./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.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-nonblocking-cntr-alt.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-nonblocking-cntr-alt.wvr.c ./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-nonblocking-cntr-alt.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 11:02:04,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 11:02:04,558 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 11:02:04,564 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 11:02:04,565 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 11:02:04,595 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 11:02:04,595 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 11:02:04,596 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 11:02:04,596 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 11:02:04,600 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 11:02:04,600 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 11:02:04,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 11:02:04,601 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 11:02:04,603 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 11:02:04,603 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 11:02:04,603 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 11:02:04,603 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 11:02:04,604 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 11:02:04,604 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 11:02:04,604 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 11:02:04,605 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 11:02:04,606 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 11:02:04,606 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 11:02:04,606 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 11:02:04,606 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 11:02:04,607 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 11:02:04,607 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 11:02:04,607 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 11:02:04,608 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 11:02:04,608 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 11:02:04,609 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 11:02:04,609 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 11:02:04,609 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:02:04,609 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 11:02:04,610 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 11:02:04,610 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 11:02:04,610 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 11:02:04,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 11:02:04,610 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 11:02:04,611 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 11:02:04,611 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 11:02:04,611 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 11:02:04,611 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 11:02:04,611 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 11:02:04,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 11:02:04,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 11:02:04,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 11:02:04,901 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 11:02:04,901 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 11:02:04,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-05-12 11:02:06,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 11:02:06,436 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 11:02:06,436 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2024-05-12 11:02:06,444 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03fbce947/36f1d9a15fe24a3788173da5c807e96f/FLAG7aa0b6dc8 [2024-05-12 11:02:06,460 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03fbce947/36f1d9a15fe24a3788173da5c807e96f [2024-05-12 11:02:06,462 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 11:02:06,463 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 11:02:06,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/popl20-nonblocking-cntr-alt.wvr.yml/witness.yml [2024-05-12 11:02:06,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 11:02:06,544 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 11:02:06,545 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 11:02:06,545 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 11:02:06,550 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 11:02:06,550 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:02:06" (1/2) ... [2024-05-12 11:02:06,551 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222d18f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:02:06, skipping insertion in model container [2024-05-12 11:02:06,551 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 11:02:06" (1/2) ... [2024-05-12 11:02:06,554 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7625d18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 11:02:06, skipping insertion in model container [2024-05-12 11:02:06,554 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:02:06" (2/2) ... [2024-05-12 11:02:06,556 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222d18f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:02:06, skipping insertion in model container [2024-05-12 11:02:06,556 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:02:06" (2/2) ... [2024-05-12 11:02:06,556 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 11:02:06,574 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 11:02:06,575 INFO L97 edCorrectnessWitness]: Location invariant before [L73-L73] ! multithreaded || ((((4294967296LL + (long long )M1) + (long long )M2 >= 0LL && (4294967295LL - (long long )M1) + (long long )M2 >= 0LL) && (4294967295LL + (long long )M1) - (long long )M2 >= 0LL) && (4294967294LL - (long long )M1) - (long long )M2 >= 0LL) [2024-05-12 11:02:06,576 INFO L97 edCorrectnessWitness]: Location invariant before [L74-L74] ! multithreaded || ((((4294967296LL + (long long )M1) + (long long )M2 >= 0LL && (4294967295LL - (long long )M1) + (long long )M2 >= 0LL) && (4294967295LL + (long long )M1) - (long long )M2 >= 0LL) && (4294967294LL - (long long )M1) - (long long )M2 >= 0LL) [2024-05-12 11:02:06,576 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 11:02:06,576 INFO L106 edCorrectnessWitness]: ghost_update [L72-L72] multithreaded = 1; [2024-05-12 11:02:06,595 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 11:02:06,789 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2024-05-12 11:02:06,793 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:02:06,802 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 11:02:06,855 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2024-05-12 11:02:06,857 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 11:02:06,870 INFO L206 MainTranslator]: Completed translation [2024-05-12 11:02:06,871 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 11:02:06 WrapperNode [2024-05-12 11:02:06,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 11:02:06,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 11:02:06,872 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 11:02:06,872 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 11:02:06,878 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,883 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,899 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-05-12 11:02:06,900 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 11:02:06,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 11:02:06,901 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 11:02:06,901 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 11:02:06,910 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,910 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,912 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,930 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-05-12 11:02:06,930 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,930 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,936 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,939 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,940 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,940 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 11:02:06,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 11:02:06,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 11:02:06,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 11:02:06,944 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 11:02:06" (1/1) ... [2024-05-12 11:02:06,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 11:02:06,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:06,971 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 11:02:06,980 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 11:02:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 11:02:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 11:02:07,002 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 11:02:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 11:02:07,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 11:02:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 11:02:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 11:02:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 11:02:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 11:02:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 11:02:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 11:02:07,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 11:02:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 11:02:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 11:02:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 11:02:07,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 11:02:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 11:02:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 11:02:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 11:02:07,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 11:02:07,006 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 11:02:07,085 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 11:02:07,086 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 11:02:07,260 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 11:02:07,260 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 11:02:07,460 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 11:02:07,460 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-05-12 11:02:07,461 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:02:07 BoogieIcfgContainer [2024-05-12 11:02:07,461 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 11:02:07,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 11:02:07,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 11:02:07,468 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 11:02:07,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 11:02:06" (1/4) ... [2024-05-12 11:02:07,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a139217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 11:02:07, skipping insertion in model container [2024-05-12 11:02:07,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 11:02:06" (2/4) ... [2024-05-12 11:02:07,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a139217 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:02:07, skipping insertion in model container [2024-05-12 11:02:07,470 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 11:02:06" (3/4) ... [2024-05-12 11:02:07,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a139217 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 11:02:07, skipping insertion in model container [2024-05-12 11:02:07,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 11:02:07" (4/4) ... [2024-05-12 11:02:07,473 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2024-05-12 11:02:07,489 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 11:02:07,489 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-05-12 11:02:07,489 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 11:02:07,535 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-05-12 11:02:07,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 28 transitions, 70 flow [2024-05-12 11:02:07,585 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2024-05-12 11:02:07,586 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-05-12 11:02:07,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 2/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-05-12 11:02:07,588 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 28 transitions, 70 flow [2024-05-12 11:02:07,591 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 25 transitions, 62 flow [2024-05-12 11:02:07,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 11:02:07,607 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;@5e17d6b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 11:02:07,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-05-12 11:02:07,612 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 11:02:07,613 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 11:02:07,613 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:02:07,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:07,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 11:02:07,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:07,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:07,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1043752267, now seen corresponding path program 1 times [2024-05-12 11:02:07,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:07,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185375907] [2024-05-12 11:02:07,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:07,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:07,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:07,957 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 11:02:07,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:07,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185375907] [2024-05-12 11:02:07,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185375907] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:02:07,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:02:07,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 11:02:07,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312341768] [2024-05-12 11:02:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:02:07,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 11:02:07,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:08,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 11:02:08,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 11:02:08,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-05-12 11:02:08,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 11:02:08,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:08,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-05-12 11:02:08,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:08,161 INFO L124 PetriNetUnfolderBase]: 94/169 cut-off events. [2024-05-12 11:02:08,162 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-05-12 11:02:08,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 169 events. 94/169 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 567 event pairs, 46 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 285. Up to 149 conditions per place. [2024-05-12 11:02:08,165 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 17 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2024-05-12 11:02:08,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 94 flow [2024-05-12 11:02:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 11:02:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 11:02:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-05-12 11:02:08,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-05-12 11:02:08,176 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 62 flow. Second operand 3 states and 41 transitions. [2024-05-12 11:02:08,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 94 flow [2024-05-12 11:02:08,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 23 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 11:02:08,181 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 52 flow [2024-05-12 11:02:08,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2024-05-12 11:02:08,185 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2024-05-12 11:02:08,185 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 52 flow [2024-05-12 11:02:08,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 11:02:08,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:08,186 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 11:02:08,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 11:02:08,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:08,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash -876216288, now seen corresponding path program 1 times [2024-05-12 11:02:08,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:08,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972900408] [2024-05-12 11:02:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:08,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:08,272 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 11:02:08,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:08,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972900408] [2024-05-12 11:02:08,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972900408] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:02:08,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:02:08,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:02:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460171843] [2024-05-12 11:02:08,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:02:08,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 11:02:08,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 11:02:08,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 11:02:08,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-05-12 11:02:08,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 11:02:08,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:08,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-05-12 11:02:08,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:08,399 INFO L124 PetriNetUnfolderBase]: 125/230 cut-off events. [2024-05-12 11:02:08,400 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 11:02:08,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 230 events. 125/230 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 834 event pairs, 33 based on Foata normal form. 12/228 useless extension candidates. Maximal degree in co-relation 440. Up to 140 conditions per place. [2024-05-12 11:02:08,404 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 25 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-05-12 11:02:08,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 127 flow [2024-05-12 11:02:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 11:02:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 11:02:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-05-12 11:02:08,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-05-12 11:02:08,415 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 52 flow. Second operand 4 states and 61 transitions. [2024-05-12 11:02:08,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 127 flow [2024-05-12 11:02:08,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 32 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 11:02:08,419 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 65 flow [2024-05-12 11:02:08,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=65, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2024-05-12 11:02:08,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-05-12 11:02:08,420 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 65 flow [2024-05-12 11:02:08,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 11:02:08,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:08,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:02:08,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 11:02:08,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:08,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1624486332, now seen corresponding path program 1 times [2024-05-12 11:02:08,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:08,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904799266] [2024-05-12 11:02:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:08,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:08,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:08,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904799266] [2024-05-12 11:02:08,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904799266] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 11:02:08,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 11:02:08,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 11:02:08,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866152687] [2024-05-12 11:02:08,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 11:02:08,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 11:02:08,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 11:02:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 11:02:08,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2024-05-12 11:02:08,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 11:02:08,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:08,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2024-05-12 11:02:08,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:08,617 INFO L124 PetriNetUnfolderBase]: 124/244 cut-off events. [2024-05-12 11:02:08,617 INFO L125 PetriNetUnfolderBase]: For 39/53 co-relation queries the response was YES. [2024-05-12 11:02:08,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 244 events. 124/244 cut-off events. For 39/53 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 905 event pairs, 68 based on Foata normal form. 31/268 useless extension candidates. Maximal degree in co-relation 521. Up to 168 conditions per place. [2024-05-12 11:02:08,622 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 26 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2024-05-12 11:02:08,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 149 flow [2024-05-12 11:02:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 11:02:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 11:02:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-05-12 11:02:08,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-05-12 11:02:08,625 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 65 flow. Second operand 4 states and 60 transitions. [2024-05-12 11:02:08,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 149 flow [2024-05-12 11:02:08,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 11:02:08,628 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 75 flow [2024-05-12 11:02:08,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=75, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-05-12 11:02:08,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-05-12 11:02:08,630 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 75 flow [2024-05-12 11:02:08,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 11:02:08,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:08,630 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] [2024-05-12 11:02:08,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 11:02:08,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:08,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:08,631 INFO L85 PathProgramCache]: Analyzing trace with hash -56409864, now seen corresponding path program 1 times [2024-05-12 11:02:08,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:08,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606843558] [2024-05-12 11:02:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:08,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606843558] [2024-05-12 11:02:09,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606843558] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:09,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580338943] [2024-05-12 11:02:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:09,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:09,118 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 11:02:09,123 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 11:02:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:09,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:02:09,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:09,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:10,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580338943] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:10,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:10,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-05-12 11:02:10,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842654203] [2024-05-12 11:02:10,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:10,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:02:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:10,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:02:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:02:10,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:10,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 75 flow. Second operand has 25 states, 25 states have (on average 5.48) internal successors, (137), 25 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:10,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:10,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:10,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:11,651 INFO L124 PetriNetUnfolderBase]: 950/1595 cut-off events. [2024-05-12 11:02:11,651 INFO L125 PetriNetUnfolderBase]: For 433/433 co-relation queries the response was YES. [2024-05-12 11:02:11,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3935 conditions, 1595 events. 950/1595 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7740 event pairs, 22 based on Foata normal form. 2/1597 useless extension candidates. Maximal degree in co-relation 3926. Up to 325 conditions per place. [2024-05-12 11:02:11,661 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 181 selfloop transitions, 111 changer transitions 17/310 dead transitions. [2024-05-12 11:02:11,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 310 transitions, 1501 flow [2024-05-12 11:02:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-05-12 11:02:11,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-05-12 11:02:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 412 transitions. [2024-05-12 11:02:11,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772893772893773 [2024-05-12 11:02:11,667 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 75 flow. Second operand 39 states and 412 transitions. [2024-05-12 11:02:11,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 310 transitions, 1501 flow [2024-05-12 11:02:11,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 310 transitions, 1469 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 11:02:11,676 INFO L231 Difference]: Finished difference. Result has 84 places, 154 transitions, 923 flow [2024-05-12 11:02:11,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=923, PETRI_PLACES=84, PETRI_TRANSITIONS=154} [2024-05-12 11:02:11,678 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 54 predicate places. [2024-05-12 11:02:11,678 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 154 transitions, 923 flow [2024-05-12 11:02:11,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 25 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:11,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:11,679 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] [2024-05-12 11:02:11,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-05-12 11:02:11,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:11,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:11,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1099848092, now seen corresponding path program 2 times [2024-05-12 11:02:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:11,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318265672] [2024-05-12 11:02:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:12,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:12,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318265672] [2024-05-12 11:02:12,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318265672] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:12,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309073790] [2024-05-12 11:02:12,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:02:12,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:12,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:12,155 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 11:02:12,179 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 11:02:12,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:02:12,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:12,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:02:12,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:12,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:12,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309073790] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:12,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:12,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-05-12 11:02:12,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400126888] [2024-05-12 11:02:12,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:12,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:02:12,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:12,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:02:12,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:02:13,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:13,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 154 transitions, 923 flow. Second operand has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 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 11:02:13,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:13,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:13,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:14,165 INFO L124 PetriNetUnfolderBase]: 1094/1914 cut-off events. [2024-05-12 11:02:14,165 INFO L125 PetriNetUnfolderBase]: For 4442/4442 co-relation queries the response was YES. [2024-05-12 11:02:14,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7351 conditions, 1914 events. 1094/1914 cut-off events. For 4442/4442 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9776 event pairs, 56 based on Foata normal form. 3/1917 useless extension candidates. Maximal degree in co-relation 7325. Up to 573 conditions per place. [2024-05-12 11:02:14,182 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 168 selfloop transitions, 115 changer transitions 37/321 dead transitions. [2024-05-12 11:02:14,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 321 transitions, 2381 flow [2024-05-12 11:02:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-05-12 11:02:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-05-12 11:02:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 297 transitions. [2024-05-12 11:02:14,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-05-12 11:02:14,184 INFO L175 Difference]: Start difference. First operand has 84 places, 154 transitions, 923 flow. Second operand 27 states and 297 transitions. [2024-05-12 11:02:14,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 321 transitions, 2381 flow [2024-05-12 11:02:14,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 321 transitions, 2285 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-05-12 11:02:14,224 INFO L231 Difference]: Finished difference. Result has 115 places, 183 transitions, 1401 flow [2024-05-12 11:02:14,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1401, PETRI_PLACES=115, PETRI_TRANSITIONS=183} [2024-05-12 11:02:14,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2024-05-12 11:02:14,225 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 183 transitions, 1401 flow [2024-05-12 11:02:14,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 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 11:02:14,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:14,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 11:02:14,243 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 11:02:14,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:14,439 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:14,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1616012550, now seen corresponding path program 3 times [2024-05-12 11:02:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:14,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811812147] [2024-05-12 11:02:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:14,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:14,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:14,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811812147] [2024-05-12 11:02:14,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811812147] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:14,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768525975] [2024-05-12 11:02:14,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:02:14,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:14,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:14,661 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 11:02:14,677 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 11:02:14,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-05-12 11:02:14,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:14,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:02:14,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:14,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:15,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768525975] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:15,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:15,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-05-12 11:02:15,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950192484] [2024-05-12 11:02:15,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:15,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:02:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:02:15,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:02:15,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:15,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 183 transitions, 1401 flow. Second operand has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 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 11:02:15,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:15,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:15,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:16,679 INFO L124 PetriNetUnfolderBase]: 1053/1837 cut-off events. [2024-05-12 11:02:16,679 INFO L125 PetriNetUnfolderBase]: For 7458/7458 co-relation queries the response was YES. [2024-05-12 11:02:16,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8221 conditions, 1837 events. 1053/1837 cut-off events. For 7458/7458 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9180 event pairs, 50 based on Foata normal form. 1/1838 useless extension candidates. Maximal degree in co-relation 8186. Up to 574 conditions per place. [2024-05-12 11:02:16,694 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 164 selfloop transitions, 124 changer transitions 23/312 dead transitions. [2024-05-12 11:02:16,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 312 transitions, 2659 flow [2024-05-12 11:02:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-05-12 11:02:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-05-12 11:02:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 317 transitions. [2024-05-12 11:02:16,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3773809523809524 [2024-05-12 11:02:16,696 INFO L175 Difference]: Start difference. First operand has 115 places, 183 transitions, 1401 flow. Second operand 30 states and 317 transitions. [2024-05-12 11:02:16,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 312 transitions, 2659 flow [2024-05-12 11:02:16,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 312 transitions, 2534 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-05-12 11:02:16,748 INFO L231 Difference]: Finished difference. Result has 136 places, 186 transitions, 1666 flow [2024-05-12 11:02:16,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1666, PETRI_PLACES=136, PETRI_TRANSITIONS=186} [2024-05-12 11:02:16,751 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-05-12 11:02:16,751 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 186 transitions, 1666 flow [2024-05-12 11:02:16,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.56) internal successors, (139), 25 states have internal predecessors, (139), 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 11:02:16,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:16,751 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] [2024-05-12 11:02:16,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-05-12 11:02:16,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:16,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:16,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1751815388, now seen corresponding path program 4 times [2024-05-12 11:02:16,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:16,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896195861] [2024-05-12 11:02:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:16,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:17,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:17,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896195861] [2024-05-12 11:02:17,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896195861] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:17,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138134986] [2024-05-12 11:02:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:02:17,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:17,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:17,194 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 11:02:17,194 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 11:02:17,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:02:17,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:17,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2024-05-12 11:02:17,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:17,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:17,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138134986] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:17,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:17,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2024-05-12 11:02:17,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638852377] [2024-05-12 11:02:17,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:17,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-05-12 11:02:17,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:17,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-05-12 11:02:17,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2024-05-12 11:02:17,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:17,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 186 transitions, 1666 flow. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 states have internal predecessors, (140), 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 11:02:17,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:17,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:17,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:19,500 INFO L124 PetriNetUnfolderBase]: 1364/2351 cut-off events. [2024-05-12 11:02:19,500 INFO L125 PetriNetUnfolderBase]: For 10291/10291 co-relation queries the response was YES. [2024-05-12 11:02:19,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11460 conditions, 2351 events. 1364/2351 cut-off events. For 10291/10291 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12394 event pairs, 49 based on Foata normal form. 3/2354 useless extension candidates. Maximal degree in co-relation 11419. Up to 492 conditions per place. [2024-05-12 11:02:19,519 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 210 selfloop transitions, 204 changer transitions 24/439 dead transitions. [2024-05-12 11:02:19,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 439 transitions, 4277 flow [2024-05-12 11:02:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-05-12 11:02:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-05-12 11:02:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 401 transitions. [2024-05-12 11:02:19,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38706563706563707 [2024-05-12 11:02:19,523 INFO L175 Difference]: Start difference. First operand has 136 places, 186 transitions, 1666 flow. Second operand 37 states and 401 transitions. [2024-05-12 11:02:19,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 439 transitions, 4277 flow [2024-05-12 11:02:19,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 439 transitions, 3956 flow, removed 44 selfloop flow, removed 21 redundant places. [2024-05-12 11:02:19,580 INFO L231 Difference]: Finished difference. Result has 161 places, 278 transitions, 2997 flow [2024-05-12 11:02:19,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2997, PETRI_PLACES=161, PETRI_TRANSITIONS=278} [2024-05-12 11:02:19,581 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2024-05-12 11:02:19,581 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 278 transitions, 2997 flow [2024-05-12 11:02:19,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 states have internal predecessors, (140), 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 11:02:19,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:19,582 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] [2024-05-12 11:02:19,594 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 11:02:19,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:19,784 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:19,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:19,784 INFO L85 PathProgramCache]: Analyzing trace with hash -365083876, now seen corresponding path program 5 times [2024-05-12 11:02:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:19,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970482022] [2024-05-12 11:02:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:19,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:19,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970482022] [2024-05-12 11:02:19,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970482022] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:19,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105049814] [2024-05-12 11:02:19,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 11:02:19,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:19,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:19,854 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 11:02:19,880 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 11:02:19,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 11:02:19,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:19,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2024-05-12 11:02:19,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:19,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:20,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105049814] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:20,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:20,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-05-12 11:02:20,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110886552] [2024-05-12 11:02:20,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:20,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 11:02:20,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 11:02:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 11:02:20,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2024-05-12 11:02:20,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 278 transitions, 2997 flow. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:20,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:20,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2024-05-12 11:02:20,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:20,357 INFO L124 PetriNetUnfolderBase]: 1202/2109 cut-off events. [2024-05-12 11:02:20,358 INFO L125 PetriNetUnfolderBase]: For 13775/13797 co-relation queries the response was YES. [2024-05-12 11:02:20,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11582 conditions, 2109 events. 1202/2109 cut-off events. For 13775/13797 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11117 event pairs, 43 based on Foata normal form. 46/2150 useless extension candidates. Maximal degree in co-relation 11528. Up to 1066 conditions per place. [2024-05-12 11:02:20,380 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 171 selfloop transitions, 106 changer transitions 1/313 dead transitions. [2024-05-12 11:02:20,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 313 transitions, 3813 flow [2024-05-12 11:02:20,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 11:02:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 11:02:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2024-05-12 11:02:20,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-05-12 11:02:20,381 INFO L175 Difference]: Start difference. First operand has 161 places, 278 transitions, 2997 flow. Second operand 5 states and 77 transitions. [2024-05-12 11:02:20,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 313 transitions, 3813 flow [2024-05-12 11:02:20,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 313 transitions, 3529 flow, removed 83 selfloop flow, removed 12 redundant places. [2024-05-12 11:02:20,503 INFO L231 Difference]: Finished difference. Result has 149 places, 282 transitions, 3206 flow [2024-05-12 11:02:20,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2659, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3206, PETRI_PLACES=149, PETRI_TRANSITIONS=282} [2024-05-12 11:02:20,504 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-05-12 11:02:20,504 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 282 transitions, 3206 flow [2024-05-12 11:02:20,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 8 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:20,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:20,505 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] [2024-05-12 11:02:20,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-05-12 11:02:20,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:20,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:20,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash -459931548, now seen corresponding path program 6 times [2024-05-12 11:02:20,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:20,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543098397] [2024-05-12 11:02:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:20,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:20,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:20,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:20,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543098397] [2024-05-12 11:02:20,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543098397] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:20,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533833779] [2024-05-12 11:02:20,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 11:02:20,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:20,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:20,929 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 11:02:20,930 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 11:02:20,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-05-12 11:02:20,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:20,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:02:20,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:21,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:21,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533833779] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:21,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:21,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-05-12 11:02:21,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047545530] [2024-05-12 11:02:21,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:21,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:02:21,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:21,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:02:21,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:02:21,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:21,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 282 transitions, 3206 flow. Second operand has 25 states, 25 states have (on average 5.48) internal successors, (137), 25 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:21,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:21,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:21,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:22,646 INFO L124 PetriNetUnfolderBase]: 1778/3025 cut-off events. [2024-05-12 11:02:22,646 INFO L125 PetriNetUnfolderBase]: For 18646/18646 co-relation queries the response was YES. [2024-05-12 11:02:22,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17230 conditions, 3025 events. 1778/3025 cut-off events. For 18646/18646 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16610 event pairs, 48 based on Foata normal form. 2/3003 useless extension candidates. Maximal degree in co-relation 17178. Up to 1412 conditions per place. [2024-05-12 11:02:22,671 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 219 selfloop transitions, 227 changer transitions 29/476 dead transitions. [2024-05-12 11:02:22,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 476 transitions, 5956 flow [2024-05-12 11:02:22,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-05-12 11:02:22,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-05-12 11:02:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 217 transitions. [2024-05-12 11:02:22,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-05-12 11:02:22,674 INFO L175 Difference]: Start difference. First operand has 149 places, 282 transitions, 3206 flow. Second operand 21 states and 217 transitions. [2024-05-12 11:02:22,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 476 transitions, 5956 flow [2024-05-12 11:02:22,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 476 transitions, 5944 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-05-12 11:02:22,770 INFO L231 Difference]: Finished difference. Result has 182 places, 377 transitions, 5313 flow [2024-05-12 11:02:22,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5313, PETRI_PLACES=182, PETRI_TRANSITIONS=377} [2024-05-12 11:02:22,772 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2024-05-12 11:02:22,772 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 377 transitions, 5313 flow [2024-05-12 11:02:22,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 25 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:22,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:22,773 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] [2024-05-12 11:02:22,788 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 11:02:22,984 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 11:02:22,985 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:22,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:22,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1079616732, now seen corresponding path program 7 times [2024-05-12 11:02:22,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:22,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732109991] [2024-05-12 11:02:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:22,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:22,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:23,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:23,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732109991] [2024-05-12 11:02:23,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732109991] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:23,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758461166] [2024-05-12 11:02:23,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 11:02:23,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:23,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:23,232 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 11:02:23,257 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 11:02:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:23,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:02:23,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:23,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:23,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758461166] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:23,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:23,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-05-12 11:02:23,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548301814] [2024-05-12 11:02:23,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:23,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:02:23,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:23,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:02:23,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:02:23,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:23,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 377 transitions, 5313 flow. Second operand has 25 states, 25 states have (on average 5.48) internal successors, (137), 25 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:23,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:23,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:23,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:25,174 INFO L124 PetriNetUnfolderBase]: 1859/3138 cut-off events. [2024-05-12 11:02:25,174 INFO L125 PetriNetUnfolderBase]: For 27368/27368 co-relation queries the response was YES. [2024-05-12 11:02:25,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20677 conditions, 3138 events. 1859/3138 cut-off events. For 27368/27368 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17075 event pairs, 40 based on Foata normal form. 1/3139 useless extension candidates. Maximal degree in co-relation 20610. Up to 1519 conditions per place. [2024-05-12 11:02:25,201 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 245 selfloop transitions, 269 changer transitions 11/526 dead transitions. [2024-05-12 11:02:25,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 526 transitions, 7734 flow [2024-05-12 11:02:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-05-12 11:02:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-05-12 11:02:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 249 transitions. [2024-05-12 11:02:25,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34203296703296704 [2024-05-12 11:02:25,257 INFO L175 Difference]: Start difference. First operand has 182 places, 377 transitions, 5313 flow. Second operand 26 states and 249 transitions. [2024-05-12 11:02:25,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 526 transitions, 7734 flow [2024-05-12 11:02:25,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 526 transitions, 7661 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-05-12 11:02:25,489 INFO L231 Difference]: Finished difference. Result has 208 places, 442 transitions, 7261 flow [2024-05-12 11:02:25,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5259, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7261, PETRI_PLACES=208, PETRI_TRANSITIONS=442} [2024-05-12 11:02:25,490 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-05-12 11:02:25,490 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 442 transitions, 7261 flow [2024-05-12 11:02:25,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 25 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:25,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:25,490 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] [2024-05-12 11:02:25,501 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 11:02:25,691 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 11:02:25,692 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:25,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:25,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1700687836, now seen corresponding path program 8 times [2024-05-12 11:02:25,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:25,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927366231] [2024-05-12 11:02:25,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:25,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:25,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:25,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927366231] [2024-05-12 11:02:25,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927366231] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:25,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300074116] [2024-05-12 11:02:25,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:02:25,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:25,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:25,929 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 11:02:25,930 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 11:02:25,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:02:25,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:25,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:02:25,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:26,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:26,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300074116] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:26,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:26,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-05-12 11:02:26,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407645291] [2024-05-12 11:02:26,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:26,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:02:26,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:02:26,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:02:26,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:26,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 442 transitions, 7261 flow. Second operand has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 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 11:02:26,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:26,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:26,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:27,964 INFO L124 PetriNetUnfolderBase]: 1925/3250 cut-off events. [2024-05-12 11:02:27,964 INFO L125 PetriNetUnfolderBase]: For 37010/37010 co-relation queries the response was YES. [2024-05-12 11:02:27,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24254 conditions, 3250 events. 1925/3250 cut-off events. For 37010/37010 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17746 event pairs, 49 based on Foata normal form. 2/3252 useless extension candidates. Maximal degree in co-relation 24181. Up to 1494 conditions per place. [2024-05-12 11:02:27,995 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 261 selfloop transitions, 265 changer transitions 30/557 dead transitions. [2024-05-12 11:02:27,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 557 transitions, 9620 flow [2024-05-12 11:02:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-05-12 11:02:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-05-12 11:02:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 204 transitions. [2024-05-12 11:02:27,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38345864661654133 [2024-05-12 11:02:27,998 INFO L175 Difference]: Start difference. First operand has 208 places, 442 transitions, 7261 flow. Second operand 19 states and 204 transitions. [2024-05-12 11:02:27,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 557 transitions, 9620 flow [2024-05-12 11:02:28,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 557 transitions, 9441 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-05-12 11:02:28,320 INFO L231 Difference]: Finished difference. Result has 228 places, 465 transitions, 8525 flow [2024-05-12 11:02:28,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7139, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8525, PETRI_PLACES=228, PETRI_TRANSITIONS=465} [2024-05-12 11:02:28,321 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 198 predicate places. [2024-05-12 11:02:28,321 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 465 transitions, 8525 flow [2024-05-12 11:02:28,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 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 11:02:28,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:28,322 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] [2024-05-12 11:02:28,333 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 11:02:28,523 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 11:02:28,523 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:28,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1030048988, now seen corresponding path program 9 times [2024-05-12 11:02:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:28,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148502567] [2024-05-12 11:02:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:28,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:28,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:28,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148502567] [2024-05-12 11:02:28,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148502567] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:28,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923087372] [2024-05-12 11:02:28,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:02:28,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:28,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:28,752 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 11:02:28,768 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 11:02:28,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-05-12 11:02:28,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:28,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:02:28,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:29,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:29,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923087372] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:29,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:29,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-05-12 11:02:29,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823648580] [2024-05-12 11:02:29,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:29,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-05-12 11:02:29,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-05-12 11:02:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2024-05-12 11:02:29,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:29,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 465 transitions, 8525 flow. Second operand has 25 states, 25 states have (on average 5.48) internal successors, (137), 25 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:29,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:29,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:29,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:30,787 INFO L124 PetriNetUnfolderBase]: 2015/3395 cut-off events. [2024-05-12 11:02:30,787 INFO L125 PetriNetUnfolderBase]: For 46920/46920 co-relation queries the response was YES. [2024-05-12 11:02:30,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27552 conditions, 3395 events. 2015/3395 cut-off events. For 46920/46920 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18658 event pairs, 39 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 27469. Up to 1506 conditions per place. [2024-05-12 11:02:30,822 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 288 selfloop transitions, 336 changer transitions 20/645 dead transitions. [2024-05-12 11:02:30,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 645 transitions, 11877 flow [2024-05-12 11:02:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-05-12 11:02:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-05-12 11:02:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 309 transitions. [2024-05-12 11:02:30,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34486607142857145 [2024-05-12 11:02:30,824 INFO L175 Difference]: Start difference. First operand has 228 places, 465 transitions, 8525 flow. Second operand 32 states and 309 transitions. [2024-05-12 11:02:30,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 645 transitions, 11877 flow [2024-05-12 11:02:31,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 645 transitions, 11609 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-05-12 11:02:31,149 INFO L231 Difference]: Finished difference. Result has 255 places, 532 transitions, 10917 flow [2024-05-12 11:02:31,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8339, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10917, PETRI_PLACES=255, PETRI_TRANSITIONS=532} [2024-05-12 11:02:31,150 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2024-05-12 11:02:31,150 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 532 transitions, 10917 flow [2024-05-12 11:02:31,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.48) internal successors, (137), 25 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 11:02:31,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:31,151 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] [2024-05-12 11:02:31,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-05-12 11:02:31,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:31,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:31,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:31,353 INFO L85 PathProgramCache]: Analyzing trace with hash 219713670, now seen corresponding path program 10 times [2024-05-12 11:02:31,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:31,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362610600] [2024-05-12 11:02:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:31,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:31,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:31,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362610600] [2024-05-12 11:02:31,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362610600] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:31,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203293324] [2024-05-12 11:02:31,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:02:31,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:31,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:31,576 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 11:02:31,587 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 11:02:31,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:02:31,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:31,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2024-05-12 11:02:31,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:31,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:32,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203293324] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:32,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:32,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 25 [2024-05-12 11:02:32,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963006676] [2024-05-12 11:02:32,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:32,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-05-12 11:02:32,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:32,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-05-12 11:02:32,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2024-05-12 11:02:32,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:32,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 532 transitions, 10917 flow. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 states have internal predecessors, (140), 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 11:02:32,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:32,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:32,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:33,609 INFO L124 PetriNetUnfolderBase]: 2060/3469 cut-off events. [2024-05-12 11:02:33,610 INFO L125 PetriNetUnfolderBase]: For 56514/56514 co-relation queries the response was YES. [2024-05-12 11:02:33,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30620 conditions, 3469 events. 2060/3469 cut-off events. For 56514/56514 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19146 event pairs, 31 based on Foata normal form. 1/3470 useless extension candidates. Maximal degree in co-relation 30530. Up to 1632 conditions per place. [2024-05-12 11:02:33,652 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 235 selfloop transitions, 394 changer transitions 6/636 dead transitions. [2024-05-12 11:02:33,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 636 transitions, 13333 flow [2024-05-12 11:02:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-05-12 11:02:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-05-12 11:02:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 217 transitions. [2024-05-12 11:02:33,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33695652173913043 [2024-05-12 11:02:33,654 INFO L175 Difference]: Start difference. First operand has 255 places, 532 transitions, 10917 flow. Second operand 23 states and 217 transitions. [2024-05-12 11:02:33,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 636 transitions, 13333 flow [2024-05-12 11:02:34,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 636 transitions, 12951 flow, removed 100 selfloop flow, removed 13 redundant places. [2024-05-12 11:02:34,141 INFO L231 Difference]: Finished difference. Result has 268 places, 565 transitions, 12806 flow [2024-05-12 11:02:34,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=10552, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12806, PETRI_PLACES=268, PETRI_TRANSITIONS=565} [2024-05-12 11:02:34,142 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-05-12 11:02:34,142 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 565 transitions, 12806 flow [2024-05-12 11:02:34,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 26 states have internal predecessors, (140), 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 11:02:34,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:34,142 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] [2024-05-12 11:02:34,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-05-12 11:02:34,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-05-12 11:02:34,344 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:34,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -877236670, now seen corresponding path program 11 times [2024-05-12 11:02:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:34,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084024633] [2024-05-12 11:02:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:34,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084024633] [2024-05-12 11:02:34,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084024633] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:34,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136129087] [2024-05-12 11:02:34,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 11:02:34,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:34,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:34,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:02:34,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-05-12 11:02:34,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 11:02:34,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:34,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2024-05-12 11:02:34,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:34,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:35,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136129087] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:35,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:35,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2024-05-12 11:02:35,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695065399] [2024-05-12 11:02:35,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:35,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-05-12 11:02:35,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:35,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-05-12 11:02:35,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2024-05-12 11:02:35,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:35,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 565 transitions, 12806 flow. Second operand has 36 states, 36 states have (on average 5.027777777777778) internal successors, (181), 36 states have internal predecessors, (181), 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 11:02:35,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:35,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:35,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:37,731 INFO L124 PetriNetUnfolderBase]: 2484/4226 cut-off events. [2024-05-12 11:02:37,731 INFO L125 PetriNetUnfolderBase]: For 87308/87308 co-relation queries the response was YES. [2024-05-12 11:02:37,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41428 conditions, 4226 events. 2484/4226 cut-off events. For 87308/87308 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24521 event pairs, 102 based on Foata normal form. 4/4230 useless extension candidates. Maximal degree in co-relation 41337. Up to 917 conditions per place. [2024-05-12 11:02:37,867 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 360 selfloop transitions, 474 changer transitions 84/919 dead transitions. [2024-05-12 11:02:37,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 919 transitions, 19346 flow [2024-05-12 11:02:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-05-12 11:02:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-05-12 11:02:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 537 transitions. [2024-05-12 11:02:37,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3618598382749326 [2024-05-12 11:02:37,871 INFO L175 Difference]: Start difference. First operand has 268 places, 565 transitions, 12806 flow. Second operand 53 states and 537 transitions. [2024-05-12 11:02:37,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 919 transitions, 19346 flow [2024-05-12 11:02:38,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 919 transitions, 19038 flow, removed 105 selfloop flow, removed 13 redundant places. [2024-05-12 11:02:38,517 INFO L231 Difference]: Finished difference. Result has 323 places, 678 transitions, 17081 flow [2024-05-12 11:02:38,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=12570, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=17081, PETRI_PLACES=323, PETRI_TRANSITIONS=678} [2024-05-12 11:02:38,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 293 predicate places. [2024-05-12 11:02:38,518 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 678 transitions, 17081 flow [2024-05-12 11:02:38,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.027777777777778) internal successors, (181), 36 states have internal predecessors, (181), 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 11:02:38,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:38,518 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] [2024-05-12 11:02:38,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-05-12 11:02:38,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-05-12 11:02:38,719 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:38,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash -589326408, now seen corresponding path program 12 times [2024-05-12 11:02:38,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:38,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84686092] [2024-05-12 11:02:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:38,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:38,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84686092] [2024-05-12 11:02:38,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84686092] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021526334] [2024-05-12 11:02:38,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 11:02:38,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:38,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:38,963 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:02:38,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-05-12 11:02:39,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-05-12 11:02:39,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:39,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:02:39,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:39,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:39,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021526334] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:39,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:39,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:02:39,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299766282] [2024-05-12 11:02:39,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:39,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:02:39,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:02:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:02:39,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:39,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 678 transitions, 17081 flow. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 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 11:02:39,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:39,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:39,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:44,236 INFO L124 PetriNetUnfolderBase]: 3365/5709 cut-off events. [2024-05-12 11:02:44,236 INFO L125 PetriNetUnfolderBase]: For 138567/138567 co-relation queries the response was YES. [2024-05-12 11:02:44,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60859 conditions, 5709 events. 3365/5709 cut-off events. For 138567/138567 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 34416 event pairs, 64 based on Foata normal form. 5/5714 useless extension candidates. Maximal degree in co-relation 60764. Up to 1430 conditions per place. [2024-05-12 11:02:44,298 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 473 selfloop transitions, 710 changer transitions 42/1226 dead transitions. [2024-05-12 11:02:44,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1226 transitions, 28531 flow [2024-05-12 11:02:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-05-12 11:02:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2024-05-12 11:02:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 765 transitions. [2024-05-12 11:02:44,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34584086799276675 [2024-05-12 11:02:44,305 INFO L175 Difference]: Start difference. First operand has 323 places, 678 transitions, 17081 flow. Second operand 79 states and 765 transitions. [2024-05-12 11:02:44,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1226 transitions, 28531 flow [2024-05-12 11:02:45,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1226 transitions, 27502 flow, removed 238 selfloop flow, removed 14 redundant places. [2024-05-12 11:02:45,768 INFO L231 Difference]: Finished difference. Result has 396 places, 933 transitions, 25493 flow [2024-05-12 11:02:45,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=16517, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=25493, PETRI_PLACES=396, PETRI_TRANSITIONS=933} [2024-05-12 11:02:45,769 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2024-05-12 11:02:45,769 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 933 transitions, 25493 flow [2024-05-12 11:02:45,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 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 11:02:45,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:45,769 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] [2024-05-12 11:02:45,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-05-12 11:02:45,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-05-12 11:02:45,970 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:45,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:45,971 INFO L85 PathProgramCache]: Analyzing trace with hash -977749708, now seen corresponding path program 13 times [2024-05-12 11:02:45,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:45,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537174033] [2024-05-12 11:02:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:45,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:46,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:46,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537174033] [2024-05-12 11:02:46,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537174033] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:46,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423565285] [2024-05-12 11:02:46,181 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 11:02:46,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:46,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:46,183 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:02:46,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-05-12 11:02:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:46,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:02:46,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:46,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:47,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423565285] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:47,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:47,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:02:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292299704] [2024-05-12 11:02:47,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:47,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:02:47,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:02:47,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:02:47,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:47,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 933 transitions, 25493 flow. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:02:47,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:47,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:47,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:02:53,293 INFO L124 PetriNetUnfolderBase]: 3837/6538 cut-off events. [2024-05-12 11:02:53,294 INFO L125 PetriNetUnfolderBase]: For 188200/188200 co-relation queries the response was YES. [2024-05-12 11:02:53,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72576 conditions, 6538 events. 3837/6538 cut-off events. For 188200/188200 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 40787 event pairs, 71 based on Foata normal form. 6/6544 useless extension candidates. Maximal degree in co-relation 72455. Up to 1421 conditions per place. [2024-05-12 11:02:53,368 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 547 selfloop transitions, 854 changer transitions 45/1447 dead transitions. [2024-05-12 11:02:53,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1447 transitions, 35029 flow [2024-05-12 11:02:53,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-05-12 11:02:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-05-12 11:02:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 1038 transitions. [2024-05-12 11:02:53,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3280657395701643 [2024-05-12 11:02:53,370 INFO L175 Difference]: Start difference. First operand has 396 places, 933 transitions, 25493 flow. Second operand 113 states and 1038 transitions. [2024-05-12 11:02:53,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1447 transitions, 35029 flow [2024-05-12 11:02:56,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 1447 transitions, 34005 flow, removed 128 selfloop flow, removed 22 redundant places. [2024-05-12 11:02:56,317 INFO L231 Difference]: Finished difference. Result has 503 places, 1073 transitions, 30977 flow [2024-05-12 11:02:56,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=24641, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=732, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=30977, PETRI_PLACES=503, PETRI_TRANSITIONS=1073} [2024-05-12 11:02:56,318 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 473 predicate places. [2024-05-12 11:02:56,319 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1073 transitions, 30977 flow [2024-05-12 11:02:56,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:02:56,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:02:56,319 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] [2024-05-12 11:02:56,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-05-12 11:02:56,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-05-12 11:02:56,528 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:02:56,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:02:56,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1716185088, now seen corresponding path program 14 times [2024-05-12 11:02:56,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:02:56,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808980349] [2024-05-12 11:02:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:02:56,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:02:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:02:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:56,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:02:56,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808980349] [2024-05-12 11:02:56,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808980349] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:02:56,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668962074] [2024-05-12 11:02:56,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:02:56,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:02:56,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:02:56,821 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:02:56,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-05-12 11:02:56,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:02:56,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:02:56,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:02:56,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:02:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:57,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:02:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:02:57,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668962074] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:02:57,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:02:57,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:02:57,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610051914] [2024-05-12 11:02:57,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:02:57,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:02:57,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:02:57,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:02:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:02:57,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:02:57,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1073 transitions, 30977 flow. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:02:57,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:02:57,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:02:57,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:03,613 INFO L124 PetriNetUnfolderBase]: 4687/7971 cut-off events. [2024-05-12 11:03:03,613 INFO L125 PetriNetUnfolderBase]: For 277079/277079 co-relation queries the response was YES. [2024-05-12 11:03:03,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95119 conditions, 7971 events. 4687/7971 cut-off events. For 277079/277079 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 52048 event pairs, 96 based on Foata normal form. 4/7975 useless extension candidates. Maximal degree in co-relation 94982. Up to 2335 conditions per place. [2024-05-12 11:03:03,817 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 589 selfloop transitions, 1020 changer transitions 37/1647 dead transitions. [2024-05-12 11:03:03,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 1647 transitions, 45333 flow [2024-05-12 11:03:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-05-12 11:03:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2024-05-12 11:03:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 839 transitions. [2024-05-12 11:03:03,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34441707717569786 [2024-05-12 11:03:03,819 INFO L175 Difference]: Start difference. First operand has 503 places, 1073 transitions, 30977 flow. Second operand 87 states and 839 transitions. [2024-05-12 11:03:03,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 1647 transitions, 45333 flow [2024-05-12 11:03:08,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1647 transitions, 43612 flow, removed 486 selfloop flow, removed 56 redundant places. [2024-05-12 11:03:08,982 INFO L231 Difference]: Finished difference. Result has 559 places, 1337 transitions, 41501 flow [2024-05-12 11:03:08,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=29819, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=764, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=41501, PETRI_PLACES=559, PETRI_TRANSITIONS=1337} [2024-05-12 11:03:08,984 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 529 predicate places. [2024-05-12 11:03:08,984 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 1337 transitions, 41501 flow [2024-05-12 11:03:08,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:03:08,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:08,985 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] [2024-05-12 11:03:09,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-05-12 11:03:09,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:09,200 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:03:09,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1919399050, now seen corresponding path program 15 times [2024-05-12 11:03:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:09,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649086860] [2024-05-12 11:03:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:09,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:09,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:09,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649086860] [2024-05-12 11:03:09,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649086860] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:09,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556193689] [2024-05-12 11:03:09,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:03:09,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:09,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:09,482 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:09,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-05-12 11:03:09,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-05-12 11:03:09,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:03:09,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:03:09,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:09,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:10,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556193689] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:10,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:10,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:03:10,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689515286] [2024-05-12 11:03:10,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:10,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:03:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:03:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:03:10,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:03:10,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 1337 transitions, 41501 flow. Second operand has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 states have internal predecessors, (174), 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 11:03:10,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:10,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:03:10,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:16,806 INFO L124 PetriNetUnfolderBase]: 5345/9081 cut-off events. [2024-05-12 11:03:16,807 INFO L125 PetriNetUnfolderBase]: For 379914/379914 co-relation queries the response was YES. [2024-05-12 11:03:16,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115191 conditions, 9081 events. 5345/9081 cut-off events. For 379914/379914 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60794 event pairs, 121 based on Foata normal form. 4/9085 useless extension candidates. Maximal degree in co-relation 115029. Up to 3957 conditions per place. [2024-05-12 11:03:17,019 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 710 selfloop transitions, 1018 changer transitions 36/1765 dead transitions. [2024-05-12 11:03:17,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1765 transitions, 53047 flow [2024-05-12 11:03:17,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-05-12 11:03:17,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-05-12 11:03:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 665 transitions. [2024-05-12 11:03:17,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-05-12 11:03:17,021 INFO L175 Difference]: Start difference. First operand has 559 places, 1337 transitions, 41501 flow. Second operand 70 states and 665 transitions. [2024-05-12 11:03:17,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1765 transitions, 53047 flow [2024-05-12 11:03:25,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 1765 transitions, 52237 flow, removed 261 selfloop flow, removed 18 redundant places. [2024-05-12 11:03:25,128 INFO L231 Difference]: Finished difference. Result has 640 places, 1521 transitions, 50838 flow [2024-05-12 11:03:25,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=40762, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=835, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=50838, PETRI_PLACES=640, PETRI_TRANSITIONS=1521} [2024-05-12 11:03:25,129 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 610 predicate places. [2024-05-12 11:03:25,130 INFO L495 AbstractCegarLoop]: Abstraction has has 640 places, 1521 transitions, 50838 flow [2024-05-12 11:03:25,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 states have internal predecessors, (174), 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 11:03:25,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:25,130 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] [2024-05-12 11:03:25,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-05-12 11:03:25,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-05-12 11:03:25,331 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:03:25,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash 200200568, now seen corresponding path program 16 times [2024-05-12 11:03:25,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:25,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939675215] [2024-05-12 11:03:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:25,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:25,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:25,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939675215] [2024-05-12 11:03:25,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939675215] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:25,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094592890] [2024-05-12 11:03:25,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:03:25,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:25,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:25,560 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:25,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-05-12 11:03:25,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:03:25,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:03:25,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2024-05-12 11:03:25,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:25,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:26,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094592890] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:26,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:26,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 34 [2024-05-12 11:03:26,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721707569] [2024-05-12 11:03:26,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:26,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-05-12 11:03:26,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:26,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-05-12 11:03:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2024-05-12 11:03:26,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:03:26,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 1521 transitions, 50838 flow. Second operand has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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 11:03:26,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:26,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:03:26,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:35,713 INFO L124 PetriNetUnfolderBase]: 6078/10510 cut-off events. [2024-05-12 11:03:35,713 INFO L125 PetriNetUnfolderBase]: For 556873/556873 co-relation queries the response was YES. [2024-05-12 11:03:35,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142352 conditions, 10510 events. 6078/10510 cut-off events. For 556873/556873 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 74442 event pairs, 53 based on Foata normal form. 9/10519 useless extension candidates. Maximal degree in co-relation 142157. Up to 3350 conditions per place. [2024-05-12 11:03:35,878 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 718 selfloop transitions, 1390 changer transitions 40/2149 dead transitions. [2024-05-12 11:03:35,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 2149 transitions, 66910 flow [2024-05-12 11:03:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-05-12 11:03:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2024-05-12 11:03:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 1001 transitions. [2024-05-12 11:03:35,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32207207207207206 [2024-05-12 11:03:35,881 INFO L175 Difference]: Start difference. First operand has 640 places, 1521 transitions, 50838 flow. Second operand 111 states and 1001 transitions. [2024-05-12 11:03:35,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 2149 transitions, 66910 flow [2024-05-12 11:03:47,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 2149 transitions, 66571 flow, removed 97 selfloop flow, removed 20 redundant places. [2024-05-12 11:03:47,975 INFO L231 Difference]: Finished difference. Result has 752 places, 1779 transitions, 64591 flow [2024-05-12 11:03:47,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50619, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=64591, PETRI_PLACES=752, PETRI_TRANSITIONS=1779} [2024-05-12 11:03:47,977 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 722 predicate places. [2024-05-12 11:03:47,978 INFO L495 AbstractCegarLoop]: Abstraction has has 752 places, 1779 transitions, 64591 flow [2024-05-12 11:03:47,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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 11:03:47,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:03:47,978 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] [2024-05-12 11:03:47,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-05-12 11:03:48,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:48,193 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:03:48,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:03:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1432964534, now seen corresponding path program 17 times [2024-05-12 11:03:48,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:03:48,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841045231] [2024-05-12 11:03:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:03:48,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:03:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:03:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:48,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:03:48,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841045231] [2024-05-12 11:03:48,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841045231] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:03:48,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991128113] [2024-05-12 11:03:48,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 11:03:48,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:03:48,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:03:48,432 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:03:48,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-05-12 11:03:48,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 11:03:48,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:03:48,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:03:48,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:03:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:48,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:03:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:03:49,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991128113] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:03:49,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:03:49,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:03:49,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736253187] [2024-05-12 11:03:49,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:03:49,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:03:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:03:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:03:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=953, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:03:49,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:03:49,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 752 places, 1779 transitions, 64591 flow. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 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 11:03:49,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:03:49,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:03:49,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:03:59,628 INFO L124 PetriNetUnfolderBase]: 6152/10642 cut-off events. [2024-05-12 11:03:59,628 INFO L125 PetriNetUnfolderBase]: For 667603/667603 co-relation queries the response was YES. [2024-05-12 11:03:59,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155263 conditions, 10642 events. 6152/10642 cut-off events. For 667603/667603 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 75453 event pairs, 162 based on Foata normal form. 5/10647 useless extension candidates. Maximal degree in co-relation 155046. Up to 4135 conditions per place. [2024-05-12 11:03:59,813 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 795 selfloop transitions, 1271 changer transitions 38/2105 dead transitions. [2024-05-12 11:03:59,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 841 places, 2105 transitions, 72346 flow [2024-05-12 11:03:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-05-12 11:03:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2024-05-12 11:03:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 878 transitions. [2024-05-12 11:03:59,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3232695139911635 [2024-05-12 11:03:59,815 INFO L175 Difference]: Start difference. First operand has 752 places, 1779 transitions, 64591 flow. Second operand 97 states and 878 transitions. [2024-05-12 11:03:59,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 841 places, 2105 transitions, 72346 flow [2024-05-12 11:04:17,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 794 places, 2105 transitions, 69683 flow, removed 1031 selfloop flow, removed 47 redundant places. [2024-05-12 11:04:17,094 INFO L231 Difference]: Finished difference. Result has 807 places, 1809 transitions, 67662 flow [2024-05-12 11:04:17,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=62291, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=67662, PETRI_PLACES=807, PETRI_TRANSITIONS=1809} [2024-05-12 11:04:17,096 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 777 predicate places. [2024-05-12 11:04:17,096 INFO L495 AbstractCegarLoop]: Abstraction has has 807 places, 1809 transitions, 67662 flow [2024-05-12 11:04:17,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 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 11:04:17,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:17,096 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] [2024-05-12 11:04:17,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-05-12 11:04:17,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:17,297 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:04:17,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:17,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1990704378, now seen corresponding path program 18 times [2024-05-12 11:04:17,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:17,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105721931] [2024-05-12 11:04:17,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:17,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:17,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:17,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105721931] [2024-05-12 11:04:17,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105721931] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:17,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751333308] [2024-05-12 11:04:17,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 11:04:17,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:17,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:17,536 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:04:17,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-05-12 11:04:17,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-05-12 11:04:17,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:04:17,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:04:17,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:17,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:18,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751333308] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:18,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:18,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:04:18,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436038904] [2024-05-12 11:04:18,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:18,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:04:18,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:04:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:04:18,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:04:18,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 1809 transitions, 67662 flow. Second operand has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 states have internal predecessors, (174), 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 11:04:18,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:18,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:04:18,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:04:28,791 INFO L124 PetriNetUnfolderBase]: 7069/12302 cut-off events. [2024-05-12 11:04:28,791 INFO L125 PetriNetUnfolderBase]: For 688456/688456 co-relation queries the response was YES. [2024-05-12 11:04:29,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178259 conditions, 12302 events. 7069/12302 cut-off events. For 688456/688456 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 90424 event pairs, 182 based on Foata normal form. 15/12317 useless extension candidates. Maximal degree in co-relation 178044. Up to 5256 conditions per place. [2024-05-12 11:04:29,124 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 906 selfloop transitions, 1416 changer transitions 38/2361 dead transitions. [2024-05-12 11:04:29,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 888 places, 2361 transitions, 84030 flow [2024-05-12 11:04:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-05-12 11:04:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2024-05-12 11:04:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 789 transitions. [2024-05-12 11:04:29,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32389162561576357 [2024-05-12 11:04:29,126 INFO L175 Difference]: Start difference. First operand has 807 places, 1809 transitions, 67662 flow. Second operand 87 states and 789 transitions. [2024-05-12 11:04:29,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 888 places, 2361 transitions, 84030 flow [2024-05-12 11:04:47,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 824 places, 2361 transitions, 83170 flow, removed 116 selfloop flow, removed 64 redundant places. [2024-05-12 11:04:47,278 INFO L231 Difference]: Finished difference. Result has 849 places, 2076 transitions, 81385 flow [2024-05-12 11:04:47,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=66831, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=81385, PETRI_PLACES=849, PETRI_TRANSITIONS=2076} [2024-05-12 11:04:47,280 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 819 predicate places. [2024-05-12 11:04:47,280 INFO L495 AbstractCegarLoop]: Abstraction has has 849 places, 2076 transitions, 81385 flow [2024-05-12 11:04:47,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 states have internal predecessors, (174), 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 11:04:47,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:04:47,281 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] [2024-05-12 11:04:47,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-05-12 11:04:47,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:47,481 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:04:47,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:04:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2137434492, now seen corresponding path program 19 times [2024-05-12 11:04:47,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:04:47,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37988013] [2024-05-12 11:04:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:04:47,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:04:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:47,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:04:47,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37988013] [2024-05-12 11:04:47,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37988013] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:04:47,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681727299] [2024-05-12 11:04:47,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-05-12 11:04:47,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:04:47,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:04:47,740 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:04:47,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-05-12 11:04:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:04:47,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:04:47,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:04:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:48,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:04:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:04:48,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681727299] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:04:48,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:04:48,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:04:48,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974379877] [2024-05-12 11:04:48,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:04:48,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:04:48,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:04:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:04:48,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:04:48,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:04:48,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 849 places, 2076 transitions, 81385 flow. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:04:48,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:04:48,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:04:48,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:05:00,282 INFO L124 PetriNetUnfolderBase]: 7058/12261 cut-off events. [2024-05-12 11:05:00,283 INFO L125 PetriNetUnfolderBase]: For 774281/774281 co-relation queries the response was YES. [2024-05-12 11:05:00,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187901 conditions, 12261 events. 7058/12261 cut-off events. For 774281/774281 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 89816 event pairs, 188 based on Foata normal form. 4/12265 useless extension candidates. Maximal degree in co-relation 187663. Up to 5435 conditions per place. [2024-05-12 11:05:00,632 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 801 selfloop transitions, 1508 changer transitions 18/2328 dead transitions. [2024-05-12 11:05:00,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 917 places, 2328 transitions, 88828 flow [2024-05-12 11:05:00,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-05-12 11:05:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2024-05-12 11:05:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 685 transitions. [2024-05-12 11:05:00,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3305984555984556 [2024-05-12 11:05:00,634 INFO L175 Difference]: Start difference. First operand has 849 places, 2076 transitions, 81385 flow. Second operand 74 states and 685 transitions. [2024-05-12 11:05:00,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 917 places, 2328 transitions, 88828 flow [2024-05-12 11:05:22,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 870 places, 2328 transitions, 87545 flow, removed 319 selfloop flow, removed 47 redundant places. [2024-05-12 11:05:23,017 INFO L231 Difference]: Finished difference. Result has 876 places, 2100 transitions, 84738 flow [2024-05-12 11:05:23,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=80298, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1484, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=84738, PETRI_PLACES=876, PETRI_TRANSITIONS=2100} [2024-05-12 11:05:23,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 846 predicate places. [2024-05-12 11:05:23,019 INFO L495 AbstractCegarLoop]: Abstraction has has 876 places, 2100 transitions, 84738 flow [2024-05-12 11:05:23,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:05:23,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:05:23,019 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] [2024-05-12 11:05:23,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-05-12 11:05:23,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:05:23,220 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:05:23,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:05:23,221 INFO L85 PathProgramCache]: Analyzing trace with hash -907770146, now seen corresponding path program 20 times [2024-05-12 11:05:23,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:05:23,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682272694] [2024-05-12 11:05:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:05:23,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:05:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:05:23,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:05:23,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:05:23,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682272694] [2024-05-12 11:05:23,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682272694] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:05:23,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625545306] [2024-05-12 11:05:23,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-05-12 11:05:23,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:05:23,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:05:23,486 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:05:23,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-05-12 11:05:23,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-05-12 11:05:23,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:05:23,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:05:23,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:05:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:05:23,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:05:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:05:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625545306] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:05:24,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:05:24,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:05:24,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625187675] [2024-05-12 11:05:24,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:05:24,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:05:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:05:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:05:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:05:24,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:05:24,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 876 places, 2100 transitions, 84738 flow. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:05:24,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:05:24,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:05:24,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:05:34,667 INFO L124 PetriNetUnfolderBase]: 7050/12217 cut-off events. [2024-05-12 11:05:34,668 INFO L125 PetriNetUnfolderBase]: For 762590/762590 co-relation queries the response was YES. [2024-05-12 11:05:34,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190766 conditions, 12217 events. 7050/12217 cut-off events. For 762590/762590 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 89177 event pairs, 234 based on Foata normal form. 6/12223 useless extension candidates. Maximal degree in co-relation 190528. Up to 6862 conditions per place. [2024-05-12 11:05:34,880 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 884 selfloop transitions, 1332 changer transitions 22/2239 dead transitions. [2024-05-12 11:05:34,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 2239 transitions, 90320 flow [2024-05-12 11:05:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-05-12 11:05:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-05-12 11:05:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 382 transitions. [2024-05-12 11:05:34,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3498168498168498 [2024-05-12 11:05:34,881 INFO L175 Difference]: Start difference. First operand has 876 places, 2100 transitions, 84738 flow. Second operand 39 states and 382 transitions. [2024-05-12 11:05:34,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 2239 transitions, 90320 flow [2024-05-12 11:05:56,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 867 places, 2239 transitions, 89541 flow, removed 110 selfloop flow, removed 44 redundant places. [2024-05-12 11:05:57,067 INFO L231 Difference]: Finished difference. Result has 871 places, 2100 transitions, 88069 flow [2024-05-12 11:05:57,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=83973, PETRI_DIFFERENCE_MINUEND_PLACES=829, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=770, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=88069, PETRI_PLACES=871, PETRI_TRANSITIONS=2100} [2024-05-12 11:05:57,069 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 841 predicate places. [2024-05-12 11:05:57,069 INFO L495 AbstractCegarLoop]: Abstraction has has 871 places, 2100 transitions, 88069 flow [2024-05-12 11:05:57,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:05:57,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:05:57,070 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] [2024-05-12 11:05:57,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-05-12 11:05:57,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-05-12 11:05:57,270 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:05:57,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:05:57,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1557477252, now seen corresponding path program 21 times [2024-05-12 11:05:57,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:05:57,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891878698] [2024-05-12 11:05:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:05:57,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:05:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:05:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:05:57,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:05:57,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891878698] [2024-05-12 11:05:57,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891878698] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:05:57,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886688767] [2024-05-12 11:05:57,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-05-12 11:05:57,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:05:57,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:05:57,483 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:05:57,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-05-12 11:05:57,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-05-12 11:05:57,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:05:57,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:05:57,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:05:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:05:57,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:05:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:05:58,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886688767] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:05:58,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:05:58,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:05:58,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339264926] [2024-05-12 11:05:58,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:05:58,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:05:58,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:05:58,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:05:58,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:05:58,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:05:58,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 871 places, 2100 transitions, 88069 flow. Second operand has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:05:58,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:05:58,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:05:58,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:09,234 INFO L124 PetriNetUnfolderBase]: 7309/12664 cut-off events. [2024-05-12 11:06:09,234 INFO L125 PetriNetUnfolderBase]: For 851680/851680 co-relation queries the response was YES. [2024-05-12 11:06:09,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204800 conditions, 12664 events. 7309/12664 cut-off events. For 851680/851680 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 93160 event pairs, 251 based on Foata normal form. 4/12668 useless extension candidates. Maximal degree in co-relation 204557. Up to 6905 conditions per place. [2024-05-12 11:06:09,449 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 914 selfloop transitions, 1410 changer transitions 18/2343 dead transitions. [2024-05-12 11:06:09,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 912 places, 2343 transitions, 98124 flow [2024-05-12 11:06:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-05-12 11:06:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-05-12 11:06:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 419 transitions. [2024-05-12 11:06:09,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3400974025974026 [2024-05-12 11:06:09,450 INFO L175 Difference]: Start difference. First operand has 871 places, 2100 transitions, 88069 flow. Second operand 44 states and 419 transitions. [2024-05-12 11:06:09,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 912 places, 2343 transitions, 98124 flow [2024-05-12 11:06:33,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 886 places, 2343 transitions, 97053 flow, removed 25 selfloop flow, removed 26 redundant places. [2024-05-12 11:06:33,428 INFO L231 Difference]: Finished difference. Result has 899 places, 2186 transitions, 96153 flow [2024-05-12 11:06:33,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=87029, PETRI_DIFFERENCE_MINUEND_PLACES=843, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=96153, PETRI_PLACES=899, PETRI_TRANSITIONS=2186} [2024-05-12 11:06:33,432 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 869 predicate places. [2024-05-12 11:06:33,432 INFO L495 AbstractCegarLoop]: Abstraction has has 899 places, 2186 transitions, 96153 flow [2024-05-12 11:06:33,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.088235294117647) internal successors, (173), 34 states have internal predecessors, (173), 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 11:06:33,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:06:33,432 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] [2024-05-12 11:06:33,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-05-12 11:06:33,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-05-12 11:06:33,647 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:06:33,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:06:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1200070814, now seen corresponding path program 22 times [2024-05-12 11:06:33,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:06:33,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905874686] [2024-05-12 11:06:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:06:33,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:06:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:06:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:33,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:06:33,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905874686] [2024-05-12 11:06:33,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905874686] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:06:33,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005419092] [2024-05-12 11:06:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-05-12 11:06:33,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:06:33,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:06:33,838 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:06:33,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-05-12 11:06:33,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-05-12 11:06:33,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:06:33,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2024-05-12 11:06:33,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:06:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:34,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:06:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:06:34,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005419092] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:06:34,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:06:34,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 34 [2024-05-12 11:06:34,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159967727] [2024-05-12 11:06:34,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:06:34,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-05-12 11:06:34,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:06:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-05-12 11:06:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2024-05-12 11:06:34,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:06:34,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 899 places, 2186 transitions, 96153 flow. Second operand has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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 11:06:34,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:06:34,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:06:34,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:06:47,298 INFO L124 PetriNetUnfolderBase]: 7777/13691 cut-off events. [2024-05-12 11:06:47,298 INFO L125 PetriNetUnfolderBase]: For 1038015/1038015 co-relation queries the response was YES. [2024-05-12 11:06:47,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230125 conditions, 13691 events. 7777/13691 cut-off events. For 1038015/1038015 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 104586 event pairs, 199 based on Foata normal form. 4/13695 useless extension candidates. Maximal degree in co-relation 229873. Up to 6494 conditions per place. [2024-05-12 11:06:47,549 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 773 selfloop transitions, 1728 changer transitions 30/2532 dead transitions. [2024-05-12 11:06:47,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 952 places, 2532 transitions, 110981 flow [2024-05-12 11:06:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-05-12 11:06:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-05-12 11:06:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 507 transitions. [2024-05-12 11:06:47,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32334183673469385 [2024-05-12 11:06:47,550 INFO L175 Difference]: Start difference. First operand has 899 places, 2186 transitions, 96153 flow. Second operand 56 states and 507 transitions. [2024-05-12 11:06:47,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 952 places, 2532 transitions, 110981 flow [2024-05-12 11:07:17,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 935 places, 2532 transitions, 110524 flow, removed 21 selfloop flow, removed 17 redundant places. [2024-05-12 11:07:17,274 INFO L231 Difference]: Finished difference. Result has 951 places, 2339 transitions, 109672 flow [2024-05-12 11:07:17,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=95713, PETRI_DIFFERENCE_MINUEND_PLACES=880, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=109672, PETRI_PLACES=951, PETRI_TRANSITIONS=2339} [2024-05-12 11:07:17,277 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 921 predicate places. [2024-05-12 11:07:17,277 INFO L495 AbstractCegarLoop]: Abstraction has has 951 places, 2339 transitions, 109672 flow [2024-05-12 11:07:17,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.0285714285714285) internal successors, (176), 35 states have internal predecessors, (176), 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 11:07:17,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:07:17,278 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] [2024-05-12 11:07:17,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-05-12 11:07:17,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:07:17,493 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:07:17,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:07:17,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1647405972, now seen corresponding path program 23 times [2024-05-12 11:07:17,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:07:17,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980706525] [2024-05-12 11:07:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:07:17,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:07:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:07:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:17,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:07:17,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980706525] [2024-05-12 11:07:17,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980706525] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:07:17,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192614749] [2024-05-12 11:07:17,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-05-12 11:07:17,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:07:17,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:07:17,784 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:07:17,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-05-12 11:07:17,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-05-12 11:07:17,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:07:17,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2024-05-12 11:07:17,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:07:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:18,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:07:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:07:18,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192614749] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:07:18,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:07:18,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2024-05-12 11:07:18,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131194074] [2024-05-12 11:07:18,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:07:18,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-05-12 11:07:18,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:07:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-05-12 11:07:18,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2024-05-12 11:07:18,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:07:18,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 951 places, 2339 transitions, 109672 flow. Second operand has 36 states, 36 states have (on average 5.027777777777778) internal successors, (181), 36 states have internal predecessors, (181), 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 11:07:18,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:07:18,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:07:18,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 11:07:33,958 INFO L124 PetriNetUnfolderBase]: 8201/14414 cut-off events. [2024-05-12 11:07:33,958 INFO L125 PetriNetUnfolderBase]: For 1308024/1308024 co-relation queries the response was YES. [2024-05-12 11:07:34,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258772 conditions, 14414 events. 8201/14414 cut-off events. For 1308024/1308024 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 111031 event pairs, 172 based on Foata normal form. 171/14585 useless extension candidates. Maximal degree in co-relation 258539. Up to 6263 conditions per place. [2024-05-12 11:07:34,378 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 1008 selfloop transitions, 1662 changer transitions 48/2719 dead transitions. [2024-05-12 11:07:34,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1003 places, 2719 transitions, 125254 flow [2024-05-12 11:07:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-05-12 11:07:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2024-05-12 11:07:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 781 transitions. [2024-05-12 11:07:34,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3401567944250871 [2024-05-12 11:07:34,388 INFO L175 Difference]: Start difference. First operand has 951 places, 2339 transitions, 109672 flow. Second operand 82 states and 781 transitions. [2024-05-12 11:07:34,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1003 places, 2719 transitions, 125254 flow [2024-05-12 11:08:09,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 967 places, 2719 transitions, 122364 flow, removed 291 selfloop flow, removed 36 redundant places. [2024-05-12 11:08:09,790 INFO L231 Difference]: Finished difference. Result has 993 places, 2431 transitions, 118330 flow [2024-05-12 11:08:09,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=100462, PETRI_DIFFERENCE_MINUEND_PLACES=886, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1452, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=118330, PETRI_PLACES=993, PETRI_TRANSITIONS=2431} [2024-05-12 11:08:09,792 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 963 predicate places. [2024-05-12 11:08:09,792 INFO L495 AbstractCegarLoop]: Abstraction has has 993 places, 2431 transitions, 118330 flow [2024-05-12 11:08:09,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.027777777777778) internal successors, (181), 36 states have internal predecessors, (181), 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 11:08:09,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 11:08:09,793 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] [2024-05-12 11:08:09,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-05-12 11:08:10,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:08:10,002 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-05-12 11:08:10,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 11:08:10,002 INFO L85 PathProgramCache]: Analyzing trace with hash 229456146, now seen corresponding path program 24 times [2024-05-12 11:08:10,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 11:08:10,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688519510] [2024-05-12 11:08:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 11:08:10,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 11:08:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 11:08:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:10,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 11:08:10,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688519510] [2024-05-12 11:08:10,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688519510] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 11:08:10,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667972054] [2024-05-12 11:08:10,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-05-12 11:08:10,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 11:08:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 11:08:10,227 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 11:08:10,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-05-12 11:08:10,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-05-12 11:08:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-05-12 11:08:10,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2024-05-12 11:08:10,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 11:08:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:10,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 11:08:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 11:08:11,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667972054] provided 0 perfect and 2 imperfect interpolant sequences [2024-05-12 11:08:11,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-05-12 11:08:11,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2024-05-12 11:08:11,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745924888] [2024-05-12 11:08:11,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-05-12 11:08:11,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-05-12 11:08:11,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 11:08:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-05-12 11:08:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2024-05-12 11:08:11,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2024-05-12 11:08:11,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 993 places, 2431 transitions, 118330 flow. Second operand has 34 states, 34 states have (on average 5.117647058823529) internal successors, (174), 34 states have internal predecessors, (174), 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 11:08:11,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 11:08:11,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2024-05-12 11:08:11,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand