./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-three-array-min.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-three-array-min.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-three-array-min.wvr.c ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-three-array-min.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 11:04:10,988 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 11:04:11,064 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 11:04:11,070 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 11:04:11,070 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 11:04:11,115 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 11:04:11,117 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 11:04:11,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 11:04:11,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 11:04:11,120 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 11:04:11,121 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 11:04:11,121 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 11:04:11,121 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 11:04:11,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 11:04:11,122 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 11:04:11,122 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 11:04:11,123 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 11:04:11,123 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 11:04:11,123 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 11:04:11,123 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 11:04:11,124 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 11:04:11,124 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 11:04:11,124 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 11:04:11,125 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 11:04:11,125 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 11:04:11,125 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 11:04:11,125 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 11:04:11,125 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 11:04:11,126 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 11:04:11,126 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 11:04:11,126 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 11:04:11,127 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 11:04:11,127 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:04:11,127 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 11:04:11,127 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 11:04:11,128 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 11:04:11,128 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 11:04:11,128 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 11:04:11,128 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 11:04:11,128 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 11:04:11,129 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 11:04:11,129 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 11:04:11,129 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 11:04:11,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 11:04:11,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 11:04:11,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 11:04:11,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 11:04:11,431 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 11:04:11,431 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 11:04:11,433 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2024-05-12 11:04:12,560 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 11:04:12,755 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 11:04:12,756 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-three-array-min.wvr.c [2024-05-12 11:04:12,763 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34271c123/db7420fe69334aa3a9dcae61daceb273/FLAGfdc42ad61 [2024-05-12 11:04:12,779 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34271c123/db7420fe69334aa3a9dcae61daceb273 [2024-05-12 11:04:12,781 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 11:04:12,782 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 11:04:12,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-three-array-min.wvr.yml/witness.yml [2024-05-12 11:04:12,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 11:04:12,898 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 11:04:12,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 11:04:12,900 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 11:04:12,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 11:04:12,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:04:12" (1/2) ... [2024-05-12 11:04:12,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16af6fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:12, skipping insertion in model container [2024-05-12 11:04:12,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:04:12" (1/2) ... [2024-05-12 11:04:12,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1be45ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:04:12, skipping insertion in model container [2024-05-12 11:04:12,908 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:04:12" (2/2) ... [2024-05-12 11:04:12,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16af6fb5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:04:12, skipping insertion in model container [2024-05-12 11:04:12,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:04:12" (2/2) ... [2024-05-12 11:04:12,911 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 11:04:12,926 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 11:04:12,927 INFO L97 edCorrectnessWitness]: Location invariant before [L107-L107] ((! multithreaded || ((0 <= p && 1 <= p) && p != 0)) && (! multithreaded || ((4294967295LL + (long long )N) - (long long )p >= 0LL && (4294967294LL - (long long )N) - (long long )p >= 0LL))) && (! multithreaded || (0 <= p && p != 0)) [2024-05-12 11:04:12,927 INFO L97 edCorrectnessWitness]: Location invariant before [L108-L108] ((! multithreaded || ((0 <= p && 1 <= p) && p != 0)) && (! multithreaded || ((4294967295LL + (long long )N) - (long long )p >= 0LL && (4294967294LL - (long long )N) - (long long )p >= 0LL))) && (! multithreaded || (0 <= p && p != 0)) [2024-05-12 11:04:12,927 INFO L97 edCorrectnessWitness]: Location invariant before [L109-L109] ((! multithreaded || ((0 <= p && 1 <= p) && p != 0)) && (! multithreaded || ((4294967295LL + (long long )N) - (long long )p >= 0LL && (4294967294LL - (long long )N) - (long long )p >= 0LL))) && (! multithreaded || (0 <= p && p != 0)) [2024-05-12 11:04:12,927 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 11:04:12,928 INFO L106 edCorrectnessWitness]: ghost_update [L106-L106] multithreaded = 1; [2024-05-12 11:04:12,949 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 11:04:13,137 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-three-array-min.wvr.c[2815,2828] [2024-05-12 11:04:13,146 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:04:13,154 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 11:04:13,211 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-three-array-min.wvr.c[2815,2828] [2024-05-12 11:04:13,217 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:04:13,237 INFO L206 MainTranslator]: Completed translation [2024-05-12 11:04:13,238 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:04:13 WrapperNode [2024-05-12 11:04:13,238 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 11:04:13,240 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 11:04:13,240 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 11:04:13,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 11:04:13,250 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,265 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,293 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 245 [2024-05-12 11:04:13,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 11:04:13,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 11:04:13,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 11:04:13,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 11:04:13,303 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,303 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,307 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,333 INFO L175 MemorySlicer]: Split 24 memory accesses to 5 slices as follows [2, 16, 2, 2, 2]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 4, 1, 1, 1]. [2024-05-12 11:04:13,333 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,334 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,343 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,347 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,349 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,351 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,364 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 11:04:13,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 11:04:13,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 11:04:13,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 11:04:13,372 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 11:04:13" (1/1) ... [2024-05-12 11:04:13,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:04:13,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:13,405 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 11:04:13,419 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 11:04:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 11:04:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 11:04:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 11:04:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 11:04:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 11:04:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 11:04:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 11:04:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 11:04:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 11:04:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 11:04:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-05-12 11:04:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-05-12 11:04:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 11:04:13,466 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 11:04:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 11:04:13,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 11:04:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-05-12 11:04:13,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-05-12 11:04:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 11:04:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 11:04:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 11:04:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 11:04:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 11:04:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 11:04:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 11:04:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-05-12 11:04:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 11:04:13,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 11:04:13,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 11:04:13,470 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 11:04:13,575 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 11:04:13,576 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 11:04:14,042 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 11:04:14,042 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 11:04:14,439 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 11:04:14,439 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-05-12 11:04:14,440 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:04:14 BoogieIcfgContainer [2024-05-12 11:04:14,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 11:04:14,444 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 11:04:14,444 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 11:04:14,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 11:04:14,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 11:04:12" (1/4) ... [2024-05-12 11:04:14,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf5d779 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:04:14, skipping insertion in model container [2024-05-12 11:04:14,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:04:12" (2/4) ... [2024-05-12 11:04:14,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf5d779 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:04:14, skipping insertion in model container [2024-05-12 11:04:14,450 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 11:04:13" (3/4) ... [2024-05-12 11:04:14,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf5d779 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:04:14, skipping insertion in model container [2024-05-12 11:04:14,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:04:14" (4/4) ... [2024-05-12 11:04:14,451 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2024-05-12 11:04:14,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 11:04:14,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 11:04:14,469 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 11:04:14,517 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-05-12 11:04:14,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 49 transitions, 119 flow [2024-05-12 11:04:14,611 INFO L124 PetriNetUnfolderBase]: 7/46 cut-off events. [2024-05-12 11:04:14,611 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-05-12 11:04:14,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 7/46 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-05-12 11:04:14,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 49 transitions, 119 flow [2024-05-12 11:04:14,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 45 transitions, 108 flow [2024-05-12 11:04:14,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 11:04:14,637 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;@34c97e71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 11:04:14,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 11:04:14,646 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 11:04:14,646 INFO L124 PetriNetUnfolderBase]: 4/13 cut-off events. [2024-05-12 11:04:14,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:04:14,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:14,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:14,648 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:14,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:14,653 INFO L85 PathProgramCache]: Analyzing trace with hash 392094979, now seen corresponding path program 1 times [2024-05-12 11:04:14,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:14,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601517672] [2024-05-12 11:04:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:14,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:15,014 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 11:04:15,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:15,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601517672] [2024-05-12 11:04:15,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601517672] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:15,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:04:15,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 11:04:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321976475] [2024-05-12 11:04:15,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:15,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 11:04:15,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 11:04:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 11:04:15,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-05-12 11:04:15,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 11:04:15,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:15,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-05-12 11:04:15,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:15,368 INFO L124 PetriNetUnfolderBase]: 696/1176 cut-off events. [2024-05-12 11:04:15,368 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-05-12 11:04:15,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2111 conditions, 1176 events. 696/1176 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5535 event pairs, 346 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 1756. Up to 877 conditions per place. [2024-05-12 11:04:15,384 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 31 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-05-12 11:04:15,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 176 flow [2024-05-12 11:04:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:04:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:04:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-05-12 11:04:15,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-05-12 11:04:15,403 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 108 flow. Second operand 3 states and 82 transitions. [2024-05-12 11:04:15,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 176 flow [2024-05-12 11:04:15,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 11:04:15,415 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 108 flow [2024-05-12 11:04:15,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2024-05-12 11:04:15,423 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2024-05-12 11:04:15,423 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 108 flow [2024-05-12 11:04:15,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 11:04:15,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:15,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:15,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 11:04:15,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:15,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:15,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1821455312, now seen corresponding path program 1 times [2024-05-12 11:04:15,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:15,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443939661] [2024-05-12 11:04:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:15,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:15,650 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 11:04:15,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:15,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443939661] [2024-05-12 11:04:15,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443939661] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:15,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434714688] [2024-05-12 11:04:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:15,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:15,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:15,655 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 11:04:15,680 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 11:04:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:15,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2024-05-12 11:04:15,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 11:04:15,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 11:04:15,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434714688] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:15,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-05-12 11:04:15,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-05-12 11:04:15,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085828816] [2024-05-12 11:04:15,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:15,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 11:04:15,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:15,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 11:04:15,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 11:04:15,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-05-12 11:04:15,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 11:04:15,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:15,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-05-12 11:04:15,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:16,082 INFO L124 PetriNetUnfolderBase]: 696/1178 cut-off events. [2024-05-12 11:04:16,083 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-05-12 11:04:16,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2082 conditions, 1178 events. 696/1178 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5580 event pairs, 346 based on Foata normal form. 0/959 useless extension candidates. Maximal degree in co-relation 2071. Up to 876 conditions per place. [2024-05-12 11:04:16,092 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 29 selfloop transitions, 6 changer transitions 0/48 dead transitions. [2024-05-12 11:04:16,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 182 flow [2024-05-12 11:04:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 11:04:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 11:04:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-05-12 11:04:16,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153061224489796 [2024-05-12 11:04:16,095 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 108 flow. Second operand 4 states and 101 transitions. [2024-05-12 11:04:16,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 182 flow [2024-05-12 11:04:16,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 178 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 11:04:16,097 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 132 flow [2024-05-12 11:04:16,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2024-05-12 11:04:16,100 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2024-05-12 11:04:16,100 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 132 flow [2024-05-12 11:04:16,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 11:04:16,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:16,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:16,120 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 11:04:16,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:16,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:16,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:16,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1806272147, now seen corresponding path program 1 times [2024-05-12 11:04:16,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:16,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751621589] [2024-05-12 11:04:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:16,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:04:16,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:16,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751621589] [2024-05-12 11:04:16,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751621589] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:16,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:04:16,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:04:16,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990163141] [2024-05-12 11:04:16,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:16,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 11:04:16,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:16,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 11:04:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 11:04:16,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 11:04:16,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 11:04:16,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:16,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 11:04:16,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:16,803 INFO L124 PetriNetUnfolderBase]: 969/1499 cut-off events. [2024-05-12 11:04:16,804 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-05-12 11:04:16,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2817 conditions, 1499 events. 969/1499 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7087 event pairs, 190 based on Foata normal form. 0/1190 useless extension candidates. Maximal degree in co-relation 2797. Up to 901 conditions per place. [2024-05-12 11:04:16,816 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 51 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-05-12 11:04:16,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 280 flow [2024-05-12 11:04:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 11:04:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 11:04:16,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-05-12 11:04:16,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-05-12 11:04:16,822 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 132 flow. Second operand 5 states and 120 transitions. [2024-05-12 11:04:16,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 280 flow [2024-05-12 11:04:16,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:04:16,825 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 147 flow [2024-05-12 11:04:16,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-05-12 11:04:16,827 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2024-05-12 11:04:16,827 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 147 flow [2024-05-12 11:04:16,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 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 11:04:16,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:16,828 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 11:04:16,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 11:04:16,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:16,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:16,829 INFO L85 PathProgramCache]: Analyzing trace with hash 561990041, now seen corresponding path program 1 times [2024-05-12 11:04:16,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:16,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378651713] [2024-05-12 11:04:16,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:16,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:04:16,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:16,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378651713] [2024-05-12 11:04:16,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378651713] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:16,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907664839] [2024-05-12 11:04:16,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:16,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:16,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:16,976 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 11:04:16,997 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 11:04:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:17,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 7 conjunts are in the unsatisfiable core [2024-05-12 11:04:17,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:04:17,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:04:17,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907664839] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:17,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:17,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-05-12 11:04:17,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616032943] [2024-05-12 11:04:17,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:17,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-05-12 11:04:17,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:17,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-05-12 11:04:17,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-05-12 11:04:17,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 11:04:17,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 147 flow. Second operand has 12 states, 12 states have (on average 16.25) internal successors, (195), 12 states have internal predecessors, (195), 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 11:04:17,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:17,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 11:04:17,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:17,766 INFO L124 PetriNetUnfolderBase]: 1848/2995 cut-off events. [2024-05-12 11:04:17,766 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-05-12 11:04:17,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5662 conditions, 2995 events. 1848/2995 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 16167 event pairs, 951 based on Foata normal form. 0/2310 useless extension candidates. Maximal degree in co-relation 4293. Up to 1795 conditions per place. [2024-05-12 11:04:17,815 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 68 selfloop transitions, 18 changer transitions 0/96 dead transitions. [2024-05-12 11:04:17,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 96 transitions, 461 flow [2024-05-12 11:04:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 11:04:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 11:04:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 11:04:17,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5051020408163265 [2024-05-12 11:04:17,823 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 147 flow. Second operand 8 states and 198 transitions. [2024-05-12 11:04:17,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 96 transitions, 461 flow [2024-05-12 11:04:17,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 450 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 11:04:17,831 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 257 flow [2024-05-12 11:04:17,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=257, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2024-05-12 11:04:17,832 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2024-05-12 11:04:17,833 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 257 flow [2024-05-12 11:04:17,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.25) internal successors, (195), 12 states have internal predecessors, (195), 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 11:04:17,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:17,835 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:17,853 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 11:04:18,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-05-12 11:04:18,051 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:18,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1655512273, now seen corresponding path program 2 times [2024-05-12 11:04:18,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:18,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740906847] [2024-05-12 11:04:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:18,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 11:04:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:18,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740906847] [2024-05-12 11:04:18,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740906847] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:18,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847187639] [2024-05-12 11:04:18,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:04:18,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:18,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:18,271 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 11:04:18,274 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 11:04:18,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-05-12 11:04:18,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:18,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2024-05-12 11:04:18,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-05-12 11:04:18,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-05-12 11:04:18,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847187639] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:18,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-05-12 11:04:18,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2024-05-12 11:04:18,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39603772] [2024-05-12 11:04:18,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:18,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 11:04:18,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 11:04:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-05-12 11:04:18,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-05-12 11:04:18,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 11:04:18,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:18,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-05-12 11:04:18,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:19,032 INFO L124 PetriNetUnfolderBase]: 2597/3841 cut-off events. [2024-05-12 11:04:19,033 INFO L125 PetriNetUnfolderBase]: For 479/479 co-relation queries the response was YES. [2024-05-12 11:04:19,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8242 conditions, 3841 events. 2597/3841 cut-off events. For 479/479 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 20188 event pairs, 661 based on Foata normal form. 60/3017 useless extension candidates. Maximal degree in co-relation 6612. Up to 1964 conditions per place. [2024-05-12 11:04:19,060 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 101 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2024-05-12 11:04:19,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 118 transitions, 613 flow [2024-05-12 11:04:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 11:04:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 11:04:19,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-05-12 11:04:19,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131195335276968 [2024-05-12 11:04:19,062 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 257 flow. Second operand 7 states and 176 transitions. [2024-05-12 11:04:19,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 118 transitions, 613 flow [2024-05-12 11:04:19,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 118 transitions, 592 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-05-12 11:04:19,066 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 293 flow [2024-05-12 11:04:19,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-05-12 11:04:19,067 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 18 predicate places. [2024-05-12 11:04:19,067 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 293 flow [2024-05-12 11:04:19,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 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 11:04:19,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:19,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:19,087 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 11:04:19,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:19,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:19,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash -254993691, now seen corresponding path program 1 times [2024-05-12 11:04:19,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:19,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532072062] [2024-05-12 11:04:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:19,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 11:04:19,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:19,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532072062] [2024-05-12 11:04:19,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532072062] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:19,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718773408] [2024-05-12 11:04:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:19,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:19,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:19,524 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 11:04:19,542 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 11:04:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:19,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 11:04:19,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 11:04:19,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-05-12 11:04:19,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718773408] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:19,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:19,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-05-12 11:04:19,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702586498] [2024-05-12 11:04:19,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:19,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-05-12 11:04:19,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:19,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-05-12 11:04:19,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-05-12 11:04:19,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 11:04:19,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 293 flow. Second operand has 17 states, 17 states have (on average 16.235294117647058) internal successors, (276), 17 states have internal predecessors, (276), 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 11:04:19,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:19,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 11:04:19,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:20,711 INFO L124 PetriNetUnfolderBase]: 3663/5927 cut-off events. [2024-05-12 11:04:20,711 INFO L125 PetriNetUnfolderBase]: For 2533/2566 co-relation queries the response was YES. [2024-05-12 11:04:20,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13422 conditions, 5927 events. 3663/5927 cut-off events. For 2533/2566 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 35853 event pairs, 1619 based on Foata normal form. 0/4655 useless extension candidates. Maximal degree in co-relation 7565. Up to 2643 conditions per place. [2024-05-12 11:04:20,748 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 86 selfloop transitions, 40 changer transitions 0/136 dead transitions. [2024-05-12 11:04:20,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 136 transitions, 813 flow [2024-05-12 11:04:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 11:04:20,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 11:04:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-05-12 11:04:20,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4935064935064935 [2024-05-12 11:04:20,750 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 293 flow. Second operand 11 states and 266 transitions. [2024-05-12 11:04:20,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 136 transitions, 813 flow [2024-05-12 11:04:20,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 136 transitions, 792 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-05-12 11:04:20,762 INFO L231 Difference]: Finished difference. Result has 78 places, 86 transitions, 553 flow [2024-05-12 11:04:20,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=553, PETRI_PLACES=78, PETRI_TRANSITIONS=86} [2024-05-12 11:04:20,763 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 30 predicate places. [2024-05-12 11:04:20,763 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 86 transitions, 553 flow [2024-05-12 11:04:20,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.235294117647058) internal successors, (276), 17 states have internal predecessors, (276), 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 11:04:20,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:20,763 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:20,783 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 11:04:20,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:20,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:20,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:20,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1032924859, now seen corresponding path program 2 times [2024-05-12 11:04:20,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:20,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367115452] [2024-05-12 11:04:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:20,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 11:04:21,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367115452] [2024-05-12 11:04:21,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367115452] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:21,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511593177] [2024-05-12 11:04:21,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:04:21,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:21,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:21,369 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 11:04:21,372 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 11:04:21,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:04:21,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:21,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjunts are in the unsatisfiable core [2024-05-12 11:04:21,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 11:04:21,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-05-12 11:04:21,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511593177] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:21,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:21,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-05-12 11:04:21,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948966975] [2024-05-12 11:04:21,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:21,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:04:21,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:21,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:04:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:04:22,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 49 [2024-05-12 11:04:22,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 86 transitions, 553 flow. Second operand has 25 states, 25 states have (on average 13.76) internal successors, (344), 25 states have internal predecessors, (344), 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 11:04:22,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:22,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 49 [2024-05-12 11:04:22,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:24,793 INFO L124 PetriNetUnfolderBase]: 8467/12548 cut-off events. [2024-05-12 11:04:24,794 INFO L125 PetriNetUnfolderBase]: For 8767/8767 co-relation queries the response was YES. [2024-05-12 11:04:24,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30622 conditions, 12548 events. 8467/12548 cut-off events. For 8767/8767 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 74741 event pairs, 1147 based on Foata normal form. 562/10653 useless extension candidates. Maximal degree in co-relation 14155. Up to 1618 conditions per place. [2024-05-12 11:04:24,873 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 308 selfloop transitions, 70 changer transitions 14/400 dead transitions. [2024-05-12 11:04:24,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 400 transitions, 2309 flow [2024-05-12 11:04:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-05-12 11:04:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-05-12 11:04:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 813 transitions. [2024-05-12 11:04:24,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4484280198565913 [2024-05-12 11:04:24,877 INFO L175 Difference]: Start difference. First operand has 78 places, 86 transitions, 553 flow. Second operand 37 states and 813 transitions. [2024-05-12 11:04:24,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 400 transitions, 2309 flow [2024-05-12 11:04:24,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 400 transitions, 2267 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-05-12 11:04:24,920 INFO L231 Difference]: Finished difference. Result has 129 places, 112 transitions, 951 flow [2024-05-12 11:04:24,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=951, PETRI_PLACES=129, PETRI_TRANSITIONS=112} [2024-05-12 11:04:24,921 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 81 predicate places. [2024-05-12 11:04:24,921 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 112 transitions, 951 flow [2024-05-12 11:04:24,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.76) internal successors, (344), 25 states have internal predecessors, (344), 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 11:04:24,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:24,922 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, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:24,934 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 11:04:25,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:25,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:25,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:25,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1640653563, now seen corresponding path program 1 times [2024-05-12 11:04:25,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:25,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243470844] [2024-05-12 11:04:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:25,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 11:04:25,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:25,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243470844] [2024-05-12 11:04:25,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243470844] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:25,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:04:25,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:04:25,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747660864] [2024-05-12 11:04:25,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:25,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 11:04:25,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 11:04:25,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 11:04:25,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 49 [2024-05-12 11:04:25,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 112 transitions, 951 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 11:04:25,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:25,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 49 [2024-05-12 11:04:25,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:26,517 INFO L124 PetriNetUnfolderBase]: 5835/9813 cut-off events. [2024-05-12 11:04:26,518 INFO L125 PetriNetUnfolderBase]: For 18583/19442 co-relation queries the response was YES. [2024-05-12 11:04:26,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25883 conditions, 9813 events. 5835/9813 cut-off events. For 18583/19442 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 65015 event pairs, 1572 based on Foata normal form. 124/8241 useless extension candidates. Maximal degree in co-relation 24011. Up to 4314 conditions per place. [2024-05-12 11:04:26,613 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 128 selfloop transitions, 2 changer transitions 1/148 dead transitions. [2024-05-12 11:04:26,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 148 transitions, 1467 flow [2024-05-12 11:04:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:04:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:04:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-05-12 11:04:26,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-05-12 11:04:26,615 INFO L175 Difference]: Start difference. First operand has 129 places, 112 transitions, 951 flow. Second operand 3 states and 95 transitions. [2024-05-12 11:04:26,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 148 transitions, 1467 flow [2024-05-12 11:04:26,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 148 transitions, 1206 flow, removed 53 selfloop flow, removed 17 redundant places. [2024-05-12 11:04:26,677 INFO L231 Difference]: Finished difference. Result has 115 places, 113 transitions, 749 flow [2024-05-12 11:04:26,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=749, PETRI_PLACES=115, PETRI_TRANSITIONS=113} [2024-05-12 11:04:26,680 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 67 predicate places. [2024-05-12 11:04:26,680 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 113 transitions, 749 flow [2024-05-12 11:04:26,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 11:04:26,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:26,681 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:26,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 11:04:26,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:26,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:26,682 INFO L85 PathProgramCache]: Analyzing trace with hash 623579336, now seen corresponding path program 1 times [2024-05-12 11:04:26,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:26,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234844583] [2024-05-12 11:04:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:04:26,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:26,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234844583] [2024-05-12 11:04:26,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234844583] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:26,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769160210] [2024-05-12 11:04:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:26,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:26,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:26,896 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 11:04:26,918 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 11:04:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:27,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 7 conjunts are in the unsatisfiable core [2024-05-12 11:04:27,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:04:27,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:04:27,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769160210] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:27,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:27,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-05-12 11:04:27,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000660177] [2024-05-12 11:04:27,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:27,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-05-12 11:04:27,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:27,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-05-12 11:04:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-05-12 11:04:27,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 11:04:27,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 113 transitions, 749 flow. Second operand has 12 states, 12 states have (on average 17.416666666666668) internal successors, (209), 12 states have internal predecessors, (209), 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 11:04:27,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:27,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 11:04:27,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:28,545 INFO L124 PetriNetUnfolderBase]: 8159/12446 cut-off events. [2024-05-12 11:04:28,545 INFO L125 PetriNetUnfolderBase]: For 21548/22027 co-relation queries the response was YES. [2024-05-12 11:04:28,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35109 conditions, 12446 events. 8159/12446 cut-off events. For 21548/22027 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 75175 event pairs, 4261 based on Foata normal form. 130/10058 useless extension candidates. Maximal degree in co-relation 32287. Up to 8194 conditions per place. [2024-05-12 11:04:28,625 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 95 selfloop transitions, 23 changer transitions 42/174 dead transitions. [2024-05-12 11:04:28,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 174 transitions, 1332 flow [2024-05-12 11:04:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 11:04:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 11:04:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-05-12 11:04:28,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-05-12 11:04:28,627 INFO L175 Difference]: Start difference. First operand has 115 places, 113 transitions, 749 flow. Second operand 9 states and 217 transitions. [2024-05-12 11:04:28,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 174 transitions, 1332 flow [2024-05-12 11:04:28,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 174 transitions, 1330 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:04:28,690 INFO L231 Difference]: Finished difference. Result has 124 places, 100 transitions, 687 flow [2024-05-12 11:04:28,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=687, PETRI_PLACES=124, PETRI_TRANSITIONS=100} [2024-05-12 11:04:28,691 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 76 predicate places. [2024-05-12 11:04:28,691 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 100 transitions, 687 flow [2024-05-12 11:04:28,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.416666666666668) internal successors, (209), 12 states have internal predecessors, (209), 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 11:04:28,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:28,692 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:28,711 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 11:04:28,907 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 11:04:28,908 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:28,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1794261779, now seen corresponding path program 3 times [2024-05-12 11:04:28,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:28,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453007268] [2024-05-12 11:04:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:28,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-05-12 11:04:29,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:29,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453007268] [2024-05-12 11:04:29,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453007268] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:29,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719249294] [2024-05-12 11:04:29,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:04:29,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:29,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:29,229 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 11:04:29,248 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 11:04:29,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-05-12 11:04:29,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:29,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 14 conjunts are in the unsatisfiable core [2024-05-12 11:04:29,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-05-12 11:04:29,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-05-12 11:04:30,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719249294] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:30,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:30,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2024-05-12 11:04:30,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546364185] [2024-05-12 11:04:30,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:30,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-05-12 11:04:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:30,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-05-12 11:04:30,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=687, Unknown=0, NotChecked=0, Total=930 [2024-05-12 11:04:30,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 11:04:30,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 100 transitions, 687 flow. Second operand has 31 states, 31 states have (on average 16.516129032258064) internal successors, (512), 31 states have internal predecessors, (512), 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 11:04:30,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:30,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 11:04:30,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:32,882 INFO L124 PetriNetUnfolderBase]: 12822/19217 cut-off events. [2024-05-12 11:04:32,882 INFO L125 PetriNetUnfolderBase]: For 19281/19341 co-relation queries the response was YES. [2024-05-12 11:04:32,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53465 conditions, 19217 events. 12822/19217 cut-off events. For 19281/19341 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 125305 event pairs, 3978 based on Foata normal form. 192/16076 useless extension candidates. Maximal degree in co-relation 51375. Up to 5256 conditions per place. [2024-05-12 11:04:33,007 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 228 selfloop transitions, 100 changer transitions 0/338 dead transitions. [2024-05-12 11:04:33,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 338 transitions, 2435 flow [2024-05-12 11:04:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-05-12 11:04:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-05-12 11:04:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 686 transitions. [2024-05-12 11:04:33,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-05-12 11:04:33,010 INFO L175 Difference]: Start difference. First operand has 124 places, 100 transitions, 687 flow. Second operand 29 states and 686 transitions. [2024-05-12 11:04:33,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 338 transitions, 2435 flow [2024-05-12 11:04:33,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 338 transitions, 2215 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-05-12 11:04:33,235 INFO L231 Difference]: Finished difference. Result has 136 places, 161 transitions, 1291 flow [2024-05-12 11:04:33,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1291, PETRI_PLACES=136, PETRI_TRANSITIONS=161} [2024-05-12 11:04:33,236 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 88 predicate places. [2024-05-12 11:04:33,236 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 161 transitions, 1291 flow [2024-05-12 11:04:33,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 16.516129032258064) internal successors, (512), 31 states have internal predecessors, (512), 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 11:04:33,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:33,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:33,254 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 11:04:33,452 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 11:04:33,452 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:33,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash -627167162, now seen corresponding path program 2 times [2024-05-12 11:04:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:33,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516932479] [2024-05-12 11:04:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:33,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-05-12 11:04:33,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:33,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516932479] [2024-05-12 11:04:33,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516932479] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:33,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411727561] [2024-05-12 11:04:33,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:04:33,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:33,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:33,644 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 11:04:33,668 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 11:04:33,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:04:33,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:33,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 7 conjunts are in the unsatisfiable core [2024-05-12 11:04:33,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-05-12 11:04:33,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-05-12 11:04:33,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411727561] provided 1 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:33,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-05-12 11:04:33,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2024-05-12 11:04:33,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071344771] [2024-05-12 11:04:33,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:33,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 11:04:33,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:33,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 11:04:33,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-05-12 11:04:33,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-05-12 11:04:33,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 161 transitions, 1291 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 11:04:33,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:33,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-05-12 11:04:33,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:35,794 INFO L124 PetriNetUnfolderBase]: 10126/16343 cut-off events. [2024-05-12 11:04:35,794 INFO L125 PetriNetUnfolderBase]: For 35258/35742 co-relation queries the response was YES. [2024-05-12 11:04:35,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52357 conditions, 16343 events. 10126/16343 cut-off events. For 35258/35742 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 111707 event pairs, 4366 based on Foata normal form. 228/15064 useless extension candidates. Maximal degree in co-relation 49669. Up to 11007 conditions per place. [2024-05-12 11:04:35,882 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 189 selfloop transitions, 5 changer transitions 0/210 dead transitions. [2024-05-12 11:04:35,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 210 transitions, 2037 flow [2024-05-12 11:04:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 11:04:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 11:04:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-05-12 11:04:35,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-05-12 11:04:35,883 INFO L175 Difference]: Start difference. First operand has 136 places, 161 transitions, 1291 flow. Second operand 6 states and 141 transitions. [2024-05-12 11:04:35,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 210 transitions, 2037 flow [2024-05-12 11:04:36,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 210 transitions, 1759 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-05-12 11:04:36,057 INFO L231 Difference]: Finished difference. Result has 137 places, 162 transitions, 1041 flow [2024-05-12 11:04:36,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1023, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1041, PETRI_PLACES=137, PETRI_TRANSITIONS=162} [2024-05-12 11:04:36,058 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 89 predicate places. [2024-05-12 11:04:36,058 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 162 transitions, 1041 flow [2024-05-12 11:04:36,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 11:04:36,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:36,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:36,074 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 11:04:36,272 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 11:04:36,272 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:36,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:36,273 INFO L85 PathProgramCache]: Analyzing trace with hash 347822132, now seen corresponding path program 1 times [2024-05-12 11:04:36,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:36,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533514599] [2024-05-12 11:04:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:36,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-05-12 11:04:36,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:36,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533514599] [2024-05-12 11:04:36,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533514599] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:36,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:04:36,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 11:04:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836821702] [2024-05-12 11:04:36,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:36,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 11:04:36,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 11:04:36,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 11:04:36,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 49 [2024-05-12 11:04:36,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 162 transitions, 1041 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:04:36,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:36,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 49 [2024-05-12 11:04:36,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:39,138 INFO L124 PetriNetUnfolderBase]: 15886/25899 cut-off events. [2024-05-12 11:04:39,139 INFO L125 PetriNetUnfolderBase]: For 50839/53286 co-relation queries the response was YES. [2024-05-12 11:04:39,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81408 conditions, 25899 events. 15886/25899 cut-off events. For 50839/53286 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 190057 event pairs, 6397 based on Foata normal form. 1698/23781 useless extension candidates. Maximal degree in co-relation 77876. Up to 12252 conditions per place. [2024-05-12 11:04:39,269 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 258 selfloop transitions, 14 changer transitions 1/283 dead transitions. [2024-05-12 11:04:39,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 283 transitions, 2453 flow [2024-05-12 11:04:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 11:04:39,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 11:04:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-05-12 11:04:39,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5877551020408164 [2024-05-12 11:04:39,271 INFO L175 Difference]: Start difference. First operand has 137 places, 162 transitions, 1041 flow. Second operand 5 states and 144 transitions. [2024-05-12 11:04:39,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 283 transitions, 2453 flow [2024-05-12 11:04:39,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 283 transitions, 2434 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 11:04:39,672 INFO L231 Difference]: Finished difference. Result has 140 places, 175 transitions, 1210 flow [2024-05-12 11:04:39,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1210, PETRI_PLACES=140, PETRI_TRANSITIONS=175} [2024-05-12 11:04:39,673 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 92 predicate places. [2024-05-12 11:04:39,673 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 175 transitions, 1210 flow [2024-05-12 11:04:39,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:04:39,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:39,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:39,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 11:04:39,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:39,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:39,675 INFO L85 PathProgramCache]: Analyzing trace with hash -676088192, now seen corresponding path program 2 times [2024-05-12 11:04:39,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:39,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124130588] [2024-05-12 11:04:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-05-12 11:04:39,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:39,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124130588] [2024-05-12 11:04:39,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124130588] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:39,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025960796] [2024-05-12 11:04:39,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:04:39,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:39,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:39,771 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 11:04:39,789 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 11:04:39,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:04:39,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:39,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 7 conjunts are in the unsatisfiable core [2024-05-12 11:04:39,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-05-12 11:04:39,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-05-12 11:04:40,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025960796] provided 1 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:40,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-05-12 11:04:40,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-05-12 11:04:40,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575969143] [2024-05-12 11:04:40,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:40,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 11:04:40,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:40,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 11:04:40,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 11:04:40,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-05-12 11:04:40,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 175 transitions, 1210 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:04:40,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:40,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-05-12 11:04:40,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:42,556 INFO L124 PetriNetUnfolderBase]: 15695/24061 cut-off events. [2024-05-12 11:04:42,556 INFO L125 PetriNetUnfolderBase]: For 50741/53398 co-relation queries the response was YES. [2024-05-12 11:04:42,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82522 conditions, 24061 events. 15695/24061 cut-off events. For 50741/53398 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 162356 event pairs, 5296 based on Foata normal form. 1800/23167 useless extension candidates. Maximal degree in co-relation 79544. Up to 12076 conditions per place. [2024-05-12 11:04:42,701 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 143 selfloop transitions, 35 changer transitions 0/189 dead transitions. [2024-05-12 11:04:42,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 189 transitions, 1606 flow [2024-05-12 11:04:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 11:04:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 11:04:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-05-12 11:04:42,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-05-12 11:04:42,702 INFO L175 Difference]: Start difference. First operand has 140 places, 175 transitions, 1210 flow. Second operand 6 states and 134 transitions. [2024-05-12 11:04:42,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 189 transitions, 1606 flow [2024-05-12 11:04:42,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 189 transitions, 1606 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-05-12 11:04:42,916 INFO L231 Difference]: Finished difference. Result has 145 places, 174 transitions, 1270 flow [2024-05-12 11:04:42,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1270, PETRI_PLACES=145, PETRI_TRANSITIONS=174} [2024-05-12 11:04:42,917 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 97 predicate places. [2024-05-12 11:04:42,917 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 174 transitions, 1270 flow [2024-05-12 11:04:42,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:04:42,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:42,918 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:42,936 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 11:04:43,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-05-12 11:04:43,133 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:43,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:43,133 INFO L85 PathProgramCache]: Analyzing trace with hash -198907620, now seen corresponding path program 1 times [2024-05-12 11:04:43,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:43,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489631502] [2024-05-12 11:04:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:43,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-05-12 11:04:43,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:43,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489631502] [2024-05-12 11:04:43,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489631502] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:04:43,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:04:43,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 11:04:43,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791976446] [2024-05-12 11:04:43,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:04:43,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 11:04:43,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:43,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 11:04:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 11:04:43,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 49 [2024-05-12 11:04:43,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 174 transitions, 1270 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 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 11:04:43,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:43,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 49 [2024-05-12 11:04:43,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:47,113 INFO L124 PetriNetUnfolderBase]: 20565/31704 cut-off events. [2024-05-12 11:04:47,113 INFO L125 PetriNetUnfolderBase]: For 95688/98461 co-relation queries the response was YES. [2024-05-12 11:04:47,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115514 conditions, 31704 events. 20565/31704 cut-off events. For 95688/98461 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 211933 event pairs, 5355 based on Foata normal form. 3020/32355 useless extension candidates. Maximal degree in co-relation 109673. Up to 25916 conditions per place. [2024-05-12 11:04:47,321 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 215 selfloop transitions, 19 changer transitions 0/253 dead transitions. [2024-05-12 11:04:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 253 transitions, 2275 flow [2024-05-12 11:04:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 11:04:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 11:04:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-05-12 11:04:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-05-12 11:04:47,323 INFO L175 Difference]: Start difference. First operand has 145 places, 174 transitions, 1270 flow. Second operand 6 states and 150 transitions. [2024-05-12 11:04:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 253 transitions, 2275 flow [2024-05-12 11:04:47,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 253 transitions, 2217 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 11:04:47,901 INFO L231 Difference]: Finished difference. Result has 150 places, 180 transitions, 1327 flow [2024-05-12 11:04:47,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1327, PETRI_PLACES=150, PETRI_TRANSITIONS=180} [2024-05-12 11:04:47,902 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 102 predicate places. [2024-05-12 11:04:47,902 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 180 transitions, 1327 flow [2024-05-12 11:04:47,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 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 11:04:47,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:47,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:04:47,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 11:04:47,902 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 11:04:47,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:47,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1137291426, now seen corresponding path program 2 times [2024-05-12 11:04:47,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933533652] [2024-05-12 11:04:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:47,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 11:04:50,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:50,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933533652] [2024-05-12 11:04:50,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933533652] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:50,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138251550] [2024-05-12 11:04:50,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:04:50,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:50,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:50,770 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 11:04:50,781 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 11:04:50,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:04:50,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:50,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 37 conjunts are in the unsatisfiable core [2024-05-12 11:04:50,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:51,937 INFO L349 Elim1Store]: treesize reduction 40, result has 43.7 percent of original size [2024-05-12 11:04:51,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 128 treesize of output 93 [2024-05-12 11:05:09,838 WARN L293 SmtUtils]: Spent 13.98s on a formula simplification that was a NOOP. DAG size: 1324 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-05-12 11:05:09,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 11:05:09,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 42 select indices, 42 select index equivalence classes, 1 disjoint index pairs (out of 861 index pairs), introduced 42 new quantified variables, introduced 861 case distinctions, treesize of input 862 treesize of output 3714