./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 e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/popl20-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-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:18:21,713 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:18:21,791 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:18:21,800 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:18:21,801 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:18:21,836 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:18:21,837 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:18:21,837 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:18:21,838 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:18:21,842 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:18:21,842 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:18:21,843 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:18:21,844 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:18:21,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:18:21,845 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:18:21,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:18:21,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:18:21,846 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:18:21,846 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:18:21,847 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:18:21,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:18:21,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:18:21,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:18:21,848 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:18:21,848 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:18:21,849 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:18:21,849 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:18:21,849 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:18:21,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:18:21,850 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:18:21,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:18:21,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:18:21,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:18:21,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:18:21,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:18:21,852 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:18:21,852 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:18:21,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:18:21,853 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:18:21,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:18:21,853 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:18:21,854 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:18:21,854 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:18:21,854 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:18:22,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:18:22,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:18:22,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:18:22,163 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:18:22,163 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:18:22,164 INFO L431 ainManager$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 19:18:22,266 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:18:22,267 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:18:22,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-02-07 19:18:23,477 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:18:23,673 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:18:23,674 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-02-07 19:18:23,680 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1942da7c4/600ab7d075ba4961934e2023e3c227be/FLAG0af2bf43a [2024-02-07 19:18:23,691 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1942da7c4/600ab7d075ba4961934e2023e3c227be [2024-02-07 19:18:23,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:18:23,693 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:18:23,696 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:18:23,697 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:18:23,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:18:23,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:18:22" (1/2) ... [2024-02-07 19:18:23,703 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be67a50 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:18:23, skipping insertion in model container [2024-02-07 19:18:23,703 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:18:22" (1/2) ... [2024-02-07 19:18:23,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26148a3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:18:23, skipping insertion in model container [2024-02-07 19:18:23,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:18:23" (2/2) ... [2024-02-07 19:18:23,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be67a50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:23, skipping insertion in model container [2024-02-07 19:18:23,706 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:18:23" (2/2) ... [2024-02-07 19:18:23,707 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:18:23,731 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:18:23,735 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 19:18:23,735 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 19:18:23,735 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] (1U <= counter) && (counter != 0U) [2024-02-07 19:18:23,735 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 19:18:23,735 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 19:18:23,755 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:18:23,892 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 19:18:23,896 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:18:23,903 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 19:18:23,989 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 19:18:23,995 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:18:24,009 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:18:24,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24 WrapperNode [2024-02-07 19:18:24,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:18:24,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:18:24,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:18:24,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:18:24,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,044 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,072 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2024-02-07 19:18:24,075 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:18:24,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:18:24,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:18:24,077 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:18:24,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,092 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,120 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 19:18:24,122 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,122 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,134 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,147 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,150 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:18:24,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:18:24,151 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:18:24,151 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:18:24,152 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (1/1) ... [2024-02-07 19:18:24,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:18:24,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:24,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:18:24,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:18:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:18:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:18:24,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:18:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:18:24,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:18:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:18:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:18:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:18:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:18:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:18:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:18:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:18:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 19:18:24,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 19:18:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:18:24,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:18:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:18:24,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:18:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:18:24,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:18:24,233 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:18:24,346 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:18:24,348 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:18:24,614 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:18:24,614 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:18:24,775 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:18:24,775 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 19:18:24,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:18:24 BoogieIcfgContainer [2024-02-07 19:18:24,776 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:18:24,779 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:18:24,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:18:24,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:18:24,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:18:22" (1/4) ... [2024-02-07 19:18:24,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f764f7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:18:24, skipping insertion in model container [2024-02-07 19:18:24,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:18:23" (2/4) ... [2024-02-07 19:18:24,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f764f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:18:24, skipping insertion in model container [2024-02-07 19:18:24,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:18:24" (3/4) ... [2024-02-07 19:18:24,785 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f764f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:18:24, skipping insertion in model container [2024-02-07 19:18:24,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:18:24" (4/4) ... [2024-02-07 19:18:24,786 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-02-07 19:18:24,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:18:24,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-02-07 19:18:24,802 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:18:24,853 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 19:18:24,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 29 transitions, 72 flow [2024-02-07 19:18:24,927 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2024-02-07 19:18:24,931 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 19:18:24,934 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 19:18:24,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 29 transitions, 72 flow [2024-02-07 19:18:24,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 26 transitions, 64 flow [2024-02-07 19:18:24,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:18:24,966 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;@3f426ee4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:18:24,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-02-07 19:18:24,973 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:18:24,973 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 19:18:24,974 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:18:24,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:24,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 19:18:24,975 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 19:18:24,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:24,981 INFO L85 PathProgramCache]: Analyzing trace with hash 8426, now seen corresponding path program 1 times [2024-02-07 19:18:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:24,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935980358] [2024-02-07 19:18:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:24,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:25,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:25,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935980358] [2024-02-07 19:18:25,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935980358] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:25,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:25,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:18:25,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968474751] [2024-02-07 19:18:25,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:25,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:18:25,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:18:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:18:25,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:18:25,368 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 19:18:25,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:25,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:18:25,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:25,453 INFO L124 PetriNetUnfolderBase]: 96/172 cut-off events. [2024-02-07 19:18:25,453 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-07 19:18:25,454 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 19:18:25,457 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-02-07 19:18:25,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 98 flow [2024-02-07 19:18:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:18:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:18:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2024-02-07 19:18:25,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39080459770114945 [2024-02-07 19:18:25,472 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 3 states and 34 transitions. [2024-02-07 19:18:25,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 98 flow [2024-02-07 19:18:25,474 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 19:18:25,476 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 52 flow [2024-02-07 19:18:25,478 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 19:18:25,481 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2024-02-07 19:18:25,482 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 52 flow [2024-02-07 19:18:25,482 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 19:18:25,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:25,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:25,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:18:25,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 8 more)] === [2024-02-07 19:18:25,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1501593757, now seen corresponding path program 1 times [2024-02-07 19:18:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:25,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127393184] [2024-02-07 19:18:25,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:25,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:25,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:25,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127393184] [2024-02-07 19:18:25,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127393184] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:25,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:25,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:18:25,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789308325] [2024-02-07 19:18:25,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:25,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:18:25,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:25,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:18:25,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:18:25,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-02-07 19:18:25,578 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 19:18:25,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:25,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-02-07 19:18:25,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:25,676 INFO L124 PetriNetUnfolderBase]: 73/138 cut-off events. [2024-02-07 19:18:25,676 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-02-07 19:18:25,677 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 19:18:25,679 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 25 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-02-07 19:18:25,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 31 transitions, 128 flow [2024-02-07 19:18:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:18:25,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:18:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-02-07 19:18:25,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-02-07 19:18:25,683 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 52 flow. Second operand 3 states and 50 transitions. [2024-02-07 19:18:25,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 31 transitions, 128 flow [2024-02-07 19:18:25,686 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 19:18:25,689 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 59 flow [2024-02-07 19:18:25,690 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 19:18:25,696 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2024-02-07 19:18:25,696 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 59 flow [2024-02-07 19:18:25,697 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 19:18:25,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:25,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:25,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:18:25,697 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 19:18:25,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:25,698 INFO L85 PathProgramCache]: Analyzing trace with hash 551778278, now seen corresponding path program 1 times [2024-02-07 19:18:25,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:25,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261067331] [2024-02-07 19:18:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:25,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:25,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:25,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261067331] [2024-02-07 19:18:25,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261067331] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:25,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:25,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:18:25,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590109866] [2024-02-07 19:18:25,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:25,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:18:25,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:25,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:18:25,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:18:25,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-02-07 19:18:25,868 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 19:18:25,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:25,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-02-07 19:18:25,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:25,980 INFO L124 PetriNetUnfolderBase]: 113/235 cut-off events. [2024-02-07 19:18:25,981 INFO L125 PetriNetUnfolderBase]: For 53/63 co-relation queries the response was YES. [2024-02-07 19:18:25,983 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 19:18:25,984 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 3/33 dead transitions. [2024-02-07 19:18:25,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 148 flow [2024-02-07 19:18:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:18:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:18:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-02-07 19:18:25,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-02-07 19:18:25,986 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 59 flow. Second operand 3 states and 51 transitions. [2024-02-07 19:18:25,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 148 flow [2024-02-07 19:18:25,987 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 19:18:25,988 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 68 flow [2024-02-07 19:18:25,988 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 19:18:25,989 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -4 predicate places. [2024-02-07 19:18:25,989 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 68 flow [2024-02-07 19:18:25,989 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 19:18:25,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:25,990 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 19:18:25,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:18:25,990 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 19:18:25,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:25,991 INFO L85 PathProgramCache]: Analyzing trace with hash 863029025, now seen corresponding path program 1 times [2024-02-07 19:18:25,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:25,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061541770] [2024-02-07 19:18:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:25,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:26,110 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 19:18:26,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:26,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061541770] [2024-02-07 19:18:26,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061541770] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:18:26,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:18:26,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:18:26,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215057057] [2024-02-07 19:18:26,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:18:26,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:18:26,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:18:26,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:18:26,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:18:26,125 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 19:18:26,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:26,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:18:26,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:26,211 INFO L124 PetriNetUnfolderBase]: 153/284 cut-off events. [2024-02-07 19:18:26,211 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-07 19:18:26,213 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 19:18:26,215 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 25 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2024-02-07 19:18:26,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 143 flow [2024-02-07 19:18:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:18:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:18:26,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2024-02-07 19:18:26,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2024-02-07 19:18:26,219 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 68 flow. Second operand 4 states and 53 transitions. [2024-02-07 19:18:26,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 143 flow [2024-02-07 19:18:26,222 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 19:18:26,223 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 82 flow [2024-02-07 19:18:26,223 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 19:18:26,225 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -1 predicate places. [2024-02-07 19:18:26,225 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 82 flow [2024-02-07 19:18:26,225 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 19:18:26,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:26,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:18:26,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:18:26,226 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 19:18:26,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:26,227 INFO L85 PathProgramCache]: Analyzing trace with hash 993093648, now seen corresponding path program 1 times [2024-02-07 19:18:26,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:26,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983807113] [2024-02-07 19:18:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:26,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:26,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:26,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983807113] [2024-02-07 19:18:26,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983807113] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:26,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806497266] [2024-02-07 19:18:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:26,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:26,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:26,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:18:26,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:18:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:26,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 19:18:26,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:18:26,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:27,078 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 19:18:27,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806497266] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:27,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:27,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 14 [2024-02-07 19:18:27,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437656277] [2024-02-07 19:18:27,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:27,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:18:27,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:18:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:18:27,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:18:27,094 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 19:18:27,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:27,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:18:27,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:27,477 INFO L124 PetriNetUnfolderBase]: 459/808 cut-off events. [2024-02-07 19:18:27,477 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2024-02-07 19:18:27,479 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 19:18:27,482 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 77 selfloop transitions, 18 changer transitions 18/114 dead transitions. [2024-02-07 19:18:27,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 114 transitions, 599 flow [2024-02-07 19:18:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:18:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:18:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-02-07 19:18:27,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-02-07 19:18:27,487 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 82 flow. Second operand 12 states and 145 transitions. [2024-02-07 19:18:27,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 114 transitions, 599 flow [2024-02-07 19:18:27,490 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 19:18:27,491 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 225 flow [2024-02-07 19:18:27,492 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 19:18:27,494 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 13 predicate places. [2024-02-07 19:18:27,494 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 225 flow [2024-02-07 19:18:27,494 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 19:18:27,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:27,494 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 19:18:27,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 19:18:27,708 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 19:18:27,708 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 19:18:27,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1153840512, now seen corresponding path program 2 times [2024-02-07 19:18:27,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:27,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575184282] [2024-02-07 19:18:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:27,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:27,908 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 19:18:27,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:27,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575184282] [2024-02-07 19:18:27,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575184282] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:27,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212468753] [2024-02-07 19:18:27,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:18:27,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:27,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:27,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:18:27,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:18:27,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:18:27,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:18:27,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:18:27,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:28,102 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 19:18:28,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:28,321 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 19:18:28,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212468753] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:28,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:28,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-02-07 19:18:28,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597836244] [2024-02-07 19:18:28,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:28,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-07 19:18:28,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-07 19:18:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-02-07 19:18:28,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:18:28,337 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 19:18:28,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:28,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:18:28,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:28,612 INFO L124 PetriNetUnfolderBase]: 487/852 cut-off events. [2024-02-07 19:18:28,613 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-02-07 19:18:28,615 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 19:18:28,619 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 58 selfloop transitions, 16 changer transitions 6/81 dead transitions. [2024-02-07 19:18:28,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 81 transitions, 553 flow [2024-02-07 19:18:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 19:18:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 19:18:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-02-07 19:18:28,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2024-02-07 19:18:28,622 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 225 flow. Second operand 7 states and 77 transitions. [2024-02-07 19:18:28,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 81 transitions, 553 flow [2024-02-07 19:18:28,628 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 19:18:28,630 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 322 flow [2024-02-07 19:18:28,631 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 19:18:28,633 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 20 predicate places. [2024-02-07 19:18:28,634 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 322 flow [2024-02-07 19:18:28,634 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 19:18:28,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:28,634 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 19:18:28,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 19:18:28,855 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 19:18:28,855 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 19:18:28,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash 988830597, now seen corresponding path program 3 times [2024-02-07 19:18:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:28,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769536634] [2024-02-07 19:18:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:29,068 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 19:18:29,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:29,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769536634] [2024-02-07 19:18:29,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769536634] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:29,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855508982] [2024-02-07 19:18:29,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:18:29,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:29,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:29,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:18:29,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 19:18:29,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 19:18:29,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:18:29,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 19:18:29,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:29,224 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 19:18:29,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:29,415 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 19:18:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855508982] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:29,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:29,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2024-02-07 19:18:29,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894660734] [2024-02-07 19:18:29,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:29,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 19:18:29,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:29,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 19:18:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-02-07 19:18:29,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:18:29,492 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 19:18:29,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:29,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:18:29,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:30,590 INFO L124 PetriNetUnfolderBase]: 723/1269 cut-off events. [2024-02-07 19:18:30,591 INFO L125 PetriNetUnfolderBase]: For 2799/2821 co-relation queries the response was YES. [2024-02-07 19:18:30,594 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 19:18:30,600 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 75 selfloop transitions, 125 changer transitions 42/253 dead transitions. [2024-02-07 19:18:30,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 253 transitions, 2034 flow [2024-02-07 19:18:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-07 19:18:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-07 19:18:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 373 transitions. [2024-02-07 19:18:30,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897596656217346 [2024-02-07 19:18:30,603 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 322 flow. Second operand 33 states and 373 transitions. [2024-02-07 19:18:30,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 253 transitions, 2034 flow [2024-02-07 19:18:30,613 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 19:18:30,617 INFO L231 Difference]: Finished difference. Result has 84 places, 162 transitions, 1438 flow [2024-02-07 19:18:30,617 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 19:18:30,617 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 53 predicate places. [2024-02-07 19:18:30,618 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 162 transitions, 1438 flow [2024-02-07 19:18:30,618 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 19:18:30,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:30,618 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 19:18:30,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 19:18:30,835 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 19:18:30,835 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 19:18:30,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash -555545731, now seen corresponding path program 4 times [2024-02-07 19:18:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:30,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712136060] [2024-02-07 19:18:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:31,110 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 19:18:31,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:31,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712136060] [2024-02-07 19:18:31,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712136060] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:31,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228489299] [2024-02-07 19:18:31,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:18:31,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:31,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:31,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:18:31,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 19:18:31,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:18:31,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:18:31,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:18:31,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:31,370 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 19:18:31,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:31,583 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 19:18:31,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228489299] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:31,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:31,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 20 [2024-02-07 19:18:31,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116874148] [2024-02-07 19:18:31,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:31,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 19:18:31,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:31,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 19:18:31,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2024-02-07 19:18:31,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:18:31,682 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 19:18:31,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:31,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:18:31,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:32,587 INFO L124 PetriNetUnfolderBase]: 1154/2055 cut-off events. [2024-02-07 19:18:32,587 INFO L125 PetriNetUnfolderBase]: For 5656/5684 co-relation queries the response was YES. [2024-02-07 19:18:32,594 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 19:18:32,606 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 161 selfloop transitions, 234 changer transitions 0/406 dead transitions. [2024-02-07 19:18:32,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 406 transitions, 4008 flow [2024-02-07 19:18:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-07 19:18:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-07 19:18:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 262 transitions. [2024-02-07 19:18:32,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106583072100313 [2024-02-07 19:18:32,608 INFO L175 Difference]: Start difference. First operand has 84 places, 162 transitions, 1438 flow. Second operand 22 states and 262 transitions. [2024-02-07 19:18:32,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 406 transitions, 4008 flow [2024-02-07 19:18:32,637 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 19:18:32,647 INFO L231 Difference]: Finished difference. Result has 108 places, 321 transitions, 3486 flow [2024-02-07 19:18:32,648 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 19:18:32,649 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 77 predicate places. [2024-02-07 19:18:32,649 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 321 transitions, 3486 flow [2024-02-07 19:18:32,650 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 19:18:32,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:32,650 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 19:18:32,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 19:18:32,864 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 19:18:32,864 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 19:18:32,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:32,865 INFO L85 PathProgramCache]: Analyzing trace with hash -865798485, now seen corresponding path program 5 times [2024-02-07 19:18:32,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:32,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620380465] [2024-02-07 19:18:32,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:32,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:33,132 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 19:18:33,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:33,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620380465] [2024-02-07 19:18:33,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620380465] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:33,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733831827] [2024-02-07 19:18:33,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:18:33,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:33,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:33,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:18:33,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 19:18:33,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-07 19:18:33,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:18:33,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:18:33,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:33,342 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 19:18:33,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:33,544 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 19:18:33,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733831827] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:33,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:33,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 19 [2024-02-07 19:18:33,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165050307] [2024-02-07 19:18:33,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:33,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 19:18:33,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:33,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 19:18:33,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-02-07 19:18:33,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:18:33,580 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 19:18:33,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:33,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:18:33,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:35,359 INFO L124 PetriNetUnfolderBase]: 1650/2809 cut-off events. [2024-02-07 19:18:35,360 INFO L125 PetriNetUnfolderBase]: For 11669/11669 co-relation queries the response was YES. [2024-02-07 19:18:35,370 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 19:18:35,431 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 232 selfloop transitions, 341 changer transitions 5/579 dead transitions. [2024-02-07 19:18:35,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 579 transitions, 6681 flow [2024-02-07 19:18:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-02-07 19:18:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-02-07 19:18:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 343 transitions. [2024-02-07 19:18:35,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3032714412024757 [2024-02-07 19:18:35,433 INFO L175 Difference]: Start difference. First operand has 108 places, 321 transitions, 3486 flow. Second operand 39 states and 343 transitions. [2024-02-07 19:18:35,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 579 transitions, 6681 flow [2024-02-07 19:18:35,507 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 19:18:35,516 INFO L231 Difference]: Finished difference. Result has 167 places, 464 transitions, 6286 flow [2024-02-07 19:18:35,516 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 19:18:35,517 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 136 predicate places. [2024-02-07 19:18:35,517 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 464 transitions, 6286 flow [2024-02-07 19:18:35,517 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 19:18:35,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:35,517 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 19:18:35,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 19:18:35,732 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 19:18:35,732 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 19:18:35,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:35,733 INFO L85 PathProgramCache]: Analyzing trace with hash 931767653, now seen corresponding path program 6 times [2024-02-07 19:18:35,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:35,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049161099] [2024-02-07 19:18:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:35,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:35,924 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 19:18:35,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:35,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049161099] [2024-02-07 19:18:35,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049161099] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:35,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88873097] [2024-02-07 19:18:35,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:18:35,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:35,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:35,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:18:35,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 19:18:36,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-07 19:18:36,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:18:36,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:18:36,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:36,150 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 19:18:36,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:36,408 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 19:18:36,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88873097] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:36,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:36,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 19 [2024-02-07 19:18:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720271971] [2024-02-07 19:18:36,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 19:18:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 19:18:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2024-02-07 19:18:36,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:18:36,485 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 19:18:36,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:36,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:18:36,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:38,600 INFO L124 PetriNetUnfolderBase]: 2153/3867 cut-off events. [2024-02-07 19:18:38,600 INFO L125 PetriNetUnfolderBase]: For 31535/31563 co-relation queries the response was YES. [2024-02-07 19:18:38,626 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 19:18:38,663 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 262 selfloop transitions, 564 changer transitions 5/850 dead transitions. [2024-02-07 19:18:38,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 850 transitions, 12400 flow [2024-02-07 19:18:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-02-07 19:18:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-02-07 19:18:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 477 transitions. [2024-02-07 19:18:38,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40117746005046256 [2024-02-07 19:18:38,666 INFO L175 Difference]: Start difference. First operand has 167 places, 464 transitions, 6286 flow. Second operand 41 states and 477 transitions. [2024-02-07 19:18:38,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 850 transitions, 12400 flow [2024-02-07 19:18:39,024 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 19:18:39,040 INFO L231 Difference]: Finished difference. Result has 224 places, 729 transitions, 11964 flow [2024-02-07 19:18:39,041 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 19:18:39,041 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 193 predicate places. [2024-02-07 19:18:39,042 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 729 transitions, 11964 flow [2024-02-07 19:18:39,042 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 19:18:39,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:39,042 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 19:18:39,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-07 19:18:39,254 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 19:18:39,254 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 19:18:39,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:39,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2007478809, now seen corresponding path program 7 times [2024-02-07 19:18:39,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:39,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161016059] [2024-02-07 19:18:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:39,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:39,475 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 19:18:39,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:39,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161016059] [2024-02-07 19:18:39,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161016059] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:39,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538441186] [2024-02-07 19:18:39,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:18:39,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:39,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:39,481 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 19:18:39,485 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 19:18:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:39,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:18:39,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:39,645 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 19:18:39,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:39,801 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 19:18:39,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538441186] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:39,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:39,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 15 [2024-02-07 19:18:39,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496869925] [2024-02-07 19:18:39,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:39,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 19:18:39,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 19:18:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-02-07 19:18:39,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:18:39,892 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 19:18:39,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:39,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:18:39,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:41,714 INFO L124 PetriNetUnfolderBase]: 2683/4725 cut-off events. [2024-02-07 19:18:41,714 INFO L125 PetriNetUnfolderBase]: For 58487/58549 co-relation queries the response was YES. [2024-02-07 19:18:41,751 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 19:18:41,784 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 246 selfloop transitions, 719 changer transitions 3/987 dead transitions. [2024-02-07 19:18:41,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 987 transitions, 18017 flow [2024-02-07 19:18:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-02-07 19:18:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-02-07 19:18:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 254 transitions. [2024-02-07 19:18:41,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981191222570533 [2024-02-07 19:18:41,787 INFO L175 Difference]: Start difference. First operand has 224 places, 729 transitions, 11964 flow. Second operand 22 states and 254 transitions. [2024-02-07 19:18:41,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 987 transitions, 18017 flow [2024-02-07 19:18:42,542 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 19:18:42,558 INFO L231 Difference]: Finished difference. Result has 251 places, 939 transitions, 18602 flow [2024-02-07 19:18:42,558 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 19:18:42,559 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 220 predicate places. [2024-02-07 19:18:42,559 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 939 transitions, 18602 flow [2024-02-07 19:18:42,559 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 19:18:42,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:42,559 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 19:18:42,570 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 19:18:42,759 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 19:18:42,760 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 19:18:42,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:42,760 INFO L85 PathProgramCache]: Analyzing trace with hash 700609565, now seen corresponding path program 8 times [2024-02-07 19:18:42,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:42,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604320679] [2024-02-07 19:18:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:43,035 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 19:18:43,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604320679] [2024-02-07 19:18:43,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604320679] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491765430] [2024-02-07 19:18:43,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:18:43,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:43,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:43,040 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 19:18:43,041 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 19:18:43,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:18:43,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:18:43,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:18:43,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:43,211 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 19:18:43,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:43,361 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 19:18:43,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491765430] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:43,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:43,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2024-02-07 19:18:43,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659829054] [2024-02-07 19:18:43,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:43,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 19:18:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 19:18:43,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-02-07 19:18:43,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:18:43,439 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 19:18:43,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:43,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:18:43,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:46,444 INFO L124 PetriNetUnfolderBase]: 4242/7135 cut-off events. [2024-02-07 19:18:46,444 INFO L125 PetriNetUnfolderBase]: For 118532/118532 co-relation queries the response was YES. [2024-02-07 19:18:46,486 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 19:18:46,535 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 425 selfloop transitions, 1212 changer transitions 10/1648 dead transitions. [2024-02-07 19:18:46,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1648 transitions, 34388 flow [2024-02-07 19:18:46,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-07 19:18:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-07 19:18:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 403 transitions. [2024-02-07 19:18:46,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37558247903075487 [2024-02-07 19:18:46,538 INFO L175 Difference]: Start difference. First operand has 251 places, 939 transitions, 18602 flow. Second operand 37 states and 403 transitions. [2024-02-07 19:18:46,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1648 transitions, 34388 flow [2024-02-07 19:18:48,466 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 19:18:48,496 INFO L231 Difference]: Finished difference. Result has 305 places, 1453 transitions, 33753 flow [2024-02-07 19:18:48,497 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 19:18:48,497 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 274 predicate places. [2024-02-07 19:18:48,497 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1453 transitions, 33753 flow [2024-02-07 19:18:48,498 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 19:18:48,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:48,498 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 19:18:48,510 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 19:18:48,699 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 19:18:48,700 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 19:18:48,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1041342131, now seen corresponding path program 9 times [2024-02-07 19:18:48,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:48,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641311019] [2024-02-07 19:18:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:48,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:48,889 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 19:18:48,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:48,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641311019] [2024-02-07 19:18:48,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641311019] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:48,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337519047] [2024-02-07 19:18:48,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:18:48,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:48,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:48,892 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 19:18:48,913 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 19:18:48,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 19:18:48,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:18:48,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-07 19:18:48,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:49,071 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 19:18:49,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:49,248 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 19:18:49,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337519047] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:49,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:49,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-02-07 19:18:49,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64473456] [2024-02-07 19:18:49,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:49,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 19:18:49,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 19:18:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-02-07 19:18:49,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:18:49,342 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 19:18:49,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:49,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:18:49,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:18:52,290 INFO L124 PetriNetUnfolderBase]: 4021/7039 cut-off events. [2024-02-07 19:18:52,290 INFO L125 PetriNetUnfolderBase]: For 177809/177833 co-relation queries the response was YES. [2024-02-07 19:18:52,352 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 19:18:52,416 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 470 selfloop transitions, 1131 changer transitions 5/1638 dead transitions. [2024-02-07 19:18:52,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1638 transitions, 40677 flow [2024-02-07 19:18:52,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 19:18:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 19:18:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 221 transitions. [2024-02-07 19:18:52,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3810344827586207 [2024-02-07 19:18:52,419 INFO L175 Difference]: Start difference. First operand has 305 places, 1453 transitions, 33753 flow. Second operand 20 states and 221 transitions. [2024-02-07 19:18:52,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1638 transitions, 40677 flow [2024-02-07 19:18:55,548 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 19:18:55,585 INFO L231 Difference]: Finished difference. Result has 332 places, 1593 transitions, 41442 flow [2024-02-07 19:18:55,586 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 19:18:55,587 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 301 predicate places. [2024-02-07 19:18:55,587 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1593 transitions, 41442 flow [2024-02-07 19:18:55,587 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 19:18:55,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:18:55,587 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 19:18:55,598 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 19:18:55,788 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 19:18:55,788 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 19:18:55,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:18:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash -382383531, now seen corresponding path program 10 times [2024-02-07 19:18:55,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:18:55,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242509656] [2024-02-07 19:18:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:18:55,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:18:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:18:56,023 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 19:18:56,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:18:56,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242509656] [2024-02-07 19:18:56,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242509656] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:18:56,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317876510] [2024-02-07 19:18:56,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:18:56,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:18:56,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:18:56,028 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 19:18:56,029 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 19:18:56,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:18:56,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:18:56,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:18:56,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:18:56,231 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 19:18:56,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:18:56,441 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 19:18:56,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317876510] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:18:56,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:18:56,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 19 [2024-02-07 19:18:56,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639944262] [2024-02-07 19:18:56,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:18:56,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 19:18:56,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:18:56,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 19:18:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2024-02-07 19:18:56,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:18:56,537 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 19:18:56,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:18:56,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:18:56,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:00,210 INFO L124 PetriNetUnfolderBase]: 4472/7819 cut-off events. [2024-02-07 19:19:00,210 INFO L125 PetriNetUnfolderBase]: For 244055/244103 co-relation queries the response was YES. [2024-02-07 19:19:00,282 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 19:19:00,344 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 439 selfloop transitions, 1420 changer transitions 2/1893 dead transitions. [2024-02-07 19:19:00,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1893 transitions, 51939 flow [2024-02-07 19:19:00,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-07 19:19:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-07 19:19:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 329 transitions. [2024-02-07 19:19:00,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4051724137931034 [2024-02-07 19:19:00,352 INFO L175 Difference]: Start difference. First operand has 332 places, 1593 transitions, 41442 flow. Second operand 28 states and 329 transitions. [2024-02-07 19:19:00,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1893 transitions, 51939 flow [2024-02-07 19:19:04,459 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 19:19:04,498 INFO L231 Difference]: Finished difference. Result has 356 places, 1811 transitions, 52615 flow [2024-02-07 19:19:04,499 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 19:19:04,499 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 325 predicate places. [2024-02-07 19:19:04,499 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 1811 transitions, 52615 flow [2024-02-07 19:19:04,500 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 19:19:04,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:04,501 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 19:19:04,512 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 19:19:04,703 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 19:19:04,703 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 19:19:04,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -909647139, now seen corresponding path program 11 times [2024-02-07 19:19:04,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:04,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093760514] [2024-02-07 19:19:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:04,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:04,896 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 19:19:04,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:04,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093760514] [2024-02-07 19:19:04,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093760514] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:19:04,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884644065] [2024-02-07 19:19:04,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:19:04,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:19:04,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:19:04,898 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 19:19:04,912 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 19:19:04,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-07 19:19:04,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:19:04,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-07 19:19:04,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:19:05,067 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 19:19:05,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:19:05,300 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 19:19:05,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884644065] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:19:05,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:19:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2024-02-07 19:19:05,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454426285] [2024-02-07 19:19:05,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:19:05,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 19:19:05,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 19:19:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-02-07 19:19:05,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:19:05,403 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 19:19:05,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:05,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:19:05,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:09,856 INFO L124 PetriNetUnfolderBase]: 4824/8383 cut-off events. [2024-02-07 19:19:09,857 INFO L125 PetriNetUnfolderBase]: For 309793/309811 co-relation queries the response was YES. [2024-02-07 19:19:09,931 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 19:19:09,980 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 238 selfloop transitions, 1786 changer transitions 3/2059 dead transitions. [2024-02-07 19:19:09,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 2059 transitions, 62274 flow [2024-02-07 19:19:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-07 19:19:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-07 19:19:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 373 transitions. [2024-02-07 19:19:09,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367487684729064 [2024-02-07 19:19:09,982 INFO L175 Difference]: Start difference. First operand has 356 places, 1811 transitions, 52615 flow. Second operand 35 states and 373 transitions. [2024-02-07 19:19:09,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 2059 transitions, 62274 flow [2024-02-07 19:19:15,449 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 19:19:15,492 INFO L231 Difference]: Finished difference. Result has 388 places, 2003 transitions, 62270 flow [2024-02-07 19:19:15,493 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 19:19:15,493 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 357 predicate places. [2024-02-07 19:19:15,494 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 2003 transitions, 62270 flow [2024-02-07 19:19:15,494 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 19:19:15,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:15,494 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 19:19:15,508 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 19:19:15,707 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 19:19:15,708 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 19:19:15,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash 422583267, now seen corresponding path program 12 times [2024-02-07 19:19:15,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:15,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7704562] [2024-02-07 19:19:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:15,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:15,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:15,931 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 19:19:15,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:15,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7704562] [2024-02-07 19:19:15,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7704562] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:19:15,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414588417] [2024-02-07 19:19:15,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:19:15,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:19:15,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:19:15,936 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 19:19:15,946 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 19:19:16,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 19:19:16,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:19:16,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:19:16,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:19:16,164 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 19:19:16,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:19:16,343 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 19:19:16,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414588417] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:19:16,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:19:16,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 20 [2024-02-07 19:19:16,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895961581] [2024-02-07 19:19:16,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:19:16,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 19:19:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:16,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 19:19:16,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-02-07 19:19:16,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:19:16,446 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 19:19:16,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:16,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:19:16,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:21,752 INFO L124 PetriNetUnfolderBase]: 5420/9457 cut-off events. [2024-02-07 19:19:21,752 INFO L125 PetriNetUnfolderBase]: For 393151/393186 co-relation queries the response was YES. [2024-02-07 19:19:21,859 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 19:19:21,928 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 1147 selfloop transitions, 1161 changer transitions 0/2340 dead transitions. [2024-02-07 19:19:21,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 2340 transitions, 76104 flow [2024-02-07 19:19:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-07 19:19:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-07 19:19:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 315 transitions. [2024-02-07 19:19:21,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2024-02-07 19:19:21,930 INFO L175 Difference]: Start difference. First operand has 388 places, 2003 transitions, 62270 flow. Second operand 28 states and 315 transitions. [2024-02-07 19:19:21,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 2340 transitions, 76104 flow [2024-02-07 19:19:29,848 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 19:19:29,907 INFO L231 Difference]: Finished difference. Result has 417 places, 2201 transitions, 72367 flow [2024-02-07 19:19:29,908 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 19:19:29,909 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 386 predicate places. [2024-02-07 19:19:29,909 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 2201 transitions, 72367 flow [2024-02-07 19:19:29,909 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 19:19:29,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:29,910 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 19:19:29,926 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 19:19:30,123 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 19:19:30,124 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 19:19:30,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash -929999177, now seen corresponding path program 13 times [2024-02-07 19:19:30,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:30,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536858986] [2024-02-07 19:19:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:30,302 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 19:19:30,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:30,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536858986] [2024-02-07 19:19:30,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536858986] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:19:30,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997430982] [2024-02-07 19:19:30,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:19:30,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:19:30,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:19:30,304 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 19:19:30,304 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 19:19:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:30,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:19:30,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:19:30,538 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 19:19:30,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:19:30,727 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 19:19:30,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997430982] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:19:30,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:19:30,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 18 [2024-02-07 19:19:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298680957] [2024-02-07 19:19:30,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:19:30,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 19:19:30,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 19:19:30,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-02-07 19:19:30,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:19:30,822 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 19:19:30,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:30,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:19:30,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:37,278 INFO L124 PetriNetUnfolderBase]: 5421/9460 cut-off events. [2024-02-07 19:19:37,278 INFO L125 PetriNetUnfolderBase]: For 428434/428457 co-relation queries the response was YES. [2024-02-07 19:19:37,365 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 19:19:37,419 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 769 selfloop transitions, 1514 changer transitions 3/2318 dead transitions. [2024-02-07 19:19:37,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 2318 transitions, 79416 flow [2024-02-07 19:19:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 19:19:37,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 19:19:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 280 transitions. [2024-02-07 19:19:37,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3713527851458886 [2024-02-07 19:19:37,420 INFO L175 Difference]: Start difference. First operand has 417 places, 2201 transitions, 72367 flow. Second operand 26 states and 280 transitions. [2024-02-07 19:19:37,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 2318 transitions, 79416 flow [2024-02-07 19:19:45,763 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 19:19:45,817 INFO L231 Difference]: Finished difference. Result has 442 places, 2262 transitions, 78597 flow [2024-02-07 19:19:45,819 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 19:19:45,819 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 411 predicate places. [2024-02-07 19:19:45,819 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 2262 transitions, 78597 flow [2024-02-07 19:19:45,819 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 19:19:45,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:19:45,819 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 19:19:45,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-02-07 19:19:46,020 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 19:19:46,020 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 19:19:46,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:19:46,020 INFO L85 PathProgramCache]: Analyzing trace with hash -659959471, now seen corresponding path program 14 times [2024-02-07 19:19:46,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:19:46,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4137681] [2024-02-07 19:19:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:19:46,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:19:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:19:46,175 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 19:19:46,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:19:46,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4137681] [2024-02-07 19:19:46,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4137681] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:19:46,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197151263] [2024-02-07 19:19:46,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:19:46,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:19:46,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:19:46,180 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 19:19:46,184 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 19:19:46,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:19:46,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:19:46,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 19:19:46,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:19:46,376 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 19:19:46,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:19:46,500 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 19:19:46,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197151263] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:19:46,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:19:46,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 16 [2024-02-07 19:19:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078494325] [2024-02-07 19:19:46,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:19:46,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 19:19:46,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:19:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 19:19:46,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-02-07 19:19:46,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-02-07 19:19:46,557 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 19:19:46,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:19:46,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-02-07 19:19:46,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:19:52,475 INFO L124 PetriNetUnfolderBase]: 5490/9553 cut-off events. [2024-02-07 19:19:52,475 INFO L125 PetriNetUnfolderBase]: For 481352/481371 co-relation queries the response was YES. [2024-02-07 19:19:52,584 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 19:19:52,656 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 1193 selfloop transitions, 1086 changer transitions 4/2315 dead transitions. [2024-02-07 19:19:52,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 2315 transitions, 84408 flow [2024-02-07 19:19:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 19:19:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 19:19:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 153 transitions. [2024-02-07 19:19:52,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3768472906403941 [2024-02-07 19:19:52,658 INFO L175 Difference]: Start difference. First operand has 442 places, 2262 transitions, 78597 flow. Second operand 14 states and 153 transitions. [2024-02-07 19:19:52,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 2315 transitions, 84408 flow [2024-02-07 19:20:02,067 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 19:20:02,122 INFO L231 Difference]: Finished difference. Result has 438 places, 2285 transitions, 83403 flow [2024-02-07 19:20:02,123 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 19:20:02,123 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 407 predicate places. [2024-02-07 19:20:02,123 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 2285 transitions, 83403 flow [2024-02-07 19:20:02,124 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 19:20:02,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:02,124 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 19:20:02,135 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 19:20:02,324 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 19:20:02,324 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 19:20:02,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:02,325 INFO L85 PathProgramCache]: Analyzing trace with hash 537352906, now seen corresponding path program 15 times [2024-02-07 19:20:02,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:02,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822982724] [2024-02-07 19:20:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:02,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:02,579 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 19:20:02,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:02,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822982724] [2024-02-07 19:20:02,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822982724] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:20:02,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505780148] [2024-02-07 19:20:02,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:20:02,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:20:02,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:20:02,581 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 19:20:02,583 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 19:20:02,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-07 19:20:02,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:20:02,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-07 19:20:02,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:20:03,019 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 19:20:03,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:20:03,406 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 19:20:03,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505780148] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:20:03,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:20:03,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 25 [2024-02-07 19:20:03,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983730742] [2024-02-07 19:20:03,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:20:03,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 19:20:03,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:03,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 19:20:03,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2024-02-07 19:20:03,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:20:03,490 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 19:20:03,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:03,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:20:03,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:13,389 INFO L124 PetriNetUnfolderBase]: 6971/11693 cut-off events. [2024-02-07 19:20:13,389 INFO L125 PetriNetUnfolderBase]: For 659119/659119 co-relation queries the response was YES. [2024-02-07 19:20:13,507 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 19:20:13,574 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 1506 selfloop transitions, 1360 changer transitions 39/2906 dead transitions. [2024-02-07 19:20:13,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 2906 transitions, 108462 flow [2024-02-07 19:20:13,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-02-07 19:20:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-02-07 19:20:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 467 transitions. [2024-02-07 19:20:13,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27293980128579776 [2024-02-07 19:20:13,577 INFO L175 Difference]: Start difference. First operand has 438 places, 2285 transitions, 83403 flow. Second operand 59 states and 467 transitions. [2024-02-07 19:20:13,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 2906 transitions, 108462 flow [2024-02-07 19:20:26,344 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 19:20:26,414 INFO L231 Difference]: Finished difference. Result has 514 places, 2621 transitions, 101854 flow [2024-02-07 19:20:26,415 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 19:20:26,416 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 483 predicate places. [2024-02-07 19:20:26,416 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 2621 transitions, 101854 flow [2024-02-07 19:20:26,416 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 19:20:26,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:26,416 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 19:20:26,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-07 19:20:26,617 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 19:20:26,617 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 19:20:26,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1110424500, now seen corresponding path program 16 times [2024-02-07 19:20:26,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:26,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596757771] [2024-02-07 19:20:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:26,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:27,203 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 19:20:27,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596757771] [2024-02-07 19:20:27,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596757771] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:20:27,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704023501] [2024-02-07 19:20:27,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:20:27,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:20:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:20:27,208 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 19:20:27,212 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 19:20:27,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:20:27,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:20:27,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-07 19:20:27,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:20:32,929 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 19:20:32,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:20:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:45,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704023501] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:20:45,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:20:45,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 25 [2024-02-07 19:20:45,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162194573] [2024-02-07 19:20:45,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:20:45,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 19:20:45,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 19:20:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=462, Unknown=2, NotChecked=0, Total=600 [2024-02-07 19:20:49,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 19:20:54,467 WARN L539 Checker$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 19:20:58,474 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 19:20:58,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:20:58,491 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 19:20:58,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:58,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:20:58,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:21:05,110 WARN L293 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 39 DAG size of output: 16 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-02-07 19:21:19,029 INFO L124 PetriNetUnfolderBase]: 10040/17126 cut-off events. [2024-02-07 19:21:19,029 INFO L125 PetriNetUnfolderBase]: For 1105447/1105447 co-relation queries the response was YES. [2024-02-07 19:21:19,249 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 19:21:19,352 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 2200 selfloop transitions, 1738 changer transitions 305/4244 dead transitions. [2024-02-07 19:21:19,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 4244 transitions, 171828 flow [2024-02-07 19:21:19,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-07 19:21:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-07 19:21:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 295 transitions. [2024-02-07 19:21:19,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3507728894173603 [2024-02-07 19:21:19,353 INFO L175 Difference]: Start difference. First operand has 514 places, 2621 transitions, 101854 flow. Second operand 29 states and 295 transitions. [2024-02-07 19:21:19,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 4244 transitions, 171828 flow [2024-02-07 19:21:48,368 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 19:21:48,480 INFO L231 Difference]: Finished difference. Result has 541 places, 3314 transitions, 140305 flow [2024-02-07 19:21:48,482 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 19:21:48,482 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 510 predicate places. [2024-02-07 19:21:48,483 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 3314 transitions, 140305 flow [2024-02-07 19:21:48,483 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 19:21:48,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:21:48,483 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 19:21:48,494 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 19:21:48,683 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 19:21:48,683 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 19:21:48,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:21:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash 52099676, now seen corresponding path program 17 times [2024-02-07 19:21:48,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:21:48,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768924286] [2024-02-07 19:21:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:21:48,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:21:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:21:48,940 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 19:21:48,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:21:48,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768924286] [2024-02-07 19:21:48,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768924286] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:21:48,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919580388] [2024-02-07 19:21:48,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:21:48,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:21:48,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:21:48,942 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 19:21:48,944 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 19:21:49,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-07 19:21:49,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:21:49,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:21:49,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:21:49,201 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 19:21:49,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:21:49,626 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 19:21:49,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919580388] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:21:49,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:21:49,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-02-07 19:21:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076485812] [2024-02-07 19:21:49,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:21:49,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-07 19:21:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:21:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-07 19:21:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-02-07 19:21:49,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:21:49,728 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 19:21:49,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:21:49,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:21:49,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:22:11,857 INFO L124 PetriNetUnfolderBase]: 10837/18667 cut-off events. [2024-02-07 19:22:11,857 INFO L125 PetriNetUnfolderBase]: For 1391094/1391094 co-relation queries the response was YES. [2024-02-07 19:22:12,160 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 19:22:12,419 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 1836 selfloop transitions, 2300 changer transitions 18/4155 dead transitions. [2024-02-07 19:22:12,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 4155 transitions, 181160 flow [2024-02-07 19:22:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-07 19:22:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-07 19:22:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 370 transitions. [2024-02-07 19:22:12,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26580459770114945 [2024-02-07 19:22:12,429 INFO L175 Difference]: Start difference. First operand has 541 places, 3314 transitions, 140305 flow. Second operand 48 states and 370 transitions. [2024-02-07 19:22:12,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 4155 transitions, 181160 flow [2024-02-07 19:22:50,287 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 19:22:50,451 INFO L231 Difference]: Finished difference. Result has 604 places, 3814 transitions, 171129 flow [2024-02-07 19:22:50,454 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 19:22:50,455 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 573 predicate places. [2024-02-07 19:22:50,455 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 3814 transitions, 171129 flow [2024-02-07 19:22:50,455 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 19:22:50,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:22:50,456 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 19:22:50,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-07 19:22:50,671 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 19:22:50,672 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 19:22:50,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:22:50,672 INFO L85 PathProgramCache]: Analyzing trace with hash 530474174, now seen corresponding path program 18 times [2024-02-07 19:22:50,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:22:50,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771882331] [2024-02-07 19:22:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:22:50,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:22:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:22:50,908 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 19:22:50,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:22:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771882331] [2024-02-07 19:22:50,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771882331] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:22:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112519940] [2024-02-07 19:22:50,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:22:50,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:22:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:22:50,910 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 19:22:50,911 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 19:22:50,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-07 19:22:50,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:22:51,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:22:51,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:22:51,170 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 19:22:51,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:22:51,583 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 19:22:51,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112519940] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:22:51,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:22:51,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2024-02-07 19:22:51,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081825581] [2024-02-07 19:22:51,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:22:51,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-07 19:22:51,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:22:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-07 19:22:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2024-02-07 19:22:51,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:22:51,675 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 19:22:51,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:22:51,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:22:51,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:23:21,023 INFO L124 PetriNetUnfolderBase]: 12202/20814 cut-off events. [2024-02-07 19:23:21,023 INFO L125 PetriNetUnfolderBase]: For 1657176/1657176 co-relation queries the response was YES. [2024-02-07 19:23:21,406 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 19:23:21,545 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 2114 selfloop transitions, 2392 changer transitions 12/4519 dead transitions. [2024-02-07 19:23:21,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 4519 transitions, 208522 flow [2024-02-07 19:23:21,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-07 19:23:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-07 19:23:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 256 transitions. [2024-02-07 19:23:21,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2942528735632184 [2024-02-07 19:23:21,546 INFO L175 Difference]: Start difference. First operand has 604 places, 3814 transitions, 171129 flow. Second operand 30 states and 256 transitions. [2024-02-07 19:23:21,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 4519 transitions, 208522 flow [2024-02-07 19:24:13,253 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 19:24:13,400 INFO L231 Difference]: Finished difference. Result has 638 places, 4332 transitions, 204262 flow [2024-02-07 19:24:13,403 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 19:24:13,403 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 607 predicate places. [2024-02-07 19:24:13,404 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 4332 transitions, 204262 flow [2024-02-07 19:24:13,404 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 19:24:13,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:24:13,404 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 19:24:13,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-02-07 19:24:13,611 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 19:24:13,612 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 19:24:13,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:24:13,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1127810832, now seen corresponding path program 19 times [2024-02-07 19:24:13,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:24:13,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891743490] [2024-02-07 19:24:13,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:24:13,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:24:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:24:13,855 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 19:24:13,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:24:13,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891743490] [2024-02-07 19:24:13,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891743490] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:24:13,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299350903] [2024-02-07 19:24:13,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:24:13,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:24:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:24:13,857 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 19:24:13,860 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 19:24:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:24:13,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2024-02-07 19:24:13,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:24:14,155 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 19:24:14,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:24:14,476 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 19:24:14,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299350903] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:24:14,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:24:14,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2024-02-07 19:24:14,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999415621] [2024-02-07 19:24:14,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:24:14,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-07 19:24:14,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:24:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-07 19:24:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2024-02-07 19:24:14,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:24:14,548 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 19:24:14,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:24:14,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:24:14,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:24:51,894 INFO L124 PetriNetUnfolderBase]: 12464/21252 cut-off events. [2024-02-07 19:24:51,895 INFO L125 PetriNetUnfolderBase]: For 1885328/1885328 co-relation queries the response was YES. [2024-02-07 19:24:52,388 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 19:24:52,549 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 1346 selfloop transitions, 3239 changer transitions 7/4593 dead transitions. [2024-02-07 19:24:52,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 4593 transitions, 221655 flow [2024-02-07 19:24:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-07 19:24:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-07 19:24:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 247 transitions. [2024-02-07 19:24:52,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2661637931034483 [2024-02-07 19:24:52,551 INFO L175 Difference]: Start difference. First operand has 638 places, 4332 transitions, 204262 flow. Second operand 32 states and 247 transitions. [2024-02-07 19:24:52,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 4593 transitions, 221655 flow [2024-02-07 19:25:51,787 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 19:25:51,964 INFO L231 Difference]: Finished difference. Result has 673 places, 4483 transitions, 222908 flow [2024-02-07 19:25:51,968 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 19:25:51,968 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 642 predicate places. [2024-02-07 19:25:51,968 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 4483 transitions, 222908 flow [2024-02-07 19:25:51,968 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 19:25:51,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:25:51,969 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 19:25:51,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-07 19:25:52,169 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 19:25:52,169 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 19:25:52,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:25:52,170 INFO L85 PathProgramCache]: Analyzing trace with hash 621464566, now seen corresponding path program 20 times [2024-02-07 19:25:52,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:25:52,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875908535] [2024-02-07 19:25:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:25:52,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:25:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:25:52,421 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 19:25:52,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:25:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875908535] [2024-02-07 19:25:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875908535] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:25:52,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836530305] [2024-02-07 19:25:52,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:25:52,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:25:52,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:25:52,424 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 19:25:52,425 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 19:25:52,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:25:52,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:25:52,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 19:25:52,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:25:52,735 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 19:25:52,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:25:53,086 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 19:25:53,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836530305] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:25:53,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:25:53,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2024-02-07 19:25:53,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035602347] [2024-02-07 19:25:53,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:25:53,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-07 19:25:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:25:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-07 19:25:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2024-02-07 19:25:53,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 29 [2024-02-07 19:25:53,158 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 19:25:53,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:25:53,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 29 [2024-02-07 19:25:53,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand