./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d8006e4b 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/test-easy1.wvr.c ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-d8006e4-m [2024-02-05 10:36:26,723 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:36:26,807 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:36:26,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:36:26,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:36:26,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:36:26,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:36:26,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:36:26,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:36:26,852 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:36:26,852 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:36:26,852 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:36:26,853 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:36:26,854 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:36:26,854 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:36:26,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:36:26,854 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:36:26,854 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:36:26,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:36:26,855 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:36:26,855 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:36:26,855 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:36:26,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:36:26,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:36:26,856 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:36:26,856 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:36:26,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:36:26,856 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:36:26,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:36:26,857 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:36:26,858 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:36:26,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:36:26,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:36:26,858 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:36:26,859 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:36:26,859 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:36:26,859 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:36:26,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:36:26,859 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:36:26,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:36:26,860 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:36:26,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:36:26,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:36:26,860 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:36:27,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:36:27,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:36:27,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:36:27,133 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:36:27,133 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:36:27,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-02-05 10:36:28,217 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:36:28,362 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:36:28,362 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c [2024-02-05 10:36:28,369 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b535fe8b5/e444a0afaffc41408b1c9ef38c37fca2/FLAGaf0d15a42 [2024-02-05 10:36:28,383 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b535fe8b5/e444a0afaffc41408b1c9ef38c37fca2 [2024-02-05 10:36:28,385 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:36:28,386 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:36:28,388 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/test-easy1.wvr.yml/witness.yml [2024-02-05 10:36:28,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:36:28,495 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:36:28,496 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:36:28,496 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:36:28,500 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:36:28,501 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:36:28" (1/2) ... [2024-02-05 10:36:28,502 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6364fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:36:28, skipping insertion in model container [2024-02-05 10:36:28,502 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:36:28" (1/2) ... [2024-02-05 10:36:28,503 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@523f940d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:36:28, skipping insertion in model container [2024-02-05 10:36:28,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:36:28" (2/2) ... [2024-02-05 10:36:28,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6364fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28, skipping insertion in model container [2024-02-05 10:36:28,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:36:28" (2/2) ... [2024-02-05 10:36:28,505 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:36:28,522 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:36:28,524 INFO L101 nessWitnessExtractor]: Location invariant before [L59-L59] ((((((0LL - (long long )x1) + (long long )x2 >= 0LL) && ((long long )x1 + (long long )x2 >= 0LL)) && ((0LL - (long long )x1) - (long long )x2 >= 0LL)) && ((long long )x1 - (long long )x2 >= 0LL)) && (x1 == 0)) && (x2 == 0) [2024-02-05 10:36:28,524 INFO L101 nessWitnessExtractor]: Loop invariant at [L41-L41] (unsigned long )_argptr == 0UL [2024-02-05 10:36:28,524 INFO L101 nessWitnessExtractor]: Location invariant before [L60-L60] x2 == 0 [2024-02-05 10:36:28,524 INFO L101 nessWitnessExtractor]: Location invariant before [L42-L42] (unsigned long )_argptr == 0UL [2024-02-05 10:36:28,524 INFO L101 nessWitnessExtractor]: Location invariant before [L45-L45] (unsigned long )_argptr == 0UL [2024-02-05 10:36:28,524 INFO L101 nessWitnessExtractor]: Location invariant before [L53-L53] (unsigned long )_argptr == 0UL [2024-02-05 10:36:28,525 INFO L101 nessWitnessExtractor]: Loop invariant at [L49-L49] (unsigned long )_argptr == 0UL [2024-02-05 10:36:28,525 INFO L101 nessWitnessExtractor]: Location invariant before [L50-L50] (unsigned long )_argptr == 0UL [2024-02-05 10:36:28,549 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:36:28,677 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1902,1915] [2024-02-05 10:36:28,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:36:28,690 INFO L204 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:36:28,731 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy1.wvr.c[1902,1915] [2024-02-05 10:36:28,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:36:28,742 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:36:28,743 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28 WrapperNode [2024-02-05 10:36:28,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:36:28,744 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:36:28,744 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:36:28,744 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:36:28,749 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 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,755 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 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,769 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2024-02-05 10:36:28,771 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:36:28,771 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:36:28,772 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:36:28,772 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:36:28,780 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,782 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,793 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-05 10:36:28,793 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,815 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,818 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,819 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,820 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:36:28,821 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:36:28,821 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:36:28,821 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:36:28,832 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (1/1) ... [2024-02-05 10:36:28,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:36:28,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:28,867 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-05 10:36:28,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-05 10:36:28,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:36:28,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-05 10:36:28,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-05 10:36:28,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-05 10:36:28,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-05 10:36:28,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:36:28,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:36:28,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:36:28,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:36:28,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:36:28,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:36:28,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:36:28,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:36:28,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:36:28,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:36:28,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:36:28,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:36:28,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:36:28,919 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-05 10:36:29,027 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:36:29,030 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:36:29,236 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:36:29,236 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:36:29,320 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:36:29,320 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-05 10:36:29,320 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:36:29 BoogieIcfgContainer [2024-02-05 10:36:29,321 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:36:29,322 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:36:29,322 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:36:29,325 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:36:29,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:36:28" (1/4) ... [2024-02-05 10:36:29,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3670be6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:36:29, skipping insertion in model container [2024-02-05 10:36:29,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:36:28" (2/4) ... [2024-02-05 10:36:29,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3670be6e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:36:29, skipping insertion in model container [2024-02-05 10:36:29,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:36:28" (3/4) ... [2024-02-05 10:36:29,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3670be6e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:36:29, skipping insertion in model container [2024-02-05 10:36:29,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:36:29" (4/4) ... [2024-02-05 10:36:29,329 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2024-02-05 10:36:29,343 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:36:29,343 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2024-02-05 10:36:29,343 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:36:29,389 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-05 10:36:29,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 37 transitions, 88 flow [2024-02-05 10:36:29,445 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2024-02-05 10:36:29,448 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:36:29,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 4/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-02-05 10:36:29,452 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 37 transitions, 88 flow [2024-02-05 10:36:29,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 34 transitions, 80 flow [2024-02-05 10:36:29,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:36:29,482 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;@30afec2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:36:29,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-02-05 10:36:29,485 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:36:29,486 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:36:29,486 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:36:29,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:29,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:36:29,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:29,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash 7930, now seen corresponding path program 1 times [2024-02-05 10:36:29,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:29,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750000839] [2024-02-05 10:36:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:29,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:29,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:29,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750000839] [2024-02-05 10:36:29,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750000839] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:29,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:29,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:36:29,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915779802] [2024-02-05 10:36:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:29,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:36:29,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:29,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:36:29,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:36:29,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:29,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:29,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:29,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:29,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:29,884 INFO L124 PetriNetUnfolderBase]: 72/167 cut-off events. [2024-02-05 10:36:29,884 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-02-05 10:36:29,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 167 events. 72/167 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 657 event pairs, 38 based on Foata normal form. 31/170 useless extension candidates. Maximal degree in co-relation 246. Up to 122 conditions per place. [2024-02-05 10:36:29,888 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 16 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-02-05 10:36:29,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 110 flow [2024-02-05 10:36:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:36:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:36:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-02-05 10:36:29,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-02-05 10:36:29,901 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 80 flow. Second operand 3 states and 66 transitions. [2024-02-05 10:36:29,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 110 flow [2024-02-05 10:36:29,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-05 10:36:29,908 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 70 flow [2024-02-05 10:36:29,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2024-02-05 10:36:29,913 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2024-02-05 10:36:29,914 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 70 flow [2024-02-05 10:36:29,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:29,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:29,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-05 10:36:29,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:36:29,916 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:29,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:29,918 INFO L85 PathProgramCache]: Analyzing trace with hash 246076, now seen corresponding path program 1 times [2024-02-05 10:36:29,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:29,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255617732] [2024-02-05 10:36:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:29,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:29,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:29,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255617732] [2024-02-05 10:36:29,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255617732] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:29,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:29,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:36:29,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179281082] [2024-02-05 10:36:29,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:29,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:36:29,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:29,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:36:29,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:36:29,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 37 [2024-02-05 10:36:29,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:29,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:29,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 37 [2024-02-05 10:36:29,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:30,026 INFO L124 PetriNetUnfolderBase]: 57/140 cut-off events. [2024-02-05 10:36:30,026 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:36:30,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 140 events. 57/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 544 event pairs, 27 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 236. Up to 95 conditions per place. [2024-02-05 10:36:30,028 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 14 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-02-05 10:36:30,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 100 flow [2024-02-05 10:36:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:36:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:36:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-02-05 10:36:30,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2024-02-05 10:36:30,030 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 70 flow. Second operand 3 states and 68 transitions. [2024-02-05 10:36:30,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 100 flow [2024-02-05 10:36:30,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:30,031 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 68 flow [2024-02-05 10:36:30,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-02-05 10:36:30,040 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -4 predicate places. [2024-02-05 10:36:30,040 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 68 flow [2024-02-05 10:36:30,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:30,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-05 10:36:30,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:36:30,041 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:30,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:30,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1258812071, now seen corresponding path program 1 times [2024-02-05 10:36:30,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:30,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915307317] [2024-02-05 10:36:30,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:30,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:30,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:30,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915307317] [2024-02-05 10:36:30,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915307317] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:30,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:30,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:30,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561213562] [2024-02-05 10:36:30,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:30,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:30,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:30,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:30,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:30,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:30,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:30,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:30,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:30,254 INFO L124 PetriNetUnfolderBase]: 45/126 cut-off events. [2024-02-05 10:36:30,255 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:36:30,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 126 events. 45/126 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 457 event pairs, 2 based on Foata normal form. 8/115 useless extension candidates. Maximal degree in co-relation 203. Up to 65 conditions per place. [2024-02-05 10:36:30,256 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 19 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-02-05 10:36:30,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 115 flow [2024-02-05 10:36:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:36:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:36:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-02-05 10:36:30,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-02-05 10:36:30,258 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 68 flow. Second operand 4 states and 84 transitions. [2024-02-05 10:36:30,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 115 flow [2024-02-05 10:36:30,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 111 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:30,259 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 62 flow [2024-02-05 10:36:30,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2024-02-05 10:36:30,260 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -6 predicate places. [2024-02-05 10:36:30,260 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 62 flow [2024-02-05 10:36:30,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:30,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:30,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:36:30,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:30,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1461571724, now seen corresponding path program 1 times [2024-02-05 10:36:30,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:30,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519571373] [2024-02-05 10:36:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:30,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519571373] [2024-02-05 10:36:30,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519571373] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:30,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:30,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:30,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196449638] [2024-02-05 10:36:30,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:30,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:30,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:30,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:30,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:30,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:30,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:30,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:30,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:30,438 INFO L124 PetriNetUnfolderBase]: 46/115 cut-off events. [2024-02-05 10:36:30,438 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:36:30,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 115 events. 46/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 392 event pairs, 3 based on Foata normal form. 8/108 useless extension candidates. Maximal degree in co-relation 189. Up to 52 conditions per place. [2024-02-05 10:36:30,440 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 21 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-02-05 10:36:30,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 117 flow [2024-02-05 10:36:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:36:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:36:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-02-05 10:36:30,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581081081081081 [2024-02-05 10:36:30,447 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 62 flow. Second operand 4 states and 86 transitions. [2024-02-05 10:36:30,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 117 flow [2024-02-05 10:36:30,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:30,451 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 57 flow [2024-02-05 10:36:30,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=57, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2024-02-05 10:36:30,452 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -8 predicate places. [2024-02-05 10:36:30,453 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 57 flow [2024-02-05 10:36:30,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:30,453 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] [2024-02-05 10:36:30,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:36:30,454 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:30,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:30,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1941363802, now seen corresponding path program 1 times [2024-02-05 10:36:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:30,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716586310] [2024-02-05 10:36:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:30,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:30,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:30,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716586310] [2024-02-05 10:36:30,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716586310] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:30,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:30,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:36:30,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91230459] [2024-02-05 10:36:30,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:30,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:36:30,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:36:30,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:36:30,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 37 [2024-02-05 10:36:30,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:30,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 37 [2024-02-05 10:36:30,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:30,611 INFO L124 PetriNetUnfolderBase]: 65/168 cut-off events. [2024-02-05 10:36:30,611 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-05 10:36:30,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 168 events. 65/168 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 691 event pairs, 9 based on Foata normal form. 1/142 useless extension candidates. Maximal degree in co-relation 282. Up to 86 conditions per place. [2024-02-05 10:36:30,613 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 19 selfloop transitions, 5 changer transitions 1/34 dead transitions. [2024-02-05 10:36:30,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 132 flow [2024-02-05 10:36:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:36:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:36:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-02-05 10:36:30,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7477477477477478 [2024-02-05 10:36:30,614 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 57 flow. Second operand 3 states and 83 transitions. [2024-02-05 10:36:30,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 132 flow [2024-02-05 10:36:30,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 127 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:36:30,616 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 79 flow [2024-02-05 10:36:30,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2024-02-05 10:36:30,617 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -7 predicate places. [2024-02-05 10:36:30,617 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 79 flow [2024-02-05 10:36:30,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:30,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:36:30,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:30,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1891774570, now seen corresponding path program 1 times [2024-02-05 10:36:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054869201] [2024-02-05 10:36:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:30,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054869201] [2024-02-05 10:36:30,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054869201] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:30,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:30,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:36:30,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098156161] [2024-02-05 10:36:30,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:30,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:30,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:30,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:30,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:30,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:30,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:30,766 INFO L124 PetriNetUnfolderBase]: 193/374 cut-off events. [2024-02-05 10:36:30,767 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-02-05 10:36:30,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 374 events. 193/374 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1635 event pairs, 34 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 802. Up to 146 conditions per place. [2024-02-05 10:36:30,770 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 41 selfloop transitions, 10 changer transitions 1/57 dead transitions. [2024-02-05 10:36:30,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 259 flow [2024-02-05 10:36:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:36:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:36:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-02-05 10:36:30,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6810810810810811 [2024-02-05 10:36:30,771 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 79 flow. Second operand 5 states and 126 transitions. [2024-02-05 10:36:30,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 259 flow [2024-02-05 10:36:30,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:36:30,773 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 129 flow [2024-02-05 10:36:30,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-02-05 10:36:30,773 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-02-05 10:36:30,774 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 129 flow [2024-02-05 10:36:30,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:30,774 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:30,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:36:30,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:30,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:30,775 INFO L85 PathProgramCache]: Analyzing trace with hash 318826878, now seen corresponding path program 2 times [2024-02-05 10:36:30,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:30,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89486368] [2024-02-05 10:36:30,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:30,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89486368] [2024-02-05 10:36:30,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89486368] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:30,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:30,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:36:30,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208307445] [2024-02-05 10:36:30,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:30,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:30,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:30,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:30,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:30,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:30,909 INFO L124 PetriNetUnfolderBase]: 173/330 cut-off events. [2024-02-05 10:36:30,909 INFO L125 PetriNetUnfolderBase]: For 248/248 co-relation queries the response was YES. [2024-02-05 10:36:30,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 330 events. 173/330 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1398 event pairs, 29 based on Foata normal form. 4/327 useless extension candidates. Maximal degree in co-relation 899. Up to 107 conditions per place. [2024-02-05 10:36:30,912 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 34 selfloop transitions, 12 changer transitions 5/56 dead transitions. [2024-02-05 10:36:30,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 327 flow [2024-02-05 10:36:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:36:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:36:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-02-05 10:36:30,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432432432432432 [2024-02-05 10:36:30,913 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 129 flow. Second operand 5 states and 119 transitions. [2024-02-05 10:36:30,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 327 flow [2024-02-05 10:36:30,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 327 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:36:30,915 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 217 flow [2024-02-05 10:36:30,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2024-02-05 10:36:30,916 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2024-02-05 10:36:30,916 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 217 flow [2024-02-05 10:36:30,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:30,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:30,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:36:30,917 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:30,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash 803374000, now seen corresponding path program 1 times [2024-02-05 10:36:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:30,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832431544] [2024-02-05 10:36:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832431544] [2024-02-05 10:36:30,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832431544] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:30,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:30,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:36:30,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442707297] [2024-02-05 10:36:30,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:30,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:30,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:30,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:30,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 217 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:30,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:30,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:30,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:31,050 INFO L124 PetriNetUnfolderBase]: 193/387 cut-off events. [2024-02-05 10:36:31,051 INFO L125 PetriNetUnfolderBase]: For 624/624 co-relation queries the response was YES. [2024-02-05 10:36:31,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 387 events. 193/387 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1635 event pairs, 34 based on Foata normal form. 10/388 useless extension candidates. Maximal degree in co-relation 1205. Up to 156 conditions per place. [2024-02-05 10:36:31,053 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 55 selfloop transitions, 10 changer transitions 3/73 dead transitions. [2024-02-05 10:36:31,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 73 transitions, 508 flow [2024-02-05 10:36:31,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:36:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:36:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-02-05 10:36:31,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6918918918918919 [2024-02-05 10:36:31,055 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 217 flow. Second operand 5 states and 128 transitions. [2024-02-05 10:36:31,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 73 transitions, 508 flow [2024-02-05 10:36:31,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 73 transitions, 504 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-02-05 10:36:31,059 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 276 flow [2024-02-05 10:36:31,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=276, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2024-02-05 10:36:31,059 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 13 predicate places. [2024-02-05 10:36:31,060 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 276 flow [2024-02-05 10:36:31,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:31,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:31,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:31,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:36:31,060 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:31,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash 788074152, now seen corresponding path program 2 times [2024-02-05 10:36:31,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:31,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479089904] [2024-02-05 10:36:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:31,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:31,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:31,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479089904] [2024-02-05 10:36:31,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479089904] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:31,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:36:31,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:36:31,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527118269] [2024-02-05 10:36:31,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:31,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:36:31,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:31,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:36:31,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:36:31,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:31,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:31,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:31,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:31,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:31,200 INFO L124 PetriNetUnfolderBase]: 161/322 cut-off events. [2024-02-05 10:36:31,201 INFO L125 PetriNetUnfolderBase]: For 849/849 co-relation queries the response was YES. [2024-02-05 10:36:31,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 322 events. 161/322 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1292 event pairs, 29 based on Foata normal form. 6/323 useless extension candidates. Maximal degree in co-relation 1119. Up to 136 conditions per place. [2024-02-05 10:36:31,203 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 42 selfloop transitions, 11 changer transitions 8/66 dead transitions. [2024-02-05 10:36:31,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 513 flow [2024-02-05 10:36:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:36:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:36:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-02-05 10:36:31,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594594594594595 [2024-02-05 10:36:31,204 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 276 flow. Second operand 5 states and 122 transitions. [2024-02-05 10:36:31,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 513 flow [2024-02-05 10:36:31,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 506 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-02-05 10:36:31,208 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 345 flow [2024-02-05 10:36:31,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2024-02-05 10:36:31,208 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 19 predicate places. [2024-02-05 10:36:31,209 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 345 flow [2024-02-05 10:36:31,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:31,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:31,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:31,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:36:31,209 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:31,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1584761882, now seen corresponding path program 1 times [2024-02-05 10:36:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:31,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039370835] [2024-02-05 10:36:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:31,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039370835] [2024-02-05 10:36:31,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039370835] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320971516] [2024-02-05 10:36:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:31,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:31,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:31,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-05 10:36:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:31,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:31,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:31,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:31,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320971516] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:31,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:31,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-05 10:36:31,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260756346] [2024-02-05 10:36:31,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:31,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-05 10:36:31,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-05 10:36:31,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2024-02-05 10:36:31,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:36:31,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 345 flow. Second operand has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:31,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:31,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:36:31,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:32,144 INFO L124 PetriNetUnfolderBase]: 405/791 cut-off events. [2024-02-05 10:36:32,145 INFO L125 PetriNetUnfolderBase]: For 3167/3167 co-relation queries the response was YES. [2024-02-05 10:36:32,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3108 conditions, 791 events. 405/791 cut-off events. For 3167/3167 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3973 event pairs, 16 based on Foata normal form. 45/834 useless extension candidates. Maximal degree in co-relation 3058. Up to 192 conditions per place. [2024-02-05 10:36:32,151 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 112 selfloop transitions, 54 changer transitions 11/182 dead transitions. [2024-02-05 10:36:32,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 182 transitions, 1505 flow [2024-02-05 10:36:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-05 10:36:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-05 10:36:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 405 transitions. [2024-02-05 10:36:32,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472972972972973 [2024-02-05 10:36:32,153 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 345 flow. Second operand 20 states and 405 transitions. [2024-02-05 10:36:32,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 182 transitions, 1505 flow [2024-02-05 10:36:32,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 182 transitions, 1473 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-02-05 10:36:32,161 INFO L231 Difference]: Finished difference. Result has 88 places, 89 transitions, 994 flow [2024-02-05 10:36:32,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=994, PETRI_PLACES=88, PETRI_TRANSITIONS=89} [2024-02-05 10:36:32,161 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 51 predicate places. [2024-02-05 10:36:32,162 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 89 transitions, 994 flow [2024-02-05 10:36:32,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:32,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:32,162 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:32,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:32,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-02-05 10:36:32,374 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:32,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash 925573148, now seen corresponding path program 2 times [2024-02-05 10:36:32,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:32,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557547324] [2024-02-05 10:36:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:32,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:32,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:32,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557547324] [2024-02-05 10:36:32,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557547324] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:32,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800697510] [2024-02-05 10:36:32,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:36:32,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:32,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:32,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-05 10:36:32,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:36:32,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:32,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-05 10:36:32,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:32,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:32,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800697510] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:32,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:32,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 10 [2024-02-05 10:36:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217481881] [2024-02-05 10:36:32,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:32,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-05 10:36:32,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-05 10:36:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-02-05 10:36:32,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:36:32,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 89 transitions, 994 flow. Second operand has 10 states, 10 states have (on average 17.3) internal successors, (173), 10 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) [2024-02-05 10:36:32,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:32,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:36:32,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:33,028 INFO L124 PetriNetUnfolderBase]: 597/1179 cut-off events. [2024-02-05 10:36:33,028 INFO L125 PetriNetUnfolderBase]: For 8483/8483 co-relation queries the response was YES. [2024-02-05 10:36:33,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5637 conditions, 1179 events. 597/1179 cut-off events. For 8483/8483 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6609 event pairs, 62 based on Foata normal form. 27/1204 useless extension candidates. Maximal degree in co-relation 5570. Up to 626 conditions per place. [2024-02-05 10:36:33,037 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 142 selfloop transitions, 48 changer transitions 1/196 dead transitions. [2024-02-05 10:36:33,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 196 transitions, 2263 flow [2024-02-05 10:36:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-05 10:36:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-05 10:36:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-02-05 10:36:33,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878378378378378 [2024-02-05 10:36:33,056 INFO L175 Difference]: Start difference. First operand has 88 places, 89 transitions, 994 flow. Second operand 12 states and 261 transitions. [2024-02-05 10:36:33,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 196 transitions, 2263 flow [2024-02-05 10:36:33,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 196 transitions, 2101 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-02-05 10:36:33,121 INFO L231 Difference]: Finished difference. Result has 101 places, 128 transitions, 1535 flow [2024-02-05 10:36:33,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1535, PETRI_PLACES=101, PETRI_TRANSITIONS=128} [2024-02-05 10:36:33,121 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 64 predicate places. [2024-02-05 10:36:33,122 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 128 transitions, 1535 flow [2024-02-05 10:36:33,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.3) internal successors, (173), 10 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) [2024-02-05 10:36:33,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:33,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:33,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:33,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-02-05 10:36:33,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:33,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:33,323 INFO L85 PathProgramCache]: Analyzing trace with hash 348708728, now seen corresponding path program 3 times [2024-02-05 10:36:33,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:33,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699970488] [2024-02-05 10:36:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:33,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:33,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:33,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:33,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:33,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699970488] [2024-02-05 10:36:33,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699970488] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:33,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175996077] [2024-02-05 10:36:33,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:36:33,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:33,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:33,419 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:33,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-05 10:36:33,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-05 10:36:33,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:33,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-05 10:36:33,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:33,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:33,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175996077] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:33,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:33,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-02-05 10:36:33,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968672864] [2024-02-05 10:36:33,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:33,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-05 10:36:33,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:33,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-05 10:36:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-02-05 10:36:33,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:33,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 128 transitions, 1535 flow. Second operand has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:33,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:33,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:33,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:33,867 INFO L124 PetriNetUnfolderBase]: 751/1479 cut-off events. [2024-02-05 10:36:33,867 INFO L125 PetriNetUnfolderBase]: For 12355/12355 co-relation queries the response was YES. [2024-02-05 10:36:33,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7302 conditions, 1479 events. 751/1479 cut-off events. For 12355/12355 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8653 event pairs, 69 based on Foata normal form. 8/1483 useless extension candidates. Maximal degree in co-relation 7229. Up to 385 conditions per place. [2024-02-05 10:36:33,879 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 105 selfloop transitions, 88 changer transitions 5/203 dead transitions. [2024-02-05 10:36:33,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 203 transitions, 2663 flow [2024-02-05 10:36:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-05 10:36:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-05 10:36:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-02-05 10:36:33,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5995085995085995 [2024-02-05 10:36:33,880 INFO L175 Difference]: Start difference. First operand has 101 places, 128 transitions, 1535 flow. Second operand 11 states and 244 transitions. [2024-02-05 10:36:33,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 203 transitions, 2663 flow [2024-02-05 10:36:33,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 203 transitions, 2603 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-02-05 10:36:33,929 INFO L231 Difference]: Finished difference. Result has 115 places, 152 transitions, 2233 flow [2024-02-05 10:36:33,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2233, PETRI_PLACES=115, PETRI_TRANSITIONS=152} [2024-02-05 10:36:33,930 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 78 predicate places. [2024-02-05 10:36:33,930 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 152 transitions, 2233 flow [2024-02-05 10:36:33,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:33,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:33,931 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:33,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:34,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:34,143 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:34,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2041822106, now seen corresponding path program 4 times [2024-02-05 10:36:34,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:34,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717862799] [2024-02-05 10:36:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:34,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:34,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717862799] [2024-02-05 10:36:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717862799] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335590411] [2024-02-05 10:36:34,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:36:34,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:34,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:34,232 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:34,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-05 10:36:34,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:36:34,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:34,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-05 10:36:34,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:34,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:34,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335590411] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:34,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:34,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-02-05 10:36:34,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570003780] [2024-02-05 10:36:34,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:34,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-05 10:36:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-05 10:36:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-02-05 10:36:34,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:36:34,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 152 transitions, 2233 flow. Second operand has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:34,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:36:34,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:34,795 INFO L124 PetriNetUnfolderBase]: 832/1677 cut-off events. [2024-02-05 10:36:34,796 INFO L125 PetriNetUnfolderBase]: For 20528/20528 co-relation queries the response was YES. [2024-02-05 10:36:34,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9202 conditions, 1677 events. 832/1677 cut-off events. For 20528/20528 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10323 event pairs, 32 based on Foata normal form. 10/1685 useless extension candidates. Maximal degree in co-relation 9122. Up to 363 conditions per place. [2024-02-05 10:36:34,809 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 146 selfloop transitions, 112 changer transitions 0/263 dead transitions. [2024-02-05 10:36:34,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 263 transitions, 3536 flow [2024-02-05 10:36:34,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-05 10:36:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-05 10:36:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 335 transitions. [2024-02-05 10:36:34,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658783783783784 [2024-02-05 10:36:34,811 INFO L175 Difference]: Start difference. First operand has 115 places, 152 transitions, 2233 flow. Second operand 16 states and 335 transitions. [2024-02-05 10:36:34,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 263 transitions, 3536 flow [2024-02-05 10:36:34,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 263 transitions, 3334 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-02-05 10:36:34,881 INFO L231 Difference]: Finished difference. Result has 128 places, 174 transitions, 2768 flow [2024-02-05 10:36:34,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2768, PETRI_PLACES=128, PETRI_TRANSITIONS=174} [2024-02-05 10:36:34,882 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 91 predicate places. [2024-02-05 10:36:34,882 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 174 transitions, 2768 flow [2024-02-05 10:36:34,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:34,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:34,883 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:34,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:35,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:35,097 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:35,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:35,097 INFO L85 PathProgramCache]: Analyzing trace with hash -556636244, now seen corresponding path program 5 times [2024-02-05 10:36:35,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:35,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674583927] [2024-02-05 10:36:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:35,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:35,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:35,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674583927] [2024-02-05 10:36:35,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674583927] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102816158] [2024-02-05 10:36:35,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:36:35,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:35,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:35,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:35,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-05 10:36:35,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:36:35,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:35,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-05 10:36:35,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:35,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102816158] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:35,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:35,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-02-05 10:36:35,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009032621] [2024-02-05 10:36:35,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:35,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-05 10:36:35,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-05 10:36:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-02-05 10:36:35,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:35,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 174 transitions, 2768 flow. Second operand has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:35,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:35,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:35,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:35,723 INFO L124 PetriNetUnfolderBase]: 932/1911 cut-off events. [2024-02-05 10:36:35,723 INFO L125 PetriNetUnfolderBase]: For 27090/27090 co-relation queries the response was YES. [2024-02-05 10:36:35,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10779 conditions, 1911 events. 932/1911 cut-off events. For 27090/27090 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12088 event pairs, 109 based on Foata normal form. 36/1943 useless extension candidates. Maximal degree in co-relation 10699. Up to 527 conditions per place. [2024-02-05 10:36:35,739 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 163 selfloop transitions, 85 changer transitions 14/267 dead transitions. [2024-02-05 10:36:35,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 267 transitions, 4305 flow [2024-02-05 10:36:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-05 10:36:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-05 10:36:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-02-05 10:36:35,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6405405405405405 [2024-02-05 10:36:35,741 INFO L175 Difference]: Start difference. First operand has 128 places, 174 transitions, 2768 flow. Second operand 10 states and 237 transitions. [2024-02-05 10:36:35,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 267 transitions, 4305 flow [2024-02-05 10:36:35,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 267 transitions, 4145 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-02-05 10:36:35,815 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 3291 flow [2024-02-05 10:36:35,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3291, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2024-02-05 10:36:35,816 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 100 predicate places. [2024-02-05 10:36:35,816 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 3291 flow [2024-02-05 10:36:35,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.9) internal successors, (189), 10 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:35,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:35,816 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:35,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-05 10:36:36,028 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:36,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1595040896, now seen corresponding path program 6 times [2024-02-05 10:36:36,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:36,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394163322] [2024-02-05 10:36:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:36,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:36,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394163322] [2024-02-05 10:36:36,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394163322] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:36,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784587137] [2024-02-05 10:36:36,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:36:36,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:36,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:36,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-05 10:36:36,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-05 10:36:36,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:36,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-05 10:36:36,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:36,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:36,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784587137] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:36,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:36,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-02-05 10:36:36,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563857252] [2024-02-05 10:36:36,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:36,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-05 10:36:36,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-05 10:36:36,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-02-05 10:36:36,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:36:36,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 3291 flow. Second operand has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:36,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:36,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:36:36,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:36,698 INFO L124 PetriNetUnfolderBase]: 972/2034 cut-off events. [2024-02-05 10:36:36,698 INFO L125 PetriNetUnfolderBase]: For 27352/27352 co-relation queries the response was YES. [2024-02-05 10:36:36,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11526 conditions, 2034 events. 972/2034 cut-off events. For 27352/27352 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13236 event pairs, 76 based on Foata normal form. 8/2040 useless extension candidates. Maximal degree in co-relation 11440. Up to 567 conditions per place. [2024-02-05 10:36:36,726 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 186 selfloop transitions, 115 changer transitions 0/306 dead transitions. [2024-02-05 10:36:36,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 306 transitions, 4893 flow [2024-02-05 10:36:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-05 10:36:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-05 10:36:36,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 327 transitions. [2024-02-05 10:36:36,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523648648648649 [2024-02-05 10:36:36,729 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 3291 flow. Second operand 16 states and 327 transitions. [2024-02-05 10:36:36,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 306 transitions, 4893 flow [2024-02-05 10:36:36,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 306 transitions, 4685 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-02-05 10:36:36,825 INFO L231 Difference]: Finished difference. Result has 151 places, 217 transitions, 3894 flow [2024-02-05 10:36:36,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3087, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3894, PETRI_PLACES=151, PETRI_TRANSITIONS=217} [2024-02-05 10:36:36,826 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 114 predicate places. [2024-02-05 10:36:36,826 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 217 transitions, 3894 flow [2024-02-05 10:36:36,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:36,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:36,827 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:36,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:37,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-05 10:36:37,039 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:37,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2018774296, now seen corresponding path program 7 times [2024-02-05 10:36:37,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:37,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166025800] [2024-02-05 10:36:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-02-05 10:36:37,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:37,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166025800] [2024-02-05 10:36:37,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166025800] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:37,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393823718] [2024-02-05 10:36:37,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:36:37,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:37,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:37,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:37,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-05 10:36:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:37,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-05 10:36:37,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:37,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:37,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393823718] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:37,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:37,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2024-02-05 10:36:37,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028624444] [2024-02-05 10:36:37,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:37,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-05 10:36:37,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:37,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-05 10:36:37,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-02-05 10:36:37,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:36:37,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 217 transitions, 3894 flow. Second operand has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:37,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:37,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:36:37,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:37,720 INFO L124 PetriNetUnfolderBase]: 938/1957 cut-off events. [2024-02-05 10:36:37,720 INFO L125 PetriNetUnfolderBase]: For 24520/24520 co-relation queries the response was YES. [2024-02-05 10:36:37,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11233 conditions, 1957 events. 938/1957 cut-off events. For 24520/24520 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 12558 event pairs, 131 based on Foata normal form. 12/1965 useless extension candidates. Maximal degree in co-relation 11145. Up to 653 conditions per place. [2024-02-05 10:36:37,737 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 166 selfloop transitions, 99 changer transitions 3/273 dead transitions. [2024-02-05 10:36:37,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 273 transitions, 4977 flow [2024-02-05 10:36:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-05 10:36:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-05 10:36:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-02-05 10:36:37,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2024-02-05 10:36:37,740 INFO L175 Difference]: Start difference. First operand has 151 places, 217 transitions, 3894 flow. Second operand 12 states and 234 transitions. [2024-02-05 10:36:37,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 273 transitions, 4977 flow [2024-02-05 10:36:37,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 273 transitions, 4875 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-02-05 10:36:37,833 INFO L231 Difference]: Finished difference. Result has 162 places, 225 transitions, 4196 flow [2024-02-05 10:36:37,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3714, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4196, PETRI_PLACES=162, PETRI_TRANSITIONS=225} [2024-02-05 10:36:37,833 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 125 predicate places. [2024-02-05 10:36:37,834 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 225 transitions, 4196 flow [2024-02-05 10:36:37,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.727272727272727) internal successors, (184), 11 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:37,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:37,834 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:37,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:38,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:38,049 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:38,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1040970286, now seen corresponding path program 8 times [2024-02-05 10:36:38,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:38,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204180305] [2024-02-05 10:36:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:38,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:38,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204180305] [2024-02-05 10:36:38,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204180305] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:38,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933712700] [2024-02-05 10:36:38,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:36:38,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:38,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:38,169 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:38,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-05 10:36:38,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:36:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:38,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:38,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:38,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-05 10:36:38,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933712700] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:38,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-05 10:36:38,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-02-05 10:36:38,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994058736] [2024-02-05 10:36:38,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:38,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-05 10:36:38,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:38,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-05 10:36:38,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-02-05 10:36:38,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:38,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 225 transitions, 4196 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:38,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:38,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:38,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:38,665 INFO L124 PetriNetUnfolderBase]: 940/1960 cut-off events. [2024-02-05 10:36:38,665 INFO L125 PetriNetUnfolderBase]: For 27702/27702 co-relation queries the response was YES. [2024-02-05 10:36:38,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11735 conditions, 1960 events. 940/1960 cut-off events. For 27702/27702 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12713 event pairs, 69 based on Foata normal form. 4/1962 useless extension candidates. Maximal degree in co-relation 11641. Up to 662 conditions per place. [2024-02-05 10:36:38,681 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 121 selfloop transitions, 101 changer transitions 53/280 dead transitions. [2024-02-05 10:36:38,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 280 transitions, 5307 flow [2024-02-05 10:36:38,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-05 10:36:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-05 10:36:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-02-05 10:36:38,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047297297297297 [2024-02-05 10:36:38,682 INFO L175 Difference]: Start difference. First operand has 162 places, 225 transitions, 4196 flow. Second operand 8 states and 179 transitions. [2024-02-05 10:36:38,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 280 transitions, 5307 flow [2024-02-05 10:36:38,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 280 transitions, 5209 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-02-05 10:36:38,778 INFO L231 Difference]: Finished difference. Result has 168 places, 194 transitions, 3763 flow [2024-02-05 10:36:38,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3763, PETRI_PLACES=168, PETRI_TRANSITIONS=194} [2024-02-05 10:36:38,779 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 131 predicate places. [2024-02-05 10:36:38,779 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 194 transitions, 3763 flow [2024-02-05 10:36:38,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:38,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:38,779 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:38,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:38,991 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,SelfDestructingSolverStorable16 [2024-02-05 10:36:38,991 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:38,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:38,992 INFO L85 PathProgramCache]: Analyzing trace with hash 620630126, now seen corresponding path program 9 times [2024-02-05 10:36:38,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:38,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527693956] [2024-02-05 10:36:38,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:38,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:39,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:39,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527693956] [2024-02-05 10:36:39,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527693956] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:39,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822800231] [2024-02-05 10:36:39,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:36:39,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:39,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:39,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:39,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-05 10:36:39,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-05 10:36:39,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:39,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:39,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:39,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:39,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822800231] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:39,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:39,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-02-05 10:36:39,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417215416] [2024-02-05 10:36:39,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:39,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-05 10:36:39,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:39,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-05 10:36:39,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2024-02-05 10:36:39,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:39,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 194 transitions, 3763 flow. Second operand has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:39,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:39,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:39,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:39,946 INFO L124 PetriNetUnfolderBase]: 788/1661 cut-off events. [2024-02-05 10:36:39,947 INFO L125 PetriNetUnfolderBase]: For 30873/30873 co-relation queries the response was YES. [2024-02-05 10:36:39,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10682 conditions, 1661 events. 788/1661 cut-off events. For 30873/30873 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10321 event pairs, 46 based on Foata normal form. 36/1695 useless extension candidates. Maximal degree in co-relation 10588. Up to 582 conditions per place. [2024-02-05 10:36:39,959 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 82 selfloop transitions, 170 changer transitions 49/306 dead transitions. [2024-02-05 10:36:39,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 306 transitions, 5794 flow [2024-02-05 10:36:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-05 10:36:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-05 10:36:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 426 transitions. [2024-02-05 10:36:39,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482625482625483 [2024-02-05 10:36:39,961 INFO L175 Difference]: Start difference. First operand has 168 places, 194 transitions, 3763 flow. Second operand 21 states and 426 transitions. [2024-02-05 10:36:39,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 306 transitions, 5794 flow [2024-02-05 10:36:40,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 306 transitions, 5298 flow, removed 54 selfloop flow, removed 12 redundant places. [2024-02-05 10:36:40,045 INFO L231 Difference]: Finished difference. Result has 180 places, 219 transitions, 4380 flow [2024-02-05 10:36:40,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4380, PETRI_PLACES=180, PETRI_TRANSITIONS=219} [2024-02-05 10:36:40,046 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 143 predicate places. [2024-02-05 10:36:40,046 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 219 transitions, 4380 flow [2024-02-05 10:36:40,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.833333333333332) internal successors, (321), 18 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:40,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:40,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:40,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-02-05 10:36:40,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-05 10:36:40,276 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:40,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:40,276 INFO L85 PathProgramCache]: Analyzing trace with hash 437735186, now seen corresponding path program 10 times [2024-02-05 10:36:40,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:40,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231234647] [2024-02-05 10:36:40,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:40,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:40,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:40,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:40,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231234647] [2024-02-05 10:36:40,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231234647] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:40,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914320679] [2024-02-05 10:36:40,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:36:40,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:40,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:40,417 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:40,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-05 10:36:40,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:36:40,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:40,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:36:40,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:40,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-02-05 10:36:40,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914320679] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:40,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:40,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 14 [2024-02-05 10:36:40,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065196787] [2024-02-05 10:36:40,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:40,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:36:40,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:36:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:36:40,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:36:40,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 219 transitions, 4380 flow. Second operand has 14 states, 14 states have (on average 16.642857142857142) internal successors, (233), 14 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:40,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:40,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:36:40,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:41,330 INFO L124 PetriNetUnfolderBase]: 1160/2355 cut-off events. [2024-02-05 10:36:41,330 INFO L125 PetriNetUnfolderBase]: For 46005/46005 co-relation queries the response was YES. [2024-02-05 10:36:41,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16800 conditions, 2355 events. 1160/2355 cut-off events. For 46005/46005 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14934 event pairs, 106 based on Foata normal form. 47/2400 useless extension candidates. Maximal degree in co-relation 16704. Up to 687 conditions per place. [2024-02-05 10:36:41,350 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 242 selfloop transitions, 202 changer transitions 17/466 dead transitions. [2024-02-05 10:36:41,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 466 transitions, 9691 flow [2024-02-05 10:36:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-02-05 10:36:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-02-05 10:36:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 446 transitions. [2024-02-05 10:36:41,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5240893066980024 [2024-02-05 10:36:41,352 INFO L175 Difference]: Start difference. First operand has 180 places, 219 transitions, 4380 flow. Second operand 23 states and 446 transitions. [2024-02-05 10:36:41,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 466 transitions, 9691 flow [2024-02-05 10:36:41,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 466 transitions, 9100 flow, removed 133 selfloop flow, removed 20 redundant places. [2024-02-05 10:36:41,480 INFO L231 Difference]: Finished difference. Result has 191 places, 344 transitions, 7514 flow [2024-02-05 10:36:41,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4039, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7514, PETRI_PLACES=191, PETRI_TRANSITIONS=344} [2024-02-05 10:36:41,481 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 154 predicate places. [2024-02-05 10:36:41,481 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 344 transitions, 7514 flow [2024-02-05 10:36:41,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.642857142857142) internal successors, (233), 14 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:41,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:41,482 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:41,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:41,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:41,693 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:41,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash -332826790, now seen corresponding path program 11 times [2024-02-05 10:36:41,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:41,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132927918] [2024-02-05 10:36:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:41,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:41,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132927918] [2024-02-05 10:36:41,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132927918] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:41,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854744883] [2024-02-05 10:36:41,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:36:41,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:41,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:41,807 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:41,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-05 10:36:41,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-02-05 10:36:41,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:41,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:41,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:41,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-05 10:36:41,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854744883] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:41,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-05 10:36:41,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-02-05 10:36:41,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69847087] [2024-02-05 10:36:41,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:41,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-05 10:36:41,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:41,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-05 10:36:41,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2024-02-05 10:36:41,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:41,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 344 transitions, 7514 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:41,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:41,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:41,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:42,328 INFO L124 PetriNetUnfolderBase]: 1120/2299 cut-off events. [2024-02-05 10:36:42,329 INFO L125 PetriNetUnfolderBase]: For 45499/45499 co-relation queries the response was YES. [2024-02-05 10:36:42,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17229 conditions, 2299 events. 1120/2299 cut-off events. For 45499/45499 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14522 event pairs, 71 based on Foata normal form. 6/2300 useless extension candidates. Maximal degree in co-relation 17134. Up to 587 conditions per place. [2024-02-05 10:36:42,345 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 157 selfloop transitions, 139 changer transitions 78/379 dead transitions. [2024-02-05 10:36:42,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 379 transitions, 8757 flow [2024-02-05 10:36:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-05 10:36:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-05 10:36:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-02-05 10:36:42,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641891891891891 [2024-02-05 10:36:42,347 INFO L175 Difference]: Start difference. First operand has 191 places, 344 transitions, 7514 flow. Second operand 8 states and 167 transitions. [2024-02-05 10:36:42,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 379 transitions, 8757 flow [2024-02-05 10:36:42,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 379 transitions, 8486 flow, removed 124 selfloop flow, removed 5 redundant places. [2024-02-05 10:36:42,503 INFO L231 Difference]: Finished difference. Result has 194 places, 280 transitions, 6067 flow [2024-02-05 10:36:42,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7237, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6067, PETRI_PLACES=194, PETRI_TRANSITIONS=280} [2024-02-05 10:36:42,504 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 157 predicate places. [2024-02-05 10:36:42,504 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 280 transitions, 6067 flow [2024-02-05 10:36:42,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:42,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:42,504 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:42,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:42,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:42,716 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:42,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash -193269004, now seen corresponding path program 12 times [2024-02-05 10:36:42,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:42,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008248486] [2024-02-05 10:36:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:42,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:42,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008248486] [2024-02-05 10:36:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008248486] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:42,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168693098] [2024-02-05 10:36:42,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:36:42,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:42,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:42,811 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:42,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-05 10:36:42,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-02-05 10:36:42,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:42,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:42,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:42,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-05 10:36:42,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168693098] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:42,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-05 10:36:42,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2024-02-05 10:36:42,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699236914] [2024-02-05 10:36:42,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:42,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-05 10:36:42,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:42,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-05 10:36:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-02-05 10:36:42,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:42,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 280 transitions, 6067 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:42,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:42,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:42,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:43,321 INFO L124 PetriNetUnfolderBase]: 966/2027 cut-off events. [2024-02-05 10:36:43,321 INFO L125 PetriNetUnfolderBase]: For 44511/44511 co-relation queries the response was YES. [2024-02-05 10:36:43,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15843 conditions, 2027 events. 966/2027 cut-off events. For 44511/44511 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12241 event pairs, 35 based on Foata normal form. 5/2027 useless extension candidates. Maximal degree in co-relation 15748. Up to 455 conditions per place. [2024-02-05 10:36:43,338 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 63 selfloop transitions, 351 changer transitions 11/430 dead transitions. [2024-02-05 10:36:43,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 430 transitions, 9921 flow [2024-02-05 10:36:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-05 10:36:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-05 10:36:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-02-05 10:36:43,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547911547911548 [2024-02-05 10:36:43,340 INFO L175 Difference]: Start difference. First operand has 194 places, 280 transitions, 6067 flow. Second operand 11 states and 223 transitions. [2024-02-05 10:36:43,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 430 transitions, 9921 flow [2024-02-05 10:36:43,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 430 transitions, 9158 flow, removed 26 selfloop flow, removed 13 redundant places. [2024-02-05 10:36:43,473 INFO L231 Difference]: Finished difference. Result has 184 places, 400 transitions, 9199 flow [2024-02-05 10:36:43,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5557, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9199, PETRI_PLACES=184, PETRI_TRANSITIONS=400} [2024-02-05 10:36:43,474 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 147 predicate places. [2024-02-05 10:36:43,474 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 400 transitions, 9199 flow [2024-02-05 10:36:43,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:43,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:43,474 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:43,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:43,686 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,SelfDestructingSolverStorable20 [2024-02-05 10:36:43,686 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:43,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:43,687 INFO L85 PathProgramCache]: Analyzing trace with hash -663323330, now seen corresponding path program 13 times [2024-02-05 10:36:43,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:43,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619574474] [2024-02-05 10:36:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:43,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:43,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:43,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619574474] [2024-02-05 10:36:43,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619574474] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:43,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886916814] [2024-02-05 10:36:43,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:36:43,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:43,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:43,790 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:43,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-05 10:36:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:43,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-05 10:36:43,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:44,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:44,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886916814] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:44,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:44,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-02-05 10:36:44,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676864657] [2024-02-05 10:36:44,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:44,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:36:44,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:44,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:36:44,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:36:44,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:44,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 400 transitions, 9199 flow. Second operand has 22 states, 22 states have (on average 17.727272727272727) internal successors, (390), 22 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:44,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:44,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:44,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:45,101 INFO L124 PetriNetUnfolderBase]: 1267/2652 cut-off events. [2024-02-05 10:36:45,102 INFO L125 PetriNetUnfolderBase]: For 60972/60972 co-relation queries the response was YES. [2024-02-05 10:36:45,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22027 conditions, 2652 events. 1267/2652 cut-off events. For 60972/60972 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 17098 event pairs, 54 based on Foata normal form. 25/2673 useless extension candidates. Maximal degree in co-relation 21957. Up to 914 conditions per place. [2024-02-05 10:36:45,127 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 298 selfloop transitions, 331 changer transitions 42/676 dead transitions. [2024-02-05 10:36:45,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 676 transitions, 15926 flow [2024-02-05 10:36:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-05 10:36:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-05 10:36:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 699 transitions. [2024-02-05 10:36:45,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5556438791732909 [2024-02-05 10:36:45,129 INFO L175 Difference]: Start difference. First operand has 184 places, 400 transitions, 9199 flow. Second operand 34 states and 699 transitions. [2024-02-05 10:36:45,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 676 transitions, 15926 flow [2024-02-05 10:36:45,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 676 transitions, 15523 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-02-05 10:36:45,352 INFO L231 Difference]: Finished difference. Result has 228 places, 542 transitions, 13835 flow [2024-02-05 10:36:45,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=8939, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=13835, PETRI_PLACES=228, PETRI_TRANSITIONS=542} [2024-02-05 10:36:45,352 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 191 predicate places. [2024-02-05 10:36:45,353 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 542 transitions, 13835 flow [2024-02-05 10:36:45,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.727272727272727) internal successors, (390), 22 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:45,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:45,353 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:45,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:45,564 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,SelfDestructingSolverStorable21 [2024-02-05 10:36:45,565 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:45,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash -361236804, now seen corresponding path program 14 times [2024-02-05 10:36:45,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:45,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450087110] [2024-02-05 10:36:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:45,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:45,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:45,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450087110] [2024-02-05 10:36:45,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450087110] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:45,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337680085] [2024-02-05 10:36:45,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:36:45,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:45,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:45,646 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:45,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-05 10:36:45,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:36:45,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:45,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:45,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:45,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:45,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337680085] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:45,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:45,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-05 10:36:45,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562519626] [2024-02-05 10:36:45,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:45,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-05 10:36:45,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:45,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-05 10:36:45,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2024-02-05 10:36:45,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:36:45,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 542 transitions, 13835 flow. Second operand has 16 states, 16 states have (on average 16.3125) internal successors, (261), 16 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:45,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:45,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:36:45,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:46,852 INFO L124 PetriNetUnfolderBase]: 1461/3032 cut-off events. [2024-02-05 10:36:46,852 INFO L125 PetriNetUnfolderBase]: For 92736/92736 co-relation queries the response was YES. [2024-02-05 10:36:46,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27774 conditions, 3032 events. 1461/3032 cut-off events. For 92736/92736 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 19553 event pairs, 54 based on Foata normal form. 22/3052 useless extension candidates. Maximal degree in co-relation 27666. Up to 725 conditions per place. [2024-02-05 10:36:46,892 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 307 selfloop transitions, 450 changer transitions 11/773 dead transitions. [2024-02-05 10:36:46,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 773 transitions, 20535 flow [2024-02-05 10:36:46,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-05 10:36:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-05 10:36:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 527 transitions. [2024-02-05 10:36:46,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086872586872587 [2024-02-05 10:36:46,894 INFO L175 Difference]: Start difference. First operand has 228 places, 542 transitions, 13835 flow. Second operand 28 states and 527 transitions. [2024-02-05 10:36:46,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 773 transitions, 20535 flow [2024-02-05 10:36:47,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 773 transitions, 19961 flow, removed 259 selfloop flow, removed 10 redundant places. [2024-02-05 10:36:47,226 INFO L231 Difference]: Finished difference. Result has 253 places, 658 transitions, 18259 flow [2024-02-05 10:36:47,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=13376, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=348, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18259, PETRI_PLACES=253, PETRI_TRANSITIONS=658} [2024-02-05 10:36:47,227 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 216 predicate places. [2024-02-05 10:36:47,227 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 658 transitions, 18259 flow [2024-02-05 10:36:47,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.3125) internal successors, (261), 16 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:47,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:47,227 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:47,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-02-05 10:36:47,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:47,439 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:47,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:47,439 INFO L85 PathProgramCache]: Analyzing trace with hash -539471802, now seen corresponding path program 15 times [2024-02-05 10:36:47,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:47,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257867265] [2024-02-05 10:36:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:47,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:47,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:47,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257867265] [2024-02-05 10:36:47,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257867265] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:47,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469076936] [2024-02-05 10:36:47,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:36:47,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:47,509 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:47,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-05 10:36:47,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-05 10:36:47,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:47,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:47,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-02-05 10:36:47,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-05 10:36:47,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469076936] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:47,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-05 10:36:47,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 11 [2024-02-05 10:36:47,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246049707] [2024-02-05 10:36:47,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:47,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-05 10:36:47,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:47,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-05 10:36:47,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-02-05 10:36:47,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:47,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 658 transitions, 18259 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:47,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:47,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:47,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:48,431 INFO L124 PetriNetUnfolderBase]: 1446/2973 cut-off events. [2024-02-05 10:36:48,431 INFO L125 PetriNetUnfolderBase]: For 94613/94613 co-relation queries the response was YES. [2024-02-05 10:36:48,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28612 conditions, 2973 events. 1446/2973 cut-off events. For 94613/94613 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 18953 event pairs, 29 based on Foata normal form. 15/2983 useless extension candidates. Maximal degree in co-relation 28495. Up to 723 conditions per place. [2024-02-05 10:36:48,454 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 32 selfloop transitions, 23 changer transitions 622/682 dead transitions. [2024-02-05 10:36:48,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 682 transitions, 19946 flow [2024-02-05 10:36:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-05 10:36:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-05 10:36:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-02-05 10:36:48,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-02-05 10:36:48,463 INFO L175 Difference]: Start difference. First operand has 253 places, 658 transitions, 18259 flow. Second operand 11 states and 222 transitions. [2024-02-05 10:36:48,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 682 transitions, 19946 flow [2024-02-05 10:36:48,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 682 transitions, 19278 flow, removed 277 selfloop flow, removed 11 redundant places. [2024-02-05 10:36:48,897 INFO L231 Difference]: Finished difference. Result has 253 places, 56 transitions, 1007 flow [2024-02-05 10:36:48,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=17587, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1007, PETRI_PLACES=253, PETRI_TRANSITIONS=56} [2024-02-05 10:36:48,898 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 216 predicate places. [2024-02-05 10:36:48,898 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 56 transitions, 1007 flow [2024-02-05 10:36:48,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:48,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:48,899 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:48,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:49,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:49,111 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:49,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:49,112 INFO L85 PathProgramCache]: Analyzing trace with hash -259439360, now seen corresponding path program 16 times [2024-02-05 10:36:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:49,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731502373] [2024-02-05 10:36:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:49,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:36:49,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731502373] [2024-02-05 10:36:49,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731502373] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187523275] [2024-02-05 10:36:49,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:36:49,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:49,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:49,231 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:49,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-05 10:36:49,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:36:49,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:49,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:49,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:49,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:49,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187523275] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:49,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:49,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-02-05 10:36:49,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782948394] [2024-02-05 10:36:49,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:49,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-05 10:36:49,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:49,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-05 10:36:49,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-02-05 10:36:49,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:36:49,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 56 transitions, 1007 flow. Second operand has 16 states, 16 states have (on average 16.3125) internal successors, (261), 16 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:49,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:49,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:36:49,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:49,823 INFO L124 PetriNetUnfolderBase]: 191/490 cut-off events. [2024-02-05 10:36:49,823 INFO L125 PetriNetUnfolderBase]: For 9909/9909 co-relation queries the response was YES. [2024-02-05 10:36:49,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3453 conditions, 490 events. 191/490 cut-off events. For 9909/9909 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2137 event pairs, 12 based on Foata normal form. 6/495 useless extension candidates. Maximal degree in co-relation 3379. Up to 88 conditions per place. [2024-02-05 10:36:49,828 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 97 selfloop transitions, 31 changer transitions 22/155 dead transitions. [2024-02-05 10:36:49,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 155 transitions, 2547 flow [2024-02-05 10:36:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-05 10:36:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-05 10:36:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 312 transitions. [2024-02-05 10:36:49,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2024-02-05 10:36:49,829 INFO L175 Difference]: Start difference. First operand has 253 places, 56 transitions, 1007 flow. Second operand 16 states and 312 transitions. [2024-02-05 10:36:49,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 155 transitions, 2547 flow [2024-02-05 10:36:49,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 155 transitions, 1301 flow, removed 210 selfloop flow, removed 78 redundant places. [2024-02-05 10:36:49,849 INFO L231 Difference]: Finished difference. Result has 117 places, 70 transitions, 689 flow [2024-02-05 10:36:49,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=689, PETRI_PLACES=117, PETRI_TRANSITIONS=70} [2024-02-05 10:36:49,850 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 80 predicate places. [2024-02-05 10:36:49,850 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 70 transitions, 689 flow [2024-02-05 10:36:49,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.3125) internal successors, (261), 16 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:49,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:49,851 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:49,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:50,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-05 10:36:50,062 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:50,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1995916438, now seen corresponding path program 17 times [2024-02-05 10:36:50,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:50,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721196841] [2024-02-05 10:36:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:50,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:50,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:50,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721196841] [2024-02-05 10:36:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721196841] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:50,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416913434] [2024-02-05 10:36:50,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:36:50,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:50,221 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:50,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-05 10:36:50,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-02-05 10:36:50,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:50,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:50,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-05 10:36:50,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-02-05 10:36:50,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416913434] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:50,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:50,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2024-02-05 10:36:50,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952571345] [2024-02-05 10:36:50,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:50,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-05 10:36:50,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:50,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-05 10:36:50,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-02-05 10:36:50,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:50,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 70 transitions, 689 flow. Second operand has 20 states, 20 states have (on average 17.8) internal successors, (356), 20 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:50,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:50,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:50,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:50,869 INFO L124 PetriNetUnfolderBase]: 205/537 cut-off events. [2024-02-05 10:36:50,869 INFO L125 PetriNetUnfolderBase]: For 2066/2066 co-relation queries the response was YES. [2024-02-05 10:36:50,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2232 conditions, 537 events. 205/537 cut-off events. For 2066/2066 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2489 event pairs, 0 based on Foata normal form. 13/549 useless extension candidates. Maximal degree in co-relation 2195. Up to 118 conditions per place. [2024-02-05 10:36:50,873 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 58 selfloop transitions, 49 changer transitions 22/134 dead transitions. [2024-02-05 10:36:50,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 134 transitions, 1276 flow [2024-02-05 10:36:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-02-05 10:36:50,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-02-05 10:36:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 413 transitions. [2024-02-05 10:36:50,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5315315315315315 [2024-02-05 10:36:50,876 INFO L175 Difference]: Start difference. First operand has 117 places, 70 transitions, 689 flow. Second operand 21 states and 413 transitions. [2024-02-05 10:36:50,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 134 transitions, 1276 flow [2024-02-05 10:36:50,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 134 transitions, 1199 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-02-05 10:36:50,881 INFO L231 Difference]: Finished difference. Result has 134 places, 76 transitions, 818 flow [2024-02-05 10:36:50,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=818, PETRI_PLACES=134, PETRI_TRANSITIONS=76} [2024-02-05 10:36:50,882 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 97 predicate places. [2024-02-05 10:36:50,882 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 76 transitions, 818 flow [2024-02-05 10:36:50,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.8) internal successors, (356), 20 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:50,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:50,883 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:50,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:51,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-02-05 10:36:51,095 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:51,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash -388558618, now seen corresponding path program 18 times [2024-02-05 10:36:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:51,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627693140] [2024-02-05 10:36:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:51,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:51,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:51,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627693140] [2024-02-05 10:36:51,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627693140] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:51,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138109998] [2024-02-05 10:36:51,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:36:51,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:51,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:51,222 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:51,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-05 10:36:51,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-05 10:36:51,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:51,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:51,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-02-05 10:36:51,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-02-05 10:36:51,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138109998] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:51,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:51,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2024-02-05 10:36:51,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659489309] [2024-02-05 10:36:51,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:51,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-05 10:36:51,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-05 10:36:51,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2024-02-05 10:36:51,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:51,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 76 transitions, 818 flow. Second operand has 20 states, 20 states have (on average 17.7) internal successors, (354), 20 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:51,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:51,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:51,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:51,957 INFO L124 PetriNetUnfolderBase]: 207/571 cut-off events. [2024-02-05 10:36:51,957 INFO L125 PetriNetUnfolderBase]: For 2693/2693 co-relation queries the response was YES. [2024-02-05 10:36:51,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2455 conditions, 571 events. 207/571 cut-off events. For 2693/2693 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2619 event pairs, 10 based on Foata normal form. 18/588 useless extension candidates. Maximal degree in co-relation 2416. Up to 108 conditions per place. [2024-02-05 10:36:51,960 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 50 selfloop transitions, 59 changer transitions 65/179 dead transitions. [2024-02-05 10:36:51,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 179 transitions, 1740 flow [2024-02-05 10:36:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-05 10:36:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-05 10:36:51,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 573 transitions. [2024-02-05 10:36:51,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340167753960857 [2024-02-05 10:36:51,962 INFO L175 Difference]: Start difference. First operand has 134 places, 76 transitions, 818 flow. Second operand 29 states and 573 transitions. [2024-02-05 10:36:51,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 179 transitions, 1740 flow [2024-02-05 10:36:51,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 179 transitions, 1655 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-02-05 10:36:51,969 INFO L231 Difference]: Finished difference. Result has 161 places, 78 transitions, 914 flow [2024-02-05 10:36:51,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=914, PETRI_PLACES=161, PETRI_TRANSITIONS=78} [2024-02-05 10:36:51,969 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2024-02-05 10:36:51,969 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 78 transitions, 914 flow [2024-02-05 10:36:51,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.7) internal successors, (354), 20 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:51,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:51,970 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:51,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:52,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-02-05 10:36:52,186 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:52,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash 889118932, now seen corresponding path program 19 times [2024-02-05 10:36:52,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:52,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879785065] [2024-02-05 10:36:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:52,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:52,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:52,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879785065] [2024-02-05 10:36:52,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879785065] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:52,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265211236] [2024-02-05 10:36:52,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:36:52,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:52,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:52,286 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:52,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-05 10:36:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:52,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2024-02-05 10:36:52,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:52,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:52,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265211236] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:52,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:52,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2024-02-05 10:36:52,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762644743] [2024-02-05 10:36:52,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:52,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-02-05 10:36:52,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:52,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-02-05 10:36:52,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2024-02-05 10:36:52,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:36:52,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 78 transitions, 914 flow. Second operand has 21 states, 21 states have (on average 16.047619047619047) internal successors, (337), 21 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:52,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:52,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:36:52,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:52,969 INFO L124 PetriNetUnfolderBase]: 180/524 cut-off events. [2024-02-05 10:36:52,970 INFO L125 PetriNetUnfolderBase]: For 3315/3315 co-relation queries the response was YES. [2024-02-05 10:36:52,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2660 conditions, 524 events. 180/524 cut-off events. For 3315/3315 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2349 event pairs, 6 based on Foata normal form. 6/529 useless extension candidates. Maximal degree in co-relation 2614. Up to 133 conditions per place. [2024-02-05 10:36:52,973 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 75 selfloop transitions, 25 changer transitions 68/173 dead transitions. [2024-02-05 10:36:52,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 173 transitions, 2112 flow [2024-02-05 10:36:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-05 10:36:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-05 10:36:52,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 349 transitions. [2024-02-05 10:36:52,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49644381223328593 [2024-02-05 10:36:52,974 INFO L175 Difference]: Start difference. First operand has 161 places, 78 transitions, 914 flow. Second operand 19 states and 349 transitions. [2024-02-05 10:36:52,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 173 transitions, 2112 flow [2024-02-05 10:36:52,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 173 transitions, 1868 flow, removed 41 selfloop flow, removed 26 redundant places. [2024-02-05 10:36:52,984 INFO L231 Difference]: Finished difference. Result has 143 places, 77 transitions, 848 flow [2024-02-05 10:36:52,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=848, PETRI_PLACES=143, PETRI_TRANSITIONS=77} [2024-02-05 10:36:52,985 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 106 predicate places. [2024-02-05 10:36:52,985 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 77 transitions, 848 flow [2024-02-05 10:36:52,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 16.047619047619047) internal successors, (337), 21 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:52,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:52,985 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:53,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:53,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:53,197 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:53,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:53,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1610801250, now seen corresponding path program 20 times [2024-02-05 10:36:53,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:53,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36430367] [2024-02-05 10:36:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:53,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:53,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:53,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36430367] [2024-02-05 10:36:53,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36430367] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:53,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894469948] [2024-02-05 10:36:53,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:36:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:53,408 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:53,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-05 10:36:53,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:36:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:53,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2024-02-05 10:36:53,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:53,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:53,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894469948] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:53,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:53,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2024-02-05 10:36:53,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882004023] [2024-02-05 10:36:53,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:53,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-02-05 10:36:53,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:53,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-02-05 10:36:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2024-02-05 10:36:53,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-02-05 10:36:53,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 77 transitions, 848 flow. Second operand has 26 states, 26 states have (on average 17.153846153846153) internal successors, (446), 26 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:53,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:53,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-02-05 10:36:53,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:54,350 INFO L124 PetriNetUnfolderBase]: 236/696 cut-off events. [2024-02-05 10:36:54,350 INFO L125 PetriNetUnfolderBase]: For 3296/3296 co-relation queries the response was YES. [2024-02-05 10:36:54,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 696 events. 236/696 cut-off events. For 3296/3296 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3430 event pairs, 22 based on Foata normal form. 1/694 useless extension candidates. Maximal degree in co-relation 3273. Up to 137 conditions per place. [2024-02-05 10:36:54,355 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 113 selfloop transitions, 75 changer transitions 26/219 dead transitions. [2024-02-05 10:36:54,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 219 transitions, 2520 flow [2024-02-05 10:36:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-05 10:36:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-05 10:36:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 584 transitions. [2024-02-05 10:36:54,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261261261261261 [2024-02-05 10:36:54,359 INFO L175 Difference]: Start difference. First operand has 143 places, 77 transitions, 848 flow. Second operand 30 states and 584 transitions. [2024-02-05 10:36:54,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 219 transitions, 2520 flow [2024-02-05 10:36:54,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 219 transitions, 2373 flow, removed 47 selfloop flow, removed 15 redundant places. [2024-02-05 10:36:54,369 INFO L231 Difference]: Finished difference. Result has 155 places, 118 transitions, 1548 flow [2024-02-05 10:36:54,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1548, PETRI_PLACES=155, PETRI_TRANSITIONS=118} [2024-02-05 10:36:54,370 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 118 predicate places. [2024-02-05 10:36:54,370 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 118 transitions, 1548 flow [2024-02-05 10:36:54,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.153846153846153) internal successors, (446), 26 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:54,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:54,371 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:36:54,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:54,583 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,SelfDestructingSolverStorable28 [2024-02-05 10:36:54,583 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (and 14 more)] === [2024-02-05 10:36:54,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:54,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1776459652, now seen corresponding path program 21 times [2024-02-05 10:36:54,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:54,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532208388] [2024-02-05 10:36:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:54,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-02-05 10:36:54,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:54,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532208388] [2024-02-05 10:36:54,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532208388] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:54,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867827843] [2024-02-05 10:36:54,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:36:54,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:54,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:54,718 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:54,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-05 10:36:54,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-05 10:36:54,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:54,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-05 10:36:54,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-02-05 10:36:54,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-05 10:36:54,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867827843] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:36:54,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-05 10:36:54,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2024-02-05 10:36:54,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787639951] [2024-02-05 10:36:54,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:36:54,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-05 10:36:54,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-05 10:36:54,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-02-05 10:36:54,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:36:54,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 118 transitions, 1548 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:54,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:54,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:36:54,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:54,979 INFO L124 PetriNetUnfolderBase]: 233/687 cut-off events. [2024-02-05 10:36:54,979 INFO L125 PetriNetUnfolderBase]: For 3021/3021 co-relation queries the response was YES. [2024-02-05 10:36:54,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3278 conditions, 687 events. 233/687 cut-off events. For 3021/3021 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3389 event pairs, 0 based on Foata normal form. 2/688 useless extension candidates. Maximal degree in co-relation 3238. Up to 188 conditions per place. [2024-02-05 10:36:54,982 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 0 selfloop transitions, 0 changer transitions 136/136 dead transitions. [2024-02-05 10:36:54,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 136 transitions, 1880 flow [2024-02-05 10:36:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-05 10:36:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-05 10:36:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-02-05 10:36:54,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216216216216216 [2024-02-05 10:36:54,984 INFO L175 Difference]: Start difference. First operand has 155 places, 118 transitions, 1548 flow. Second operand 10 states and 193 transitions. [2024-02-05 10:36:54,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 136 transitions, 1880 flow [2024-02-05 10:36:54,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 136 transitions, 1736 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-02-05 10:36:54,994 INFO L231 Difference]: Finished difference. Result has 144 places, 0 transitions, 0 flow [2024-02-05 10:36:54,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=144, PETRI_TRANSITIONS=0} [2024-02-05 10:36:54,995 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 107 predicate places. [2024-02-05 10:36:54,995 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 0 transitions, 0 flow [2024-02-05 10:36:54,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:54,997 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (16 of 17 remaining) [2024-02-05 10:36:54,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 17 remaining) [2024-02-05 10:36:54,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 17 remaining) [2024-02-05 10:36:54,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 17 remaining) [2024-02-05 10:36:54,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 17 remaining) [2024-02-05 10:36:54,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 17 remaining) [2024-02-05 10:36:54,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 17 remaining) [2024-02-05 10:36:54,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 17 remaining) [2024-02-05 10:36:54,998 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (8 of 17 remaining) [2024-02-05 10:36:54,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 17 remaining) [2024-02-05 10:36:54,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 17 remaining) [2024-02-05 10:36:54,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 17 remaining) [2024-02-05 10:36:54,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 17 remaining) [2024-02-05 10:36:54,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 17 remaining) [2024-02-05 10:36:54,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 17 remaining) [2024-02-05 10:36:54,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 17 remaining) [2024-02-05 10:36:54,999 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 17 remaining) [2024-02-05 10:36:55,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:55,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:55,212 INFO L445 BasicCegarLoop]: Path program histogram: [21, 2, 2, 1, 1, 1, 1, 1] [2024-02-05 10:36:55,217 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-05 10:36:55,217 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-05 10:36:55,220 INFO L503 ceAbstractionStarter]: Automizer considered 8 witness invariants [2024-02-05 10:36:55,220 INFO L504 ceAbstractionStarter]: WitnessConsidered=8 [2024-02-05 10:36:55,222 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.02 10:36:55 BasicIcfg [2024-02-05 10:36:55,222 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-05 10:36:55,223 INFO L158 Benchmark]: Toolchain (without parser) took 26727.55ms. Allocated memory was 224.4MB in the beginning and 815.8MB in the end (delta: 591.4MB). Free memory was 194.4MB in the beginning and 383.1MB in the end (delta: -188.7MB). Peak memory consumption was 401.8MB. Max. memory is 16.1GB. [2024-02-05 10:36:55,223 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 140.5MB. Free memory was 104.7MB in the beginning and 104.5MB in the end (delta: 140.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-05 10:36:55,223 INFO L158 Benchmark]: Witness Parser took 0.39ms. Allocated memory is still 140.5MB. Free memory is still 69.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-05 10:36:55,224 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.29ms. Allocated memory is still 224.4MB. Free memory was 194.2MB in the beginning and 185.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2024-02-05 10:36:55,224 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.93ms. Allocated memory is still 224.4MB. Free memory was 185.7MB in the beginning and 183.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-05 10:36:55,224 INFO L158 Benchmark]: Boogie Preprocessor took 49.05ms. Allocated memory is still 224.4MB. Free memory was 183.6MB in the beginning and 181.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-05 10:36:55,225 INFO L158 Benchmark]: RCFGBuilder took 499.73ms. Allocated memory is still 224.4MB. Free memory was 181.5MB in the beginning and 158.5MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-02-05 10:36:55,225 INFO L158 Benchmark]: TraceAbstraction took 25900.14ms. Allocated memory was 224.4MB in the beginning and 815.8MB in the end (delta: 591.4MB). Free memory was 157.4MB in the beginning and 383.1MB in the end (delta: -225.7MB). Peak memory consumption was 365.6MB. Max. memory is 16.1GB. [2024-02-05 10:36:55,226 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 140.5MB. Free memory was 104.7MB in the beginning and 104.5MB in the end (delta: 140.0kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.39ms. Allocated memory is still 140.5MB. Free memory is still 69.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 247.29ms. Allocated memory is still 224.4MB. Free memory was 194.2MB in the beginning and 185.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.93ms. Allocated memory is still 224.4MB. Free memory was 185.7MB in the beginning and 183.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.05ms. Allocated memory is still 224.4MB. Free memory was 183.6MB in the beginning and 181.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 499.73ms. Allocated memory is still 224.4MB. Free memory was 181.5MB in the beginning and 158.5MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 25900.14ms. Allocated memory was 224.4MB in the beginning and 815.8MB in the end (delta: 591.4MB). Free memory was 157.4MB in the beginning and 383.1MB in the end (delta: -225.7MB). Peak memory consumption was 365.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 45]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 42]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 49]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 53]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 50]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 59]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 17 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 25.8s, OverallIterations: 30, TraceHistogramMax: 6, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 13.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2613 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2457 mSDsluCounter, 81 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 43 mSDsCounter, 522 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8354 IncrementalHoareTripleChecker+Invalid, 8876 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 522 mSolverCounterUnsat, 38 mSDtfsCounter, 8354 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1601 GetRequests, 1130 SyntacticMatches, 11 SemanticMatches, 460 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18259occurred in iteration=23, InterpolantAutomatonStates: 403, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 1535 NumberOfCodeBlocks, 1500 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1992 ConstructedInterpolants, 0 QuantifiedInterpolants, 8860 SizeOfPredicates, 15 NumberOfNonLiveVariables, 3376 ConjunctsInSsa, 154 ConjunctsInUnsatCore, 67 InterpolantComputations, 14 PerfectInterpolantSequences, 570/1144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-05 10:36:55,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE