299/4262 useless extension candidates. Maximal degree in co-relation 6613. Up to 3021 conditions per place. [2024-02-07 19:14:06,942 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 63 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2024-02-07 19:14:06,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 382 flow [2024-02-07 19:14:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:14:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:14:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-02-07 19:14:06,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-02-07 19:14:06,944 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 185 flow. Second operand 4 states and 154 transitions. [2024-02-07 19:14:06,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 382 flow [2024-02-07 19:14:06,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:06,947 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 215 flow [2024-02-07 19:14:06,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-02-07 19:14:06,950 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2024-02-07 19:14:06,950 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 215 flow [2024-02-07 19:14:06,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:06,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:06,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:06,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:14:06,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:06,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:06,951 INFO L85 PathProgramCache]: Analyzing trace with hash -501383904, now seen corresponding path program 1 times [2024-02-07 19:14:06,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:06,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311795122] [2024-02-07 19:14:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:06,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:07,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:07,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311795122] [2024-02-07 19:14:07,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311795122] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:07,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:14:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107585750] [2024-02-07 19:14:07,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:07,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:14:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:07,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:14:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:14:07,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 63 [2024-02-07 19:14:07,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:07,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:07,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 63 [2024-02-07 19:14:07,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:07,558 INFO L124 PetriNetUnfolderBase]: 3063/6082 cut-off events. [2024-02-07 19:14:07,559 INFO L125 PetriNetUnfolderBase]: For 3444/3764 co-relation queries the response was YES. [2024-02-07 19:14:07,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14634 conditions, 6082 events. 3063/6082 cut-off events. For 3444/3764 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 45097 event pairs, 1850 based on Foata normal form. 393/5441 useless extension candidates. Maximal degree in co-relation 7888. Up to 3560 conditions per place. [2024-02-07 19:14:07,586 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 62 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2024-02-07 19:14:07,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 425 flow [2024-02-07 19:14:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:14:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:14:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-02-07 19:14:07,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-02-07 19:14:07,588 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 215 flow. Second operand 4 states and 152 transitions. [2024-02-07 19:14:07,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 425 flow [2024-02-07 19:14:07,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 418 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:07,594 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 247 flow [2024-02-07 19:14:07,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-02-07 19:14:07,595 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2024-02-07 19:14:07,595 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 247 flow [2024-02-07 19:14:07,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:07,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:07,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:07,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:14:07,596 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:07,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:07,597 INFO L85 PathProgramCache]: Analyzing trace with hash -753966954, now seen corresponding path program 1 times [2024-02-07 19:14:07,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:07,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176702264] [2024-02-07 19:14:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:07,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:07,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:07,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176702264] [2024-02-07 19:14:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176702264] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:07,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:07,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:14:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117083492] [2024-02-07 19:14:07,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:07,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:14:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:14:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:14:07,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 19:14:07,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:07,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:07,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 19:14:07,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:08,055 INFO L124 PetriNetUnfolderBase]: 2541/6154 cut-off events. [2024-02-07 19:14:08,056 INFO L125 PetriNetUnfolderBase]: For 4556/4992 co-relation queries the response was YES. [2024-02-07 19:14:08,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15129 conditions, 6154 events. 2541/6154 cut-off events. For 4556/4992 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 51364 event pairs, 838 based on Foata normal form. 0/5304 useless extension candidates. Maximal degree in co-relation 7684. Up to 2382 conditions per place. [2024-02-07 19:14:08,082 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 65 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-02-07 19:14:08,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 510 flow [2024-02-07 19:14:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:14:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:14:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-02-07 19:14:08,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2024-02-07 19:14:08,084 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 247 flow. Second operand 3 states and 147 transitions. [2024-02-07 19:14:08,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 510 flow [2024-02-07 19:14:08,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 503 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:08,088 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 302 flow [2024-02-07 19:14:08,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-02-07 19:14:08,090 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2024-02-07 19:14:08,090 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 302 flow [2024-02-07 19:14:08,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:08,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:08,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:08,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:14:08,091 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:08,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1227140617, now seen corresponding path program 1 times [2024-02-07 19:14:08,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:08,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079606313] [2024-02-07 19:14:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:08,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:08,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:08,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079606313] [2024-02-07 19:14:08,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079606313] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:08,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043825454] [2024-02-07 19:14:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:08,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:08,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:08,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:08,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:14:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:08,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-07 19:14:08,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:08,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:08,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043825454] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:08,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:08,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-02-07 19:14:08,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585609102] [2024-02-07 19:14:08,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:08,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:14:08,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:08,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:14:08,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:14:08,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 19:14:08,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 32.57142857142857) internal successors, (228), 7 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:08,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:08,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 19:14:08,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:08,846 INFO L124 PetriNetUnfolderBase]: 2589/6895 cut-off events. [2024-02-07 19:14:08,846 INFO L125 PetriNetUnfolderBase]: For 8099/8585 co-relation queries the response was YES. [2024-02-07 19:14:08,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18242 conditions, 6895 events. 2589/6895 cut-off events. For 8099/8585 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 61470 event pairs, 368 based on Foata normal form. 274/6853 useless extension candidates. Maximal degree in co-relation 9593. Up to 2180 conditions per place. [2024-02-07 19:14:08,872 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 106 selfloop transitions, 17 changer transitions 0/146 dead transitions. [2024-02-07 19:14:08,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 146 transitions, 884 flow [2024-02-07 19:14:08,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:14:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:14:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 310 transitions. [2024-02-07 19:14:08,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7029478458049887 [2024-02-07 19:14:08,874 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 302 flow. Second operand 7 states and 310 transitions. [2024-02-07 19:14:08,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 146 transitions, 884 flow [2024-02-07 19:14:08,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 146 transitions, 844 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-02-07 19:14:08,880 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 395 flow [2024-02-07 19:14:08,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2024-02-07 19:14:08,880 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 21 predicate places. [2024-02-07 19:14:08,880 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 395 flow [2024-02-07 19:14:08,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.57142857142857) internal successors, (228), 7 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:08,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:08,881 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:08,893 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 19:14:09,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:09,091 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:09,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:09,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1833884729, now seen corresponding path program 1 times [2024-02-07 19:14:09,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:09,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332731562] [2024-02-07 19:14:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:09,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:14:09,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332731562] [2024-02-07 19:14:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332731562] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:09,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:09,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:14:09,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137813658] [2024-02-07 19:14:09,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:09,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:14:09,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:09,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:14:09,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:14:09,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 63 [2024-02-07 19:14:09,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:09,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:09,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 63 [2024-02-07 19:14:09,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:09,667 INFO L124 PetriNetUnfolderBase]: 2589/6543 cut-off events. [2024-02-07 19:14:09,668 INFO L125 PetriNetUnfolderBase]: For 9621/10040 co-relation queries the response was YES. [2024-02-07 19:14:09,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18050 conditions, 6543 events. 2589/6543 cut-off events. For 9621/10040 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 55796 event pairs, 1843 based on Foata normal form. 584/6681 useless extension candidates. Maximal degree in co-relation 9424. Up to 4418 conditions per place. [2024-02-07 19:14:09,700 INFO L140 encePairwiseOnDemand]: 58/63 looper letters, 55 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2024-02-07 19:14:09,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 489 flow [2024-02-07 19:14:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:14:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:14:09,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-02-07 19:14:09,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-02-07 19:14:09,702 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 395 flow. Second operand 3 states and 112 transitions. [2024-02-07 19:14:09,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 489 flow [2024-02-07 19:14:09,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 75 transitions, 476 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:09,716 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 366 flow [2024-02-07 19:14:09,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=366, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-02-07 19:14:09,716 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 18 predicate places. [2024-02-07 19:14:09,717 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 366 flow [2024-02-07 19:14:09,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:09,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:09,717 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:09,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 19:14:09,718 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:09,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash 318164385, now seen corresponding path program 1 times [2024-02-07 19:14:09,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035590161] [2024-02-07 19:14:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:09,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:09,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:09,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035590161] [2024-02-07 19:14:09,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035590161] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:09,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:09,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:14:09,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025581609] [2024-02-07 19:14:09,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:09,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:14:09,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:09,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:14:09,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:14:09,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 63 [2024-02-07 19:14:09,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:09,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:09,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 63 [2024-02-07 19:14:09,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:10,352 INFO L124 PetriNetUnfolderBase]: 3523/7721 cut-off events. [2024-02-07 19:14:10,352 INFO L125 PetriNetUnfolderBase]: For 10280/10532 co-relation queries the response was YES. [2024-02-07 19:14:10,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21741 conditions, 7721 events. 3523/7721 cut-off events. For 10280/10532 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 60948 event pairs, 1591 based on Foata normal form. 642/7837 useless extension candidates. Maximal degree in co-relation 21716. Up to 3829 conditions per place. [2024-02-07 19:14:10,390 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 79 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-02-07 19:14:10,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 638 flow [2024-02-07 19:14:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:14:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:14:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-02-07 19:14:10,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-02-07 19:14:10,391 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 366 flow. Second operand 4 states and 141 transitions. [2024-02-07 19:14:10,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 638 flow [2024-02-07 19:14:10,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 637 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:10,402 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 355 flow [2024-02-07 19:14:10,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=355, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-02-07 19:14:10,403 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2024-02-07 19:14:10,403 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 355 flow [2024-02-07 19:14:10,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:10,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:10,403 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] [2024-02-07 19:14:10,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 19:14:10,404 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:10,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:10,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1852715364, now seen corresponding path program 1 times [2024-02-07 19:14:10,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:10,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980057891] [2024-02-07 19:14:10,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:10,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:10,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:10,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980057891] [2024-02-07 19:14:10,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980057891] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:10,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276400005] [2024-02-07 19:14:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:10,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:10,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:10,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:10,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:14:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:10,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:14:10,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:10,536 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:14:10,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276400005] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:10,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:14:10,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2024-02-07 19:14:10,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562077121] [2024-02-07 19:14:10,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:10,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:14:10,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:10,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:14:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:14:10,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 19:14:10,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:10,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:10,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 19:14:10,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:10,959 INFO L124 PetriNetUnfolderBase]: 2591/6351 cut-off events. [2024-02-07 19:14:10,959 INFO L125 PetriNetUnfolderBase]: For 8454/8454 co-relation queries the response was YES. [2024-02-07 19:14:10,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17761 conditions, 6351 events. 2591/6351 cut-off events. For 8454/8454 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 52036 event pairs, 481 based on Foata normal form. 44/5993 useless extension candidates. Maximal degree in co-relation 17735. Up to 3505 conditions per place. [2024-02-07 19:14:10,993 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 80 selfloop transitions, 16 changer transitions 0/111 dead transitions. [2024-02-07 19:14:10,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 749 flow [2024-02-07 19:14:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:14:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:14:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2024-02-07 19:14:10,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2024-02-07 19:14:10,995 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 355 flow. Second operand 4 states and 183 transitions. [2024-02-07 19:14:10,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 749 flow [2024-02-07 19:14:11,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 738 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 19:14:11,009 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 527 flow [2024-02-07 19:14:11,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=527, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-02-07 19:14:11,010 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 19 predicate places. [2024-02-07 19:14:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 527 flow [2024-02-07 19:14:11,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:11,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:11,011 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] [2024-02-07 19:14:11,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-07 19:14:11,223 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,SelfDestructingSolverStorable11 [2024-02-07 19:14:11,223 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:11,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:11,225 INFO L85 PathProgramCache]: Analyzing trace with hash -235176581, now seen corresponding path program 1 times [2024-02-07 19:14:11,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:11,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386311259] [2024-02-07 19:14:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:11,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:11,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386311259] [2024-02-07 19:14:11,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386311259] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:11,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016867506] [2024-02-07 19:14:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:11,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:11,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:11,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:11,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 19:14:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:11,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:14:11,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:11,365 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:14:11,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016867506] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:11,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:14:11,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2024-02-07 19:14:11,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950077831] [2024-02-07 19:14:11,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:11,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:14:11,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:11,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:14:11,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:14:11,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 19:14:11,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 527 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:11,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:11,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 19:14:11,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:11,884 INFO L124 PetriNetUnfolderBase]: 2953/7334 cut-off events. [2024-02-07 19:14:11,885 INFO L125 PetriNetUnfolderBase]: For 14706/14706 co-relation queries the response was YES. [2024-02-07 19:14:11,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21250 conditions, 7334 events. 2953/7334 cut-off events. For 14706/14706 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 60882 event pairs, 1137 based on Foata normal form. 42/6914 useless extension candidates. Maximal degree in co-relation 21221. Up to 3718 conditions per place. [2024-02-07 19:14:11,921 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 107 selfloop transitions, 23 changer transitions 0/145 dead transitions. [2024-02-07 19:14:11,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 145 transitions, 1162 flow [2024-02-07 19:14:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:14:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:14:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2024-02-07 19:14:11,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.753968253968254 [2024-02-07 19:14:11,923 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 527 flow. Second operand 4 states and 190 transitions. [2024-02-07 19:14:11,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 145 transitions, 1162 flow [2024-02-07 19:14:11,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 145 transitions, 1162 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 19:14:11,940 INFO L231 Difference]: Finished difference. Result has 84 places, 102 transitions, 836 flow [2024-02-07 19:14:11,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=836, PETRI_PLACES=84, PETRI_TRANSITIONS=102} [2024-02-07 19:14:11,941 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 25 predicate places. [2024-02-07 19:14:11,941 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 102 transitions, 836 flow [2024-02-07 19:14:11,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:11,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:11,941 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:11,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 19:14:12,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:12,156 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:12,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1827420436, now seen corresponding path program 1 times [2024-02-07 19:14:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:12,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694105942] [2024-02-07 19:14:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:12,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-07 19:14:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694105942] [2024-02-07 19:14:12,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694105942] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186824561] [2024-02-07 19:14:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:12,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:12,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:12,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:12,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 19:14:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:12,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 19:14:12,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-07 19:14:12,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-07 19:14:12,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186824561] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:12,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:12,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2024-02-07 19:14:12,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524949894] [2024-02-07 19:14:12,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:12,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:14:12,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:14:12,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:14:12,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 19:14:12,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 102 transitions, 836 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:12,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:12,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 19:14:12,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:13,540 INFO L124 PetriNetUnfolderBase]: 5434/13853 cut-off events. [2024-02-07 19:14:13,540 INFO L125 PetriNetUnfolderBase]: For 38283/38495 co-relation queries the response was YES. [2024-02-07 19:14:13,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40981 conditions, 13853 events. 5434/13853 cut-off events. For 38283/38495 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 128949 event pairs, 518 based on Foata normal form. 256/13275 useless extension candidates. Maximal degree in co-relation 40947. Up to 3045 conditions per place. [2024-02-07 19:14:13,629 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 166 selfloop transitions, 75 changer transitions 0/256 dead transitions. [2024-02-07 19:14:13,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 256 transitions, 2280 flow [2024-02-07 19:14:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:14:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:14:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 340 transitions. [2024-02-07 19:14:13,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7709750566893424 [2024-02-07 19:14:13,631 INFO L175 Difference]: Start difference. First operand has 84 places, 102 transitions, 836 flow. Second operand 7 states and 340 transitions. [2024-02-07 19:14:13,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 256 transitions, 2280 flow [2024-02-07 19:14:13,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 256 transitions, 2264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:14:13,667 INFO L231 Difference]: Finished difference. Result has 93 places, 153 transitions, 1664 flow [2024-02-07 19:14:13,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1664, PETRI_PLACES=93, PETRI_TRANSITIONS=153} [2024-02-07 19:14:13,667 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2024-02-07 19:14:13,668 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 153 transitions, 1664 flow [2024-02-07 19:14:13,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:13,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:13,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:13,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 19:14:13,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:13,880 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:13,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash -565439753, now seen corresponding path program 1 times [2024-02-07 19:14:13,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:13,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181154837] [2024-02-07 19:14:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:13,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:14:13,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:13,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181154837] [2024-02-07 19:14:13,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181154837] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:13,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982786431] [2024-02-07 19:14:13,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:13,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:13,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:13,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:13,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 19:14:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:14,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 19:14:14,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:14:14,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:14,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 19:14:14,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982786431] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:14,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:14,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-02-07 19:14:14,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771213304] [2024-02-07 19:14:14,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:14,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 19:14:14,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:14,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 19:14:14,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2024-02-07 19:14:14,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 19:14:14,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 153 transitions, 1664 flow. Second operand has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:14,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:14,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 19:14:14,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:16,285 INFO L124 PetriNetUnfolderBase]: 9542/23427 cut-off events. [2024-02-07 19:14:16,286 INFO L125 PetriNetUnfolderBase]: For 89742/89878 co-relation queries the response was YES. [2024-02-07 19:14:16,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72218 conditions, 23427 events. 9542/23427 cut-off events. For 89742/89878 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 227637 event pairs, 1426 based on Foata normal form. 775/22817 useless extension candidates. Maximal degree in co-relation 72179. Up to 2976 conditions per place. [2024-02-07 19:14:16,401 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 175 selfloop transitions, 111 changer transitions 0/301 dead transitions. [2024-02-07 19:14:16,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 301 transitions, 3036 flow [2024-02-07 19:14:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:14:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:14:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 429 transitions. [2024-02-07 19:14:16,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7566137566137566 [2024-02-07 19:14:16,403 INFO L175 Difference]: Start difference. First operand has 93 places, 153 transitions, 1664 flow. Second operand 9 states and 429 transitions. [2024-02-07 19:14:16,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 301 transitions, 3036 flow [2024-02-07 19:14:16,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 301 transitions, 3018 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-02-07 19:14:16,466 INFO L231 Difference]: Finished difference. Result has 102 places, 176 transitions, 2308 flow [2024-02-07 19:14:16,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2308, PETRI_PLACES=102, PETRI_TRANSITIONS=176} [2024-02-07 19:14:16,466 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 43 predicate places. [2024-02-07 19:14:16,466 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 176 transitions, 2308 flow [2024-02-07 19:14:16,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:16,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:16,467 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:16,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 19:14:16,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-07 19:14:16,680 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:16,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash -933435540, now seen corresponding path program 1 times [2024-02-07 19:14:16,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:16,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336848996] [2024-02-07 19:14:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:16,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:14:16,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336848996] [2024-02-07 19:14:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336848996] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849317622] [2024-02-07 19:14:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:16,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:16,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:16,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:16,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 19:14:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:16,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 19:14:16,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:14:16,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:14:16,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849317622] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:16,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:16,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-02-07 19:14:16,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041718855] [2024-02-07 19:14:16,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:16,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:14:16,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:16,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:14:16,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:14:16,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 19:14:16,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 176 transitions, 2308 flow. Second operand has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 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 19:14:16,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:16,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 19:14:16,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:19,121 INFO L124 PetriNetUnfolderBase]: 8832/21633 cut-off events. [2024-02-07 19:14:19,121 INFO L125 PetriNetUnfolderBase]: For 113407/114443 co-relation queries the response was YES. [2024-02-07 19:14:19,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68609 conditions, 21633 events. 8832/21633 cut-off events. For 113407/114443 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 214292 event pairs, 3212 based on Foata normal form. 662/20859 useless extension candidates. Maximal degree in co-relation 68567. Up to 6167 conditions per place. [2024-02-07 19:14:19,221 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 68 selfloop transitions, 117 changer transitions 1/201 dead transitions. [2024-02-07 19:14:19,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 201 transitions, 2614 flow [2024-02-07 19:14:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 19:14:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 19:14:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 249 transitions. [2024-02-07 19:14:19,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-02-07 19:14:19,222 INFO L175 Difference]: Start difference. First operand has 102 places, 176 transitions, 2308 flow. Second operand 6 states and 249 transitions. [2024-02-07 19:14:19,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 201 transitions, 2614 flow [2024-02-07 19:14:19,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 201 transitions, 2305 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-02-07 19:14:19,341 INFO L231 Difference]: Finished difference. Result has 96 places, 163 transitions, 2086 flow [2024-02-07 19:14:19,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2086, PETRI_PLACES=96, PETRI_TRANSITIONS=163} [2024-02-07 19:14:19,341 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 37 predicate places. [2024-02-07 19:14:19,341 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 163 transitions, 2086 flow [2024-02-07 19:14:19,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 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 19:14:19,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:19,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:19,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 19:14:19,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-07 19:14:19,553 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:19,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:19,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2108577219, now seen corresponding path program 2 times [2024-02-07 19:14:19,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:19,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291186350] [2024-02-07 19:14:19,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:19,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-02-07 19:14:19,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:19,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291186350] [2024-02-07 19:14:19,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291186350] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:19,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:19,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:14:19,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145695180] [2024-02-07 19:14:19,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:19,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:14:19,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:19,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:14:19,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:14:19,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-02-07 19:14:19,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 163 transitions, 2086 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:19,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:19,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-02-07 19:14:19,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:21,890 INFO L124 PetriNetUnfolderBase]: 10503/23324 cut-off events. [2024-02-07 19:14:21,890 INFO L125 PetriNetUnfolderBase]: For 98026/98354 co-relation queries the response was YES. [2024-02-07 19:14:21,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74713 conditions, 23324 events. 10503/23324 cut-off events. For 98026/98354 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 220552 event pairs, 6991 based on Foata normal form. 592/22428 useless extension candidates. Maximal degree in co-relation 74676. Up to 14420 conditions per place. [2024-02-07 19:14:21,978 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 182 selfloop transitions, 4 changer transitions 0/200 dead transitions. [2024-02-07 19:14:21,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 200 transitions, 2919 flow [2024-02-07 19:14:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:14:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:14:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-02-07 19:14:21,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-02-07 19:14:21,979 INFO L175 Difference]: Start difference. First operand has 96 places, 163 transitions, 2086 flow. Second operand 3 states and 127 transitions. [2024-02-07 19:14:21,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 200 transitions, 2919 flow [2024-02-07 19:14:22,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 200 transitions, 2900 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 19:14:22,023 INFO L231 Difference]: Finished difference. Result has 98 places, 163 transitions, 2084 flow [2024-02-07 19:14:22,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2084, PETRI_PLACES=98, PETRI_TRANSITIONS=163} [2024-02-07 19:14:22,023 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2024-02-07 19:14:22,023 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 163 transitions, 2084 flow [2024-02-07 19:14:22,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:22,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:22,024 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:22,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-07 19:14:22,024 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 19:14:22,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:22,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1692725202, now seen corresponding path program 3 times [2024-02-07 19:14:22,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:22,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813649915] [2024-02-07 19:14:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:22,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-02-07 19:14:22,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:22,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813649915] [2024-02-07 19:14:22,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813649915] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:14:22,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:14:22,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:14:22,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411705183] [2024-02-07 19:14:22,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:14:22,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:14:22,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:14:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:14:22,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-02-07 19:14:22,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 163 transitions, 2084 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:22,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:22,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-02-07 19:14:22,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:24,205 INFO L124 PetriNetUnfolderBase]: 10364/23419 cut-off events. [2024-02-07 19:14:24,205 INFO L125 PetriNetUnfolderBase]: For 99891/100035 co-relation queries the response was YES. [2024-02-07 19:14:24,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77161 conditions, 23419 events. 10364/23419 cut-off events. For 99891/100035 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 223933 event pairs, 7328 based on Foata normal form. 582/22548 useless extension candidates. Maximal degree in co-relation 77124. Up to 14904 conditions per place. [2024-02-07 19:14:24,282 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 0 selfloop transitions, 0 changer transitions 193/193 dead transitions. [2024-02-07 19:14:24,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 193 transitions, 2789 flow [2024-02-07 19:14:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:14:24,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:14:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-02-07 19:14:24,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-02-07 19:14:24,283 INFO L175 Difference]: Start difference. First operand has 98 places, 163 transitions, 2084 flow. Second operand 3 states and 126 transitions. [2024-02-07 19:14:24,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 193 transitions, 2789 flow [2024-02-07 19:14:24,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 193 transitions, 2643 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-02-07 19:14:24,350 INFO L231 Difference]: Finished difference. Result has 94 places, 0 transitions, 0 flow [2024-02-07 19:14:24,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=94, PETRI_TRANSITIONS=0} [2024-02-07 19:14:24,351 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 35 predicate places. [2024-02-07 19:14:24,351 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 0 transitions, 0 flow [2024-02-07 19:14:24,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:24,353 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 31 remaining) [2024-02-07 19:14:24,353 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 31 remaining) [2024-02-07 19:14:24,354 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (14 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 31 remaining) [2024-02-07 19:14:24,355 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 31 remaining) [2024-02-07 19:14:24,356 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 31 remaining) [2024-02-07 19:14:24,356 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 31 remaining) [2024-02-07 19:14:24,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-07 19:14:24,356 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:24,360 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 19:14:24,360 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 19:14:24,362 INFO L503 ceAbstractionStarter]: Automizer considered 16 witness invariants [2024-02-07 19:14:24,363 INFO L504 ceAbstractionStarter]: WitnessConsidered=16 [2024-02-07 19:14:24,363 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 07:14:24 BasicIcfg [2024-02-07 19:14:24,363 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 19:14:24,364 INFO L158 Benchmark]: Toolchain (without parser) took 20636.90ms. Allocated memory was 178.3MB in the beginning and 6.4GB in the end (delta: 6.2GB). Free memory was 106.1MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-02-07 19:14:24,364 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 178.3MB. Free memory is still 138.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:14:24,364 INFO L158 Benchmark]: Witness Parser took 0.12ms. Allocated memory is still 178.3MB. Free memory is still 108.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:14:24,364 INFO L158 Benchmark]: CACSL2BoogieTranslator took 318.28ms. Allocated memory is still 178.3MB. Free memory was 105.9MB in the beginning and 146.2MB in the end (delta: -40.4MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2024-02-07 19:14:24,364 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.09ms. Allocated memory is still 178.3MB. Free memory was 146.2MB in the beginning and 145.3MB in the end (delta: 912.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:14:24,365 INFO L158 Benchmark]: Boogie Preprocessor took 29.16ms. Allocated memory is still 178.3MB. Free memory was 145.3MB in the beginning and 143.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 19:14:24,365 INFO L158 Benchmark]: RCFGBuilder took 410.87ms. Allocated memory is still 178.3MB. Free memory was 143.2MB in the beginning and 118.1MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-02-07 19:14:24,365 INFO L158 Benchmark]: TraceAbstraction took 19846.94ms. Allocated memory was 178.3MB in the beginning and 6.4GB in the end (delta: 6.2GB). Free memory was 116.9MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-02-07 19:14:24,366 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 178.3MB. Free memory is still 138.1MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.12ms. Allocated memory is still 178.3MB. Free memory is still 108.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 318.28ms. Allocated memory is still 178.3MB. Free memory was 105.9MB in the beginning and 146.2MB in the end (delta: -40.4MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.09ms. Allocated memory is still 178.3MB. Free memory was 146.2MB in the beginning and 145.3MB in the end (delta: 912.1kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.16ms. Allocated memory is still 178.3MB. Free memory was 145.3MB in the beginning and 143.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 410.87ms. Allocated memory is still 178.3MB. Free memory was 143.2MB in the beginning and 118.1MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 19846.94ms. Allocated memory was 178.3MB in the beginning and 6.4GB in the end (delta: 6.2GB). Free memory was 116.9MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 46]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 52]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 53]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 55]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 65]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 68]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 72]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 74]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 75]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 77]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 90]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 91]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 92]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 95]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 101]: 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, 94 locations, 31 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: 19.8s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 16.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 816 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 734 mSDsluCounter, 26 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 165 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2006 IncrementalHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 165 mSolverCounterUnsat, 26 mSDtfsCounter, 2006 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 378 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2308occurred in iteration=15, InterpolantAutomatonStates: 76, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 613 NumberOfCodeBlocks, 613 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 728 ConstructedInterpolants, 0 QuantifiedInterpolants, 2084 SizeOfPredicates, 0 NumberOfNonLiveVariables, 853 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 28 InterpolantComputations, 14 PerfectInterpolantSequences, 153/274 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 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-07 19:14:24,396 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