./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-difference-det.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/popl20-difference-det.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/popl20-difference-det.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-difference-det.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 19:16:16,451 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:16:16,514 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:16:16,517 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:16:16,517 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:16:16,544 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:16:16,544 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:16:16,544 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:16:16,545 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:16:16,545 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:16:16,545 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:16:16,546 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:16:16,546 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:16:16,546 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:16:16,546 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:16:16,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:16:16,547 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:16:16,547 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:16:16,547 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:16:16,551 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:16:16,554 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:16:16,554 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:16:16,554 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:16:16,555 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:16:16,555 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:16:16,555 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:16:16,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:16:16,556 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:16:16,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:16:16,556 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:16:16,557 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:16:16,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:16:16,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:16:16,558 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:16:16,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:16:16,558 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:16:16,558 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:16:16,559 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:16:16,559 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:16:16,559 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:16:16,559 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:16:16,559 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:16:16,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:16:16,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:16:16,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:16:16,789 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:16:16,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:16:16,792 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:16:16,792 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:16:16,793 INFO L431 ainManager$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/popl20-difference-det.wvr.yml/witness.yml [2024-02-07 19:16:16,855 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:16:16,855 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:16:16,856 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2024-02-07 19:16:17,911 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:16:18,066 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:16:18,066 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2024-02-07 19:16:18,071 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/001bb7536/f59bfbe31e9b4458b239a860fbf38242/FLAG54a0dadb2 [2024-02-07 19:16:18,081 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/001bb7536/f59bfbe31e9b4458b239a860fbf38242 [2024-02-07 19:16:18,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:16:18,084 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:16:18,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:16:18,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:16:18,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:16:18,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:16:16" (1/2) ... [2024-02-07 19:16:18,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd08a8f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:16:18, skipping insertion in model container [2024-02-07 19:16:18,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:16:16" (1/2) ... [2024-02-07 19:16:18,093 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b26874a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:16:18, skipping insertion in model container [2024-02-07 19:16:18,094 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:16:18" (2/2) ... [2024-02-07 19:16:18,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd08a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18, skipping insertion in model container [2024-02-07 19:16:18,094 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:16:18" (2/2) ... [2024-02-07 19:16:18,095 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:16:18,107 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:16:18,110 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] -2147483647 <= counter1 [2024-02-07 19:16:18,110 INFO L76 edCorrectnessWitness]: Location invariant before [L76-L76] counter2 <= 2147483646 [2024-02-07 19:16:18,110 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] counter1 <= 2147483646 [2024-02-07 19:16:18,111 INFO L76 edCorrectnessWitness]: Location invariant before [L65-L65] -2147483647 <= counter2 [2024-02-07 19:16:18,128 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:16:18,285 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2559,2572] [2024-02-07 19:16:18,298 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:16:18,312 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:16:18,345 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c[2559,2572] [2024-02-07 19:16:18,346 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:16:18,357 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:16:18,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18 WrapperNode [2024-02-07 19:16:18,358 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:16:18,359 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:16:18,359 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:16:18,359 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:16:18,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,398 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 127 [2024-02-07 19:16:18,398 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:16:18,399 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:16:18,400 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:16:18,400 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:16:18,408 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,422 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,438 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-02-07 19:16:18,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,452 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,456 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,459 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,460 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,466 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:16:18,468 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:16:18,468 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:16:18,468 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:16:18,469 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (1/1) ... [2024-02-07 19:16:18,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:16:18,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:16:18,503 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 19:16:18,509 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 19:16:18,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:16:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:16:18,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:16:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:16:18,533 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:16:18,533 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 19:16:18,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 19:16:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-02-07 19:16:18,534 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-02-07 19:16:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:16:18,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:16:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:16:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:16:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 19:16:18,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:16:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:16:18,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:16:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:16:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:16:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 19:16:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 19:16:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 19:16:18,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:16:18,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:16:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:16:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:16:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:16:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:16:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 19:16:18,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:16:18,540 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 19:16:18,633 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:16:18,635 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:16:18,789 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:16:18,789 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:16:18,962 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:16:18,962 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-02-07 19:16:18,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:16:18 BoogieIcfgContainer [2024-02-07 19:16:18,963 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:16:18,964 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:16:18,964 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:16:18,967 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:16:18,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:16:16" (1/4) ... [2024-02-07 19:16:18,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa8f455 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:16:18, skipping insertion in model container [2024-02-07 19:16:18,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:16:18" (2/4) ... [2024-02-07 19:16:18,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa8f455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:16:18, skipping insertion in model container [2024-02-07 19:16:18,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:16:18" (3/4) ... [2024-02-07 19:16:18,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa8f455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:16:18, skipping insertion in model container [2024-02-07 19:16:18,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:16:18" (4/4) ... [2024-02-07 19:16:18,969 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2024-02-07 19:16:18,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:16:18,984 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-02-07 19:16:18,984 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:16:19,025 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-02-07 19:16:19,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 19:16:19,075 INFO L124 PetriNetUnfolderBase]: 4/43 cut-off events. [2024-02-07 19:16:19,075 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 19:16:19,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 4/43 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2024-02-07 19:16:19,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 122 flow [2024-02-07 19:16:19,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 42 transitions, 108 flow [2024-02-07 19:16:19,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:16:19,094 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;@392a1de6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:16:19,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-02-07 19:16:19,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:16:19,098 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-02-07 19:16:19,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:16:19,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:16:19,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:16:19,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:16:19,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:16:19,106 INFO L85 PathProgramCache]: Analyzing trace with hash 385543227, now seen corresponding path program 1 times [2024-02-07 19:16:19,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:16:19,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883548917] [2024-02-07 19:16:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:19,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:16:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:19,314 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 19:16:19,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:16:19,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883548917] [2024-02-07 19:16:19,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883548917] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:16:19,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:16:19,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:16:19,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633141894] [2024-02-07 19:16:19,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:16:19,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:16:19,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:16:19,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:16:19,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:16:19,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:16:19,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:19,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:16:19,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:16:19,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:16:20,088 INFO L124 PetriNetUnfolderBase]: 7260/9845 cut-off events. [2024-02-07 19:16:20,088 INFO L125 PetriNetUnfolderBase]: For 529/529 co-relation queries the response was YES. [2024-02-07 19:16:20,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20074 conditions, 9845 events. 7260/9845 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 50976 event pairs, 2216 based on Foata normal form. 233/8571 useless extension candidates. Maximal degree in co-relation 16010. Up to 6797 conditions per place. [2024-02-07 19:16:20,147 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 64 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-02-07 19:16:20,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 319 flow [2024-02-07 19:16:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:16:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:16:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-02-07 19:16:20,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2024-02-07 19:16:20,159 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 108 flow. Second operand 3 states and 96 transitions. [2024-02-07 19:16:20,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 319 flow [2024-02-07 19:16:20,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 71 transitions, 289 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-02-07 19:16:20,182 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 108 flow [2024-02-07 19:16:20,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-02-07 19:16:20,186 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-02-07 19:16:20,186 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 108 flow [2024-02-07 19:16:20,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:20,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:16:20,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-07 19:16:20,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:16:20,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:16:20,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:16:20,189 INFO L85 PathProgramCache]: Analyzing trace with hash 976136037, now seen corresponding path program 1 times [2024-02-07 19:16:20,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:16:20,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53857222] [2024-02-07 19:16:20,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:20,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:16:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:20,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:16:20,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53857222] [2024-02-07 19:16:20,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53857222] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:16:20,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:16:20,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:16:20,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523767075] [2024-02-07 19:16:20,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:16:20,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:16:20,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:16:20,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:16:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:16:20,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:16:20,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:20,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:16:20,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:16:20,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:16:20,763 INFO L124 PetriNetUnfolderBase]: 6213/8399 cut-off events. [2024-02-07 19:16:20,765 INFO L125 PetriNetUnfolderBase]: For 776/776 co-relation queries the response was YES. [2024-02-07 19:16:20,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17953 conditions, 8399 events. 6213/8399 cut-off events. For 776/776 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 42001 event pairs, 4933 based on Foata normal form. 0/7284 useless extension candidates. Maximal degree in co-relation 11477. Up to 8238 conditions per place. [2024-02-07 19:16:20,806 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 36 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2024-02-07 19:16:20,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 178 flow [2024-02-07 19:16:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:16:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:16:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-02-07 19:16:20,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45390070921985815 [2024-02-07 19:16:20,812 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 108 flow. Second operand 3 states and 64 transitions. [2024-02-07 19:16:20,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 178 flow [2024-02-07 19:16:20,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 42 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:16:20,814 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 104 flow [2024-02-07 19:16:20,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-02-07 19:16:20,815 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2024-02-07 19:16:20,815 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 104 flow [2024-02-07 19:16:20,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:20,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:16:20,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:16:20,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:16:20,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:16:20,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:16:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash 319084129, now seen corresponding path program 1 times [2024-02-07 19:16:20,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:16:20,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123977065] [2024-02-07 19:16:20,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:20,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:16:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:20,902 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 19:16:20,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:16:20,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123977065] [2024-02-07 19:16:20,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123977065] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:16:20,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:16:20,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:16:20,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127830029] [2024-02-07 19:16:20,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:16:20,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:16:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:16:20,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:16:20,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:16:20,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:16:20,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:20,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:16:20,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:16:20,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:16:21,480 INFO L124 PetriNetUnfolderBase]: 7157/9933 cut-off events. [2024-02-07 19:16:21,480 INFO L125 PetriNetUnfolderBase]: For 1104/1104 co-relation queries the response was YES. [2024-02-07 19:16:21,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20860 conditions, 9933 events. 7157/9933 cut-off events. For 1104/1104 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 49955 event pairs, 2201 based on Foata normal form. 136/9098 useless extension candidates. Maximal degree in co-relation 20852. Up to 6721 conditions per place. [2024-02-07 19:16:21,526 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 60 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-02-07 19:16:21,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 291 flow [2024-02-07 19:16:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:16:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:16:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-02-07 19:16:21,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-02-07 19:16:21,529 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 104 flow. Second operand 3 states and 90 transitions. [2024-02-07 19:16:21,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 291 flow [2024-02-07 19:16:21,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 67 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:16:21,533 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 119 flow [2024-02-07 19:16:21,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-02-07 19:16:21,534 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2024-02-07 19:16:21,534 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 119 flow [2024-02-07 19:16:21,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:21,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:16:21,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:16:21,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:16:21,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:16:21,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:16:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1737064334, now seen corresponding path program 1 times [2024-02-07 19:16:21,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:16:21,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070995677] [2024-02-07 19:16:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:21,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:16:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:21,636 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 19:16:21,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:16:21,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070995677] [2024-02-07 19:16:21,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070995677] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:16:21,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:16:21,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:16:21,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856153192] [2024-02-07 19:16:21,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:16:21,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:16:21,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:16:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:16:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:16:21,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:16:21,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:21,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:16:21,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:16:21,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:16:22,778 INFO L124 PetriNetUnfolderBase]: 13410/18877 cut-off events. [2024-02-07 19:16:22,779 INFO L125 PetriNetUnfolderBase]: For 3551/3551 co-relation queries the response was YES. [2024-02-07 19:16:22,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42600 conditions, 18877 events. 13410/18877 cut-off events. For 3551/3551 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 111161 event pairs, 4461 based on Foata normal form. 280/17590 useless extension candidates. Maximal degree in co-relation 42590. Up to 6754 conditions per place. [2024-02-07 19:16:22,853 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 98 selfloop transitions, 5 changer transitions 0/108 dead transitions. [2024-02-07 19:16:22,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 108 transitions, 497 flow [2024-02-07 19:16:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:16:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:16:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-02-07 19:16:22,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7340425531914894 [2024-02-07 19:16:22,855 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 119 flow. Second operand 4 states and 138 transitions. [2024-02-07 19:16:22,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 108 transitions, 497 flow [2024-02-07 19:16:22,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 108 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:16:22,858 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 157 flow [2024-02-07 19:16:22,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-02-07 19:16:22,858 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2024-02-07 19:16:22,859 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 157 flow [2024-02-07 19:16:22,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:22,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:16:22,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:16:22,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:16:22,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:16:22,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:16:22,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1073082891, now seen corresponding path program 1 times [2024-02-07 19:16:22,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:16:22,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877993717] [2024-02-07 19:16:22,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:22,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:16:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:22,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:16:22,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877993717] [2024-02-07 19:16:22,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877993717] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:16:22,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:16:22,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:16:22,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001317339] [2024-02-07 19:16:22,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:16:22,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:16:22,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:16:22,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:16:22,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:16:22,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:16:22,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:22,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:16:22,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:16:22,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:16:23,870 INFO L124 PetriNetUnfolderBase]: 11127/15638 cut-off events. [2024-02-07 19:16:23,871 INFO L125 PetriNetUnfolderBase]: For 8326/8326 co-relation queries the response was YES. [2024-02-07 19:16:23,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37492 conditions, 15638 events. 11127/15638 cut-off events. For 8326/8326 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 87882 event pairs, 9039 based on Foata normal form. 0/14910 useless extension candidates. Maximal degree in co-relation 37479. Up to 14928 conditions per place. [2024-02-07 19:16:23,933 INFO L140 encePairwiseOnDemand]: 45/47 looper letters, 39 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2024-02-07 19:16:23,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 233 flow [2024-02-07 19:16:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:16:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:16:23,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-02-07 19:16:23,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2024-02-07 19:16:23,935 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 157 flow. Second operand 3 states and 63 transitions. [2024-02-07 19:16:23,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 233 flow [2024-02-07 19:16:23,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 229 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-07 19:16:23,940 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 151 flow [2024-02-07 19:16:23,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-02-07 19:16:23,942 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2024-02-07 19:16:23,942 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 151 flow [2024-02-07 19:16:23,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:23,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:16:23,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:16:23,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:16:23,943 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:16:23,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:16:23,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1179081256, now seen corresponding path program 1 times [2024-02-07 19:16:23,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:16:23,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562630996] [2024-02-07 19:16:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:23,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:16:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:24,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:16:24,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562630996] [2024-02-07 19:16:24,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562630996] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:16:24,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500207246] [2024-02-07 19:16:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:24,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:16:24,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:16:24,006 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 19:16:24,028 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 19:16:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:24,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:16:24,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:16:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:24,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:16:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:24,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500207246] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:16:24,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:16:24,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-02-07 19:16:24,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100089371] [2024-02-07 19:16:24,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:16:24,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 19:16:24,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:16:24,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 19:16:24,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-02-07 19:16:24,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:16:24,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 151 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:24,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:16:24,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:16:24,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:16:26,397 INFO L124 PetriNetUnfolderBase]: 27909/39597 cut-off events. [2024-02-07 19:16:26,398 INFO L125 PetriNetUnfolderBase]: For 20907/20907 co-relation queries the response was YES. [2024-02-07 19:16:26,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92979 conditions, 39597 events. 27909/39597 cut-off events. For 20907/20907 co-relation queries the response was YES. Maximal size of possible extension queue 974. Compared 244278 event pairs, 5633 based on Foata normal form. 234/38583 useless extension candidates. Maximal degree in co-relation 92964. Up to 8538 conditions per place. [2024-02-07 19:16:26,644 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 215 selfloop transitions, 16 changer transitions 0/236 dead transitions. [2024-02-07 19:16:26,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 236 transitions, 1139 flow [2024-02-07 19:16:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:16:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:16:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 299 transitions. [2024-02-07 19:16:26,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7952127659574468 [2024-02-07 19:16:26,646 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 151 flow. Second operand 8 states and 299 transitions. [2024-02-07 19:16:26,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 236 transitions, 1139 flow [2024-02-07 19:16:26,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 236 transitions, 1138 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:16:26,652 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 303 flow [2024-02-07 19:16:26,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=303, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-02-07 19:16:26,652 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2024-02-07 19:16:26,653 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 303 flow [2024-02-07 19:16:26,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:26,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:16:26,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:16:26,668 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 19:16:26,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-07 19:16:26,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:16:26,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:16:26,865 INFO L85 PathProgramCache]: Analyzing trace with hash 403135095, now seen corresponding path program 1 times [2024-02-07 19:16:26,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:16:26,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105331765] [2024-02-07 19:16:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:16:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:26,917 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 19:16:26,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:16:26,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105331765] [2024-02-07 19:16:26,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105331765] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:16:26,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:16:26,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:16:26,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77599829] [2024-02-07 19:16:26,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:16:26,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:16:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:16:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:16:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:16:26,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:16:26,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:26,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:16:26,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:16:26,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:16:30,759 INFO L124 PetriNetUnfolderBase]: 50340/71482 cut-off events. [2024-02-07 19:16:30,759 INFO L125 PetriNetUnfolderBase]: For 104873/104873 co-relation queries the response was YES. [2024-02-07 19:16:31,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181813 conditions, 71482 events. 50340/71482 cut-off events. For 104873/104873 co-relation queries the response was YES. Maximal size of possible extension queue 1717. Compared 468594 event pairs, 15607 based on Foata normal form. 968/71407 useless extension candidates. Maximal degree in co-relation 181791. Up to 24496 conditions per place. [2024-02-07 19:16:31,286 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 129 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2024-02-07 19:16:31,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 139 transitions, 1079 flow [2024-02-07 19:16:31,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:16:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:16:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 19:16:31,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675531914893617 [2024-02-07 19:16:31,288 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 303 flow. Second operand 4 states and 127 transitions. [2024-02-07 19:16:31,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 139 transitions, 1079 flow [2024-02-07 19:16:31,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 139 transitions, 935 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-02-07 19:16:31,422 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 295 flow [2024-02-07 19:16:31,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-02-07 19:16:31,423 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 19 predicate places. [2024-02-07 19:16:31,423 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 295 flow [2024-02-07 19:16:31,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:31,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:16:31,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:16:31,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:16:31,424 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread4Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:16:31,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:16:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1295866325, now seen corresponding path program 1 times [2024-02-07 19:16:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:16:31,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076889265] [2024-02-07 19:16:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:31,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:16:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:31,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:16:31,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076889265] [2024-02-07 19:16:31,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076889265] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:16:31,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579688144] [2024-02-07 19:16:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:31,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:16:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:16:31,482 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 19:16:31,483 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 19:16:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:31,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 19:16:31,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:16:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:31,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:16:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:31,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579688144] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:16:31,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:16:31,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-02-07 19:16:31,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309193172] [2024-02-07 19:16:31,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:16:31,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 19:16:31,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:16:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 19:16:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-02-07 19:16:31,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:16:31,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 295 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:31,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:16:31,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:16:31,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:16:42,366 INFO L124 PetriNetUnfolderBase]: 124578/178004 cut-off events. [2024-02-07 19:16:42,366 INFO L125 PetriNetUnfolderBase]: For 233028/233028 co-relation queries the response was YES. [2024-02-07 19:16:42,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455913 conditions, 178004 events. 124578/178004 cut-off events. For 233028/233028 co-relation queries the response was YES. Maximal size of possible extension queue 3308. Compared 1281176 event pairs, 22974 based on Foata normal form. 968/177929 useless extension candidates. Maximal degree in co-relation 455887. Up to 35667 conditions per place. [2024-02-07 19:16:43,700 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 289 selfloop transitions, 16 changer transitions 0/310 dead transitions. [2024-02-07 19:16:43,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 310 transitions, 2181 flow [2024-02-07 19:16:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:16:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:16:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 275 transitions. [2024-02-07 19:16:43,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7313829787234043 [2024-02-07 19:16:43,703 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 295 flow. Second operand 8 states and 275 transitions. [2024-02-07 19:16:43,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 310 transitions, 2181 flow [2024-02-07 19:16:43,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 310 transitions, 2177 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-07 19:16:43,977 INFO L231 Difference]: Finished difference. Result has 83 places, 70 transitions, 444 flow [2024-02-07 19:16:43,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=83, PETRI_TRANSITIONS=70} [2024-02-07 19:16:43,978 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 32 predicate places. [2024-02-07 19:16:43,978 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 70 transitions, 444 flow [2024-02-07 19:16:43,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:43,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:16:43,978 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:16:43,989 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 19:16:44,180 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,SelfDestructingSolverStorable7 [2024-02-07 19:16:44,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT (and 10 more)] === [2024-02-07 19:16:44,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:16:44,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1590133578, now seen corresponding path program 2 times [2024-02-07 19:16:44,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:16:44,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956867031] [2024-02-07 19:16:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:16:44,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:16:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:16:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:44,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:16:44,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956867031] [2024-02-07 19:16:44,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956867031] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:16:44,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944984005] [2024-02-07 19:16:44,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:16:44,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:16:44,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:16:44,273 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 19:16:44,304 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 19:16:44,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:16:44,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:16:44,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 19:16:44,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:16:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:44,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:16:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:16:44,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944984005] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:16:44,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:16:44,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 19:16:44,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086003903] [2024-02-07 19:16:44,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:16:44,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 19:16:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:16:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 19:16:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-02-07 19:16:44,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2024-02-07 19:16:44,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 70 transitions, 444 flow. Second operand has 17 states, 17 states have (on average 11.352941176470589) internal successors, (193), 17 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:16:44,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:16:44,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2024-02-07 19:16:44,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand