./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/parallel-misc-3.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/parallel-misc-3.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:35:53,355 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:35:53,439 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:35:53,444 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:35:53,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:35:53,480 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:35:53,481 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:35:53,481 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:35:53,482 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:35:53,486 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:35:53,486 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:35:53,487 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:35:53,488 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:35:53,489 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:35:53,489 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:35:53,489 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:35:53,490 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:35:53,490 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:35:53,490 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:35:53,490 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:35:53,491 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:35:53,492 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:35:53,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:35:53,492 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:35:53,493 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:35:53,493 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:35:53,493 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:35:53,493 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:35:53,494 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:35:53,494 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:35:53,495 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:35:53,495 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:35:53,495 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:35:53,496 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:35:53,496 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:35:53,496 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:35:53,496 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:35:53,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:35:53,497 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:35:53,497 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:35:53,497 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:35:53,497 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:35:53,498 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:35:53,498 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:35:53,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:35:53,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:35:53,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:35:53,801 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:35:53,801 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:35:53,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/parallel-misc-3.wvr.yml/witness.yml [2024-02-07 14:35:53,879 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:35:53,879 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:35:53,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2024-02-07 14:35:55,071 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:35:55,255 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:35:55,255 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c [2024-02-07 14:35:55,261 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c25818ca/14932418d80f4ea7ab1aa99c3078e154/FLAG2eb4a0d51 [2024-02-07 14:35:55,634 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c25818ca/14932418d80f4ea7ab1aa99c3078e154 [2024-02-07 14:35:55,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:35:55,636 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:35:55,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:35:55,639 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:35:55,642 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:35:55,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:35:53" (1/2) ... [2024-02-07 14:35:55,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4257b5a7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:35:55, skipping insertion in model container [2024-02-07 14:35:55,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:35:53" (1/2) ... [2024-02-07 14:35:55,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3d92639b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:35:55, skipping insertion in model container [2024-02-07 14:35:55,645 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:35:55" (2/2) ... [2024-02-07 14:35:55,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4257b5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:55, skipping insertion in model container [2024-02-07 14:35:55,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:35:55" (2/2) ... [2024-02-07 14:35:55,647 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:35:55,676 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:35:55,677 INFO L76 edCorrectnessWitness]: Location invariant before [L77-L77] d2 == (_Bool)0 || d2 == (_Bool)1 [2024-02-07 14:35:55,680 INFO L76 edCorrectnessWitness]: Location invariant before [L52-L52] d1 == (_Bool)0 || d1 == (_Bool)1 [2024-02-07 14:35:55,680 INFO L76 edCorrectnessWitness]: Location invariant before [L53-L53] d1 == (_Bool)0 || d1 == (_Bool)1 [2024-02-07 14:35:55,680 INFO L76 edCorrectnessWitness]: Location invariant before [L91-L91] d2 == (_Bool)1 [2024-02-07 14:35:55,680 INFO L76 edCorrectnessWitness]: Location invariant before [L65-L65] d2 == (_Bool)0 || d2 == (_Bool)1 [2024-02-07 14:35:55,681 INFO L76 edCorrectnessWitness]: Location invariant before [L46-L46] -2147483647 <= pos [2024-02-07 14:35:55,681 INFO L76 edCorrectnessWitness]: Location invariant before [L68-L68] -2147483646 <= pos [2024-02-07 14:35:55,681 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] d1 == (_Bool)0 || d1 == (_Bool)1 [2024-02-07 14:35:55,681 INFO L76 edCorrectnessWitness]: Location invariant before [L74-L74] d2 == (_Bool)0 || d2 == (_Bool)1 [2024-02-07 14:35:55,681 INFO L76 edCorrectnessWitness]: Location invariant before [L43-L43] d1 == (_Bool)0 || d1 == (_Bool)1 [2024-02-07 14:35:55,681 INFO L76 edCorrectnessWitness]: Location invariant before [L90-L90] d1 == (_Bool)1 [2024-02-07 14:35:55,682 INFO L76 edCorrectnessWitness]: Location invariant before [L50-L50] pos <= 2147483646 [2024-02-07 14:35:55,682 INFO L76 edCorrectnessWitness]: Location invariant before [L75-L75] d2 == (_Bool)0 || d2 == (_Bool)1 [2024-02-07 14:35:55,682 INFO L76 edCorrectnessWitness]: Location invariant before [L72-L72] pos <= 2147483645 [2024-02-07 14:35:55,682 INFO L76 edCorrectnessWitness]: Location invariant before [L92-L92] g1 == (_Bool)1 [2024-02-07 14:35:55,682 INFO L76 edCorrectnessWitness]: Location invariant before [L95-L95] g2 == (_Bool)1 [2024-02-07 14:35:55,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:35:55,905 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c[2436,2449] [2024-02-07 14:35:55,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:35:55,917 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:35:55,997 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-3.wvr.c[2436,2449] [2024-02-07 14:35:55,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:35:56,014 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:35:56,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56 WrapperNode [2024-02-07 14:35:56,015 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:35:56,016 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:35:56,016 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:35:56,016 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:35:56,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,037 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,060 INFO L138 Inliner]: procedures = 21, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2024-02-07 14:35:56,060 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:35:56,061 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:35:56,061 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:35:56,061 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:35:56,071 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,079 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,112 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 14:35:56,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,125 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,129 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,133 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,138 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:35:56,139 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:35:56,139 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:35:56,139 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:35:56,140 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (1/1) ... [2024-02-07 14:35:56,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:35:56,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:35:56,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 14:35:56,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 14:35:56,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:35:56,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:35:56,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:35:56,208 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:35:56,208 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:35:56,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:35:56,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:35:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:35:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:35:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:35:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:35:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:35:56,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:35:56,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:35:56,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:35:56,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:35:56,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:35:56,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:35:56,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:35:56,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:35:56,212 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:35:56,322 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:35:56,324 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:35:56,604 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:35:56,605 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:35:56,712 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:35:56,712 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:35:56,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:35:56 BoogieIcfgContainer [2024-02-07 14:35:56,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:35:56,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:35:56,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:35:56,720 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:35:56,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:35:53" (1/4) ... [2024-02-07 14:35:56,722 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d53e93 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:35:56, skipping insertion in model container [2024-02-07 14:35:56,723 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:35:55" (2/4) ... [2024-02-07 14:35:56,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d53e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:35:56, skipping insertion in model container [2024-02-07 14:35:56,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:35:56" (3/4) ... [2024-02-07 14:35:56,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d53e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:35:56, skipping insertion in model container [2024-02-07 14:35:56,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:35:56" (4/4) ... [2024-02-07 14:35:56,727 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-3.wvr.c [2024-02-07 14:35:56,744 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:35:56,745 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2024-02-07 14:35:56,745 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:35:56,809 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:35:56,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 63 transitions, 140 flow [2024-02-07 14:35:56,926 INFO L124 PetriNetUnfolderBase]: 8/61 cut-off events. [2024-02-07 14:35:56,928 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:35:56,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 61 events. 8/61 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 145 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2024-02-07 14:35:56,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 63 transitions, 140 flow [2024-02-07 14:35:56,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 60 transitions, 132 flow [2024-02-07 14:35:56,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:35:56,954 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;@759f0f7b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:35:56,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-02-07 14:35:56,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:35:56,957 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:35:56,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:35:56,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:56,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:35:56,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:35:56,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:56,965 INFO L85 PathProgramCache]: Analyzing trace with hash 9915, now seen corresponding path program 1 times [2024-02-07 14:35:56,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:56,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680752109] [2024-02-07 14:35:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:56,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:57,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:57,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680752109] [2024-02-07 14:35:57,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680752109] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:57,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:57,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:35:57,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366067006] [2024-02-07 14:35:57,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:57,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:35:57,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:35:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:35:57,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 63 [2024-02-07 14:35:57,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:57,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:57,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 63 [2024-02-07 14:35:57,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:57,579 INFO L124 PetriNetUnfolderBase]: 873/1563 cut-off events. [2024-02-07 14:35:57,580 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-02-07 14:35:57,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2866 conditions, 1563 events. 873/1563 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8745 event pairs, 119 based on Foata normal form. 31/1114 useless extension candidates. Maximal degree in co-relation 2580. Up to 997 conditions per place. [2024-02-07 14:35:57,597 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 58 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-02-07 14:35:57,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 301 flow [2024-02-07 14:35:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:35:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:35:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-02-07 14:35:57,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6878306878306878 [2024-02-07 14:35:57,615 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 132 flow. Second operand 3 states and 130 transitions. [2024-02-07 14:35:57,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 301 flow [2024-02-07 14:35:57,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 287 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:35:57,628 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 138 flow [2024-02-07 14:35:57,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2024-02-07 14:35:57,634 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2024-02-07 14:35:57,634 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 138 flow [2024-02-07 14:35:57,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:57,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:57,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-07 14:35:57,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:35:57,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:35:57,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash 307666, now seen corresponding path program 1 times [2024-02-07 14:35:57,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:57,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48213354] [2024-02-07 14:35:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:57,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:57,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:57,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48213354] [2024-02-07 14:35:57,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48213354] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:57,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:57,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:35:57,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825427580] [2024-02-07 14:35:57,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:57,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:35:57,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:57,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:35:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:35:57,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 63 [2024-02-07 14:35:57,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:57,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:57,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 63 [2024-02-07 14:35:57,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:58,039 INFO L124 PetriNetUnfolderBase]: 987/1850 cut-off events. [2024-02-07 14:35:58,040 INFO L125 PetriNetUnfolderBase]: For 87/111 co-relation queries the response was YES. [2024-02-07 14:35:58,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 1850 events. 987/1850 cut-off events. For 87/111 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11861 event pairs, 159 based on Foata normal form. 40/1451 useless extension candidates. Maximal degree in co-relation 1086. Up to 1182 conditions per place. [2024-02-07 14:35:58,057 INFO L140 encePairwiseOnDemand]: 57/63 looper letters, 58 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-02-07 14:35:58,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 79 transitions, 303 flow [2024-02-07 14:35:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:35:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:35:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2024-02-07 14:35:58,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6772486772486772 [2024-02-07 14:35:58,064 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 138 flow. Second operand 3 states and 128 transitions. [2024-02-07 14:35:58,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 79 transitions, 303 flow [2024-02-07 14:35:58,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:35:58,069 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 150 flow [2024-02-07 14:35:58,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2024-02-07 14:35:58,070 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2024-02-07 14:35:58,070 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 150 flow [2024-02-07 14:35:58,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:58,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:58,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-07 14:35:58,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:35:58,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:35:58,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:58,075 INFO L85 PathProgramCache]: Analyzing trace with hash 9537970, now seen corresponding path program 1 times [2024-02-07 14:35:58,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:58,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726087141] [2024-02-07 14:35:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:58,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:58,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726087141] [2024-02-07 14:35:58,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726087141] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:58,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:58,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:35:58,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341340687] [2024-02-07 14:35:58,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:58,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:35:58,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:35:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:35:58,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-02-07 14:35:58,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:58,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:58,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-02-07 14:35:58,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:58,432 INFO L124 PetriNetUnfolderBase]: 1071/2155 cut-off events. [2024-02-07 14:35:58,433 INFO L125 PetriNetUnfolderBase]: For 93/123 co-relation queries the response was YES. [2024-02-07 14:35:58,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4072 conditions, 2155 events. 1071/2155 cut-off events. For 93/123 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14846 event pairs, 295 based on Foata normal form. 61/1708 useless extension candidates. Maximal degree in co-relation 1500. Up to 771 conditions per place. [2024-02-07 14:35:58,448 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 56 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2024-02-07 14:35:58,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 82 transitions, 318 flow [2024-02-07 14:35:58,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:35:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:35:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-02-07 14:35:58,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2024-02-07 14:35:58,451 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 150 flow. Second operand 3 states and 141 transitions. [2024-02-07 14:35:58,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 82 transitions, 318 flow [2024-02-07 14:35:58,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 82 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:35:58,457 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 158 flow [2024-02-07 14:35:58,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-02-07 14:35:58,458 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2024-02-07 14:35:58,459 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 158 flow [2024-02-07 14:35:58,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:58,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:58,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:35:58,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:35:58,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:35:58,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:58,460 INFO L85 PathProgramCache]: Analyzing trace with hash 295677368, now seen corresponding path program 1 times [2024-02-07 14:35:58,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:58,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498849682] [2024-02-07 14:35:58,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:58,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:58,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:58,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498849682] [2024-02-07 14:35:58,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498849682] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:58,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:58,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:35:58,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307321188] [2024-02-07 14:35:58,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:58,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:35:58,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:35:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:35:58,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-02-07 14:35:58,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:58,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:58,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-02-07 14:35:58,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:58,816 INFO L124 PetriNetUnfolderBase]: 1600/3208 cut-off events. [2024-02-07 14:35:58,816 INFO L125 PetriNetUnfolderBase]: For 203/263 co-relation queries the response was YES. [2024-02-07 14:35:58,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6136 conditions, 3208 events. 1600/3208 cut-off events. For 203/263 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23204 event pairs, 500 based on Foata normal form. 92/2525 useless extension candidates. Maximal degree in co-relation 3152. Up to 1244 conditions per place. [2024-02-07 14:35:58,838 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 58 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2024-02-07 14:35:58,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 338 flow [2024-02-07 14:35:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:35:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:35:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-02-07 14:35:58,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.746031746031746 [2024-02-07 14:35:58,840 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 158 flow. Second operand 3 states and 141 transitions. [2024-02-07 14:35:58,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 338 flow [2024-02-07 14:35:58,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:35:58,844 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 166 flow [2024-02-07 14:35:58,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-02-07 14:35:58,845 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2024-02-07 14:35:58,846 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 166 flow [2024-02-07 14:35:58,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:58,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:58,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:58,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:35:58,847 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:35:58,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:58,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1580579633, now seen corresponding path program 1 times [2024-02-07 14:35:58,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:58,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823735300] [2024-02-07 14:35:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:58,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:58,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:58,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823735300] [2024-02-07 14:35:58,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823735300] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:58,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:58,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:35:58,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118397400] [2024-02-07 14:35:58,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:58,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:35:58,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:58,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:35:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:35:58,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 14:35:58,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:58,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:58,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 14:35:58,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:59,140 INFO L124 PetriNetUnfolderBase]: 1598/3169 cut-off events. [2024-02-07 14:35:59,141 INFO L125 PetriNetUnfolderBase]: For 216/281 co-relation queries the response was YES. [2024-02-07 14:35:59,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6169 conditions, 3169 events. 1598/3169 cut-off events. For 216/281 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22951 event pairs, 552 based on Foata normal form. 0/2384 useless extension candidates. Maximal degree in co-relation 3413. Up to 2216 conditions per place. [2024-02-07 14:35:59,163 INFO L140 encePairwiseOnDemand]: 58/63 looper letters, 39 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2024-02-07 14:35:59,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 261 flow [2024-02-07 14:35:59,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:35:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:35:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-02-07 14:35:59,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-02-07 14:35:59,165 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 166 flow. Second operand 3 states and 127 transitions. [2024-02-07 14:35:59,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 261 flow [2024-02-07 14:35:59,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 65 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:35:59,170 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 185 flow [2024-02-07 14:35:59,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-02-07 14:35:59,172 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2024-02-07 14:35:59,172 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 185 flow [2024-02-07 14:35:59,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:59,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:59,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:59,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:35:59,174 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:35:59,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:59,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1481384205, now seen corresponding path program 1 times [2024-02-07 14:35:59,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:59,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343252808] [2024-02-07 14:35:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:59,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:59,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:59,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:59,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343252808] [2024-02-07 14:35:59,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343252808] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:59,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:59,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:35:59,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582119936] [2024-02-07 14:35:59,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:59,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:35:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:35:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:35:59,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 63 [2024-02-07 14:35:59,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:59,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:59,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 63 [2024-02-07 14:35:59,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:59,808 INFO L124 PetriNetUnfolderBase]: 2892/5162 cut-off events. [2024-02-07 14:35:59,808 INFO L125 PetriNetUnfolderBase]: For 1064/1266 co-relation queries the response was YES. [2024-02-07 14:35:59,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11572 conditions, 5162 events. 2892/5162 cut-off events. For 1064/1266 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 34506 event pairs, 1376 based on Foata normal form. 299/4262 useless extension candidates. Maximal degree in co-relation 6613. Up to 3021 conditions per place. [2024-02-07 14:35:59,842 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 63 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2024-02-07 14:35:59,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 382 flow [2024-02-07 14:35:59,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:35:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:35:59,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-02-07 14:35:59,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-02-07 14:35:59,844 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 185 flow. Second operand 4 states and 154 transitions. [2024-02-07 14:35:59,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 382 flow [2024-02-07 14:35:59,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:35:59,848 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 215 flow [2024-02-07 14:35:59,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-02-07 14:35:59,849 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2024-02-07 14:35:59,849 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 215 flow [2024-02-07 14:35:59,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:59,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:59,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:59,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:35:59,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:35:59,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:59,851 INFO L85 PathProgramCache]: Analyzing trace with hash -501383904, now seen corresponding path program 1 times [2024-02-07 14:35:59,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:59,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360314439] [2024-02-07 14:35:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:59,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:59,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:59,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360314439] [2024-02-07 14:35:59,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360314439] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:59,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:59,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:35:59,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120335418] [2024-02-07 14:35:59,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:59,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:35:59,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:59,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:35:59,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:36:00,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 63 [2024-02-07 14:36:00,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:00,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:00,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 63 [2024-02-07 14:36:00,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:00,674 INFO L124 PetriNetUnfolderBase]: 3063/6082 cut-off events. [2024-02-07 14:36:00,675 INFO L125 PetriNetUnfolderBase]: For 3444/3764 co-relation queries the response was YES. [2024-02-07 14:36:00,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14634 conditions, 6082 events. 3063/6082 cut-off events. For 3444/3764 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 45097 event pairs, 1850 based on Foata normal form. 393/5441 useless extension candidates. Maximal degree in co-relation 7888. Up to 3560 conditions per place. [2024-02-07 14:36:00,704 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 62 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2024-02-07 14:36:00,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 83 transitions, 425 flow [2024-02-07 14:36:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:36:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:36:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-02-07 14:36:00,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-02-07 14:36:00,706 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 215 flow. Second operand 4 states and 152 transitions. [2024-02-07 14:36:00,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 83 transitions, 425 flow [2024-02-07 14:36:00,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 83 transitions, 418 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-02-07 14:36:00,712 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 247 flow [2024-02-07 14:36:00,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-02-07 14:36:00,712 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2024-02-07 14:36:00,713 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 247 flow [2024-02-07 14:36:00,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:00,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:00,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:00,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:36:00,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:00,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:00,714 INFO L85 PathProgramCache]: Analyzing trace with hash -753966954, now seen corresponding path program 1 times [2024-02-07 14:36:00,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:00,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067475293] [2024-02-07 14:36:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:00,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:00,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:00,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067475293] [2024-02-07 14:36:00,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067475293] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:00,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:36:00,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:36:00,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839011259] [2024-02-07 14:36:00,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:00,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:36:00,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:00,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:36:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:36:00,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 14:36:00,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:00,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:00,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 14:36:00,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:01,363 INFO L124 PetriNetUnfolderBase]: 2541/6154 cut-off events. [2024-02-07 14:36:01,363 INFO L125 PetriNetUnfolderBase]: For 4556/4992 co-relation queries the response was YES. [2024-02-07 14:36:01,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15129 conditions, 6154 events. 2541/6154 cut-off events. For 4556/4992 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 51364 event pairs, 838 based on Foata normal form. 0/5304 useless extension candidates. Maximal degree in co-relation 7684. Up to 2382 conditions per place. [2024-02-07 14:36:01,403 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 65 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-02-07 14:36:01,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 510 flow [2024-02-07 14:36:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:36:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:36:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 147 transitions. [2024-02-07 14:36:01,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2024-02-07 14:36:01,405 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 247 flow. Second operand 3 states and 147 transitions. [2024-02-07 14:36:01,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 510 flow [2024-02-07 14:36:01,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 503 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-02-07 14:36:01,411 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 302 flow [2024-02-07 14:36:01,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=302, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-02-07 14:36:01,412 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 14 predicate places. [2024-02-07 14:36:01,412 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 302 flow [2024-02-07 14:36:01,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:01,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:01,413 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:01,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:36:01,413 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:01,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1227140617, now seen corresponding path program 1 times [2024-02-07 14:36:01,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:01,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626710009] [2024-02-07 14:36:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:01,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:01,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626710009] [2024-02-07 14:36:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626710009] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430582661] [2024-02-07 14:36:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:01,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:01,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:01,468 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:01,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:36:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:01,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-07 14:36:01,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:01,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:36:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:01,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430582661] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:36:01,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:36:01,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-02-07 14:36:01,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284610726] [2024-02-07 14:36:01,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:36:01,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:36:01,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:01,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:36:01,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:36:01,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 14:36:01,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 32.57142857142857) internal successors, (228), 7 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:01,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:01,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 14:36:01,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:02,461 INFO L124 PetriNetUnfolderBase]: 2589/6895 cut-off events. [2024-02-07 14:36:02,461 INFO L125 PetriNetUnfolderBase]: For 8099/8585 co-relation queries the response was YES. [2024-02-07 14:36:02,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18242 conditions, 6895 events. 2589/6895 cut-off events. For 8099/8585 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 61470 event pairs, 368 based on Foata normal form. 274/6853 useless extension candidates. Maximal degree in co-relation 9593. Up to 2180 conditions per place. [2024-02-07 14:36:02,503 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 106 selfloop transitions, 17 changer transitions 0/146 dead transitions. [2024-02-07 14:36:02,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 146 transitions, 884 flow [2024-02-07 14:36:02,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:36:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:36:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 310 transitions. [2024-02-07 14:36:02,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7029478458049887 [2024-02-07 14:36:02,505 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 302 flow. Second operand 7 states and 310 transitions. [2024-02-07 14:36:02,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 146 transitions, 884 flow [2024-02-07 14:36:02,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 146 transitions, 844 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-02-07 14:36:02,514 INFO L231 Difference]: Finished difference. Result has 80 places, 79 transitions, 395 flow [2024-02-07 14:36:02,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=395, PETRI_PLACES=80, PETRI_TRANSITIONS=79} [2024-02-07 14:36:02,515 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 21 predicate places. [2024-02-07 14:36:02,515 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 79 transitions, 395 flow [2024-02-07 14:36:02,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 32.57142857142857) internal successors, (228), 7 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:02,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:02,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:02,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:02,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:02,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:02,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:02,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1833884729, now seen corresponding path program 1 times [2024-02-07 14:36:02,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:02,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635789756] [2024-02-07 14:36:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:02,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 14:36:02,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:02,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635789756] [2024-02-07 14:36:02,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635789756] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:02,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:36:02,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:36:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528108116] [2024-02-07 14:36:02,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:02,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:36:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:36:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:36:02,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 63 [2024-02-07 14:36:02,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 79 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:02,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:02,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 63 [2024-02-07 14:36:02,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:03,545 INFO L124 PetriNetUnfolderBase]: 2589/6543 cut-off events. [2024-02-07 14:36:03,546 INFO L125 PetriNetUnfolderBase]: For 9621/10040 co-relation queries the response was YES. [2024-02-07 14:36:03,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18050 conditions, 6543 events. 2589/6543 cut-off events. For 9621/10040 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 55796 event pairs, 1843 based on Foata normal form. 584/6681 useless extension candidates. Maximal degree in co-relation 9424. Up to 4418 conditions per place. [2024-02-07 14:36:03,588 INFO L140 encePairwiseOnDemand]: 58/63 looper letters, 55 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2024-02-07 14:36:03,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 75 transitions, 489 flow [2024-02-07 14:36:03,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:36:03,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:36:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-02-07 14:36:03,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-02-07 14:36:03,592 INFO L175 Difference]: Start difference. First operand has 80 places, 79 transitions, 395 flow. Second operand 3 states and 112 transitions. [2024-02-07 14:36:03,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 75 transitions, 489 flow [2024-02-07 14:36:03,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 75 transitions, 476 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-02-07 14:36:03,605 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 366 flow [2024-02-07 14:36:03,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=366, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-02-07 14:36:03,607 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 18 predicate places. [2024-02-07 14:36:03,607 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 366 flow [2024-02-07 14:36:03,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:03,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:03,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:03,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 14:36:03,608 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:03,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:03,609 INFO L85 PathProgramCache]: Analyzing trace with hash 318164385, now seen corresponding path program 1 times [2024-02-07 14:36:03,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:03,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358021280] [2024-02-07 14:36:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:03,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:03,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:03,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358021280] [2024-02-07 14:36:03,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358021280] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:03,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:36:03,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:36:03,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353473444] [2024-02-07 14:36:03,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:03,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:36:03,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:03,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:36:03,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:36:03,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 63 [2024-02-07 14:36:03,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:03,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:03,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 63 [2024-02-07 14:36:03,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:04,510 INFO L124 PetriNetUnfolderBase]: 3523/7721 cut-off events. [2024-02-07 14:36:04,511 INFO L125 PetriNetUnfolderBase]: For 10280/10532 co-relation queries the response was YES. [2024-02-07 14:36:04,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21741 conditions, 7721 events. 3523/7721 cut-off events. For 10280/10532 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 60948 event pairs, 1591 based on Foata normal form. 642/7837 useless extension candidates. Maximal degree in co-relation 21716. Up to 3829 conditions per place. [2024-02-07 14:36:04,553 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 79 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-02-07 14:36:04,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 95 transitions, 638 flow [2024-02-07 14:36:04,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:36:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:36:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-02-07 14:36:04,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-02-07 14:36:04,555 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 366 flow. Second operand 4 states and 141 transitions. [2024-02-07 14:36:04,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 95 transitions, 638 flow [2024-02-07 14:36:04,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 95 transitions, 637 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:36:04,569 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 355 flow [2024-02-07 14:36:04,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=355, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-02-07 14:36:04,570 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 16 predicate places. [2024-02-07 14:36:04,570 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 355 flow [2024-02-07 14:36:04,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:04,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:04,571 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:04,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 14:36:04,571 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:04,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:04,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1852715364, now seen corresponding path program 1 times [2024-02-07 14:36:04,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:04,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716217466] [2024-02-07 14:36:04,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:04,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:04,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:04,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716217466] [2024-02-07 14:36:04,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716217466] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:04,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697584952] [2024-02-07 14:36:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:04,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:04,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:04,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:04,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:36:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:04,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:36:04,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:04,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:36:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697584952] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:04,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:36:04,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2024-02-07 14:36:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209801953] [2024-02-07 14:36:04,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:04,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:36:04,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:04,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:36:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:36:04,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 14:36:04,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:04,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:04,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 14:36:04,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:05,416 INFO L124 PetriNetUnfolderBase]: 2591/6351 cut-off events. [2024-02-07 14:36:05,417 INFO L125 PetriNetUnfolderBase]: For 8454/8454 co-relation queries the response was YES. [2024-02-07 14:36:05,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17761 conditions, 6351 events. 2591/6351 cut-off events. For 8454/8454 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 52036 event pairs, 481 based on Foata normal form. 44/5993 useless extension candidates. Maximal degree in co-relation 17735. Up to 3505 conditions per place. [2024-02-07 14:36:05,451 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 80 selfloop transitions, 16 changer transitions 0/111 dead transitions. [2024-02-07 14:36:05,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 749 flow [2024-02-07 14:36:05,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:36:05,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:36:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2024-02-07 14:36:05,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2024-02-07 14:36:05,453 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 355 flow. Second operand 4 states and 183 transitions. [2024-02-07 14:36:05,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 749 flow [2024-02-07 14:36:05,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 111 transitions, 738 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:36:05,469 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 527 flow [2024-02-07 14:36:05,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=527, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-02-07 14:36:05,470 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 19 predicate places. [2024-02-07 14:36:05,470 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 527 flow [2024-02-07 14:36:05,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:05,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:05,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:05,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:05,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-07 14:36:05,684 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:05,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:05,685 INFO L85 PathProgramCache]: Analyzing trace with hash -235176581, now seen corresponding path program 1 times [2024-02-07 14:36:05,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:05,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329405865] [2024-02-07 14:36:05,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:05,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:05,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:05,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329405865] [2024-02-07 14:36:05,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329405865] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:05,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220444437] [2024-02-07 14:36:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:05,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:05,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:05,736 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:05,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:36:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:05,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:36:05,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:05,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:05,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:36:05,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220444437] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:05,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:36:05,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2024-02-07 14:36:05,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019081114] [2024-02-07 14:36:05,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:05,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:36:05,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:05,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:36:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:36:05,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 14:36:05,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 527 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:05,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:05,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 14:36:05,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:06,571 INFO L124 PetriNetUnfolderBase]: 2953/7334 cut-off events. [2024-02-07 14:36:06,571 INFO L125 PetriNetUnfolderBase]: For 14706/14706 co-relation queries the response was YES. [2024-02-07 14:36:06,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21250 conditions, 7334 events. 2953/7334 cut-off events. For 14706/14706 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 60882 event pairs, 1137 based on Foata normal form. 42/6914 useless extension candidates. Maximal degree in co-relation 21221. Up to 3718 conditions per place. [2024-02-07 14:36:06,617 INFO L140 encePairwiseOnDemand]: 55/63 looper letters, 107 selfloop transitions, 23 changer transitions 0/145 dead transitions. [2024-02-07 14:36:06,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 145 transitions, 1162 flow [2024-02-07 14:36:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:36:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:36:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2024-02-07 14:36:06,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.753968253968254 [2024-02-07 14:36:06,619 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 527 flow. Second operand 4 states and 190 transitions. [2024-02-07 14:36:06,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 145 transitions, 1162 flow [2024-02-07 14:36:06,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 145 transitions, 1162 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:36:06,642 INFO L231 Difference]: Finished difference. Result has 84 places, 102 transitions, 836 flow [2024-02-07 14:36:06,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=836, PETRI_PLACES=84, PETRI_TRANSITIONS=102} [2024-02-07 14:36:06,644 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 25 predicate places. [2024-02-07 14:36:06,644 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 102 transitions, 836 flow [2024-02-07 14:36:06,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:06,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:06,644 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:06,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:06,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:06,859 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:06,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:06,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1827420436, now seen corresponding path program 1 times [2024-02-07 14:36:06,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:06,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230103307] [2024-02-07 14:36:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:06,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-02-07 14:36:06,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:06,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230103307] [2024-02-07 14:36:06,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230103307] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:06,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425620327] [2024-02-07 14:36:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:06,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:06,983 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:06,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 14:36:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:07,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:36:07,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-07 14:36:07,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:36:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-02-07 14:36:07,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425620327] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:36:07,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:36:07,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 5 [2024-02-07 14:36:07,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228678825] [2024-02-07 14:36:07,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:36:07,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:36:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:07,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:36:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:36:07,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 14:36:07,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 102 transitions, 836 flow. Second operand has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:07,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:07,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 14:36:07,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:08,533 INFO L124 PetriNetUnfolderBase]: 5434/13853 cut-off events. [2024-02-07 14:36:08,533 INFO L125 PetriNetUnfolderBase]: For 38283/38495 co-relation queries the response was YES. [2024-02-07 14:36:08,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40981 conditions, 13853 events. 5434/13853 cut-off events. For 38283/38495 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 128949 event pairs, 518 based on Foata normal form. 256/13275 useless extension candidates. Maximal degree in co-relation 40947. Up to 3045 conditions per place. [2024-02-07 14:36:08,614 INFO L140 encePairwiseOnDemand]: 54/63 looper letters, 166 selfloop transitions, 75 changer transitions 0/256 dead transitions. [2024-02-07 14:36:08,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 256 transitions, 2280 flow [2024-02-07 14:36:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:36:08,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:36:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 340 transitions. [2024-02-07 14:36:08,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7709750566893424 [2024-02-07 14:36:08,616 INFO L175 Difference]: Start difference. First operand has 84 places, 102 transitions, 836 flow. Second operand 7 states and 340 transitions. [2024-02-07 14:36:08,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 256 transitions, 2280 flow [2024-02-07 14:36:08,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 256 transitions, 2264 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:36:08,659 INFO L231 Difference]: Finished difference. Result has 93 places, 153 transitions, 1664 flow [2024-02-07 14:36:08,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1664, PETRI_PLACES=93, PETRI_TRANSITIONS=153} [2024-02-07 14:36:08,660 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 34 predicate places. [2024-02-07 14:36:08,660 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 153 transitions, 1664 flow [2024-02-07 14:36:08,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.57142857142857) internal successors, (242), 7 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:08,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:08,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:08,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:08,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:08,872 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:08,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:08,873 INFO L85 PathProgramCache]: Analyzing trace with hash -565439753, now seen corresponding path program 1 times [2024-02-07 14:36:08,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:08,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230097218] [2024-02-07 14:36:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:08,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 14:36:08,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:08,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230097218] [2024-02-07 14:36:08,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230097218] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:08,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292334631] [2024-02-07 14:36:08,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:08,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:08,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:08,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:08,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 14:36:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:09,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 14:36:09,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 14:36:09,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:36:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-07 14:36:09,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292334631] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:36:09,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:36:09,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2024-02-07 14:36:09,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278009436] [2024-02-07 14:36:09,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:36:09,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:36:09,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:09,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:36:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:36:09,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 14:36:09,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 153 transitions, 1664 flow. Second operand has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:09,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:09,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 14:36:09,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:11,805 INFO L124 PetriNetUnfolderBase]: 9542/23427 cut-off events. [2024-02-07 14:36:11,805 INFO L125 PetriNetUnfolderBase]: For 89742/89878 co-relation queries the response was YES. [2024-02-07 14:36:11,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72218 conditions, 23427 events. 9542/23427 cut-off events. For 89742/89878 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 227637 event pairs, 1426 based on Foata normal form. 775/22817 useless extension candidates. Maximal degree in co-relation 72179. Up to 2976 conditions per place. [2024-02-07 14:36:11,945 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 175 selfloop transitions, 111 changer transitions 0/301 dead transitions. [2024-02-07 14:36:11,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 301 transitions, 3036 flow [2024-02-07 14:36:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:36:11,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:36:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 429 transitions. [2024-02-07 14:36:11,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7566137566137566 [2024-02-07 14:36:11,947 INFO L175 Difference]: Start difference. First operand has 93 places, 153 transitions, 1664 flow. Second operand 9 states and 429 transitions. [2024-02-07 14:36:11,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 301 transitions, 3036 flow [2024-02-07 14:36:12,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 301 transitions, 3018 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-02-07 14:36:12,033 INFO L231 Difference]: Finished difference. Result has 102 places, 176 transitions, 2308 flow [2024-02-07 14:36:12,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2308, PETRI_PLACES=102, PETRI_TRANSITIONS=176} [2024-02-07 14:36:12,035 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 43 predicate places. [2024-02-07 14:36:12,035 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 176 transitions, 2308 flow [2024-02-07 14:36:12,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:12,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:12,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:12,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:12,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-07 14:36:12,251 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:12,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:12,252 INFO L85 PathProgramCache]: Analyzing trace with hash -933435540, now seen corresponding path program 1 times [2024-02-07 14:36:12,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:12,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017019577] [2024-02-07 14:36:12,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:12,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:36:12,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:12,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017019577] [2024-02-07 14:36:12,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017019577] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:12,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272827385] [2024-02-07 14:36:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:12,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:12,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:12,401 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:12,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 14:36:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:12,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:36:12,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:36:12,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:36:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:36:12,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272827385] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:36:12,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:36:12,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-02-07 14:36:12,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295217316] [2024-02-07 14:36:12,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:36:12,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:36:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:36:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:36:12,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 63 [2024-02-07 14:36:12,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 176 transitions, 2308 flow. Second operand has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:12,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:12,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 63 [2024-02-07 14:36:12,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:14,452 INFO L124 PetriNetUnfolderBase]: 8832/21633 cut-off events. [2024-02-07 14:36:14,453 INFO L125 PetriNetUnfolderBase]: For 113407/114443 co-relation queries the response was YES. [2024-02-07 14:36:14,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68609 conditions, 21633 events. 8832/21633 cut-off events. For 113407/114443 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 214292 event pairs, 3212 based on Foata normal form. 662/20859 useless extension candidates. Maximal degree in co-relation 68567. Up to 6167 conditions per place. [2024-02-07 14:36:14,867 INFO L140 encePairwiseOnDemand]: 53/63 looper letters, 68 selfloop transitions, 117 changer transitions 1/201 dead transitions. [2024-02-07 14:36:14,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 201 transitions, 2614 flow [2024-02-07 14:36:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:36:14,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:36:14,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 249 transitions. [2024-02-07 14:36:14,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-02-07 14:36:14,869 INFO L175 Difference]: Start difference. First operand has 102 places, 176 transitions, 2308 flow. Second operand 6 states and 249 transitions. [2024-02-07 14:36:14,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 201 transitions, 2614 flow [2024-02-07 14:36:14,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 201 transitions, 2305 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-02-07 14:36:14,982 INFO L231 Difference]: Finished difference. Result has 96 places, 163 transitions, 2086 flow [2024-02-07 14:36:14,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2086, PETRI_PLACES=96, PETRI_TRANSITIONS=163} [2024-02-07 14:36:14,982 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 37 predicate places. [2024-02-07 14:36:14,982 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 163 transitions, 2086 flow [2024-02-07 14:36:14,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:14,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:14,983 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:15,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:15,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-07 14:36:15,197 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:15,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:15,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2108577219, now seen corresponding path program 2 times [2024-02-07 14:36:15,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:15,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471155175] [2024-02-07 14:36:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:15,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-02-07 14:36:15,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:15,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471155175] [2024-02-07 14:36:15,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471155175] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:15,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:36:15,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:36:15,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365868307] [2024-02-07 14:36:15,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:15,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:36:15,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:15,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:36:15,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:36:15,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-02-07 14:36:15,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 163 transitions, 2086 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:15,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:15,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-02-07 14:36:15,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:17,732 INFO L124 PetriNetUnfolderBase]: 10503/23324 cut-off events. [2024-02-07 14:36:17,732 INFO L125 PetriNetUnfolderBase]: For 98026/98354 co-relation queries the response was YES. [2024-02-07 14:36:17,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74713 conditions, 23324 events. 10503/23324 cut-off events. For 98026/98354 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 220552 event pairs, 6991 based on Foata normal form. 592/22428 useless extension candidates. Maximal degree in co-relation 74676. Up to 14420 conditions per place. [2024-02-07 14:36:17,878 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 182 selfloop transitions, 4 changer transitions 0/200 dead transitions. [2024-02-07 14:36:17,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 200 transitions, 2919 flow [2024-02-07 14:36:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:36:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:36:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-02-07 14:36:17,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.671957671957672 [2024-02-07 14:36:17,879 INFO L175 Difference]: Start difference. First operand has 96 places, 163 transitions, 2086 flow. Second operand 3 states and 127 transitions. [2024-02-07 14:36:17,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 200 transitions, 2919 flow [2024-02-07 14:36:17,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 200 transitions, 2900 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-07 14:36:17,944 INFO L231 Difference]: Finished difference. Result has 98 places, 163 transitions, 2084 flow [2024-02-07 14:36:17,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2084, PETRI_PLACES=98, PETRI_TRANSITIONS=163} [2024-02-07 14:36:17,944 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 39 predicate places. [2024-02-07 14:36:17,945 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 163 transitions, 2084 flow [2024-02-07 14:36:17,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:17,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:17,945 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:17,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-07 14:36:17,945 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 28 more)] === [2024-02-07 14:36:17,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:17,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1692725202, now seen corresponding path program 3 times [2024-02-07 14:36:17,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:17,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406090790] [2024-02-07 14:36:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:17,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-02-07 14:36:17,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:17,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406090790] [2024-02-07 14:36:17,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406090790] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:17,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:36:17,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:36:17,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414721745] [2024-02-07 14:36:17,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:17,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:36:17,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:36:17,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:36:17,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 63 [2024-02-07 14:36:17,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 163 transitions, 2084 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:17,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:17,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 63 [2024-02-07 14:36:17,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:20,380 INFO L124 PetriNetUnfolderBase]: 10364/23419 cut-off events. [2024-02-07 14:36:20,380 INFO L125 PetriNetUnfolderBase]: For 99891/100035 co-relation queries the response was YES. [2024-02-07 14:36:20,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77161 conditions, 23419 events. 10364/23419 cut-off events. For 99891/100035 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 223933 event pairs, 7328 based on Foata normal form. 582/22548 useless extension candidates. Maximal degree in co-relation 77124. Up to 14904 conditions per place. [2024-02-07 14:36:20,474 INFO L140 encePairwiseOnDemand]: 59/63 looper letters, 0 selfloop transitions, 0 changer transitions 193/193 dead transitions. [2024-02-07 14:36:20,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 193 transitions, 2789 flow [2024-02-07 14:36:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:36:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:36:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-02-07 14:36:20,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-02-07 14:36:20,475 INFO L175 Difference]: Start difference. First operand has 98 places, 163 transitions, 2084 flow. Second operand 3 states and 126 transitions. [2024-02-07 14:36:20,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 193 transitions, 2789 flow [2024-02-07 14:36:20,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 193 transitions, 2643 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-02-07 14:36:20,555 INFO L231 Difference]: Finished difference. Result has 94 places, 0 transitions, 0 flow [2024-02-07 14:36:20,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=94, PETRI_TRANSITIONS=0} [2024-02-07 14:36:20,556 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 35 predicate places. [2024-02-07 14:36:20,556 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 0 transitions, 0 flow [2024-02-07 14:36:20,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:20,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (30 of 31 remaining) [2024-02-07 14:36:20,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (29 of 31 remaining) [2024-02-07 14:36:20,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (28 of 31 remaining) [2024-02-07 14:36:20,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (27 of 31 remaining) [2024-02-07 14:36:20,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (26 of 31 remaining) [2024-02-07 14:36:20,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (25 of 31 remaining) [2024-02-07 14:36:20,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (24 of 31 remaining) [2024-02-07 14:36:20,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (23 of 31 remaining) [2024-02-07 14:36:20,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (22 of 31 remaining) [2024-02-07 14:36:20,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (21 of 31 remaining) [2024-02-07 14:36:20,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (20 of 31 remaining) [2024-02-07 14:36:20,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (19 of 31 remaining) [2024-02-07 14:36:20,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (18 of 31 remaining) [2024-02-07 14:36:20,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (17 of 31 remaining) [2024-02-07 14:36:20,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 31 remaining) [2024-02-07 14:36:20,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 31 remaining) [2024-02-07 14:36:20,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (14 of 31 remaining) [2024-02-07 14:36:20,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 31 remaining) [2024-02-07 14:36:20,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 31 remaining) [2024-02-07 14:36:20,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 31 remaining) [2024-02-07 14:36:20,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 31 remaining) [2024-02-07 14:36:20,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 31 remaining) [2024-02-07 14:36:20,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 31 remaining) [2024-02-07 14:36:20,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err4ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 31 remaining) [2024-02-07 14:36:20,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err5ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 31 remaining) [2024-02-07 14:36:20,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 31 remaining) [2024-02-07 14:36:20,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 31 remaining) [2024-02-07 14:36:20,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 31 remaining) [2024-02-07 14:36:20,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err3ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 31 remaining) [2024-02-07 14:36:20,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err4ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 31 remaining) [2024-02-07 14:36:20,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err5ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 31 remaining) [2024-02-07 14:36:20,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-07 14:36:20,565 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:20,569 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 14:36:20,570 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 14:36:20,573 INFO L503 ceAbstractionStarter]: Automizer considered 16 witness invariants [2024-02-07 14:36:20,573 INFO L504 ceAbstractionStarter]: WitnessConsidered=16 [2024-02-07 14:36:20,574 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 02:36:20 BasicIcfg [2024-02-07 14:36:20,574 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 14:36:20,575 INFO L158 Benchmark]: Toolchain (without parser) took 24939.13ms. Allocated memory was 155.2MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 114.4MB in the beginning and 6.9GB in the end (delta: -6.7GB). Peak memory consumption was 1.1GB. Max. memory is 16.1GB. [2024-02-07 14:36:20,575 INFO L158 Benchmark]: Witness Parser took 0.21ms. Allocated memory is still 117.4MB. Free memory was 90.2MB in the beginning and 90.1MB in the end (delta: 77.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:36:20,576 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:36:20,576 INFO L158 Benchmark]: CACSL2BoogieTranslator took 378.06ms. Allocated memory is still 155.2MB. Free memory was 113.9MB in the beginning and 99.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-02-07 14:36:20,576 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.56ms. Allocated memory is still 155.2MB. Free memory was 99.3MB in the beginning and 97.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 14:36:20,576 INFO L158 Benchmark]: Boogie Preprocessor took 76.95ms. Allocated memory is still 155.2MB. Free memory was 97.6MB in the beginning and 95.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 14:36:20,577 INFO L158 Benchmark]: RCFGBuilder took 575.48ms. Allocated memory is still 155.2MB. Free memory was 95.1MB in the beginning and 69.9MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-02-07 14:36:20,577 INFO L158 Benchmark]: TraceAbstraction took 23857.75ms. Allocated memory was 155.2MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 69.4MB in the beginning and 6.9GB in the end (delta: -6.8GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. [2024-02-07 14:36:20,579 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.21ms. Allocated memory is still 117.4MB. Free memory was 90.2MB in the beginning and 90.1MB in the end (delta: 77.7kB). There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory is still 87.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 378.06ms. Allocated memory is still 155.2MB. Free memory was 113.9MB in the beginning and 99.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.56ms. Allocated memory is still 155.2MB. Free memory was 99.3MB in the beginning and 97.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 76.95ms. Allocated memory is still 155.2MB. Free memory was 97.6MB in the beginning and 95.1MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 575.48ms. Allocated memory is still 155.2MB. Free memory was 95.1MB in the beginning and 69.9MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 23857.75ms. Allocated memory was 155.2MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 69.4MB in the beginning and 6.9GB in the end (delta: -6.8GB). Peak memory consumption was 1.0GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 46]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 52]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 53]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 55]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 65]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 68]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 72]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 74]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 75]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 77]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 90]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 91]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 92]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 95]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 101]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 94 locations, 31 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 23.7s, OverallIterations: 18, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 19.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 816 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 734 mSDsluCounter, 26 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 165 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2006 IncrementalHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 165 mSolverCounterUnsat, 26 mSDtfsCounter, 2006 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 378 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2308occurred in iteration=15, InterpolantAutomatonStates: 76, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 613 NumberOfCodeBlocks, 613 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 728 ConstructedInterpolants, 0 QuantifiedInterpolants, 2084 SizeOfPredicates, 0 NumberOfNonLiveVariables, 853 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 28 InterpolantComputations, 14 PerfectInterpolantSequences, 153/274 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-07 14:36:20,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE