./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-more-nonblocking-counter-alt2.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/popl20-more-nonblocking-counter-alt2.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-more-nonblocking-counter-alt2.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 14:40:07,848 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:40:07,907 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:40:07,913 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:40:07,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:40:07,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:40:07,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:40:07,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:40:07,944 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:40:07,947 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:40:07,948 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:40:07,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:40:07,948 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:40:07,949 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:40:07,949 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:40:07,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:40:07,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:40:07,950 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:40:07,950 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:40:07,950 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:40:07,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:40:07,951 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:40:07,951 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:40:07,951 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:40:07,952 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:40:07,952 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:40:07,952 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:40:07,952 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:40:07,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:40:07,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:40:07,954 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:40:07,954 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:40:07,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:40:07,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:40:07,954 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:40:07,955 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:40:07,955 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:40:07,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:40:07,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:40:07,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:40:07,955 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:40:07,956 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:40:07,956 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:40:07,956 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:40:08,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:40:08,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:40:08,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:40:08,206 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:40:08,207 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:40:08,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-02-07 14:40:09,276 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:40:09,477 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:40:09,487 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-02-07 14:40:09,500 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c852593b/9b346bd1534a44b49b8b514d7d94f75c/FLAG24513bf62 [2024-02-07 14:40:09,515 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c852593b/9b346bd1534a44b49b8b514d7d94f75c [2024-02-07 14:40:09,517 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:40:09,517 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:40:09,519 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-more-nonblocking-counter-alt2.wvr.yml/witness.yml [2024-02-07 14:40:09,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:40:09,629 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:40:09,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:40:09,630 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:40:09,634 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:40:09,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:40:09" (1/2) ... [2024-02-07 14:40:09,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3a6bb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:09, skipping insertion in model container [2024-02-07 14:40:09,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:40:09" (1/2) ... [2024-02-07 14:40:09,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@658871cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:40:09, skipping insertion in model container [2024-02-07 14:40:09,637 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:40:09" (2/2) ... [2024-02-07 14:40:09,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3a6bb3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09, skipping insertion in model container [2024-02-07 14:40:09,638 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:40:09" (2/2) ... [2024-02-07 14:40:09,638 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:40:09,659 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:40:09,663 INFO L76 edCorrectnessWitness]: Location invariant before [L68-L68] ((((0LL - (long long )M) + (long long )counter >= 0LL) && ((long long )M + (long long )counter >= 0LL)) && ((0LL - (long long )M) - (long long )counter >= 0LL)) && ((long long )M - (long long )counter >= 0LL) [2024-02-07 14:40:09,663 INFO L76 edCorrectnessWitness]: Location invariant before [L56-L56] (((((((((((i <= 7U || i <= 6U) || i <= 5U) || i <= 4U) || (i <= 3U && i <= 65535U)) || i <= 4294967294U) || (i <= 2U && i <= 255U)) || i <= 11U) || (i <= 1U && (i == 0U || i == 1U))) || i <= 10U) || (0U == i && i == 0U)) || i <= 9U) || i <= 8U [2024-02-07 14:40:09,664 INFO L76 edCorrectnessWitness]: Location invariant before [L54-L54] (((((((((((i <= 8U || i <= 7U) || i <= 6U) || i <= 5U) || i <= 4U) || (i <= 3U && i <= 65535U)) || i <= 4294967294U) || (i <= 2U && i <= 255U)) || i <= 11U) || (i <= 1U && (i == 0U || i == 1U))) || i <= 10U) || (0U == i && i == 0U)) || i <= 9U [2024-02-07 14:40:09,664 INFO L76 edCorrectnessWitness]: Location invariant before [L67-L67] ((((0LL - (long long )M) + (long long )counter >= 0LL) && ((long long )M + (long long )counter >= 0LL)) && ((0LL - (long long )M) - (long long )counter >= 0LL)) && ((long long )M - (long long )counter >= 0LL) [2024-02-07 14:40:09,664 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] (1U <= counter) && (counter != 0U) [2024-02-07 14:40:09,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:40:09,844 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-02-07 14:40:09,849 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:40:09,859 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:40:09,929 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-02-07 14:40:09,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:40:09,947 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:40:09,947 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09 WrapperNode [2024-02-07 14:40:09,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:40:09,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:40:09,950 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:40:09,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:40:09,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:09,975 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,005 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2024-02-07 14:40:10,006 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:40:10,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:40:10,007 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:40:10,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:40:10,033 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,038 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,061 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 14:40:10,062 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,062 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,081 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,092 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,098 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,100 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,104 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:40:10,105 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:40:10,105 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:40:10,105 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:40:10,106 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (1/1) ... [2024-02-07 14:40:10,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:40:10,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:10,131 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 14:40:10,133 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 14:40:10,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:40:10,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:40:10,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:40:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:40:10,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:40:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:40:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:40:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:40:10,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:40:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:40:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:40:10,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:40:10,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:40:10,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:40:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:40:10,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:40:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:40:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:40:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:40:10,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:40:10,164 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 14:40:10,265 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:40:10,266 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:40:10,434 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:40:10,435 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:40:10,539 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:40:10,539 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:40:10,539 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:40:10 BoogieIcfgContainer [2024-02-07 14:40:10,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:40:10,541 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:40:10,541 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:40:10,544 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:40:10,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:40:09" (1/4) ... [2024-02-07 14:40:10,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678c3952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:40:10, skipping insertion in model container [2024-02-07 14:40:10,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:40:09" (2/4) ... [2024-02-07 14:40:10,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678c3952 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:40:10, skipping insertion in model container [2024-02-07 14:40:10,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:40:09" (3/4) ... [2024-02-07 14:40:10,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678c3952 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:40:10, skipping insertion in model container [2024-02-07 14:40:10,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:40:10" (4/4) ... [2024-02-07 14:40:10,547 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-02-07 14:40:10,561 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:40:10,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-02-07 14:40:10,561 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:40:10,608 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:40:10,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 29 transitions, 72 flow [2024-02-07 14:40:10,647 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2024-02-07 14:40:10,648 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:40:10,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 2/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 29 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-02-07 14:40:10,650 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 29 transitions, 72 flow [2024-02-07 14:40:10,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 26 transitions, 64 flow [2024-02-07 14:40:10,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:40:10,674 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;@72232cfc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:40:10,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-02-07 14:40:10,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:40:10,679 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:40:10,679 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:40:10,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:10,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:40:10,681 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:10,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash 8426, now seen corresponding path program 1 times [2024-02-07 14:40:10,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:10,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453581006] [2024-02-07 14:40:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:10,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:10,941 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 14:40:10,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:10,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453581006] [2024-02-07 14:40:10,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453581006] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:10,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:10,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:40:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805509079] [2024-02-07 14:40:10,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:10,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:40:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:40:10,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:40:10,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:40:10,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:11,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:40:11,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:11,087 INFO L124 PetriNetUnfolderBase]: 96/172 cut-off events. [2024-02-07 14:40:11,087 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-07 14:40:11,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 172 events. 96/172 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 464 event pairs, 72 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 300. Up to 170 conditions per place. [2024-02-07 14:40:11,092 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-02-07 14:40:11,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 98 flow [2024-02-07 14:40:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:40:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:40:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2024-02-07 14:40:11,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-02-07 14:40:11,103 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 3 states and 34 transitions. [2024-02-07 14:40:11,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 98 flow [2024-02-07 14:40:11,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:40:11,108 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 52 flow [2024-02-07 14:40:11,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-02-07 14:40:11,112 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2024-02-07 14:40:11,112 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 52 flow [2024-02-07 14:40:11,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:11,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:11,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:40:11,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:11,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:11,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1501593757, now seen corresponding path program 1 times [2024-02-07 14:40:11,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25917258] [2024-02-07 14:40:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:11,235 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 14:40:11,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25917258] [2024-02-07 14:40:11,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25917258] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:11,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:11,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:40:11,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833157039] [2024-02-07 14:40:11,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:11,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:40:11,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:40:11,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:40:11,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-02-07 14:40:11,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:11,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-02-07 14:40:11,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:11,321 INFO L124 PetriNetUnfolderBase]: 73/138 cut-off events. [2024-02-07 14:40:11,321 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-02-07 14:40:11,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 138 events. 73/138 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 330 event pairs, 24 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 270. Up to 68 conditions per place. [2024-02-07 14:40:11,323 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 25 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-02-07 14:40:11,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 128 flow [2024-02-07 14:40:11,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:40:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:40:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-02-07 14:40:11,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-02-07 14:40:11,326 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 52 flow. Second operand 3 states and 50 transitions. [2024-02-07 14:40:11,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 128 flow [2024-02-07 14:40:11,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:40:11,328 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 59 flow [2024-02-07 14:40:11,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-02-07 14:40:11,328 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2024-02-07 14:40:11,329 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 59 flow [2024-02-07 14:40:11,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:11,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:11,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:40:11,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:11,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash 551778278, now seen corresponding path program 1 times [2024-02-07 14:40:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:11,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357165066] [2024-02-07 14:40:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:11,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:11,421 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 14:40:11,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:11,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357165066] [2024-02-07 14:40:11,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357165066] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:11,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:11,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:40:11,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329274051] [2024-02-07 14:40:11,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:11,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:40:11,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:11,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:40:11,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:40:11,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-02-07 14:40:11,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:11,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-02-07 14:40:11,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:11,479 INFO L124 PetriNetUnfolderBase]: 113/235 cut-off events. [2024-02-07 14:40:11,480 INFO L125 PetriNetUnfolderBase]: For 53/63 co-relation queries the response was YES. [2024-02-07 14:40:11,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 235 events. 113/235 cut-off events. For 53/63 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 850 event pairs, 42 based on Foata normal form. 2/236 useless extension candidates. Maximal degree in co-relation 112. Up to 116 conditions per place. [2024-02-07 14:40:11,481 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 3/33 dead transitions. [2024-02-07 14:40:11,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 148 flow [2024-02-07 14:40:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:40:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:40:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-02-07 14:40:11,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-02-07 14:40:11,483 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 59 flow. Second operand 3 states and 51 transitions. [2024-02-07 14:40:11,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 148 flow [2024-02-07 14:40:11,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:40:11,484 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 68 flow [2024-02-07 14:40:11,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2024-02-07 14:40:11,485 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -4 predicate places. [2024-02-07 14:40:11,485 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 68 flow [2024-02-07 14:40:11,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:11,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:11,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:40:11,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:11,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:11,486 INFO L85 PathProgramCache]: Analyzing trace with hash 863029025, now seen corresponding path program 1 times [2024-02-07 14:40:11,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:11,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812237712] [2024-02-07 14:40:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:11,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:11,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:11,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:11,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812237712] [2024-02-07 14:40:11,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812237712] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:40:11,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:40:11,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 14:40:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414384369] [2024-02-07 14:40:11,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:40:11,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:40:11,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:11,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:40:11,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:40:11,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:40:11,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:11,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:40:11,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:11,608 INFO L124 PetriNetUnfolderBase]: 153/284 cut-off events. [2024-02-07 14:40:11,608 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-07 14:40:11,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 284 events. 153/284 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 974 event pairs, 87 based on Foata normal form. 18/273 useless extension candidates. Maximal degree in co-relation 355. Up to 195 conditions per place. [2024-02-07 14:40:11,610 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 25 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-02-07 14:40:11,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 143 flow [2024-02-07 14:40:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:40:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:40:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2024-02-07 14:40:11,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2024-02-07 14:40:11,612 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 68 flow. Second operand 4 states and 53 transitions. [2024-02-07 14:40:11,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 143 flow [2024-02-07 14:40:11,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:40:11,613 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 82 flow [2024-02-07 14:40:11,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-02-07 14:40:11,614 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-02-07 14:40:11,614 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 82 flow [2024-02-07 14:40:11,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:11,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:11,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:40:11,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:11,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash 993093648, now seen corresponding path program 1 times [2024-02-07 14:40:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:11,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271469320] [2024-02-07 14:40:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:11,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:11,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:11,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271469320] [2024-02-07 14:40:11,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271469320] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:11,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551206850] [2024-02-07 14:40:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:11,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:11,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:11,977 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 14:40:12,004 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 14:40:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:12,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:40:12,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:12,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:12,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551206850] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:12,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:12,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 14 [2024-02-07 14:40:12,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997848331] [2024-02-07 14:40:12,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:12,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:40:12,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:12,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:40:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:40:12,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:40:12,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 82 flow. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 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 14:40:12,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:12,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:40:12,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:12,585 INFO L124 PetriNetUnfolderBase]: 459/808 cut-off events. [2024-02-07 14:40:12,585 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2024-02-07 14:40:12,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2205 conditions, 808 events. 459/808 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3486 event pairs, 69 based on Foata normal form. 2/742 useless extension candidates. Maximal degree in co-relation 625. Up to 197 conditions per place. [2024-02-07 14:40:12,590 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 77 selfloop transitions, 18 changer transitions 18/114 dead transitions. [2024-02-07 14:40:12,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 114 transitions, 599 flow [2024-02-07 14:40:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:40:12,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:40:12,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-02-07 14:40:12,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-02-07 14:40:12,591 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 82 flow. Second operand 12 states and 145 transitions. [2024-02-07 14:40:12,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 114 transitions, 599 flow [2024-02-07 14:40:12,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 114 transitions, 589 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:40:12,594 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 225 flow [2024-02-07 14:40:12,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=225, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-02-07 14:40:12,595 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-02-07 14:40:12,595 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 225 flow [2024-02-07 14:40:12,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 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 14:40:12,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:12,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:12,625 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 14:40:12,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:12,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:12,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1153840512, now seen corresponding path program 2 times [2024-02-07 14:40:12,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:12,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146591211] [2024-02-07 14:40:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:12,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:12,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146591211] [2024-02-07 14:40:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146591211] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902547527] [2024-02-07 14:40:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:40:12,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:12,922 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 14:40:12,946 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 14:40:12,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:40:12,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:12,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:40:12,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:13,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:13,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902547527] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:13,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:13,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-02-07 14:40:13,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694278155] [2024-02-07 14:40:13,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:13,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-07 14:40:13,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:13,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-07 14:40:13,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-02-07 14:40:13,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:40:13,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 225 flow. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:13,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:13,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:40:13,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:13,437 INFO L124 PetriNetUnfolderBase]: 487/852 cut-off events. [2024-02-07 14:40:13,437 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-02-07 14:40:13,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2700 conditions, 852 events. 487/852 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3673 event pairs, 65 based on Foata normal form. 30/810 useless extension candidates. Maximal degree in co-relation 2555. Up to 395 conditions per place. [2024-02-07 14:40:13,441 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 58 selfloop transitions, 16 changer transitions 6/81 dead transitions. [2024-02-07 14:40:13,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 553 flow [2024-02-07 14:40:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:40:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:40:13,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-02-07 14:40:13,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-02-07 14:40:13,444 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 225 flow. Second operand 7 states and 77 transitions. [2024-02-07 14:40:13,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 553 flow [2024-02-07 14:40:13,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 81 transitions, 522 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-02-07 14:40:13,451 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 322 flow [2024-02-07 14:40:13,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=322, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-02-07 14:40:13,454 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-02-07 14:40:13,454 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 322 flow [2024-02-07 14:40:13,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 10 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:13,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:13,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:13,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-07 14:40:13,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-02-07 14:40:13,666 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:13,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:13,666 INFO L85 PathProgramCache]: Analyzing trace with hash 988830597, now seen corresponding path program 3 times [2024-02-07 14:40:13,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:13,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572838835] [2024-02-07 14:40:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:13,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:13,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:13,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572838835] [2024-02-07 14:40:13,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572838835] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:13,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57037778] [2024-02-07 14:40:13,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:40:13,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:13,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:13,917 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 14:40:13,918 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 14:40:14,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 14:40:14,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:14,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:40:14,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:14,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:14,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57037778] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:14,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:14,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2024-02-07 14:40:14,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116534645] [2024-02-07 14:40:14,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:14,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:40:14,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:40:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:40:14,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:40:14,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 322 flow. Second operand has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:14,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:14,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:40:14,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:15,132 INFO L124 PetriNetUnfolderBase]: 723/1269 cut-off events. [2024-02-07 14:40:15,133 INFO L125 PetriNetUnfolderBase]: For 2799/2821 co-relation queries the response was YES. [2024-02-07 14:40:15,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4559 conditions, 1269 events. 723/1269 cut-off events. For 2799/2821 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6242 event pairs, 14 based on Foata normal form. 34/1171 useless extension candidates. Maximal degree in co-relation 4448. Up to 275 conditions per place. [2024-02-07 14:40:15,139 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 75 selfloop transitions, 125 changer transitions 42/253 dead transitions. [2024-02-07 14:40:15,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 253 transitions, 2034 flow [2024-02-07 14:40:15,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-07 14:40:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-07 14:40:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 373 transitions. [2024-02-07 14:40:15,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897596656217346 [2024-02-07 14:40:15,141 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 322 flow. Second operand 33 states and 373 transitions. [2024-02-07 14:40:15,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 253 transitions, 2034 flow [2024-02-07 14:40:15,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 253 transitions, 1971 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-02-07 14:40:15,151 INFO L231 Difference]: Finished difference. Result has 84 places, 162 transitions, 1438 flow [2024-02-07 14:40:15,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1438, PETRI_PLACES=84, PETRI_TRANSITIONS=162} [2024-02-07 14:40:15,151 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-02-07 14:40:15,152 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 162 transitions, 1438 flow [2024-02-07 14:40:15,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.3125) internal successors, (133), 16 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:15,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:15,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:15,175 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 14:40:15,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:15,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:15,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:15,365 INFO L85 PathProgramCache]: Analyzing trace with hash -555545731, now seen corresponding path program 4 times [2024-02-07 14:40:15,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:15,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810088117] [2024-02-07 14:40:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:15,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:15,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:15,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810088117] [2024-02-07 14:40:15,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810088117] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:15,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824557152] [2024-02-07 14:40:15,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:40:15,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:15,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:15,616 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 14:40:15,672 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 14:40:15,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:40:15,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:15,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:40:15,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:15,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:15,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824557152] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:15,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:15,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 20 [2024-02-07 14:40:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988973593] [2024-02-07 14:40:15,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:15,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 14:40:15,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 14:40:15,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-02-07 14:40:16,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:40:16,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 162 transitions, 1438 flow. Second operand has 20 states, 20 states have (on average 8.6) internal successors, (172), 20 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:16,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:16,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:40:16,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:16,813 INFO L124 PetriNetUnfolderBase]: 1154/2055 cut-off events. [2024-02-07 14:40:16,813 INFO L125 PetriNetUnfolderBase]: For 5656/5684 co-relation queries the response was YES. [2024-02-07 14:40:16,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8408 conditions, 2055 events. 1154/2055 cut-off events. For 5656/5684 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11249 event pairs, 45 based on Foata normal form. 40/1905 useless extension candidates. Maximal degree in co-relation 8121. Up to 393 conditions per place. [2024-02-07 14:40:16,827 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 161 selfloop transitions, 234 changer transitions 0/406 dead transitions. [2024-02-07 14:40:16,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 406 transitions, 4008 flow [2024-02-07 14:40:16,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-07 14:40:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-07 14:40:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 262 transitions. [2024-02-07 14:40:16,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106583072100313 [2024-02-07 14:40:16,829 INFO L175 Difference]: Start difference. First operand has 84 places, 162 transitions, 1438 flow. Second operand 22 states and 262 transitions. [2024-02-07 14:40:16,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 406 transitions, 4008 flow [2024-02-07 14:40:16,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 406 transitions, 3668 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-02-07 14:40:16,854 INFO L231 Difference]: Finished difference. Result has 108 places, 321 transitions, 3486 flow [2024-02-07 14:40:16,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3486, PETRI_PLACES=108, PETRI_TRANSITIONS=321} [2024-02-07 14:40:16,855 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-02-07 14:40:16,855 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 321 transitions, 3486 flow [2024-02-07 14:40:16,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.6) internal successors, (172), 20 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:16,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:16,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:16,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-07 14:40:17,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:17,083 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:17,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash -865798485, now seen corresponding path program 5 times [2024-02-07 14:40:17,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:17,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394929817] [2024-02-07 14:40:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:17,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:17,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394929817] [2024-02-07 14:40:17,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394929817] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:17,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251105839] [2024-02-07 14:40:17,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:40:17,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:17,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:17,277 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 14:40:17,332 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 14:40:17,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-07 14:40:17,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:17,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:40:17,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:17,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:17,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251105839] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:17,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:17,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 19 [2024-02-07 14:40:17,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632786206] [2024-02-07 14:40:17,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:17,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 14:40:17,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 14:40:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-02-07 14:40:17,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:40:17,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 321 transitions, 3486 flow. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:17,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:17,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:40:17,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:18,943 INFO L124 PetriNetUnfolderBase]: 1650/2809 cut-off events. [2024-02-07 14:40:18,944 INFO L125 PetriNetUnfolderBase]: For 11669/11669 co-relation queries the response was YES. [2024-02-07 14:40:18,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13994 conditions, 2809 events. 1650/2809 cut-off events. For 11669/11669 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15275 event pairs, 24 based on Foata normal form. 50/2859 useless extension candidates. Maximal degree in co-relation 11667. Up to 507 conditions per place. [2024-02-07 14:40:18,996 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 232 selfloop transitions, 341 changer transitions 5/579 dead transitions. [2024-02-07 14:40:18,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 579 transitions, 6681 flow [2024-02-07 14:40:18,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-02-07 14:40:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-02-07 14:40:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 343 transitions. [2024-02-07 14:40:18,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3032714412024757 [2024-02-07 14:40:18,998 INFO L175 Difference]: Start difference. First operand has 108 places, 321 transitions, 3486 flow. Second operand 39 states and 343 transitions. [2024-02-07 14:40:18,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 579 transitions, 6681 flow [2024-02-07 14:40:19,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 579 transitions, 6650 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-02-07 14:40:19,056 INFO L231 Difference]: Finished difference. Result has 167 places, 464 transitions, 6286 flow [2024-02-07 14:40:19,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3455, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6286, PETRI_PLACES=167, PETRI_TRANSITIONS=464} [2024-02-07 14:40:19,057 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 136 predicate places. [2024-02-07 14:40:19,057 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 464 transitions, 6286 flow [2024-02-07 14:40:19,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:19,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:19,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:19,078 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 14:40:19,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:19,269 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:19,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:19,269 INFO L85 PathProgramCache]: Analyzing trace with hash 931767653, now seen corresponding path program 6 times [2024-02-07 14:40:19,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:19,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039168119] [2024-02-07 14:40:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:19,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:19,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039168119] [2024-02-07 14:40:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039168119] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:19,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320764217] [2024-02-07 14:40:19,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:40:19,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:19,481 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 14:40:19,496 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 14:40:19,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-07 14:40:19,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:19,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:40:19,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:19,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:19,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320764217] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:19,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:19,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 19 [2024-02-07 14:40:19,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183833185] [2024-02-07 14:40:19,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:19,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 14:40:19,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:19,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 14:40:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2024-02-07 14:40:19,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:40:19,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 464 transitions, 6286 flow. Second operand has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 19 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:19,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:19,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:40:19,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:21,602 INFO L124 PetriNetUnfolderBase]: 2153/3867 cut-off events. [2024-02-07 14:40:21,603 INFO L125 PetriNetUnfolderBase]: For 31535/31563 co-relation queries the response was YES. [2024-02-07 14:40:21,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24142 conditions, 3867 events. 2153/3867 cut-off events. For 31535/31563 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 24195 event pairs, 50 based on Foata normal form. 38/3901 useless extension candidates. Maximal degree in co-relation 23256. Up to 665 conditions per place. [2024-02-07 14:40:21,642 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 262 selfloop transitions, 564 changer transitions 5/850 dead transitions. [2024-02-07 14:40:21,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 850 transitions, 12400 flow [2024-02-07 14:40:21,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-02-07 14:40:21,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-02-07 14:40:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 477 transitions. [2024-02-07 14:40:21,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40117746005046256 [2024-02-07 14:40:21,644 INFO L175 Difference]: Start difference. First operand has 167 places, 464 transitions, 6286 flow. Second operand 41 states and 477 transitions. [2024-02-07 14:40:21,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 850 transitions, 12400 flow [2024-02-07 14:40:21,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 850 transitions, 12133 flow, removed 130 selfloop flow, removed 3 redundant places. [2024-02-07 14:40:21,999 INFO L231 Difference]: Finished difference. Result has 224 places, 729 transitions, 11964 flow [2024-02-07 14:40:22,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6139, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=11964, PETRI_PLACES=224, PETRI_TRANSITIONS=729} [2024-02-07 14:40:22,000 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 193 predicate places. [2024-02-07 14:40:22,000 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 729 transitions, 11964 flow [2024-02-07 14:40:22,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 19 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:22,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:22,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:22,013 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 14:40:22,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:22,213 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:22,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2007478809, now seen corresponding path program 7 times [2024-02-07 14:40:22,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:22,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823758389] [2024-02-07 14:40:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:22,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:22,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:22,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823758389] [2024-02-07 14:40:22,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823758389] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:22,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471973113] [2024-02-07 14:40:22,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:40:22,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:22,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:40:22,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 14:40:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:22,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:40:22,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:22,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:22,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471973113] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:22,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:22,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 15 [2024-02-07 14:40:22,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61778535] [2024-02-07 14:40:22,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:22,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:40:22,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:22,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:40:22,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:40:22,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:40:22,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 729 transitions, 11964 flow. Second operand has 15 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 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 14:40:22,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:22,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:40:22,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:24,352 INFO L124 PetriNetUnfolderBase]: 2683/4725 cut-off events. [2024-02-07 14:40:24,353 INFO L125 PetriNetUnfolderBase]: For 58487/58549 co-relation queries the response was YES. [2024-02-07 14:40:24,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34896 conditions, 4725 events. 2683/4725 cut-off events. For 58487/58549 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30294 event pairs, 135 based on Foata normal form. 30/4739 useless extension candidates. Maximal degree in co-relation 34766. Up to 951 conditions per place. [2024-02-07 14:40:24,405 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 246 selfloop transitions, 719 changer transitions 3/987 dead transitions. [2024-02-07 14:40:24,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 987 transitions, 18017 flow [2024-02-07 14:40:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-07 14:40:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-07 14:40:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 254 transitions. [2024-02-07 14:40:24,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981191222570533 [2024-02-07 14:40:24,406 INFO L175 Difference]: Start difference. First operand has 224 places, 729 transitions, 11964 flow. Second operand 22 states and 254 transitions. [2024-02-07 14:40:24,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 987 transitions, 18017 flow [2024-02-07 14:40:25,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 987 transitions, 17773 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-02-07 14:40:25,137 INFO L231 Difference]: Finished difference. Result has 251 places, 939 transitions, 18602 flow [2024-02-07 14:40:25,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11587, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=500, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=18602, PETRI_PLACES=251, PETRI_TRANSITIONS=939} [2024-02-07 14:40:25,139 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 220 predicate places. [2024-02-07 14:40:25,139 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 939 transitions, 18602 flow [2024-02-07 14:40:25,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.533333333333333) internal successors, (128), 15 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 14:40:25,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:25,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:25,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 14:40:25,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:25,349 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:25,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:25,349 INFO L85 PathProgramCache]: Analyzing trace with hash 700609565, now seen corresponding path program 8 times [2024-02-07 14:40:25,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:25,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784606923] [2024-02-07 14:40:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:25,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:25,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:25,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784606923] [2024-02-07 14:40:25,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784606923] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:25,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392238088] [2024-02-07 14:40:25,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:40:25,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:25,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:25,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:40:25,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 14:40:25,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:40:25,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:25,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 14:40:25,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:25,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:25,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392238088] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:25,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:25,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-02-07 14:40:25,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855794147] [2024-02-07 14:40:25,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:25,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:40:25,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:40:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:40:25,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:40:25,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 939 transitions, 18602 flow. Second operand has 16 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:25,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:25,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:40:25,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:29,134 INFO L124 PetriNetUnfolderBase]: 4242/7135 cut-off events. [2024-02-07 14:40:29,134 INFO L125 PetriNetUnfolderBase]: For 118532/118532 co-relation queries the response was YES. [2024-02-07 14:40:29,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59674 conditions, 7135 events. 4242/7135 cut-off events. For 118532/118532 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45512 event pairs, 93 based on Foata normal form. 146/7281 useless extension candidates. Maximal degree in co-relation 59519. Up to 1356 conditions per place. [2024-02-07 14:40:29,268 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 425 selfloop transitions, 1212 changer transitions 10/1648 dead transitions. [2024-02-07 14:40:29,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1648 transitions, 34388 flow [2024-02-07 14:40:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-07 14:40:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-07 14:40:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 403 transitions. [2024-02-07 14:40:29,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37558247903075487 [2024-02-07 14:40:29,271 INFO L175 Difference]: Start difference. First operand has 251 places, 939 transitions, 18602 flow. Second operand 37 states and 403 transitions. [2024-02-07 14:40:29,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1648 transitions, 34388 flow [2024-02-07 14:40:31,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 1648 transitions, 34316 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-02-07 14:40:31,134 INFO L231 Difference]: Finished difference. Result has 305 places, 1453 transitions, 33753 flow [2024-02-07 14:40:31,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18507, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=725, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=33753, PETRI_PLACES=305, PETRI_TRANSITIONS=1453} [2024-02-07 14:40:31,135 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 274 predicate places. [2024-02-07 14:40:31,136 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1453 transitions, 33753 flow [2024-02-07 14:40:31,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:31,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:31,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:31,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 14:40:31,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-07 14:40:31,343 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:31,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1041342131, now seen corresponding path program 9 times [2024-02-07 14:40:31,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:31,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448237567] [2024-02-07 14:40:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:31,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:31,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:31,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448237567] [2024-02-07 14:40:31,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448237567] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:31,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151489174] [2024-02-07 14:40:31,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:40:31,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:31,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:31,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:40:31,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 14:40:31,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 14:40:31,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:31,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 14:40:31,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:31,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:32,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151489174] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:32,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:32,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-07 14:40:32,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614324905] [2024-02-07 14:40:32,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:32,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 14:40:32,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 14:40:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:40:32,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:40:32,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1453 transitions, 33753 flow. Second operand has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:32,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:32,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:40:32,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:35,245 INFO L124 PetriNetUnfolderBase]: 4021/7039 cut-off events. [2024-02-07 14:40:35,246 INFO L125 PetriNetUnfolderBase]: For 177809/177833 co-relation queries the response was YES. [2024-02-07 14:40:35,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69952 conditions, 7039 events. 4021/7039 cut-off events. For 177809/177833 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 48018 event pairs, 415 based on Foata normal form. 30/7049 useless extension candidates. Maximal degree in co-relation 69272. Up to 2559 conditions per place. [2024-02-07 14:40:35,347 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 470 selfloop transitions, 1131 changer transitions 5/1638 dead transitions. [2024-02-07 14:40:35,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1638 transitions, 40677 flow [2024-02-07 14:40:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 14:40:35,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 14:40:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 221 transitions. [2024-02-07 14:40:35,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810344827586207 [2024-02-07 14:40:35,349 INFO L175 Difference]: Start difference. First operand has 305 places, 1453 transitions, 33753 flow. Second operand 20 states and 221 transitions. [2024-02-07 14:40:35,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1638 transitions, 40677 flow [2024-02-07 14:40:38,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 1638 transitions, 40479 flow, removed 99 selfloop flow, removed 0 redundant places. [2024-02-07 14:40:38,148 INFO L231 Difference]: Finished difference. Result has 332 places, 1593 transitions, 41442 flow [2024-02-07 14:40:38,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=33503, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=988, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=41442, PETRI_PLACES=332, PETRI_TRANSITIONS=1593} [2024-02-07 14:40:38,150 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 301 predicate places. [2024-02-07 14:40:38,150 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1593 transitions, 41442 flow [2024-02-07 14:40:38,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.277777777777779) internal successors, (149), 18 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:38,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:38,150 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:38,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 14:40:38,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-07 14:40:38,365 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:38,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash -382383531, now seen corresponding path program 10 times [2024-02-07 14:40:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:38,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925934437] [2024-02-07 14:40:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:38,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:38,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925934437] [2024-02-07 14:40:38,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925934437] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891005578] [2024-02-07 14:40:38,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:40:38,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:38,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:38,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:40:38,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-07 14:40:38,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:40:38,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:38,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:40:38,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:38,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:38,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891005578] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:38,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:38,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 19 [2024-02-07 14:40:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921387261] [2024-02-07 14:40:38,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:38,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 14:40:38,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 14:40:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2024-02-07 14:40:38,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:40:38,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1593 transitions, 41442 flow. Second operand has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:38,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:38,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:40:38,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:43,223 INFO L124 PetriNetUnfolderBase]: 4472/7819 cut-off events. [2024-02-07 14:40:43,223 INFO L125 PetriNetUnfolderBase]: For 244055/244103 co-relation queries the response was YES. [2024-02-07 14:40:43,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85509 conditions, 7819 events. 4472/7819 cut-off events. For 244055/244103 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 54204 event pairs, 281 based on Foata normal form. 62/7865 useless extension candidates. Maximal degree in co-relation 85284. Up to 1673 conditions per place. [2024-02-07 14:40:43,329 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 439 selfloop transitions, 1420 changer transitions 2/1893 dead transitions. [2024-02-07 14:40:43,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1893 transitions, 51939 flow [2024-02-07 14:40:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-07 14:40:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-07 14:40:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 329 transitions. [2024-02-07 14:40:43,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-02-07 14:40:43,331 INFO L175 Difference]: Start difference. First operand has 332 places, 1593 transitions, 41442 flow. Second operand 28 states and 329 transitions. [2024-02-07 14:40:43,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1893 transitions, 51939 flow [2024-02-07 14:40:47,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1893 transitions, 51767 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-02-07 14:40:47,209 INFO L231 Difference]: Finished difference. Result has 356 places, 1811 transitions, 52615 flow [2024-02-07 14:40:47,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=41093, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=52615, PETRI_PLACES=356, PETRI_TRANSITIONS=1811} [2024-02-07 14:40:47,211 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 325 predicate places. [2024-02-07 14:40:47,211 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1811 transitions, 52615 flow [2024-02-07 14:40:47,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.263157894736842) internal successors, (157), 19 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:47,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:47,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:47,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-07 14:40:47,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-07 14:40:47,423 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:47,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash -909647139, now seen corresponding path program 11 times [2024-02-07 14:40:47,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:47,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767057042] [2024-02-07 14:40:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767057042] [2024-02-07 14:40:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767057042] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883141225] [2024-02-07 14:40:47,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:40:47,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:47,559 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:40:47,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-07 14:40:47,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-07 14:40:47,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:47,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 14:40:47,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:47,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:47,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883141225] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:47,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:47,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2024-02-07 14:40:47,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943773121] [2024-02-07 14:40:47,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:47,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 14:40:47,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 14:40:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-02-07 14:40:47,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:40:47,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 1811 transitions, 52615 flow. Second operand has 17 states, 17 states have (on average 8.058823529411764) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:47,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:47,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:40:47,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:40:53,206 INFO L124 PetriNetUnfolderBase]: 4824/8383 cut-off events. [2024-02-07 14:40:53,206 INFO L125 PetriNetUnfolderBase]: For 309793/309811 co-relation queries the response was YES. [2024-02-07 14:40:53,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100742 conditions, 8383 events. 4824/8383 cut-off events. For 309793/309811 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 58510 event pairs, 214 based on Foata normal form. 34/8395 useless extension candidates. Maximal degree in co-relation 99997. Up to 1643 conditions per place. [2024-02-07 14:40:53,325 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 238 selfloop transitions, 1786 changer transitions 3/2059 dead transitions. [2024-02-07 14:40:53,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 2059 transitions, 62274 flow [2024-02-07 14:40:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-07 14:40:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-07 14:40:53,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 373 transitions. [2024-02-07 14:40:53,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367487684729064 [2024-02-07 14:40:53,327 INFO L175 Difference]: Start difference. First operand has 356 places, 1811 transitions, 52615 flow. Second operand 35 states and 373 transitions. [2024-02-07 14:40:53,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 2059 transitions, 62274 flow [2024-02-07 14:40:58,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 2059 transitions, 61004 flow, removed 106 selfloop flow, removed 9 redundant places. [2024-02-07 14:40:58,469 INFO L231 Difference]: Finished difference. Result has 388 places, 2003 transitions, 62270 flow [2024-02-07 14:40:58,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=51188, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=62270, PETRI_PLACES=388, PETRI_TRANSITIONS=2003} [2024-02-07 14:40:58,471 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 357 predicate places. [2024-02-07 14:40:58,471 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 2003 transitions, 62270 flow [2024-02-07 14:40:58,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.058823529411764) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:58,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:40:58,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:40:58,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-07 14:40:58,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-07 14:40:58,682 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:40:58,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:40:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash 422583267, now seen corresponding path program 12 times [2024-02-07 14:40:58,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:40:58,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586952041] [2024-02-07 14:40:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:40:58,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:40:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:40:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:58,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:40:58,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586952041] [2024-02-07 14:40:58,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586952041] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:40:58,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175653093] [2024-02-07 14:40:58,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:40:58,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:40:58,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:40:58,849 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:40:58,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-07 14:40:58,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 14:40:58,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:40:58,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:40:58,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:40:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:59,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:40:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:40:59,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175653093] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:40:59,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:40:59,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 20 [2024-02-07 14:40:59,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337989251] [2024-02-07 14:40:59,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:40:59,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 14:40:59,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:40:59,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 14:40:59,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-02-07 14:40:59,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:40:59,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 2003 transitions, 62270 flow. Second operand has 20 states, 20 states have (on average 8.6) internal successors, (172), 20 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:40:59,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:40:59,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:40:59,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:04,748 INFO L124 PetriNetUnfolderBase]: 5420/9457 cut-off events. [2024-02-07 14:41:04,749 INFO L125 PetriNetUnfolderBase]: For 393151/393186 co-relation queries the response was YES. [2024-02-07 14:41:04,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120714 conditions, 9457 events. 5420/9457 cut-off events. For 393151/393186 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 67314 event pairs, 630 based on Foata normal form. 76/9508 useless extension candidates. Maximal degree in co-relation 119776. Up to 3503 conditions per place. [2024-02-07 14:41:04,915 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 1147 selfloop transitions, 1161 changer transitions 0/2340 dead transitions. [2024-02-07 14:41:04,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 2340 transitions, 76104 flow [2024-02-07 14:41:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-07 14:41:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-07 14:41:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 315 transitions. [2024-02-07 14:41:04,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2024-02-07 14:41:04,917 INFO L175 Difference]: Start difference. First operand has 388 places, 2003 transitions, 62270 flow. Second operand 28 states and 315 transitions. [2024-02-07 14:41:04,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 2340 transitions, 76104 flow [2024-02-07 14:41:14,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 2340 transitions, 75027 flow, removed 276 selfloop flow, removed 15 redundant places. [2024-02-07 14:41:14,555 INFO L231 Difference]: Finished difference. Result has 417 places, 2201 transitions, 72367 flow [2024-02-07 14:41:14,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=61428, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=72367, PETRI_PLACES=417, PETRI_TRANSITIONS=2201} [2024-02-07 14:41:14,557 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 386 predicate places. [2024-02-07 14:41:14,557 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 2201 transitions, 72367 flow [2024-02-07 14:41:14,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.6) internal successors, (172), 20 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:14,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:14,557 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:14,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:14,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-07 14:41:14,768 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:41:14,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash -929999177, now seen corresponding path program 13 times [2024-02-07 14:41:14,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:14,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526389943] [2024-02-07 14:41:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:14,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:14,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:14,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526389943] [2024-02-07 14:41:14,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526389943] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689344944] [2024-02-07 14:41:14,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:41:14,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:14,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:14,920 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:41:14,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-07 14:41:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:14,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:41:14,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:15,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:15,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689344944] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:15,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:15,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2024-02-07 14:41:15,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090700380] [2024-02-07 14:41:15,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:15,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 14:41:15,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 14:41:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:41:15,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:41:15,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 2201 transitions, 72367 flow. Second operand has 18 states, 18 states have (on average 8.38888888888889) internal successors, (151), 18 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:15,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:15,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:41:15,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:22,947 INFO L124 PetriNetUnfolderBase]: 5421/9460 cut-off events. [2024-02-07 14:41:22,947 INFO L125 PetriNetUnfolderBase]: For 428434/428457 co-relation queries the response was YES. [2024-02-07 14:41:23,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126249 conditions, 9460 events. 5421/9460 cut-off events. For 428434/428457 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 67319 event pairs, 686 based on Foata normal form. 26/9465 useless extension candidates. Maximal degree in co-relation 125686. Up to 4091 conditions per place. [2024-02-07 14:41:23,119 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 769 selfloop transitions, 1514 changer transitions 3/2318 dead transitions. [2024-02-07 14:41:23,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 2318 transitions, 79416 flow [2024-02-07 14:41:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 14:41:23,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 14:41:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 280 transitions. [2024-02-07 14:41:23,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3713527851458886 [2024-02-07 14:41:23,122 INFO L175 Difference]: Start difference. First operand has 417 places, 2201 transitions, 72367 flow. Second operand 26 states and 280 transitions. [2024-02-07 14:41:23,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 2318 transitions, 79416 flow [2024-02-07 14:41:31,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 2318 transitions, 78771 flow, removed 230 selfloop flow, removed 5 redundant places. [2024-02-07 14:41:31,662 INFO L231 Difference]: Finished difference. Result has 442 places, 2262 transitions, 78597 flow [2024-02-07 14:41:31,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=71597, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=78597, PETRI_PLACES=442, PETRI_TRANSITIONS=2262} [2024-02-07 14:41:31,669 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 411 predicate places. [2024-02-07 14:41:31,670 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 2262 transitions, 78597 flow [2024-02-07 14:41:31,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.38888888888889) internal successors, (151), 18 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:31,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:31,670 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:31,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:31,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 14:41:31,880 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:41:31,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:31,881 INFO L85 PathProgramCache]: Analyzing trace with hash -659959471, now seen corresponding path program 14 times [2024-02-07 14:41:31,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:31,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854833601] [2024-02-07 14:41:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:31,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:32,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854833601] [2024-02-07 14:41:32,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854833601] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787906151] [2024-02-07 14:41:32,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:41:32,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:32,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:32,030 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:41:32,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-07 14:41:32,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:41:32,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:41:32,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:41:32,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:32,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:32,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787906151] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:32,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:32,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2024-02-07 14:41:32,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626488700] [2024-02-07 14:41:32,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:32,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 14:41:32,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:32,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 14:41:32,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-02-07 14:41:32,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 14:41:32,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 2262 transitions, 78597 flow. Second operand has 16 states, 16 states have (on average 8.4375) internal successors, (135), 16 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:32,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:32,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 14:41:32,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:41:38,847 INFO L124 PetriNetUnfolderBase]: 5490/9553 cut-off events. [2024-02-07 14:41:38,847 INFO L125 PetriNetUnfolderBase]: For 481352/481371 co-relation queries the response was YES. [2024-02-07 14:41:38,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134582 conditions, 9553 events. 5490/9553 cut-off events. For 481352/481371 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 67713 event pairs, 986 based on Foata normal form. 16/9548 useless extension candidates. Maximal degree in co-relation 134441. Up to 5295 conditions per place. [2024-02-07 14:41:39,007 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 1193 selfloop transitions, 1086 changer transitions 4/2315 dead transitions. [2024-02-07 14:41:39,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 2315 transitions, 84408 flow [2024-02-07 14:41:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:41:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:41:39,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 153 transitions. [2024-02-07 14:41:39,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3768472906403941 [2024-02-07 14:41:39,009 INFO L175 Difference]: Start difference. First operand has 442 places, 2262 transitions, 78597 flow. Second operand 14 states and 153 transitions. [2024-02-07 14:41:39,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 2315 transitions, 84408 flow [2024-02-07 14:41:48,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 2315 transitions, 84019 flow, removed 113 selfloop flow, removed 14 redundant places. [2024-02-07 14:41:48,460 INFO L231 Difference]: Finished difference. Result has 438 places, 2285 transitions, 83403 flow [2024-02-07 14:41:48,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=78000, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=83403, PETRI_PLACES=438, PETRI_TRANSITIONS=2285} [2024-02-07 14:41:48,462 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 407 predicate places. [2024-02-07 14:41:48,462 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 2285 transitions, 83403 flow [2024-02-07 14:41:48,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 16 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:48,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:41:48,463 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:41:48,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-07 14:41:48,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:48,669 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:41:48,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:41:48,670 INFO L85 PathProgramCache]: Analyzing trace with hash 537352906, now seen corresponding path program 15 times [2024-02-07 14:41:48,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:41:48,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692227386] [2024-02-07 14:41:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:41:48,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:41:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:41:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:48,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:41:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692227386] [2024-02-07 14:41:48,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692227386] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:41:48,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391553906] [2024-02-07 14:41:48,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:41:48,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:41:48,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:41:48,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:41:48,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-07 14:41:49,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 14:41:49,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:41:49,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-07 14:41:49,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:41:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:49,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:41:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:41:49,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391553906] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:41:49,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:41:49,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 25 [2024-02-07 14:41:49,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247706142] [2024-02-07 14:41:49,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:41:49,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 14:41:49,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:41:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 14:41:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2024-02-07 14:41:49,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:41:49,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 2285 transitions, 83403 flow. Second operand has 25 states, 25 states have (on average 5.84) internal successors, (146), 25 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:41:49,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:41:49,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:41:49,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:42:00,685 INFO L124 PetriNetUnfolderBase]: 6971/11693 cut-off events. [2024-02-07 14:42:00,685 INFO L125 PetriNetUnfolderBase]: For 659119/659119 co-relation queries the response was YES. [2024-02-07 14:42:00,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168814 conditions, 11693 events. 6971/11693 cut-off events. For 659119/659119 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 81504 event pairs, 116 based on Foata normal form. 104/11797 useless extension candidates. Maximal degree in co-relation 168670. Up to 5043 conditions per place. [2024-02-07 14:42:00,886 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 1506 selfloop transitions, 1360 changer transitions 39/2906 dead transitions. [2024-02-07 14:42:00,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 2906 transitions, 108462 flow [2024-02-07 14:42:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-02-07 14:42:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-02-07 14:42:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 467 transitions. [2024-02-07 14:42:00,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27293980128579776 [2024-02-07 14:42:00,889 INFO L175 Difference]: Start difference. First operand has 438 places, 2285 transitions, 83403 flow. Second operand 59 states and 467 transitions. [2024-02-07 14:42:00,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 2906 transitions, 108462 flow [2024-02-07 14:42:13,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 2906 transitions, 108376 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-02-07 14:42:14,019 INFO L231 Difference]: Finished difference. Result has 514 places, 2621 transitions, 101854 flow [2024-02-07 14:42:14,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=83234, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=101854, PETRI_PLACES=514, PETRI_TRANSITIONS=2621} [2024-02-07 14:42:14,022 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 483 predicate places. [2024-02-07 14:42:14,022 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 2621 transitions, 101854 flow [2024-02-07 14:42:14,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.84) internal successors, (146), 25 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:42:14,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:14,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:42:14,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-02-07 14:42:14,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:42:14,232 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:42:14,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1110424500, now seen corresponding path program 16 times [2024-02-07 14:42:14,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:14,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257952901] [2024-02-07 14:42:14,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:14,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:42:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:42:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:14,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:42:14,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257952901] [2024-02-07 14:42:14,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257952901] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:42:14,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124537433] [2024-02-07 14:42:14,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:42:14,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:42:14,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:14,718 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:42:14,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-07 14:42:14,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:42:14,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:42:14,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-07 14:42:14,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:42:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:42:20,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:42:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:42:37,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124537433] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:42:37,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:42:37,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 7] total 25 [2024-02-07 14:42:37,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359314407] [2024-02-07 14:42:37,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:42:37,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 14:42:37,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:42:37,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 14:42:37,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=462, Unknown=3, NotChecked=0, Total=600 [2024-02-07 14:42:41,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:46,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:50,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:42:50,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:42:50,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 2621 transitions, 101854 flow. Second operand has 25 states, 25 states have (on average 5.8) internal successors, (145), 25 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:42:50,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:42:50,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:42:50,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:03,171 WARN L293 SmtUtils]: Spent 11.07s on a formula simplification. DAG size of input: 39 DAG size of output: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 14:43:19,772 INFO L124 PetriNetUnfolderBase]: 10040/17126 cut-off events. [2024-02-07 14:43:19,772 INFO L125 PetriNetUnfolderBase]: For 1105447/1105447 co-relation queries the response was YES. [2024-02-07 14:43:20,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263863 conditions, 17126 events. 10040/17126 cut-off events. For 1105447/1105447 co-relation queries the response was YES. Maximal size of possible extension queue 849. Compared 128796 event pairs, 88 based on Foata normal form. 12/17138 useless extension candidates. Maximal degree in co-relation 263692. Up to 4730 conditions per place. [2024-02-07 14:43:20,155 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 2200 selfloop transitions, 1738 changer transitions 305/4244 dead transitions. [2024-02-07 14:43:20,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 4244 transitions, 171828 flow [2024-02-07 14:43:20,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-07 14:43:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-07 14:43:20,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 295 transitions. [2024-02-07 14:43:20,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507728894173603 [2024-02-07 14:43:20,157 INFO L175 Difference]: Start difference. First operand has 514 places, 2621 transitions, 101854 flow. Second operand 29 states and 295 transitions. [2024-02-07 14:43:20,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 4244 transitions, 171828 flow [2024-02-07 14:43:49,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 4244 transitions, 171036 flow, removed 278 selfloop flow, removed 15 redundant places. [2024-02-07 14:43:49,643 INFO L231 Difference]: Finished difference. Result has 541 places, 3314 transitions, 140305 flow [2024-02-07 14:43:49,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=101254, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=140305, PETRI_PLACES=541, PETRI_TRANSITIONS=3314} [2024-02-07 14:43:49,645 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 510 predicate places. [2024-02-07 14:43:49,645 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 3314 transitions, 140305 flow [2024-02-07 14:43:49,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.8) internal successors, (145), 25 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:49,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:49,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:49,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-07 14:43:49,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:49,857 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:43:49,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash 52099676, now seen corresponding path program 17 times [2024-02-07 14:43:49,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:49,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955020261] [2024-02-07 14:43:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:49,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:50,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:50,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955020261] [2024-02-07 14:43:50,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955020261] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:43:50,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797253735] [2024-02-07 14:43:50,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:43:50,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:43:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:43:50,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:43:50,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-07 14:43:50,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-07 14:43:50,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:43:50,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:43:50,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:43:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:50,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:43:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:50,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797253735] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:43:50,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:43:50,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-02-07 14:43:50,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937101901] [2024-02-07 14:43:50,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:43:50,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-07 14:43:50,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-07 14:43:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-02-07 14:43:50,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:43:50,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 3314 transitions, 140305 flow. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:43:50,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:50,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:43:50,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:44:13,647 INFO L124 PetriNetUnfolderBase]: 10837/18667 cut-off events. [2024-02-07 14:44:13,648 INFO L125 PetriNetUnfolderBase]: For 1391094/1391094 co-relation queries the response was YES. [2024-02-07 14:44:13,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301748 conditions, 18667 events. 10837/18667 cut-off events. For 1391094/1391094 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 143929 event pairs, 126 based on Foata normal form. 120/18787 useless extension candidates. Maximal degree in co-relation 301564. Up to 7797 conditions per place. [2024-02-07 14:44:14,027 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 1836 selfloop transitions, 2300 changer transitions 18/4155 dead transitions. [2024-02-07 14:44:14,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 4155 transitions, 181160 flow [2024-02-07 14:44:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-07 14:44:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-07 14:44:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 370 transitions. [2024-02-07 14:44:14,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26580459770114945 [2024-02-07 14:44:14,030 INFO L175 Difference]: Start difference. First operand has 541 places, 3314 transitions, 140305 flow. Second operand 48 states and 370 transitions. [2024-02-07 14:44:14,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 4155 transitions, 181160 flow [2024-02-07 14:44:53,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 4155 transitions, 179135 flow, removed 656 selfloop flow, removed 11 redundant places. [2024-02-07 14:44:53,309 INFO L231 Difference]: Finished difference. Result has 604 places, 3814 transitions, 171129 flow [2024-02-07 14:44:53,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=138575, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1822, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=171129, PETRI_PLACES=604, PETRI_TRANSITIONS=3814} [2024-02-07 14:44:53,313 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 573 predicate places. [2024-02-07 14:44:53,313 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 3814 transitions, 171129 flow [2024-02-07 14:44:53,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:44:53,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:44:53,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:44:53,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-02-07 14:44:53,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:44:53,529 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:44:53,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:44:53,529 INFO L85 PathProgramCache]: Analyzing trace with hash 530474174, now seen corresponding path program 18 times [2024-02-07 14:44:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:44:53,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769389578] [2024-02-07 14:44:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:44:53,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:44:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:44:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:53,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:44:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769389578] [2024-02-07 14:44:53,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769389578] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:44:53,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287254690] [2024-02-07 14:44:53,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:44:53,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:44:53,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:44:53,721 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:44:53,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-07 14:44:53,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-07 14:44:53,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:44:53,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:44:53,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:44:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:53,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:44:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:44:54,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287254690] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:44:54,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:44:54,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2024-02-07 14:44:54,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773276854] [2024-02-07 14:44:54,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:44:54,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 14:44:54,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:44:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 14:44:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2024-02-07 14:44:54,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:44:54,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 3814 transitions, 171129 flow. Second operand has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:44:54,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:44:54,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:44:54,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:45:24,871 INFO L124 PetriNetUnfolderBase]: 12202/20814 cut-off events. [2024-02-07 14:45:24,872 INFO L125 PetriNetUnfolderBase]: For 1657176/1657176 co-relation queries the response was YES. [2024-02-07 14:45:25,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349937 conditions, 20814 events. 12202/20814 cut-off events. For 1657176/1657176 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 160925 event pairs, 100 based on Foata normal form. 26/20840 useless extension candidates. Maximal degree in co-relation 349730. Up to 12107 conditions per place. [2024-02-07 14:45:25,382 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 2114 selfloop transitions, 2392 changer transitions 12/4519 dead transitions. [2024-02-07 14:45:25,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 4519 transitions, 208522 flow [2024-02-07 14:45:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-07 14:45:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-07 14:45:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 256 transitions. [2024-02-07 14:45:25,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2942528735632184 [2024-02-07 14:45:25,384 INFO L175 Difference]: Start difference. First operand has 604 places, 3814 transitions, 171129 flow. Second operand 30 states and 256 transitions. [2024-02-07 14:45:25,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 4519 transitions, 208522 flow [2024-02-07 14:46:16,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 4519 transitions, 207148 flow, removed 459 selfloop flow, removed 15 redundant places. [2024-02-07 14:46:16,770 INFO L231 Difference]: Finished difference. Result has 638 places, 4332 transitions, 204262 flow [2024-02-07 14:46:16,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=169679, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3804, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1873, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=204262, PETRI_PLACES=638, PETRI_TRANSITIONS=4332} [2024-02-07 14:46:16,772 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 607 predicate places. [2024-02-07 14:46:16,772 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 4332 transitions, 204262 flow [2024-02-07 14:46:16,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.521739130434782) internal successors, (127), 23 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:46:16,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:46:16,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:46:16,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-07 14:46:16,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:46:16,984 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:46:16,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:46:16,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1127810832, now seen corresponding path program 19 times [2024-02-07 14:46:16,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:46:16,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718982179] [2024-02-07 14:46:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:46:16,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:46:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:46:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:46:17,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:46:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718982179] [2024-02-07 14:46:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718982179] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:46:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485656305] [2024-02-07 14:46:17,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:46:17,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:46:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:46:17,178 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:46:17,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-07 14:46:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:46:17,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-07 14:46:17,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:46:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:46:17,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:46:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:46:17,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485656305] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:46:17,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:46:17,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2024-02-07 14:46:17,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231288125] [2024-02-07 14:46:17,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:46:17,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 14:46:17,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:46:17,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 14:46:17,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2024-02-07 14:46:17,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:46:17,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 4332 transitions, 204262 flow. Second operand has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:46:17,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:46:17,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:46:17,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:46:59,512 INFO L124 PetriNetUnfolderBase]: 12464/21252 cut-off events. [2024-02-07 14:46:59,513 INFO L125 PetriNetUnfolderBase]: For 1885328/1885328 co-relation queries the response was YES. [2024-02-07 14:46:59,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372971 conditions, 21252 events. 12464/21252 cut-off events. For 1885328/1885328 co-relation queries the response was YES. Maximal size of possible extension queue 1036. Compared 164533 event pairs, 116 based on Foata normal form. 18/21270 useless extension candidates. Maximal degree in co-relation 372747. Up to 10700 conditions per place. [2024-02-07 14:47:00,063 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 1346 selfloop transitions, 3239 changer transitions 7/4593 dead transitions. [2024-02-07 14:47:00,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 4593 transitions, 221655 flow [2024-02-07 14:47:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-07 14:47:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-07 14:47:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 247 transitions. [2024-02-07 14:47:00,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2661637931034483 [2024-02-07 14:47:00,081 INFO L175 Difference]: Start difference. First operand has 638 places, 4332 transitions, 204262 flow. Second operand 32 states and 247 transitions. [2024-02-07 14:47:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 4593 transitions, 221655 flow [2024-02-07 14:47:57,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 659 places, 4593 transitions, 221065 flow, removed 228 selfloop flow, removed 8 redundant places. [2024-02-07 14:47:58,067 INFO L231 Difference]: Finished difference. Result has 673 places, 4483 transitions, 222908 flow [2024-02-07 14:47:58,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=203634, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3087, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=222908, PETRI_PLACES=673, PETRI_TRANSITIONS=4483} [2024-02-07 14:47:58,087 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 642 predicate places. [2024-02-07 14:47:58,087 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 4483 transitions, 222908 flow [2024-02-07 14:47:58,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 25 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:47:58,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:47:58,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:47:58,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-02-07 14:47:58,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:47:58,288 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:47:58,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:47:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash 621464566, now seen corresponding path program 20 times [2024-02-07 14:47:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:47:58,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878961165] [2024-02-07 14:47:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:47:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:47:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:47:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:47:58,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:47:58,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878961165] [2024-02-07 14:47:58,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878961165] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:47:58,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582086163] [2024-02-07 14:47:58,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:47:58,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:47:58,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:47:58,479 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:47:58,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-07 14:47:58,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:47:58,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:47:58,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:47:58,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:47:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:47:58,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:47:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:47:59,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582086163] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:47:59,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:47:59,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2024-02-07 14:47:59,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930219068] [2024-02-07 14:47:59,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:47:59,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-07 14:47:59,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:47:59,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-07 14:47:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-02-07 14:47:59,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:47:59,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 4483 transitions, 222908 flow. Second operand has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:47:59,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:47:59,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:47:59,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:48:43,779 INFO L124 PetriNetUnfolderBase]: 12455/21206 cut-off events. [2024-02-07 14:48:43,779 INFO L125 PetriNetUnfolderBase]: For 2099982/2099982 co-relation queries the response was YES. [2024-02-07 14:48:44,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391870 conditions, 21206 events. 12455/21206 cut-off events. For 2099982/2099982 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 163860 event pairs, 108 based on Foata normal form. 6/21212 useless extension candidates. Maximal degree in co-relation 391634. Up to 15027 conditions per place. [2024-02-07 14:48:44,540 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 2356 selfloop transitions, 2188 changer transitions 13/4558 dead transitions. [2024-02-07 14:48:44,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 4558 transitions, 233281 flow [2024-02-07 14:48:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 14:48:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 14:48:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 156 transitions. [2024-02-07 14:48:44,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2689655172413793 [2024-02-07 14:48:44,541 INFO L175 Difference]: Start difference. First operand has 673 places, 4483 transitions, 222908 flow. Second operand 20 states and 156 transitions. [2024-02-07 14:48:44,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 4558 transitions, 233281 flow [2024-02-07 14:49:48,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 4558 transitions, 232613 flow, removed 217 selfloop flow, removed 15 redundant places. [2024-02-07 14:49:48,495 INFO L231 Difference]: Finished difference. Result has 677 places, 4480 transitions, 228938 flow [2024-02-07 14:49:48,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=222000, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=228938, PETRI_PLACES=677, PETRI_TRANSITIONS=4480} [2024-02-07 14:49:48,499 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 646 predicate places. [2024-02-07 14:49:48,499 INFO L495 AbstractCegarLoop]: Abstraction has has 677 places, 4480 transitions, 228938 flow [2024-02-07 14:49:48,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.458333333333333) internal successors, (131), 24 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:49:48,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:49:48,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:49:48,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-07 14:49:48,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-02-07 14:49:48,710 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:49:48,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:49:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash 852069162, now seen corresponding path program 21 times [2024-02-07 14:49:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:49:48,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020439219] [2024-02-07 14:49:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:49:48,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:49:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:49:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:49:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:49:48,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020439219] [2024-02-07 14:49:48,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020439219] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:49:48,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058048873] [2024-02-07 14:49:48,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:49:48,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:49:48,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:49:48,877 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:49:48,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-07 14:49:48,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 14:49:48,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:49:48,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:49:48,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:49:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:49:49,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:49:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:49:49,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058048873] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:49:49,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:49:49,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-02-07 14:49:49,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064023302] [2024-02-07 14:49:49,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:49:49,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 14:49:49,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:49:49,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 14:49:49,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:49:49,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:49:49,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 677 places, 4480 transitions, 228938 flow. Second operand has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:49:49,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:49:49,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:49:49,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:50:05,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:50:09,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:51:01,497 INFO L124 PetriNetUnfolderBase]: 16039/27348 cut-off events. [2024-02-07 14:51:01,497 INFO L125 PetriNetUnfolderBase]: For 3008234/3008234 co-relation queries the response was YES. [2024-02-07 14:51:02,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524043 conditions, 27348 events. 16039/27348 cut-off events. For 3008234/3008234 co-relation queries the response was YES. Maximal size of possible extension queue 1327. Compared 220222 event pairs, 210 based on Foata normal form. 174/27522 useless extension candidates. Maximal degree in co-relation 523808. Up to 11429 conditions per place. [2024-02-07 14:51:03,128 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 2483 selfloop transitions, 3641 changer transitions 57/6182 dead transitions. [2024-02-07 14:51:03,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 6182 transitions, 326303 flow [2024-02-07 14:51:03,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-02-07 14:51:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-02-07 14:51:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 422 transitions. [2024-02-07 14:51:03,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30961115187087307 [2024-02-07 14:51:03,131 INFO L175 Difference]: Start difference. First operand has 677 places, 4480 transitions, 228938 flow. Second operand 47 states and 422 transitions. [2024-02-07 14:51:03,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 6182 transitions, 326303 flow [2024-02-07 14:53:01,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 6182 transitions, 326083 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-02-07 14:53:01,768 INFO L231 Difference]: Finished difference. Result has 736 places, 5667 transitions, 308752 flow [2024-02-07 14:53:01,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=228720, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=308752, PETRI_PLACES=736, PETRI_TRANSITIONS=5667} [2024-02-07 14:53:01,772 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 705 predicate places. [2024-02-07 14:53:01,772 INFO L495 AbstractCegarLoop]: Abstraction has has 736 places, 5667 transitions, 308752 flow [2024-02-07 14:53:01,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.944444444444445) internal successors, (107), 18 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:53:01,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:53:01,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:53:01,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-02-07 14:53:01,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-07 14:53:01,982 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 14:53:01,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:53:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1061306176, now seen corresponding path program 22 times [2024-02-07 14:53:01,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:53:01,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251324988] [2024-02-07 14:53:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:53:01,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:53:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:53:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:53:02,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:53:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251324988] [2024-02-07 14:53:02,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251324988] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:53:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110478421] [2024-02-07 14:53:02,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:53:02,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:53:02,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:53:02,352 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:53:02,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-07 14:53:02,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:53:02,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:53:02,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:53:02,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:53:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:53:02,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:53:02,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:53:02,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110478421] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:53:02,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:53:02,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 10] total 24 [2024-02-07 14:53:02,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28934096] [2024-02-07 14:53:02,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:53:02,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-07 14:53:02,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:53:02,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-07 14:53:02,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2024-02-07 14:53:03,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 14:53:03,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 736 places, 5667 transitions, 308752 flow. Second operand has 24 states, 24 states have (on average 5.708333333333333) internal successors, (137), 24 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:53:03,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:53:03,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 14:53:03,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15