./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-figure3.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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-figure3.wvr.c ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-figure3.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.witness-ghost-b44c828-m [2024-05-12 10:54:57,918 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:54:57,990 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:54:57,994 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:54:57,995 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:54:58,031 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:54:58,031 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:54:58,032 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:54:58,032 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:54:58,035 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:54:58,036 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:54:58,036 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:54:58,037 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:54:58,038 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:54:58,038 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:54:58,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:54:58,039 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:54:58,039 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:54:58,039 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:54:58,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:54:58,039 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:54:58,040 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:54:58,040 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:54:58,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:54:58,040 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:54:58,040 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:54:58,041 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:54:58,041 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:54:58,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:54:58,042 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:54:58,042 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:54:58,043 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:54:58,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:54:58,043 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:54:58,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:54:58,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:54:58,044 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:54:58,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:54:58,044 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:54:58,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:54:58,044 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:54:58,044 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:54:58,045 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:54:58,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:54:58,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:54:58,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:54:58,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:54:58,296 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:54:58,296 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:54:58,297 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-05-12 10:54:59,409 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:54:59,579 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:54:59,580 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2024-05-12 10:54:59,589 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ae60502/fa6b7af329f84074b7489436594f9434/FLAG55ba7c3f0 [2024-05-12 10:54:59,623 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5ae60502/fa6b7af329f84074b7489436594f9434 [2024-05-12 10:54:59,625 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:54:59,626 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:54:59,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-figure3.wvr.yml/witness.yml [2024-05-12 10:54:59,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:54:59,700 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:54:59,701 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:54:59,701 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:54:59,705 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:54:59,705 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:54:59" (1/2) ... [2024-05-12 10:54:59,706 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c24947a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:54:59, skipping insertion in model container [2024-05-12 10:54:59,706 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:54:59" (1/2) ... [2024-05-12 10:54:59,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ffd9e2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:54:59, skipping insertion in model container [2024-05-12 10:54:59,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:54:59" (2/2) ... [2024-05-12 10:54:59,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c24947a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59, skipping insertion in model container [2024-05-12 10:54:59,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:54:59" (2/2) ... [2024-05-12 10:54:59,710 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:54:59,732 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:54:59,732 INFO L97 edCorrectnessWitness]: Location invariant before [L71-L71] ! multithreaded || ((((4294967295LL - (long long )N) + (long long )c >= 0LL && (long long )N + (long long )c >= 0LL) && (4294967295LL + (long long )N) - (long long )c >= 0LL) && (8589934590LL - (long long )N) - (long long )c >= 0LL) [2024-05-12 10:54:59,733 INFO L97 edCorrectnessWitness]: Location invariant before [L72-L72] ! multithreaded || ((((4294967295LL - (long long )N) + (long long )c >= 0LL && (long long )N + (long long )c >= 0LL) && (4294967295LL + (long long )N) - (long long )c >= 0LL) && (8589934590LL - (long long )N) - (long long )c >= 0LL) [2024-05-12 10:54:59,733 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:54:59,733 INFO L106 edCorrectnessWitness]: ghost_update [L70-L70] multithreaded = 1; [2024-05-12 10:54:59,748 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:54:59,877 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2024-05-12 10:54:59,880 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:54:59,886 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:54:59,932 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c[2121,2134] [2024-05-12 10:54:59,934 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:54:59,945 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:54:59,946 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59 WrapperNode [2024-05-12 10:54:59,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:54:59,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:54:59,947 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:54:59,947 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:54:59,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:54:59,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:54:59,974 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2024-05-12 10:54:59,974 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:54:59,979 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:54:59,980 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:54:59,980 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:55:00,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,003 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,014 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]. [2024-05-12 10:55:00,014 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,014 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,030 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,031 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,032 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:55:00,034 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:55:00,034 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:55:00,034 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:55:00,035 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (1/1) ... [2024-05-12 10:55:00,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:55:00,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:00,065 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) [2024-05-12 10:55:00,074 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 [2024-05-12 10:55:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:55:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 10:55:00,105 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 10:55:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 10:55:00,105 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 10:55:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:55:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:55:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:55:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:55:00,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:55:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:55:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:55:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:55:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:55:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:55:00,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:55:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 10:55:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 10:55:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 10:55:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:55:00,108 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:55:00,203 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:55:00,205 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:55:00,354 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:55:00,354 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:55:00,491 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:55:00,492 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-05-12 10:55:00,492 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:55:00 BoogieIcfgContainer [2024-05-12 10:55:00,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:55:00,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:55:00,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:55:00,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:55:00,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:54:59" (1/4) ... [2024-05-12 10:55:00,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cd483a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:55:00, skipping insertion in model container [2024-05-12 10:55:00,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:54:59" (2/4) ... [2024-05-12 10:55:00,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cd483a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:55:00, skipping insertion in model container [2024-05-12 10:55:00,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:54:59" (3/4) ... [2024-05-12 10:55:00,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50cd483a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:55:00, skipping insertion in model container [2024-05-12 10:55:00,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:55:00" (4/4) ... [2024-05-12 10:55:00,499 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2024-05-12 10:55:00,513 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:55:00,513 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 10:55:00,513 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:55:00,552 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-05-12 10:55:00,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 29 transitions, 72 flow [2024-05-12 10:55:00,623 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2024-05-12 10:55:00,623 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 10:55:00,626 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 4. Compared 32 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-05-12 10:55:00,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 29 transitions, 72 flow [2024-05-12 10:55:00,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 26 transitions, 64 flow [2024-05-12 10:55:00,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:55:00,648 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;@23a811a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:55:00,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 10:55:00,651 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:55:00,651 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:55:00,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:55:00,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:00,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:55:00,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:00,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1101726286, now seen corresponding path program 1 times [2024-05-12 10:55:00,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:00,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297861445] [2024-05-12 10:55:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:00,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:00,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:00,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297861445] [2024-05-12 10:55:00,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297861445] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:00,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:00,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:55:00,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055751477] [2024-05-12 10:55:00,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:00,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-05-12 10:55:00,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:00,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-05-12 10:55:00,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-05-12 10:55:00,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 29 [2024-05-12 10:55:00,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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) [2024-05-12 10:55:00,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:00,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 29 [2024-05-12 10:55:00,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:00,942 INFO L124 PetriNetUnfolderBase]: 92/164 cut-off events. [2024-05-12 10:55:00,942 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-05-12 10:55:00,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 164 events. 92/164 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 560 event pairs, 46 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 267. Up to 147 conditions per place. [2024-05-12 10:55:00,945 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 18 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2024-05-12 10:55:00,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 24 transitions, 96 flow [2024-05-12 10:55:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-05-12 10:55:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-05-12 10:55:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2024-05-12 10:55:00,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-05-12 10:55:00,956 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 2 states and 36 transitions. [2024-05-12 10:55:00,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 24 transitions, 96 flow [2024-05-12 10:55:00,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 10:55:00,960 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 52 flow [2024-05-12 10:55:00,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2024-05-12 10:55:00,978 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -5 predicate places. [2024-05-12 10:55:00,978 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 52 flow [2024-05-12 10:55:00,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 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) [2024-05-12 10:55:00,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:00,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:55:00,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:55:00,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:00,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash 966269772, now seen corresponding path program 1 times [2024-05-12 10:55:00,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:00,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046739525] [2024-05-12 10:55:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:01,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:01,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046739525] [2024-05-12 10:55:01,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046739525] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:01,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:01,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:55:01,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99352118] [2024-05-12 10:55:01,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:01,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:55:01,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:01,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:55:01,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:55:01,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-05-12 10:55:01,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 52 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) [2024-05-12 10:55:01,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:01,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-05-12 10:55:01,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:01,306 INFO L124 PetriNetUnfolderBase]: 111/218 cut-off events. [2024-05-12 10:55:01,307 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 10:55:01,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 218 events. 111/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 791 event pairs, 30 based on Foata normal form. 5/220 useless extension candidates. Maximal degree in co-relation 416. Up to 153 conditions per place. [2024-05-12 10:55:01,310 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 24 selfloop transitions, 2 changer transitions 4/35 dead transitions. [2024-05-12 10:55:01,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 35 transitions, 137 flow [2024-05-12 10:55:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:55:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:55:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-05-12 10:55:01,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2024-05-12 10:55:01,313 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 52 flow. Second operand 3 states and 53 transitions. [2024-05-12 10:55:01,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 35 transitions, 137 flow [2024-05-12 10:55:01,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 137 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 10:55:01,318 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 66 flow [2024-05-12 10:55:01,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-05-12 10:55:01,320 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -2 predicate places. [2024-05-12 10:55:01,321 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 66 flow [2024-05-12 10:55:01,321 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) [2024-05-12 10:55:01,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:01,321 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] [2024-05-12 10:55:01,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:55:01,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:01,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:01,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2064341186, now seen corresponding path program 1 times [2024-05-12 10:55:01,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:01,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169137933] [2024-05-12 10:55:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:01,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:01,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169137933] [2024-05-12 10:55:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169137933] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:55:01,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:55:01,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:55:01,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615327933] [2024-05-12 10:55:01,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:01,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:55:01,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:01,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:55:01,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:55:01,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:01,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-05-12 10:55:01,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:01,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:01,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:01,704 INFO L124 PetriNetUnfolderBase]: 251/457 cut-off events. [2024-05-12 10:55:01,705 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-05-12 10:55:01,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 457 events. 251/457 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1716 event pairs, 106 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 953. Up to 228 conditions per place. [2024-05-12 10:55:01,708 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 39 selfloop transitions, 3 changer transitions 4/49 dead transitions. [2024-05-12 10:55:01,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 213 flow [2024-05-12 10:55:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:55:01,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:55:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-05-12 10:55:01,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689655172413793 [2024-05-12 10:55:01,709 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 66 flow. Second operand 5 states and 68 transitions. [2024-05-12 10:55:01,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 213 flow [2024-05-12 10:55:01,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:55:01,711 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 90 flow [2024-05-12 10:55:01,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-05-12 10:55:01,712 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2024-05-12 10:55:01,712 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 90 flow [2024-05-12 10:55:01,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-05-12 10:55:01,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:01,712 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] [2024-05-12 10:55:01,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:55:01,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:01,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash -416174922, now seen corresponding path program 2 times [2024-05-12 10:55:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:01,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384209439] [2024-05-12 10:55:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:01,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:01,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384209439] [2024-05-12 10:55:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384209439] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:01,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556132591] [2024-05-12 10:55:01,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:55:01,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:01,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:01,843 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) [2024-05-12 10:55:01,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 10:55:01,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:55:01,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:01,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2024-05-12 10:55:01,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:01,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:02,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556132591] provided 1 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:02,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-05-12 10:55:02,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-05-12 10:55:02,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707945049] [2024-05-12 10:55:02,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:55:02,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:55:02,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:02,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:55:02,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:55:02,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-05-12 10:55:02,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-05-12 10:55:02,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:02,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-05-12 10:55:02,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:02,098 INFO L124 PetriNetUnfolderBase]: 257/470 cut-off events. [2024-05-12 10:55:02,098 INFO L125 PetriNetUnfolderBase]: For 273/284 co-relation queries the response was YES. [2024-05-12 10:55:02,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1244 conditions, 470 events. 257/470 cut-off events. For 273/284 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1808 event pairs, 57 based on Foata normal form. 14/481 useless extension candidates. Maximal degree in co-relation 1236. Up to 199 conditions per place. [2024-05-12 10:55:02,101 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 33 selfloop transitions, 6 changer transitions 5/48 dead transitions. [2024-05-12 10:55:02,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 243 flow [2024-05-12 10:55:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:55:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:55:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2024-05-12 10:55:02,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2024-05-12 10:55:02,103 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 90 flow. Second operand 4 states and 63 transitions. [2024-05-12 10:55:02,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 243 flow [2024-05-12 10:55:02,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 228 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 10:55:02,106 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 128 flow [2024-05-12 10:55:02,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-05-12 10:55:02,107 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2024-05-12 10:55:02,107 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 128 flow [2024-05-12 10:55:02,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2024-05-12 10:55:02,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:02,107 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] [2024-05-12 10:55:02,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:02,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:02,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:02,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1537548550, now seen corresponding path program 3 times [2024-05-12 10:55:02,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:02,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216922144] [2024-05-12 10:55:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:02,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:02,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:02,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216922144] [2024-05-12 10:55:02,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216922144] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:02,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395385841] [2024-05-12 10:55:02,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 10:55:02,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:02,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:02,428 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) [2024-05-12 10:55:02,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-05-12 10:55:02,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-05-12 10:55:02,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:02,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2024-05-12 10:55:02,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:02,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:02,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395385841] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:02,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:02,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-05-12 10:55:02,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959289832] [2024-05-12 10:55:02,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:02,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:55:02,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:55:02,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:55:02,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:02,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 128 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 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) [2024-05-12 10:55:02,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:02,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:02,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:02,751 INFO L124 PetriNetUnfolderBase]: 310/548 cut-off events. [2024-05-12 10:55:02,752 INFO L125 PetriNetUnfolderBase]: For 520/520 co-relation queries the response was YES. [2024-05-12 10:55:02,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1602 conditions, 548 events. 310/548 cut-off events. For 520/520 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2102 event pairs, 79 based on Foata normal form. 20/563 useless extension candidates. Maximal degree in co-relation 1593. Up to 195 conditions per place. [2024-05-12 10:55:02,755 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 50 selfloop transitions, 15 changer transitions 3/71 dead transitions. [2024-05-12 10:55:02,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 71 transitions, 409 flow [2024-05-12 10:55:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:55:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:55:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-05-12 10:55:02,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630541871921182 [2024-05-12 10:55:02,759 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 128 flow. Second operand 7 states and 94 transitions. [2024-05-12 10:55:02,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 71 transitions, 409 flow [2024-05-12 10:55:02,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 409 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 10:55:02,765 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 243 flow [2024-05-12 10:55:02,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-05-12 10:55:02,767 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 17 predicate places. [2024-05-12 10:55:02,767 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 243 flow [2024-05-12 10:55:02,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 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) [2024-05-12 10:55:02,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:02,767 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, 1, 1, 1] [2024-05-12 10:55:02,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:02,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:02,980 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:02,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1017172751, now seen corresponding path program 1 times [2024-05-12 10:55:02,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:02,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916987329] [2024-05-12 10:55:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:02,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:03,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916987329] [2024-05-12 10:55:03,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916987329] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:03,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543194669] [2024-05-12 10:55:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:03,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:03,080 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) [2024-05-12 10:55:03,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-05-12 10:55:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:03,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2024-05-12 10:55:03,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:03,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:03,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543194669] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:03,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:03,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2024-05-12 10:55:03,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70966229] [2024-05-12 10:55:03,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:03,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:55:03,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:03,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:55:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:55:03,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-05-12 10:55:03,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:03,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:03,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-05-12 10:55:03,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:03,336 INFO L124 PetriNetUnfolderBase]: 349/705 cut-off events. [2024-05-12 10:55:03,336 INFO L125 PetriNetUnfolderBase]: For 1574/1621 co-relation queries the response was YES. [2024-05-12 10:55:03,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2411 conditions, 705 events. 349/705 cut-off events. For 1574/1621 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3467 event pairs, 91 based on Foata normal form. 44/734 useless extension candidates. Maximal degree in co-relation 2398. Up to 242 conditions per place. [2024-05-12 10:55:03,341 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 45 selfloop transitions, 5 changer transitions 4/71 dead transitions. [2024-05-12 10:55:03,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 482 flow [2024-05-12 10:55:03,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:55:03,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:55:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-05-12 10:55:03,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6637931034482759 [2024-05-12 10:55:03,343 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 243 flow. Second operand 4 states and 77 transitions. [2024-05-12 10:55:03,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 482 flow [2024-05-12 10:55:03,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 71 transitions, 438 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-05-12 10:55:03,348 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 249 flow [2024-05-12 10:55:03,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-05-12 10:55:03,371 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 18 predicate places. [2024-05-12 10:55:03,371 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 249 flow [2024-05-12 10:55:03,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:55:03,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:03,371 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, 1, 1, 1] [2024-05-12 10:55:03,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:03,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:03,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:03,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:03,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1379399645, now seen corresponding path program 2 times [2024-05-12 10:55:03,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:03,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413590094] [2024-05-12 10:55:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:03,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:03,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:03,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413590094] [2024-05-12 10:55:03,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413590094] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:03,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142890273] [2024-05-12 10:55:03,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:55:03,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:03,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:03,727 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) [2024-05-12 10:55:03,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-05-12 10:55:03,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:55:03,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:03,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:03,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:03,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142890273] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:03,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:03,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-05-12 10:55:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353463413] [2024-05-12 10:55:03,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:03,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-05-12 10:55:03,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:03,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-05-12 10:55:03,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-05-12 10:55:03,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:03,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 249 flow. Second operand has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 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) [2024-05-12 10:55:03,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:03,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:03,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:04,499 INFO L124 PetriNetUnfolderBase]: 1059/1815 cut-off events. [2024-05-12 10:55:04,500 INFO L125 PetriNetUnfolderBase]: For 3400/3433 co-relation queries the response was YES. [2024-05-12 10:55:04,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6596 conditions, 1815 events. 1059/1815 cut-off events. For 3400/3433 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8959 event pairs, 33 based on Foata normal form. 46/1852 useless extension candidates. Maximal degree in co-relation 6582. Up to 400 conditions per place. [2024-05-12 10:55:04,510 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 129 selfloop transitions, 75 changer transitions 17/226 dead transitions. [2024-05-12 10:55:04,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 226 transitions, 1635 flow [2024-05-12 10:55:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-05-12 10:55:04,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-05-12 10:55:04,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 275 transitions. [2024-05-12 10:55:04,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122938530734633 [2024-05-12 10:55:04,512 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 249 flow. Second operand 23 states and 275 transitions. [2024-05-12 10:55:04,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 226 transitions, 1635 flow [2024-05-12 10:55:04,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 226 transitions, 1611 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-05-12 10:55:04,519 INFO L231 Difference]: Finished difference. Result has 78 places, 116 transitions, 988 flow [2024-05-12 10:55:04,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=988, PETRI_PLACES=78, PETRI_TRANSITIONS=116} [2024-05-12 10:55:04,519 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 47 predicate places. [2024-05-12 10:55:04,519 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 116 transitions, 988 flow [2024-05-12 10:55:04,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 12 states have internal predecessors, (90), 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) [2024-05-12 10:55:04,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:04,520 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, 1, 1, 1] [2024-05-12 10:55:04,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:04,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:04,731 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:04,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:04,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1908091745, now seen corresponding path program 3 times [2024-05-12 10:55:04,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:04,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164332121] [2024-05-12 10:55:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:04,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:04,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:04,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164332121] [2024-05-12 10:55:04,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164332121] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:04,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210932374] [2024-05-12 10:55:04,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 10:55:04,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:04,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:04,886 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) [2024-05-12 10:55:04,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-05-12 10:55:04,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-05-12 10:55:04,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:04,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:04,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:04,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:05,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210932374] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:05,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:05,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-05-12 10:55:05,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342679197] [2024-05-12 10:55:05,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:05,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:55:05,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:05,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:55:05,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:55:05,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:05,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 116 transitions, 988 flow. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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) [2024-05-12 10:55:05,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:05,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:05,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:05,467 INFO L124 PetriNetUnfolderBase]: 1280/2184 cut-off events. [2024-05-12 10:55:05,468 INFO L125 PetriNetUnfolderBase]: For 7358/7382 co-relation queries the response was YES. [2024-05-12 10:55:05,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9614 conditions, 2184 events. 1280/2184 cut-off events. For 7358/7382 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11441 event pairs, 217 based on Foata normal form. 36/2205 useless extension candidates. Maximal degree in co-relation 9593. Up to 924 conditions per place. [2024-05-12 10:55:05,482 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 149 selfloop transitions, 77 changer transitions 7/238 dead transitions. [2024-05-12 10:55:05,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 238 transitions, 2307 flow [2024-05-12 10:55:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-05-12 10:55:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-05-12 10:55:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 171 transitions. [2024-05-12 10:55:05,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3931034482758621 [2024-05-12 10:55:05,484 INFO L175 Difference]: Start difference. First operand has 78 places, 116 transitions, 988 flow. Second operand 15 states and 171 transitions. [2024-05-12 10:55:05,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 238 transitions, 2307 flow [2024-05-12 10:55:05,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 238 transitions, 2107 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-05-12 10:55:05,519 INFO L231 Difference]: Finished difference. Result has 96 places, 157 transitions, 1431 flow [2024-05-12 10:55:05,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1431, PETRI_PLACES=96, PETRI_TRANSITIONS=157} [2024-05-12 10:55:05,520 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 65 predicate places. [2024-05-12 10:55:05,520 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 157 transitions, 1431 flow [2024-05-12 10:55:05,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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) [2024-05-12 10:55:05,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:05,520 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, 1, 1, 1] [2024-05-12 10:55:05,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:05,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:05,732 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:05,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1240378389, now seen corresponding path program 4 times [2024-05-12 10:55:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:05,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833192369] [2024-05-12 10:55:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:05,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:05,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:05,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833192369] [2024-05-12 10:55:05,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833192369] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:05,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279080722] [2024-05-12 10:55:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 10:55:05,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:05,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:05,874 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) [2024-05-12 10:55:05,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-05-12 10:55:05,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 10:55:05,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:05,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:05,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:06,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:06,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279080722] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:06,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:06,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-05-12 10:55:06,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221701100] [2024-05-12 10:55:06,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:06,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-05-12 10:55:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:06,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-05-12 10:55:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-05-12 10:55:06,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:06,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 157 transitions, 1431 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 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) [2024-05-12 10:55:06,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:06,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:06,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:06,913 INFO L124 PetriNetUnfolderBase]: 2041/3461 cut-off events. [2024-05-12 10:55:06,914 INFO L125 PetriNetUnfolderBase]: For 15443/15473 co-relation queries the response was YES. [2024-05-12 10:55:06,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15045 conditions, 3461 events. 2041/3461 cut-off events. For 15443/15473 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19476 event pairs, 85 based on Foata normal form. 109/3504 useless extension candidates. Maximal degree in co-relation 15017. Up to 435 conditions per place. [2024-05-12 10:55:06,938 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 186 selfloop transitions, 209 changer transitions 3/403 dead transitions. [2024-05-12 10:55:06,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 403 transitions, 3751 flow [2024-05-12 10:55:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-05-12 10:55:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-05-12 10:55:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 379 transitions. [2024-05-12 10:55:06,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3960292580982236 [2024-05-12 10:55:06,941 INFO L175 Difference]: Start difference. First operand has 96 places, 157 transitions, 1431 flow. Second operand 33 states and 379 transitions. [2024-05-12 10:55:06,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 403 transitions, 3751 flow [2024-05-12 10:55:06,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 403 transitions, 3725 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-05-12 10:55:06,989 INFO L231 Difference]: Finished difference. Result has 143 places, 262 transitions, 2969 flow [2024-05-12 10:55:06,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1405, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2969, PETRI_PLACES=143, PETRI_TRANSITIONS=262} [2024-05-12 10:55:06,990 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 112 predicate places. [2024-05-12 10:55:06,990 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 262 transitions, 2969 flow [2024-05-12 10:55:06,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 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) [2024-05-12 10:55:06,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:06,991 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, 1, 1, 1] [2024-05-12 10:55:07,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:07,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:07,202 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:07,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:07,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2009483479, now seen corresponding path program 5 times [2024-05-12 10:55:07,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:07,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497616985] [2024-05-12 10:55:07,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:07,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:07,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:07,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497616985] [2024-05-12 10:55:07,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497616985] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:07,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856846450] [2024-05-12 10:55:07,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 10:55:07,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:07,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:07,328 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) [2024-05-12 10:55:07,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-05-12 10:55:07,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:55:07,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:07,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 10:55:07,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:07,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856846450] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:07,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:07,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-05-12 10:55:07,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047041584] [2024-05-12 10:55:07,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:07,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-05-12 10:55:07,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:07,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-05-12 10:55:07,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-05-12 10:55:07,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:07,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 262 transitions, 2969 flow. Second operand has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 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) [2024-05-12 10:55:07,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:07,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:07,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:09,027 INFO L124 PetriNetUnfolderBase]: 3073/5275 cut-off events. [2024-05-12 10:55:09,027 INFO L125 PetriNetUnfolderBase]: For 59176/59212 co-relation queries the response was YES. [2024-05-12 10:55:09,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27441 conditions, 5275 events. 3073/5275 cut-off events. For 59176/59212 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32589 event pairs, 110 based on Foata normal form. 132/5380 useless extension candidates. Maximal degree in co-relation 27396. Up to 661 conditions per place. [2024-05-12 10:55:09,071 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 218 selfloop transitions, 345 changer transitions 7/575 dead transitions. [2024-05-12 10:55:09,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 575 transitions, 6684 flow [2024-05-12 10:55:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-05-12 10:55:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-05-12 10:55:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 392 transitions. [2024-05-12 10:55:09,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36533084808946875 [2024-05-12 10:55:09,074 INFO L175 Difference]: Start difference. First operand has 143 places, 262 transitions, 2969 flow. Second operand 37 states and 392 transitions. [2024-05-12 10:55:09,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 575 transitions, 6684 flow [2024-05-12 10:55:09,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 575 transitions, 6569 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-05-12 10:55:09,345 INFO L231 Difference]: Finished difference. Result has 193 places, 407 transitions, 5681 flow [2024-05-12 10:55:09,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=5681, PETRI_PLACES=193, PETRI_TRANSITIONS=407} [2024-05-12 10:55:09,346 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 162 predicate places. [2024-05-12 10:55:09,346 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 407 transitions, 5681 flow [2024-05-12 10:55:09,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.470588235294118) internal successors, (110), 17 states have internal predecessors, (110), 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) [2024-05-12 10:55:09,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:09,346 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, 1, 1, 1] [2024-05-12 10:55:09,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:09,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:09,557 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:09,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1954129725, now seen corresponding path program 6 times [2024-05-12 10:55:09,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:09,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892446435] [2024-05-12 10:55:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:09,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:09,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:09,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892446435] [2024-05-12 10:55:09,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892446435] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:09,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969099778] [2024-05-12 10:55:09,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 10:55:09,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:09,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:09,657 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) [2024-05-12 10:55:09,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-05-12 10:55:09,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-05-12 10:55:09,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:09,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:09,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:09,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:09,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969099778] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:09,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:09,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-05-12 10:55:09,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479850443] [2024-05-12 10:55:09,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:09,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-05-12 10:55:09,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:09,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-05-12 10:55:09,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-05-12 10:55:09,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:09,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 407 transitions, 5681 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 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) [2024-05-12 10:55:09,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:09,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:09,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:11,531 INFO L124 PetriNetUnfolderBase]: 3664/6198 cut-off events. [2024-05-12 10:55:11,531 INFO L125 PetriNetUnfolderBase]: For 104713/104755 co-relation queries the response was YES. [2024-05-12 10:55:11,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39636 conditions, 6198 events. 3664/6198 cut-off events. For 104713/104755 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 38427 event pairs, 364 based on Foata normal form. 78/6243 useless extension candidates. Maximal degree in co-relation 39575. Up to 1532 conditions per place. [2024-05-12 10:55:11,577 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 272 selfloop transitions, 300 changer transitions 6/583 dead transitions. [2024-05-12 10:55:11,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 583 transitions, 9037 flow [2024-05-12 10:55:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-05-12 10:55:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-05-12 10:55:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 281 transitions. [2024-05-12 10:55:11,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42128935532233885 [2024-05-12 10:55:11,579 INFO L175 Difference]: Start difference. First operand has 193 places, 407 transitions, 5681 flow. Second operand 23 states and 281 transitions. [2024-05-12 10:55:11,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 583 transitions, 9037 flow [2024-05-12 10:55:12,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 583 transitions, 8783 flow, removed 102 selfloop flow, removed 7 redundant places. [2024-05-12 10:55:12,375 INFO L231 Difference]: Finished difference. Result has 208 places, 470 transitions, 7559 flow [2024-05-12 10:55:12,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7559, PETRI_PLACES=208, PETRI_TRANSITIONS=470} [2024-05-12 10:55:12,376 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 177 predicate places. [2024-05-12 10:55:12,376 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 470 transitions, 7559 flow [2024-05-12 10:55:12,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 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) [2024-05-12 10:55:12,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:12,377 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, 1, 1, 1] [2024-05-12 10:55:12,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:12,590 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,SelfDestructingSolverStorable10 [2024-05-12 10:55:12,591 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:12,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:12,591 INFO L85 PathProgramCache]: Analyzing trace with hash -594347705, now seen corresponding path program 7 times [2024-05-12 10:55:12,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:12,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988842001] [2024-05-12 10:55:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:12,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:12,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988842001] [2024-05-12 10:55:12,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988842001] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720338264] [2024-05-12 10:55:12,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 10:55:12,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:12,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:12,734 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) [2024-05-12 10:55:12,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-05-12 10:55:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:12,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:12,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:12,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:12,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720338264] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:12,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:12,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-05-12 10:55:12,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572290289] [2024-05-12 10:55:12,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:12,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-05-12 10:55:12,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-05-12 10:55:12,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-05-12 10:55:12,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:12,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 470 transitions, 7559 flow. Second operand has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 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) [2024-05-12 10:55:12,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:12,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:12,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:14,647 INFO L124 PetriNetUnfolderBase]: 4854/8199 cut-off events. [2024-05-12 10:55:14,647 INFO L125 PetriNetUnfolderBase]: For 173255/173303 co-relation queries the response was YES. [2024-05-12 10:55:14,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54714 conditions, 8199 events. 4854/8199 cut-off events. For 173255/173303 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 53488 event pairs, 385 based on Foata normal form. 107/8249 useless extension candidates. Maximal degree in co-relation 54656. Up to 1416 conditions per place. [2024-05-12 10:55:14,717 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 236 selfloop transitions, 499 changer transitions 9/749 dead transitions. [2024-05-12 10:55:14,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 749 transitions, 12627 flow [2024-05-12 10:55:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-05-12 10:55:14,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-05-12 10:55:14,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 316 transitions. [2024-05-12 10:55:14,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2024-05-12 10:55:14,719 INFO L175 Difference]: Start difference. First operand has 208 places, 470 transitions, 7559 flow. Second operand 28 states and 316 transitions. [2024-05-12 10:55:14,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 749 transitions, 12627 flow [2024-05-12 10:55:16,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 749 transitions, 11627 flow, removed 445 selfloop flow, removed 6 redundant places. [2024-05-12 10:55:16,696 INFO L231 Difference]: Finished difference. Result has 240 places, 635 transitions, 11445 flow [2024-05-12 10:55:16,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=6922, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11445, PETRI_PLACES=240, PETRI_TRANSITIONS=635} [2024-05-12 10:55:16,697 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 209 predicate places. [2024-05-12 10:55:16,697 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 635 transitions, 11445 flow [2024-05-12 10:55:16,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 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) [2024-05-12 10:55:16,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:16,697 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, 1, 1, 1] [2024-05-12 10:55:16,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:16,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:16,908 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:16,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:16,909 INFO L85 PathProgramCache]: Analyzing trace with hash -836856805, now seen corresponding path program 8 times [2024-05-12 10:55:16,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:16,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867566873] [2024-05-12 10:55:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:16,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:17,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867566873] [2024-05-12 10:55:17,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867566873] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:17,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488413346] [2024-05-12 10:55:17,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:55:17,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:17,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:17,033 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) [2024-05-12 10:55:17,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-05-12 10:55:17,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:55:17,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:17,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:17,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:17,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488413346] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:17,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:17,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-05-12 10:55:17,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075866509] [2024-05-12 10:55:17,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:55:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:17,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:55:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:55:17,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:17,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 635 transitions, 11445 flow. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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) [2024-05-12 10:55:17,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:17,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:17,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:18,844 INFO L124 PetriNetUnfolderBase]: 4819/8155 cut-off events. [2024-05-12 10:55:18,844 INFO L125 PetriNetUnfolderBase]: For 109723/109765 co-relation queries the response was YES. [2024-05-12 10:55:18,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57370 conditions, 8155 events. 4819/8155 cut-off events. For 109723/109765 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 53419 event pairs, 910 based on Foata normal form. 57/8158 useless extension candidates. Maximal degree in co-relation 57304. Up to 3471 conditions per place. [2024-05-12 10:55:18,925 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 344 selfloop transitions, 338 changer transitions 5/692 dead transitions. [2024-05-12 10:55:18,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 692 transitions, 13150 flow [2024-05-12 10:55:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:55:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:55:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 167 transitions. [2024-05-12 10:55:18,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41133004926108374 [2024-05-12 10:55:18,926 INFO L175 Difference]: Start difference. First operand has 240 places, 635 transitions, 11445 flow. Second operand 14 states and 167 transitions. [2024-05-12 10:55:18,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 692 transitions, 13150 flow [2024-05-12 10:55:20,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 692 transitions, 12947 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-05-12 10:55:20,351 INFO L231 Difference]: Finished difference. Result has 246 places, 633 transitions, 11902 flow [2024-05-12 10:55:20,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11206, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11902, PETRI_PLACES=246, PETRI_TRANSITIONS=633} [2024-05-12 10:55:20,352 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 215 predicate places. [2024-05-12 10:55:20,352 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 633 transitions, 11902 flow [2024-05-12 10:55:20,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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) [2024-05-12 10:55:20,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:20,353 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, 1, 1, 1] [2024-05-12 10:55:20,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:20,568 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,SelfDestructingSolverStorable12 [2024-05-12 10:55:20,568 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:20,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:20,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1791643133, now seen corresponding path program 9 times [2024-05-12 10:55:20,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:20,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029418104] [2024-05-12 10:55:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:20,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:20,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:20,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029418104] [2024-05-12 10:55:20,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029418104] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:20,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966316083] [2024-05-12 10:55:20,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 10:55:20,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:20,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:20,704 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) [2024-05-12 10:55:20,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-05-12 10:55:20,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-05-12 10:55:20,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:20,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:20,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:20,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:20,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966316083] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:20,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:20,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-05-12 10:55:20,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811497371] [2024-05-12 10:55:20,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:20,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:55:20,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:55:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:55:20,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:20,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 633 transitions, 11902 flow. Second operand has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 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) [2024-05-12 10:55:20,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:20,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:20,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:24,027 INFO L124 PetriNetUnfolderBase]: 6771/11546 cut-off events. [2024-05-12 10:55:24,028 INFO L125 PetriNetUnfolderBase]: For 162741/162795 co-relation queries the response was YES. [2024-05-12 10:55:24,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83700 conditions, 11546 events. 6771/11546 cut-off events. For 162741/162795 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 80306 event pairs, 580 based on Foata normal form. 182/11620 useless extension candidates. Maximal degree in co-relation 83633. Up to 2405 conditions per place. [2024-05-12 10:55:24,197 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 405 selfloop transitions, 721 changer transitions 1/1132 dead transitions. [2024-05-12 10:55:24,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1132 transitions, 21716 flow [2024-05-12 10:55:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-05-12 10:55:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-05-12 10:55:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 478 transitions. [2024-05-12 10:55:24,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38331996792301526 [2024-05-12 10:55:24,201 INFO L175 Difference]: Start difference. First operand has 246 places, 633 transitions, 11902 flow. Second operand 43 states and 478 transitions. [2024-05-12 10:55:24,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1132 transitions, 21716 flow [2024-05-12 10:55:26,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1132 transitions, 20950 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-05-12 10:55:26,037 INFO L231 Difference]: Finished difference. Result has 295 places, 926 transitions, 20018 flow [2024-05-12 10:55:26,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11379, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=20018, PETRI_PLACES=295, PETRI_TRANSITIONS=926} [2024-05-12 10:55:26,038 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 264 predicate places. [2024-05-12 10:55:26,038 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 926 transitions, 20018 flow [2024-05-12 10:55:26,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.133333333333334) internal successors, (107), 15 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) [2024-05-12 10:55:26,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:26,039 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, 1, 1, 1] [2024-05-12 10:55:26,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:26,241 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,SelfDestructingSolverStorable13 [2024-05-12 10:55:26,241 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:26,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:26,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1466904465, now seen corresponding path program 10 times [2024-05-12 10:55:26,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:26,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162970122] [2024-05-12 10:55:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:26,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:26,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:26,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162970122] [2024-05-12 10:55:26,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162970122] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:26,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093922817] [2024-05-12 10:55:26,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 10:55:26,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:26,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:26,343 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) [2024-05-12 10:55:26,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-05-12 10:55:26,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 10:55:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:26,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:26,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:26,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:26,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093922817] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:26,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:26,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-05-12 10:55:26,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918121276] [2024-05-12 10:55:26,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:26,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:55:26,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:26,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:55:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:55:26,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:26,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 926 transitions, 20018 flow. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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) [2024-05-12 10:55:26,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:26,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:26,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:29,810 INFO L124 PetriNetUnfolderBase]: 6925/11788 cut-off events. [2024-05-12 10:55:29,811 INFO L125 PetriNetUnfolderBase]: For 210558/210603 co-relation queries the response was YES. [2024-05-12 10:55:29,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93630 conditions, 11788 events. 6925/11788 cut-off events. For 210558/210603 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 82000 event pairs, 2704 based on Foata normal form. 60/11744 useless extension candidates. Maximal degree in co-relation 93544. Up to 9135 conditions per place. [2024-05-12 10:55:29,931 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 839 selfloop transitions, 161 changer transitions 10/1015 dead transitions. [2024-05-12 10:55:29,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1015 transitions, 23237 flow [2024-05-12 10:55:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:55:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:55:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 146 transitions. [2024-05-12 10:55:29,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35960591133004927 [2024-05-12 10:55:29,932 INFO L175 Difference]: Start difference. First operand has 295 places, 926 transitions, 20018 flow. Second operand 14 states and 146 transitions. [2024-05-12 10:55:29,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1015 transitions, 23237 flow [2024-05-12 10:55:33,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1015 transitions, 22982 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-05-12 10:55:33,322 INFO L231 Difference]: Finished difference. Result has 305 places, 956 transitions, 21044 flow [2024-05-12 10:55:33,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=19774, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=778, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21044, PETRI_PLACES=305, PETRI_TRANSITIONS=956} [2024-05-12 10:55:33,324 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 274 predicate places. [2024-05-12 10:55:33,324 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 956 transitions, 21044 flow [2024-05-12 10:55:33,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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) [2024-05-12 10:55:33,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:33,324 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, 1, 1, 1] [2024-05-12 10:55:33,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:33,535 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,SelfDestructingSolverStorable14 [2024-05-12 10:55:33,535 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:33,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1091828625, now seen corresponding path program 11 times [2024-05-12 10:55:33,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:33,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120204051] [2024-05-12 10:55:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:33,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:33,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:33,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120204051] [2024-05-12 10:55:33,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120204051] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:33,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521463738] [2024-05-12 10:55:33,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 10:55:33,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:33,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:33,630 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) [2024-05-12 10:55:33,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-05-12 10:55:33,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-05-12 10:55:33,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:33,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:33,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:33,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:33,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521463738] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:33,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:33,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-05-12 10:55:33,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417446867] [2024-05-12 10:55:33,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:33,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:55:33,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:55:33,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:55:33,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:33,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 956 transitions, 21044 flow. Second operand has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 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) [2024-05-12 10:55:33,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:33,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:33,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:39,435 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 [] [2024-05-12 10:55:43,022 INFO L124 PetriNetUnfolderBase]: 9819/16683 cut-off events. [2024-05-12 10:55:43,023 INFO L125 PetriNetUnfolderBase]: For 310900/310966 co-relation queries the response was YES. [2024-05-12 10:55:43,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134645 conditions, 16683 events. 9819/16683 cut-off events. For 310900/310966 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 120351 event pairs, 1440 based on Foata normal form. 229/16759 useless extension candidates. Maximal degree in co-relation 134551. Up to 5305 conditions per place. [2024-05-12 10:55:43,244 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 827 selfloop transitions, 735 changer transitions 1/1568 dead transitions. [2024-05-12 10:55:43,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 1568 transitions, 35748 flow [2024-05-12 10:55:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-05-12 10:55:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-05-12 10:55:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 411 transitions. [2024-05-12 10:55:43,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3936781609195402 [2024-05-12 10:55:43,246 INFO L175 Difference]: Start difference. First operand has 305 places, 956 transitions, 21044 flow. Second operand 36 states and 411 transitions. [2024-05-12 10:55:43,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 1568 transitions, 35748 flow [2024-05-12 10:55:50,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1568 transitions, 35632 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-05-12 10:55:50,071 INFO L231 Difference]: Finished difference. Result has 352 places, 1306 transitions, 32331 flow [2024-05-12 10:55:50,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=20890, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=32331, PETRI_PLACES=352, PETRI_TRANSITIONS=1306} [2024-05-12 10:55:50,072 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 321 predicate places. [2024-05-12 10:55:50,072 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1306 transitions, 32331 flow [2024-05-12 10:55:50,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.866666666666666) internal successors, (103), 15 states have internal predecessors, (103), 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) [2024-05-12 10:55:50,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:55:50,072 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, 1, 1, 1] [2024-05-12 10:55:50,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-05-12 10:55:50,283 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,SelfDestructingSolverStorable15 [2024-05-12 10:55:50,284 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:55:50,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:55:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2129962961, now seen corresponding path program 12 times [2024-05-12 10:55:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:55:50,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813534230] [2024-05-12 10:55:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:55:50,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:55:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:55:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:50,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:55:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813534230] [2024-05-12 10:55:50,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813534230] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:55:50,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175966328] [2024-05-12 10:55:50,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 10:55:50,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:55:50,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:55:50,375 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) [2024-05-12 10:55:50,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-05-12 10:55:50,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-05-12 10:55:50,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:55:50,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:55:50,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:55:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:50,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:55:50,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:55:50,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175966328] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:55:50,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:55:50,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-05-12 10:55:50,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816995359] [2024-05-12 10:55:50,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:55:50,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-05-12 10:55:50,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:55:50,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-05-12 10:55:50,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-05-12 10:55:50,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:55:50,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1306 transitions, 32331 flow. Second operand has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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) [2024-05-12 10:55:50,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:55:50,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:55:50,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:55:58,277 INFO L124 PetriNetUnfolderBase]: 10890/18435 cut-off events. [2024-05-12 10:55:58,277 INFO L125 PetriNetUnfolderBase]: For 440297/440378 co-relation queries the response was YES. [2024-05-12 10:55:58,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161604 conditions, 18435 events. 10890/18435 cut-off events. For 440297/440378 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 135372 event pairs, 1429 based on Foata normal form. 145/18406 useless extension candidates. Maximal degree in co-relation 161493. Up to 7013 conditions per place. [2024-05-12 10:55:58,525 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 582 selfloop transitions, 937 changer transitions 7/1531 dead transitions. [2024-05-12 10:55:58,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 1531 transitions, 39747 flow [2024-05-12 10:55:58,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-05-12 10:55:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-05-12 10:55:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 229 transitions. [2024-05-12 10:55:58,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39482758620689656 [2024-05-12 10:55:58,527 INFO L175 Difference]: Start difference. First operand has 352 places, 1306 transitions, 32331 flow. Second operand 20 states and 229 transitions. [2024-05-12 10:55:58,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 1531 transitions, 39747 flow [2024-05-12 10:56:07,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1531 transitions, 39377 flow, removed 125 selfloop flow, removed 4 redundant places. [2024-05-12 10:56:07,524 INFO L231 Difference]: Finished difference. Result has 378 places, 1449 transitions, 39368 flow [2024-05-12 10:56:07,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=31923, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=39368, PETRI_PLACES=378, PETRI_TRANSITIONS=1449} [2024-05-12 10:56:07,525 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 347 predicate places. [2024-05-12 10:56:07,525 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1449 transitions, 39368 flow [2024-05-12 10:56:07,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.733333333333333) internal successors, (101), 15 states have internal predecessors, (101), 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) [2024-05-12 10:56:07,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:56:07,526 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, 1, 1, 1] [2024-05-12 10:56:07,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-05-12 10:56:07,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:56:07,727 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:56:07,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:56:07,727 INFO L85 PathProgramCache]: Analyzing trace with hash 777606251, now seen corresponding path program 13 times [2024-05-12 10:56:07,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:56:07,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618436257] [2024-05-12 10:56:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:56:07,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:56:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:56:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:56:07,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618436257] [2024-05-12 10:56:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618436257] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:56:07,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903385528] [2024-05-12 10:56:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 10:56:07,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:56:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:56:07,842 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) [2024-05-12 10:56:07,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-05-12 10:56:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:56:07,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:56:07,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:56:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:07,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:56:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:08,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903385528] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:56:08,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:56:08,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-05-12 10:56:08,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428901752] [2024-05-12 10:56:08,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:56:08,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-05-12 10:56:08,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:56:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-05-12 10:56:08,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-05-12 10:56:08,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:56:08,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1449 transitions, 39368 flow. Second operand has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 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) [2024-05-12 10:56:08,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:56:08,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:56:08,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:56:17,497 INFO L124 PetriNetUnfolderBase]: 13851/23194 cut-off events. [2024-05-12 10:56:17,498 INFO L125 PetriNetUnfolderBase]: For 683786/683897 co-relation queries the response was YES. [2024-05-12 10:56:17,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217652 conditions, 23194 events. 13851/23194 cut-off events. For 683786/683897 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 173555 event pairs, 3685 based on Foata normal form. 132/23129 useless extension candidates. Maximal degree in co-relation 217530. Up to 13577 conditions per place. [2024-05-12 10:56:17,918 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 1109 selfloop transitions, 835 changer transitions 0/1949 dead transitions. [2024-05-12 10:56:17,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1949 transitions, 55151 flow [2024-05-12 10:56:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-05-12 10:56:17,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-05-12 10:56:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 252 transitions. [2024-05-12 10:56:17,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3949843260188088 [2024-05-12 10:56:17,921 INFO L175 Difference]: Start difference. First operand has 378 places, 1449 transitions, 39368 flow. Second operand 22 states and 252 transitions. [2024-05-12 10:56:17,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1949 transitions, 55151 flow [2024-05-12 10:56:32,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1949 transitions, 54743 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-05-12 10:56:32,154 INFO L231 Difference]: Finished difference. Result has 401 places, 1836 transitions, 52481 flow [2024-05-12 10:56:32,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=38980, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=52481, PETRI_PLACES=401, PETRI_TRANSITIONS=1836} [2024-05-12 10:56:32,156 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 370 predicate places. [2024-05-12 10:56:32,156 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1836 transitions, 52481 flow [2024-05-12 10:56:32,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 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) [2024-05-12 10:56:32,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:56:32,157 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, 1, 1, 1] [2024-05-12 10:56:32,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-05-12 10:56:32,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-05-12 10:56:32,368 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:56:32,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:56:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash 160469479, now seen corresponding path program 14 times [2024-05-12 10:56:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:56:32,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332456535] [2024-05-12 10:56:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:56:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:56:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:56:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:32,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:56:32,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332456535] [2024-05-12 10:56:32,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332456535] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:56:32,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151533398] [2024-05-12 10:56:32,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 10:56:32,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:56:32,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:56:32,470 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) [2024-05-12 10:56:32,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-05-12 10:56:32,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 10:56:32,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:56:32,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:56:32,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:56:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:32,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:56:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151533398] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:56:32,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:56:32,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-05-12 10:56:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044447901] [2024-05-12 10:56:32,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:56:32,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-05-12 10:56:32,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:56:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-05-12 10:56:32,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-05-12 10:56:32,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:56:32,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1836 transitions, 52481 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:32,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:56:32,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:56:32,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:56:43,225 INFO L124 PetriNetUnfolderBase]: 13884/23248 cut-off events. [2024-05-12 10:56:43,226 INFO L125 PetriNetUnfolderBase]: For 743959/744061 co-relation queries the response was YES. [2024-05-12 10:56:43,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227943 conditions, 23248 events. 13884/23248 cut-off events. For 743959/744061 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 174317 event pairs, 4284 based on Foata normal form. 117/23168 useless extension candidates. Maximal degree in co-relation 227812. Up to 15469 conditions per place. [2024-05-12 10:56:43,844 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 1294 selfloop transitions, 588 changer transitions 5/1892 dead transitions. [2024-05-12 10:56:43,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1892 transitions, 56767 flow [2024-05-12 10:56:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:56:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:56:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 158 transitions. [2024-05-12 10:56:43,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891625615763547 [2024-05-12 10:56:43,854 INFO L175 Difference]: Start difference. First operand has 401 places, 1836 transitions, 52481 flow. Second operand 14 states and 158 transitions. [2024-05-12 10:56:43,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1892 transitions, 56767 flow [2024-05-12 10:56:59,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1892 transitions, 56279 flow, removed 159 selfloop flow, removed 6 redundant places. [2024-05-12 10:56:59,234 INFO L231 Difference]: Finished difference. Result has 410 places, 1836 transitions, 53219 flow [2024-05-12 10:56:59,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=51958, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=53219, PETRI_PLACES=410, PETRI_TRANSITIONS=1836} [2024-05-12 10:56:59,237 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 379 predicate places. [2024-05-12 10:56:59,238 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 1836 transitions, 53219 flow [2024-05-12 10:56:59,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:59,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:56:59,238 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, 1, 1, 1] [2024-05-12 10:56:59,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-05-12 10:56:59,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:56:59,449 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:56:59,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:56:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash 272818731, now seen corresponding path program 15 times [2024-05-12 10:56:59,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:56:59,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760014934] [2024-05-12 10:56:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:56:59,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:56:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:56:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:59,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:56:59,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760014934] [2024-05-12 10:56:59,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760014934] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:56:59,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135605511] [2024-05-12 10:56:59,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 10:56:59,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:56:59,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:56:59,544 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) [2024-05-12 10:56:59,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-05-12 10:56:59,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-05-12 10:56:59,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:56:59,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2024-05-12 10:56:59,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:56:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:59,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:56:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:56:59,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135605511] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:56:59,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:56:59,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-05-12 10:56:59,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058369941] [2024-05-12 10:56:59,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:56:59,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-05-12 10:56:59,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:56:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-05-12 10:56:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-05-12 10:56:59,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-05-12 10:56:59,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1836 transitions, 53219 flow. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:56:59,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:56:59,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-05-12 10:56:59,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:57:06,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-05-12 10:57:21,578 INFO L124 PetriNetUnfolderBase]: 20230/33713 cut-off events. [2024-05-12 10:57:21,578 INFO L125 PetriNetUnfolderBase]: For 1104365/1104530 co-relation queries the response was YES. [2024-05-12 10:57:22,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334017 conditions, 33713 events. 20230/33713 cut-off events. For 1104365/1104530 co-relation queries the response was YES. Maximal size of possible extension queue 1065. Compared 261004 event pairs, 1824 based on Foata normal form. 388/33781 useless extension candidates. Maximal degree in co-relation 333883. Up to 7802 conditions per place. [2024-05-12 10:57:22,620 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 768 selfloop transitions, 1982 changer transitions 6/2761 dead transitions. [2024-05-12 10:57:22,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 2761 transitions, 84246 flow [2024-05-12 10:57:22,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-05-12 10:57:22,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-05-12 10:57:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 357 transitions. [2024-05-12 10:57:22,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3971078976640712 [2024-05-12 10:57:22,626 INFO L175 Difference]: Start difference. First operand has 410 places, 1836 transitions, 53219 flow. Second operand 31 states and 357 transitions. [2024-05-12 10:57:22,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 2761 transitions, 84246 flow [2024-05-12 10:57:49,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 2761 transitions, 82634 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-05-12 10:57:49,260 INFO L231 Difference]: Finished difference. Result has 439 places, 2607 transitions, 82766 flow [2024-05-12 10:57:49,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=51763, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=82766, PETRI_PLACES=439, PETRI_TRANSITIONS=2607} [2024-05-12 10:57:49,262 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 408 predicate places. [2024-05-12 10:57:49,262 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 2607 transitions, 82766 flow [2024-05-12 10:57:49,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 16 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:57:49,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:57:49,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:57:49,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-05-12 10:57:49,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:57:49,465 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 10:57:49,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:57:49,466 INFO L85 PathProgramCache]: Analyzing trace with hash -95707994, now seen corresponding path program 16 times [2024-05-12 10:57:49,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:57:49,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511957916] [2024-05-12 10:57:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:57:49,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:57:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:57:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 10:57:49,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:57:49,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511957916] [2024-05-12 10:57:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511957916] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 10:57:49,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008860466] [2024-05-12 10:57:49,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 10:57:49,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 10:57:49,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:57:49,557 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) [2024-05-12 10:57:49,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-05-12 10:57:49,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 10:57:49,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 10:57:49,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2024-05-12 10:57:49,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 10:57:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:57:49,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 10:57:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 10:57:49,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008860466] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 10:57:49,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 10:57:49,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2024-05-12 10:57:49,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728458595] [2024-05-12 10:57:49,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 10:57:49,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:57:49,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:57:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:57:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:57:49,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-05-12 10:57:49,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 2607 transitions, 82766 flow. Second operand has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 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) [2024-05-12 10:57:49,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:57:49,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-05-12 10:57:49,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand