./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-flipped-dist.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/mult-flipped-dist.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/mult-flipped-dist.wvr.c ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/mult-flipped-dist.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 10:33:03,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:33:03,123 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:33:03,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:33:03,126 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:33:03,138 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:33:03,140 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:33:03,141 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:33:03,142 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:33:03,143 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:33:03,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:33:03,144 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:33:03,144 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:33:03,147 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:33:03,147 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:33:03,147 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:33:03,148 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:33:03,148 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:33:03,148 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:33:03,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:33:03,148 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:33:03,149 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:33:03,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:33:03,149 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:33:03,149 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:33:03,150 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:33:03,150 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:33:03,150 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:33:03,150 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:33:03,151 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:33:03,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:33:03,152 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:33:03,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:33:03,152 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:33:03,152 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:33:03,152 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:33:03,153 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:33:03,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:33:03,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:33:03,154 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:33:03,154 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:33:03,154 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:33:03,154 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:33:03,154 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:33:03,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:33:03,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:33:03,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:33:03,382 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:33:03,384 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:33:03,385 INFO L431 ainManager$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/mult-flipped-dist.wvr.yml/witness.yml [2024-02-05 10:33:03,480 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:33:03,481 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:33:03,482 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2024-02-05 10:33:04,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:33:04,651 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:33:04,651 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2024-02-05 10:33:04,657 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ccb4d40/d5833ab7527d47708fdf6d432fd6d26c/FLAGf873e8e8e [2024-02-05 10:33:04,670 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ccb4d40/d5833ab7527d47708fdf6d432fd6d26c [2024-02-05 10:33:04,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:33:04,672 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:33:04,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:33:04,675 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:33:04,679 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:33:04,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:33:03" (1/2) ... [2024-02-05 10:33:04,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633fbdbd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:33:04, skipping insertion in model container [2024-02-05 10:33:04,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:33:03" (1/2) ... [2024-02-05 10:33:04,682 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e5fbd7f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 05.02 10:33:04, skipping insertion in model container [2024-02-05 10:33:04,682 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:33:04" (2/2) ... [2024-02-05 10:33:04,682 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633fbdbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04, skipping insertion in model container [2024-02-05 10:33:04,683 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:33:04" (2/2) ... [2024-02-05 10:33:04,683 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:33:04,712 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:33:04,713 INFO L101 nessWitnessExtractor]: Location invariant before [L69-L69] ((((((((((0LL - (long long )a) + (long long )c >= 0LL) && ((long long )a + (long long )c >= 0LL)) && ((0LL - (long long )a) - (long long )c >= 0LL)) && ((long long )a - (long long )c >= 0LL)) && (x_1 == 0U)) && (x_2 == 0U)) && (x_3 == 0U)) && (a == 0U)) && (b == 0U)) && (c == 0U) [2024-02-05 10:33:04,713 INFO L101 nessWitnessExtractor]: Location invariant before [L70-L70] ((((x_1 == 0U) && (x_2 == 0U)) && (x_3 == 0U)) && (b == 0U)) && (c == 0U) [2024-02-05 10:33:04,728 INFO L101 nessWitnessExtractor]: Location invariant before [L62-L62] (unsigned long )_argptr == 0UL [2024-02-05 10:33:04,728 INFO L101 nessWitnessExtractor]: Location invariant before [L54-L54] (unsigned long )_argptr == 0UL [2024-02-05 10:33:04,728 INFO L101 nessWitnessExtractor]: Loop invariant at [L58-L58] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 3U || i == 2U) || i == 1U) || (0U == i && i == 0U)) || 12U <= i) || i == 11U) || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) [2024-02-05 10:33:04,729 INFO L101 nessWitnessExtractor]: Location invariant before [L46-L46] (unsigned long )_argptr == 0UL [2024-02-05 10:33:04,729 INFO L101 nessWitnessExtractor]: Location invariant before [L71-L71] (((x_1 == 0U) && (x_2 == 0U)) && (x_3 == 0U)) && (c == 0U) [2024-02-05 10:33:04,729 INFO L101 nessWitnessExtractor]: Loop invariant at [L50-L50] ((unsigned long )_argptr == 0UL) && (((((((((((((0U == i && i == 0U) || 12U <= i) || i == 11U) || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) [2024-02-05 10:33:04,729 INFO L101 nessWitnessExtractor]: Location invariant before [L43-L43] ((unsigned long )_argptr == 0UL) && (((((((((((((12U <= i && i <= 4294967294U) || i == 11U) || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) [2024-02-05 10:33:04,729 INFO L101 nessWitnessExtractor]: Location invariant before [L73-L73] ((x_1 == 0U) && (x_2 == 0U)) && (x_3 == 0U) [2024-02-05 10:33:04,729 INFO L101 nessWitnessExtractor]: Loop invariant at [L42-L42] ((unsigned long )_argptr == 0UL) && ((((((((((((12U <= i || i == 11U) || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) || (0U == i && i == 0U)) [2024-02-05 10:33:04,729 INFO L101 nessWitnessExtractor]: Location invariant before [L59-L59] ((unsigned long )_argptr == 0UL) && ((((((((((((i == 2U || i == 1U) || (0U == i && i == 0U)) || (12U <= i && i <= 4294967294U)) || i == 11U) || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) [2024-02-05 10:33:04,730 INFO L101 nessWitnessExtractor]: Location invariant before [L51-L51] ((unsigned long )_argptr == 0UL) && (((((((((((((0U == i && i == 0U) || (12U <= i && i <= 4294967294U)) || i == 11U) || i == 10U) || i == 9U) || i == 8U) || i == 7U) || i == 6U) || i == 5U) || i == 4U) || i == 3U) || i == 2U) || i == 1U) [2024-02-05 10:33:04,743 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:33:04,882 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/mult-flipped-dist.wvr.c[2174,2187] [2024-02-05 10:33:04,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:33:04,890 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 Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-05 10:33:04,962 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/mult-flipped-dist.wvr.c[2174,2187] [2024-02-05 10:33:04,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:33:04,976 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:33:04,977 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04 WrapperNode [2024-02-05 10:33:04,977 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:33:04,977 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:33:04,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:33:04,978 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:33:04,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:04,988 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,007 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2024-02-05 10:33:05,008 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:33:05,009 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:33:05,009 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:33:05,009 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:33:05,017 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,020 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,035 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-02-05 10:33:05,035 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,036 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,042 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,046 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,047 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:33:05,049 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:33:05,049 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:33:05,050 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:33:05,051 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (1/1) ... [2024-02-05 10:33:05,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:33:05,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:05,078 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 10:33:05,100 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 10:33:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:33:05,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-05 10:33:05,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-05 10:33:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-05 10:33:05,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-05 10:33:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-05 10:33:05,117 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-05 10:33:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:33:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:33:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:33:05,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-05 10:33:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:33:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:33:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:33:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:33:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-05 10:33:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:33:05,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:33:05,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:33:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:33:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:33:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-05 10:33:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:33:05,120 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 10:33:05,236 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:33:05,238 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:33:05,501 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:33:05,502 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:33:05,606 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:33:05,606 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-05 10:33:05,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:33:05 BoogieIcfgContainer [2024-02-05 10:33:05,606 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:33:05,608 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:33:05,608 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:33:05,610 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:33:05,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:33:03" (1/4) ... [2024-02-05 10:33:05,611 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a72da8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:33:05, skipping insertion in model container [2024-02-05 10:33:05,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:33:04" (2/4) ... [2024-02-05 10:33:05,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a72da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:33:05, skipping insertion in model container [2024-02-05 10:33:05,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04" (3/4) ... [2024-02-05 10:33:05,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a72da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:33:05, skipping insertion in model container [2024-02-05 10:33:05,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:33:05" (4/4) ... [2024-02-05 10:33:05,613 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2024-02-05 10:33:05,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:33:05,628 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-02-05 10:33:05,628 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:33:05,713 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-05 10:33:05,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 53 transitions, 127 flow [2024-02-05 10:33:05,788 INFO L124 PetriNetUnfolderBase]: 3/50 cut-off events. [2024-02-05 10:33:05,788 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-05 10:33:05,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 3/50 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 93 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-02-05 10:33:05,792 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 53 transitions, 127 flow [2024-02-05 10:33:05,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 49 transitions, 116 flow [2024-02-05 10:33:05,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:33:05,819 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;@56e95526, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:33:05,819 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-02-05 10:33:05,822 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:33:05,822 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:33:05,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:33:05,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:05,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:33:05,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:05,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:05,827 INFO L85 PathProgramCache]: Analyzing trace with hash 9672, now seen corresponding path program 1 times [2024-02-05 10:33:05,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:05,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65343841] [2024-02-05 10:33:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:05,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:06,379 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 10:33:06,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:06,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65343841] [2024-02-05 10:33:06,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65343841] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:06,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:06,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:33:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242778148] [2024-02-05 10:33:06,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:06,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:06,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:06,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:06,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:06,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-02-05 10:33:06,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:06,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:06,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-02-05 10:33:06,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:06,684 INFO L124 PetriNetUnfolderBase]: 846/1401 cut-off events. [2024-02-05 10:33:06,685 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-02-05 10:33:06,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2725 conditions, 1401 events. 846/1401 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6822 event pairs, 652 based on Foata normal form. 0/1185 useless extension candidates. Maximal degree in co-relation 2324. Up to 1226 conditions per place. [2024-02-05 10:33:06,711 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 33 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2024-02-05 10:33:06,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 184 flow [2024-02-05 10:33:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:06,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-02-05 10:33:06,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-02-05 10:33:06,725 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 116 flow. Second operand 3 states and 84 transitions. [2024-02-05 10:33:06,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 184 flow [2024-02-05 10:33:06,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 172 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-05 10:33:06,738 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 106 flow [2024-02-05 10:33:06,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-02-05 10:33:06,743 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -5 predicate places. [2024-02-05 10:33:06,744 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 106 flow [2024-02-05 10:33:06,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:06,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:06,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-05 10:33:06,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:33:06,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:06,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:06,746 INFO L85 PathProgramCache]: Analyzing trace with hash 300163, now seen corresponding path program 1 times [2024-02-05 10:33:06,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:06,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041388418] [2024-02-05 10:33:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:06,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:06,843 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 10:33:06,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:06,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041388418] [2024-02-05 10:33:06,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041388418] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:06,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:06,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:06,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376459595] [2024-02-05 10:33:06,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:06,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:06,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:06,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:06,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:06,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-02-05 10:33:06,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 106 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 10:33:06,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:06,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-02-05 10:33:06,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:07,071 INFO L124 PetriNetUnfolderBase]: 846/1400 cut-off events. [2024-02-05 10:33:07,072 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-05 10:33:07,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2661 conditions, 1400 events. 846/1400 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6796 event pairs, 652 based on Foata normal form. 0/1185 useless extension candidates. Maximal degree in co-relation 2652. Up to 1224 conditions per place. [2024-02-05 10:33:07,085 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 32 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-02-05 10:33:07,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 172 flow [2024-02-05 10:33:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-02-05 10:33:07,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408805031446541 [2024-02-05 10:33:07,088 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 106 flow. Second operand 3 states and 86 transitions. [2024-02-05 10:33:07,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 172 flow [2024-02-05 10:33:07,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 168 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:07,090 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 104 flow [2024-02-05 10:33:07,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-02-05 10:33:07,091 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -6 predicate places. [2024-02-05 10:33:07,091 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 104 flow [2024-02-05 10:33:07,091 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 10:33:07,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:07,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-05 10:33:07,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:33:07,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:07,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:07,092 INFO L85 PathProgramCache]: Analyzing trace with hash 9305343, now seen corresponding path program 1 times [2024-02-05 10:33:07,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:07,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299370188] [2024-02-05 10:33:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:07,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:07,146 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 10:33:07,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:07,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299370188] [2024-02-05 10:33:07,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299370188] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:07,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:07,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:07,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986267164] [2024-02-05 10:33:07,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:07,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:07,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:07,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:07,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:07,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:33:07,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 10:33:07,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:07,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:33:07,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:07,354 INFO L124 PetriNetUnfolderBase]: 846/1399 cut-off events. [2024-02-05 10:33:07,354 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-05 10:33:07,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2659 conditions, 1399 events. 846/1399 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6846 event pairs, 652 based on Foata normal form. 0/1185 useless extension candidates. Maximal degree in co-relation 2648. Up to 1222 conditions per place. [2024-02-05 10:33:07,363 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 31 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-02-05 10:33:07,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 46 transitions, 168 flow [2024-02-05 10:33:07,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:07,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-02-05 10:33:07,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2024-02-05 10:33:07,369 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 104 flow. Second operand 3 states and 88 transitions. [2024-02-05 10:33:07,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 46 transitions, 168 flow [2024-02-05 10:33:07,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:07,370 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 102 flow [2024-02-05 10:33:07,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2024-02-05 10:33:07,371 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2024-02-05 10:33:07,372 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 102 flow [2024-02-05 10:33:07,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 10:33:07,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:07,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-05 10:33:07,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:33:07,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:07,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:07,373 INFO L85 PathProgramCache]: Analyzing trace with hash 288465937, now seen corresponding path program 1 times [2024-02-05 10:33:07,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:07,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461277875] [2024-02-05 10:33:07,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:07,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:07,412 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 10:33:07,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:07,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461277875] [2024-02-05 10:33:07,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461277875] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:07,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:07,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:07,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363715639] [2024-02-05 10:33:07,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:07,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:07,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:07,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:07,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:33:07,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 10:33:07,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:07,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:33:07,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:07,613 INFO L124 PetriNetUnfolderBase]: 918/1589 cut-off events. [2024-02-05 10:33:07,613 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-02-05 10:33:07,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2969 conditions, 1589 events. 918/1589 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8484 event pairs, 333 based on Foata normal form. 1/1563 useless extension candidates. Maximal degree in co-relation 2956. Up to 790 conditions per place. [2024-02-05 10:33:07,626 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 46 selfloop transitions, 4 changer transitions 1/67 dead transitions. [2024-02-05 10:33:07,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 251 flow [2024-02-05 10:33:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-02-05 10:33:07,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7484276729559748 [2024-02-05 10:33:07,628 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 102 flow. Second operand 3 states and 119 transitions. [2024-02-05 10:33:07,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 251 flow [2024-02-05 10:33:07,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:07,630 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 122 flow [2024-02-05 10:33:07,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-02-05 10:33:07,632 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2024-02-05 10:33:07,632 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 122 flow [2024-02-05 10:33:07,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 10:33:07,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:07,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:07,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:33:07,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:07,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash -540470628, now seen corresponding path program 1 times [2024-02-05 10:33:07,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:07,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374227694] [2024-02-05 10:33:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:07,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:07,852 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 10:33:07,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:07,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374227694] [2024-02-05 10:33:07,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374227694] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:07,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:07,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:07,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833406711] [2024-02-05 10:33:07,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:07,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:07,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:07,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:07,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 10:33:07,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:07,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:07,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:08,004 INFO L124 PetriNetUnfolderBase]: 1103/1812 cut-off events. [2024-02-05 10:33:08,005 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2024-02-05 10:33:08,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3914 conditions, 1812 events. 1103/1812 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9756 event pairs, 78 based on Foata normal form. 0/1799 useless extension candidates. Maximal degree in co-relation 1470. Up to 1408 conditions per place. [2024-02-05 10:33:08,014 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 46 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-02-05 10:33:08,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 256 flow [2024-02-05 10:33:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:08,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-02-05 10:33:08,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.589622641509434 [2024-02-05 10:33:08,015 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 122 flow. Second operand 4 states and 125 transitions. [2024-02-05 10:33:08,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 256 flow [2024-02-05 10:33:08,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:08,017 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 118 flow [2024-02-05 10:33:08,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2024-02-05 10:33:08,017 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2024-02-05 10:33:08,017 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 118 flow [2024-02-05 10:33:08,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 10:33:08,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:08,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:08,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:33:08,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:08,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:08,019 INFO L85 PathProgramCache]: Analyzing trace with hash 297974936, now seen corresponding path program 1 times [2024-02-05 10:33:08,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:08,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396838584] [2024-02-05 10:33:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:08,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:08,168 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 10:33:08,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:08,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396838584] [2024-02-05 10:33:08,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396838584] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:08,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:08,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:08,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169389533] [2024-02-05 10:33:08,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:08,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:08,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:08,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:08,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:08,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:08,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:08,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:08,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:08,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:08,372 INFO L124 PetriNetUnfolderBase]: 1133/1887 cut-off events. [2024-02-05 10:33:08,372 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2024-02-05 10:33:08,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3888 conditions, 1887 events. 1133/1887 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10222 event pairs, 42 based on Foata normal form. 0/1870 useless extension candidates. Maximal degree in co-relation 3867. Up to 1394 conditions per place. [2024-02-05 10:33:08,379 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 51 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-02-05 10:33:08,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 274 flow [2024-02-05 10:33:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-02-05 10:33:08,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084905660377359 [2024-02-05 10:33:08,380 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 118 flow. Second operand 4 states and 129 transitions. [2024-02-05 10:33:08,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 274 flow [2024-02-05 10:33:08,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:08,384 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 115 flow [2024-02-05 10:33:08,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2024-02-05 10:33:08,387 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -8 predicate places. [2024-02-05 10:33:08,387 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 115 flow [2024-02-05 10:33:08,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:08,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:08,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:08,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:33:08,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:08,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:08,388 INFO L85 PathProgramCache]: Analyzing trace with hash 298780063, now seen corresponding path program 1 times [2024-02-05 10:33:08,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:08,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212661663] [2024-02-05 10:33:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:08,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:08,548 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 10:33:08,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:08,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212661663] [2024-02-05 10:33:08,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212661663] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:08,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:08,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:08,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105487147] [2024-02-05 10:33:08,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:08,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:08,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:08,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:08,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:08,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:33:08,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 10:33:08,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:08,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:33:08,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:08,764 INFO L124 PetriNetUnfolderBase]: 1422/2109 cut-off events. [2024-02-05 10:33:08,764 INFO L125 PetriNetUnfolderBase]: For 261/261 co-relation queries the response was YES. [2024-02-05 10:33:08,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4657 conditions, 2109 events. 1422/2109 cut-off events. For 261/261 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10106 event pairs, 233 based on Foata normal form. 84/2049 useless extension candidates. Maximal degree in co-relation 3916. Up to 1005 conditions per place. [2024-02-05 10:33:08,775 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 61 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2024-02-05 10:33:08,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 333 flow [2024-02-05 10:33:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-02-05 10:33:08,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-02-05 10:33:08,776 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 115 flow. Second operand 4 states and 132 transitions. [2024-02-05 10:33:08,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 333 flow [2024-02-05 10:33:08,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:08,779 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 137 flow [2024-02-05 10:33:08,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-02-05 10:33:08,780 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -6 predicate places. [2024-02-05 10:33:08,780 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 137 flow [2024-02-05 10:33:08,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 10:33:08,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:08,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:08,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:33:08,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:08,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:08,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1410387106, now seen corresponding path program 1 times [2024-02-05 10:33:08,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:08,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152673220] [2024-02-05 10:33:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:08,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:08,916 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 10:33:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:08,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152673220] [2024-02-05 10:33:08,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152673220] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:08,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:08,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258829212] [2024-02-05 10:33:08,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:08,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:08,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:08,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:08,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 10:33:08,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:08,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:08,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:09,124 INFO L124 PetriNetUnfolderBase]: 1253/1996 cut-off events. [2024-02-05 10:33:09,125 INFO L125 PetriNetUnfolderBase]: For 1991/2219 co-relation queries the response was YES. [2024-02-05 10:33:09,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 1996 events. 1253/1996 cut-off events. For 1991/2219 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10221 event pairs, 87 based on Foata normal form. 48/2031 useless extension candidates. Maximal degree in co-relation 4798. Up to 1339 conditions per place. [2024-02-05 10:33:09,134 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 59 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-02-05 10:33:09,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 361 flow [2024-02-05 10:33:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-02-05 10:33:09,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-02-05 10:33:09,136 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 137 flow. Second operand 4 states and 133 transitions. [2024-02-05 10:33:09,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 361 flow [2024-02-05 10:33:09,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:09,137 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 136 flow [2024-02-05 10:33:09,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-02-05 10:33:09,138 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -6 predicate places. [2024-02-05 10:33:09,138 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 136 flow [2024-02-05 10:33:09,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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 10:33:09,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:09,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:09,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-05 10:33:09,139 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:09,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:09,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1408884293, now seen corresponding path program 1 times [2024-02-05 10:33:09,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:09,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371898475] [2024-02-05 10:33:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:09,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:09,248 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 10:33:09,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:09,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371898475] [2024-02-05 10:33:09,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371898475] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:09,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:09,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:09,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668070513] [2024-02-05 10:33:09,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:09,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:09,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:09,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:33:09,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:09,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:09,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:33:09,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:09,493 INFO L124 PetriNetUnfolderBase]: 1709/2457 cut-off events. [2024-02-05 10:33:09,493 INFO L125 PetriNetUnfolderBase]: For 2246/2552 co-relation queries the response was YES. [2024-02-05 10:33:09,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6368 conditions, 2457 events. 1709/2457 cut-off events. For 2246/2552 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11400 event pairs, 307 based on Foata normal form. 176/2446 useless extension candidates. Maximal degree in co-relation 6346. Up to 1065 conditions per place. [2024-02-05 10:33:09,504 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 64 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2024-02-05 10:33:09,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 396 flow [2024-02-05 10:33:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-02-05 10:33:09,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-02-05 10:33:09,506 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 136 flow. Second operand 4 states and 132 transitions. [2024-02-05 10:33:09,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 396 flow [2024-02-05 10:33:09,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:09,508 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 158 flow [2024-02-05 10:33:09,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-02-05 10:33:09,509 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -4 predicate places. [2024-02-05 10:33:09,509 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 158 flow [2024-02-05 10:33:09,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:09,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:09,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:09,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-05 10:33:09,509 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:09,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1827668001, now seen corresponding path program 1 times [2024-02-05 10:33:09,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:09,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850104309] [2024-02-05 10:33:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:09,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:09,622 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 10:33:09,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:09,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850104309] [2024-02-05 10:33:09,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850104309] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:09,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:09,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742122642] [2024-02-05 10:33:09,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:09,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:09,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:09,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-02-05 10:33:09,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 10:33:09,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:09,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-02-05 10:33:09,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:09,850 INFO L124 PetriNetUnfolderBase]: 1901/2671 cut-off events. [2024-02-05 10:33:09,851 INFO L125 PetriNetUnfolderBase]: For 4385/5056 co-relation queries the response was YES. [2024-02-05 10:33:09,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7864 conditions, 2671 events. 1901/2671 cut-off events. For 4385/5056 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11901 event pairs, 417 based on Foata normal form. 257/2757 useless extension candidates. Maximal degree in co-relation 7840. Up to 1066 conditions per place. [2024-02-05 10:33:09,864 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 67 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-02-05 10:33:09,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 79 transitions, 458 flow [2024-02-05 10:33:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:09,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-02-05 10:33:09,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-02-05 10:33:09,866 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 158 flow. Second operand 4 states and 132 transitions. [2024-02-05 10:33:09,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 79 transitions, 458 flow [2024-02-05 10:33:09,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 455 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:09,869 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 182 flow [2024-02-05 10:33:09,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-02-05 10:33:09,870 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-02-05 10:33:09,870 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 182 flow [2024-02-05 10:33:09,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 10:33:09,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:09,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:09,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-05 10:33:09,871 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:09,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:09,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1488871410, now seen corresponding path program 1 times [2024-02-05 10:33:09,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:09,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106841755] [2024-02-05 10:33:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:09,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:09,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:09,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106841755] [2024-02-05 10:33:09,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106841755] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:09,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:09,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:09,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405569250] [2024-02-05 10:33:09,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:09,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:09,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:09,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:09,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:09,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:09,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:09,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:09,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:10,296 INFO L124 PetriNetUnfolderBase]: 2845/3970 cut-off events. [2024-02-05 10:33:10,296 INFO L125 PetriNetUnfolderBase]: For 5085/5085 co-relation queries the response was YES. [2024-02-05 10:33:10,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12759 conditions, 3970 events. 2845/3970 cut-off events. For 5085/5085 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18030 event pairs, 1308 based on Foata normal form. 92/4050 useless extension candidates. Maximal degree in co-relation 12733. Up to 2681 conditions per place. [2024-02-05 10:33:10,319 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 76 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2024-02-05 10:33:10,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 558 flow [2024-02-05 10:33:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-02-05 10:33:10,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6933962264150944 [2024-02-05 10:33:10,320 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 182 flow. Second operand 4 states and 147 transitions. [2024-02-05 10:33:10,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 558 flow [2024-02-05 10:33:10,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 555 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:10,359 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 257 flow [2024-02-05 10:33:10,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-02-05 10:33:10,360 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-02-05 10:33:10,360 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 257 flow [2024-02-05 10:33:10,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:10,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:10,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:10,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-05 10:33:10,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:10,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1694890702, now seen corresponding path program 2 times [2024-02-05 10:33:10,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:10,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353370841] [2024-02-05 10:33:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:10,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:10,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:10,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353370841] [2024-02-05 10:33:10,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353370841] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:10,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:10,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:10,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468016337] [2024-02-05 10:33:10,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:10,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:10,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:10,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:10,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:10,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:10,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:10,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:10,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:10,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:10,824 INFO L124 PetriNetUnfolderBase]: 3121/4466 cut-off events. [2024-02-05 10:33:10,824 INFO L125 PetriNetUnfolderBase]: For 7660/7660 co-relation queries the response was YES. [2024-02-05 10:33:10,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15835 conditions, 4466 events. 3121/4466 cut-off events. For 7660/7660 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22091 event pairs, 976 based on Foata normal form. 194/4653 useless extension candidates. Maximal degree in co-relation 15807. Up to 2017 conditions per place. [2024-02-05 10:33:10,845 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 84 selfloop transitions, 6 changer transitions 2/96 dead transitions. [2024-02-05 10:33:10,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 96 transitions, 640 flow [2024-02-05 10:33:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-02-05 10:33:10,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7169811320754716 [2024-02-05 10:33:10,846 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 257 flow. Second operand 4 states and 152 transitions. [2024-02-05 10:33:10,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 96 transitions, 640 flow [2024-02-05 10:33:10,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 96 transitions, 628 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:10,872 INFO L231 Difference]: Finished difference. Result has 61 places, 51 transitions, 268 flow [2024-02-05 10:33:10,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=61, PETRI_TRANSITIONS=51} [2024-02-05 10:33:10,873 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-02-05 10:33:10,873 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 51 transitions, 268 flow [2024-02-05 10:33:10,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:10,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:10,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:10,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-05 10:33:10,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:10,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:10,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2077479826, now seen corresponding path program 1 times [2024-02-05 10:33:10,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:10,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423479110] [2024-02-05 10:33:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:10,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:10,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:10,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423479110] [2024-02-05 10:33:10,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423479110] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:10,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:10,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:10,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847000334] [2024-02-05 10:33:10,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:10,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:10,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:10,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:10,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:10,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 51 transitions, 268 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:10,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:10,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:10,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:11,373 INFO L124 PetriNetUnfolderBase]: 3807/5450 cut-off events. [2024-02-05 10:33:11,373 INFO L125 PetriNetUnfolderBase]: For 11213/11213 co-relation queries the response was YES. [2024-02-05 10:33:11,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19961 conditions, 5450 events. 3807/5450 cut-off events. For 11213/11213 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 27288 event pairs, 809 based on Foata normal form. 148/5587 useless extension candidates. Maximal degree in co-relation 19929. Up to 3910 conditions per place. [2024-02-05 10:33:11,402 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 84 selfloop transitions, 8 changer transitions 7/103 dead transitions. [2024-02-05 10:33:11,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 103 transitions, 747 flow [2024-02-05 10:33:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-02-05 10:33:11,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7169811320754716 [2024-02-05 10:33:11,404 INFO L175 Difference]: Start difference. First operand has 61 places, 51 transitions, 268 flow. Second operand 4 states and 152 transitions. [2024-02-05 10:33:11,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 103 transitions, 747 flow [2024-02-05 10:33:11,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 103 transitions, 723 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-05 10:33:11,430 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 364 flow [2024-02-05 10:33:11,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-02-05 10:33:11,430 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-02-05 10:33:11,430 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 364 flow [2024-02-05 10:33:11,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:11,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:11,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:11,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-05 10:33:11,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:11,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:11,432 INFO L85 PathProgramCache]: Analyzing trace with hash -135274802, now seen corresponding path program 2 times [2024-02-05 10:33:11,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:11,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535504281] [2024-02-05 10:33:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:11,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:11,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:11,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535504281] [2024-02-05 10:33:11,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535504281] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:11,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:11,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:33:11,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704153643] [2024-02-05 10:33:11,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:11,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:33:11,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:11,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:33:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:33:11,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:11,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 364 flow. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:11,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:11,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:11,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:12,033 INFO L124 PetriNetUnfolderBase]: 4303/6157 cut-off events. [2024-02-05 10:33:12,033 INFO L125 PetriNetUnfolderBase]: For 17499/17499 co-relation queries the response was YES. [2024-02-05 10:33:12,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24299 conditions, 6157 events. 4303/6157 cut-off events. For 17499/17499 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31599 event pairs, 1746 based on Foata normal form. 56/6199 useless extension candidates. Maximal degree in co-relation 24267. Up to 4043 conditions per place. [2024-02-05 10:33:12,065 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 102 selfloop transitions, 15 changer transitions 2/123 dead transitions. [2024-02-05 10:33:12,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 123 transitions, 1040 flow [2024-02-05 10:33:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:33:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:33:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2024-02-05 10:33:12,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6641509433962264 [2024-02-05 10:33:12,067 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 364 flow. Second operand 5 states and 176 transitions. [2024-02-05 10:33:12,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 123 transitions, 1040 flow [2024-02-05 10:33:12,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 123 transitions, 1040 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-05 10:33:12,107 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 542 flow [2024-02-05 10:33:12,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-02-05 10:33:12,107 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-02-05 10:33:12,108 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 542 flow [2024-02-05 10:33:12,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:12,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:12,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:12,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-05 10:33:12,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:12,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:12,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1579388096, now seen corresponding path program 3 times [2024-02-05 10:33:12,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:12,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197783391] [2024-02-05 10:33:12,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:12,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:12,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:12,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197783391] [2024-02-05 10:33:12,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197783391] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:12,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:12,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:12,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554724961] [2024-02-05 10:33:12,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:12,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:12,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:12,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:12,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 542 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:12,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:12,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:12,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:12,799 INFO L124 PetriNetUnfolderBase]: 4580/6627 cut-off events. [2024-02-05 10:33:12,799 INFO L125 PetriNetUnfolderBase]: For 28235/28235 co-relation queries the response was YES. [2024-02-05 10:33:12,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28679 conditions, 6627 events. 4580/6627 cut-off events. For 28235/28235 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 34635 event pairs, 1599 based on Foata normal form. 178/6786 useless extension candidates. Maximal degree in co-relation 28643. Up to 3700 conditions per place. [2024-02-05 10:33:12,848 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 91 selfloop transitions, 26 changer transitions 2/123 dead transitions. [2024-02-05 10:33:12,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 123 transitions, 1150 flow [2024-02-05 10:33:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:12,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-02-05 10:33:12,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6933962264150944 [2024-02-05 10:33:12,850 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 542 flow. Second operand 4 states and 147 transitions. [2024-02-05 10:33:12,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 123 transitions, 1150 flow [2024-02-05 10:33:12,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 123 transitions, 1118 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:12,894 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 728 flow [2024-02-05 10:33:12,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=728, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-02-05 10:33:12,895 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-02-05 10:33:12,895 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 728 flow [2024-02-05 10:33:12,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:12,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:12,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:12,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-05 10:33:12,896 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:12,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:12,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1185576716, now seen corresponding path program 1 times [2024-02-05 10:33:12,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:12,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243474874] [2024-02-05 10:33:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:12,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:13,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243474874] [2024-02-05 10:33:13,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243474874] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:13,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:13,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-05 10:33:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712420183] [2024-02-05 10:33:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:13,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:33:13,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:33:13,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-05 10:33:13,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:13,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 728 flow. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:13,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:13,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:13,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:13,601 INFO L124 PetriNetUnfolderBase]: 4470/6465 cut-off events. [2024-02-05 10:33:13,601 INFO L125 PetriNetUnfolderBase]: For 32613/32613 co-relation queries the response was YES. [2024-02-05 10:33:13,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29813 conditions, 6465 events. 4470/6465 cut-off events. For 32613/32613 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 33478 event pairs, 1495 based on Foata normal form. 40/6491 useless extension candidates. Maximal degree in co-relation 29775. Up to 3186 conditions per place. [2024-02-05 10:33:13,703 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 85 selfloop transitions, 14 changer transitions 26/129 dead transitions. [2024-02-05 10:33:13,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 129 transitions, 1239 flow [2024-02-05 10:33:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:33:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:33:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2024-02-05 10:33:13,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6754716981132075 [2024-02-05 10:33:13,704 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 728 flow. Second operand 5 states and 179 transitions. [2024-02-05 10:33:13,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 129 transitions, 1239 flow [2024-02-05 10:33:13,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 129 transitions, 1194 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-02-05 10:33:13,756 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 718 flow [2024-02-05 10:33:13,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-02-05 10:33:13,757 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-02-05 10:33:13,757 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 718 flow [2024-02-05 10:33:13,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:13,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:13,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:13,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-05 10:33:13,758 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:13,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:13,758 INFO L85 PathProgramCache]: Analyzing trace with hash -196283422, now seen corresponding path program 3 times [2024-02-05 10:33:13,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:13,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860769172] [2024-02-05 10:33:13,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:13,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:13,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:13,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860769172] [2024-02-05 10:33:13,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860769172] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:13,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:13,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:13,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816608512] [2024-02-05 10:33:13,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:13,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:13,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:13,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:13,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:13,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 718 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:13,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:13,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:13,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:14,363 INFO L124 PetriNetUnfolderBase]: 4178/5901 cut-off events. [2024-02-05 10:33:14,364 INFO L125 PetriNetUnfolderBase]: For 31116/31119 co-relation queries the response was YES. [2024-02-05 10:33:14,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28802 conditions, 5901 events. 4178/5901 cut-off events. For 31116/31119 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 28833 event pairs, 813 based on Foata normal form. 124/6015 useless extension candidates. Maximal degree in co-relation 28760. Up to 4218 conditions per place. [2024-02-05 10:33:14,398 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 100 selfloop transitions, 13 changer transitions 4/121 dead transitions. [2024-02-05 10:33:14,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 121 transitions, 1306 flow [2024-02-05 10:33:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-02-05 10:33:14,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6839622641509434 [2024-02-05 10:33:14,400 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 718 flow. Second operand 4 states and 145 transitions. [2024-02-05 10:33:14,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 121 transitions, 1306 flow [2024-02-05 10:33:14,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 121 transitions, 1262 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-02-05 10:33:14,463 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 783 flow [2024-02-05 10:33:14,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=783, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2024-02-05 10:33:14,464 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-02-05 10:33:14,464 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 783 flow [2024-02-05 10:33:14,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:14,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:14,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:14,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-05 10:33:14,465 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:14,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2118982919, now seen corresponding path program 1 times [2024-02-05 10:33:14,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:14,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035297705] [2024-02-05 10:33:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:14,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:14,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035297705] [2024-02-05 10:33:14,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035297705] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:14,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:14,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717414549] [2024-02-05 10:33:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:14,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:14,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:14,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:14,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 783 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:14,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:14,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:14,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:15,161 INFO L124 PetriNetUnfolderBase]: 4782/6898 cut-off events. [2024-02-05 10:33:15,161 INFO L125 PetriNetUnfolderBase]: For 41805/41805 co-relation queries the response was YES. [2024-02-05 10:33:15,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33034 conditions, 6898 events. 4782/6898 cut-off events. For 41805/41805 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 35496 event pairs, 1712 based on Foata normal form. 240/7128 useless extension candidates. Maximal degree in co-relation 32992. Up to 4499 conditions per place. [2024-02-05 10:33:15,204 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 140 selfloop transitions, 6 changer transitions 6/156 dead transitions. [2024-02-05 10:33:15,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 156 transitions, 1798 flow [2024-02-05 10:33:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2024-02-05 10:33:15,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6981132075471698 [2024-02-05 10:33:15,205 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 783 flow. Second operand 4 states and 148 transitions. [2024-02-05 10:33:15,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 156 transitions, 1798 flow [2024-02-05 10:33:15,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 156 transitions, 1772 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:15,247 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 818 flow [2024-02-05 10:33:15,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=818, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-02-05 10:33:15,248 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-02-05 10:33:15,248 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 818 flow [2024-02-05 10:33:15,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:15,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:15,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:15,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-05 10:33:15,249 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:15,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:15,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2010405633, now seen corresponding path program 2 times [2024-02-05 10:33:15,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:15,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735256607] [2024-02-05 10:33:15,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:15,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:15,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:15,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735256607] [2024-02-05 10:33:15,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735256607] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:15,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:15,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:15,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130063456] [2024-02-05 10:33:15,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:15,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:15,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:15,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:15,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:15,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:15,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 818 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:15,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:15,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:15,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:16,115 INFO L124 PetriNetUnfolderBase]: 5636/8103 cut-off events. [2024-02-05 10:33:16,118 INFO L125 PetriNetUnfolderBase]: For 54356/54359 co-relation queries the response was YES. [2024-02-05 10:33:16,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42031 conditions, 8103 events. 5636/8103 cut-off events. For 54356/54359 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 42335 event pairs, 1729 based on Foata normal form. 174/8269 useless extension candidates. Maximal degree in co-relation 41984. Up to 6779 conditions per place. [2024-02-05 10:33:16,195 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 111 selfloop transitions, 11 changer transitions 2/128 dead transitions. [2024-02-05 10:33:16,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 128 transitions, 1470 flow [2024-02-05 10:33:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-02-05 10:33:16,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6745283018867925 [2024-02-05 10:33:16,197 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 818 flow. Second operand 4 states and 143 transitions. [2024-02-05 10:33:16,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 128 transitions, 1470 flow [2024-02-05 10:33:16,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 1445 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-05 10:33:16,259 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 870 flow [2024-02-05 10:33:16,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=870, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-02-05 10:33:16,259 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2024-02-05 10:33:16,259 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 870 flow [2024-02-05 10:33:16,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:16,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:16,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-05 10:33:16,260 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:16,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1246354699, now seen corresponding path program 3 times [2024-02-05 10:33:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:16,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741327498] [2024-02-05 10:33:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:16,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741327498] [2024-02-05 10:33:16,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741327498] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:16,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:16,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-05 10:33:16,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374570923] [2024-02-05 10:33:16,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:16,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:16,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:16,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:16,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:16,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 870 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:16,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:16,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:16,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:17,063 INFO L124 PetriNetUnfolderBase]: 5390/7665 cut-off events. [2024-02-05 10:33:17,063 INFO L125 PetriNetUnfolderBase]: For 56251/56251 co-relation queries the response was YES. [2024-02-05 10:33:17,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40756 conditions, 7665 events. 5390/7665 cut-off events. For 56251/56251 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 38854 event pairs, 2036 based on Foata normal form. 174/7829 useless extension candidates. Maximal degree in co-relation 40709. Up to 4726 conditions per place. [2024-02-05 10:33:17,116 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 134 selfloop transitions, 25 changer transitions 1/164 dead transitions. [2024-02-05 10:33:17,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 164 transitions, 2009 flow [2024-02-05 10:33:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-02-05 10:33:17,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6933962264150944 [2024-02-05 10:33:17,117 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 870 flow. Second operand 4 states and 147 transitions. [2024-02-05 10:33:17,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 164 transitions, 2009 flow [2024-02-05 10:33:17,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 164 transitions, 1995 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:17,171 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 1153 flow [2024-02-05 10:33:17,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1153, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2024-02-05 10:33:17,172 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-02-05 10:33:17,172 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 1153 flow [2024-02-05 10:33:17,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:33:17,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:17,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:17,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-05 10:33:17,173 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:17,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:17,173 INFO L85 PathProgramCache]: Analyzing trace with hash -948462362, now seen corresponding path program 1 times [2024-02-05 10:33:17,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:17,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910017656] [2024-02-05 10:33:17,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:17,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910017656] [2024-02-05 10:33:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910017656] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725699445] [2024-02-05 10:33:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:17,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:17,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:17,380 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 10:33:17,381 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 10:33:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:17,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-05 10:33:17,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:17,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:18,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725699445] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:18,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:18,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2024-02-05 10:33:18,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923081371] [2024-02-05 10:33:18,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:18,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-05 10:33:18,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-05 10:33:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-02-05 10:33:18,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:33:18,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 1153 flow. Second operand has 12 states, 12 states have (on average 29.083333333333332) internal successors, (349), 12 states have internal predecessors, (349), 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 10:33:18,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:18,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:33:18,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:19,103 INFO L124 PetriNetUnfolderBase]: 5613/8730 cut-off events. [2024-02-05 10:33:19,103 INFO L125 PetriNetUnfolderBase]: For 59462/60625 co-relation queries the response was YES. [2024-02-05 10:33:19,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44374 conditions, 8730 events. 5613/8730 cut-off events. For 59462/60625 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 54018 event pairs, 623 based on Foata normal form. 167/8525 useless extension candidates. Maximal degree in co-relation 44326. Up to 5026 conditions per place. [2024-02-05 10:33:19,176 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 117 selfloop transitions, 34 changer transitions 2/199 dead transitions. [2024-02-05 10:33:19,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 199 transitions, 1965 flow [2024-02-05 10:33:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-05 10:33:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-05 10:33:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 371 transitions. [2024-02-05 10:33:19,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-02-05 10:33:19,178 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 1153 flow. Second operand 11 states and 371 transitions. [2024-02-05 10:33:19,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 199 transitions, 1965 flow [2024-02-05 10:33:19,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 199 transitions, 1869 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-02-05 10:33:19,227 INFO L231 Difference]: Finished difference. Result has 97 places, 121 transitions, 1400 flow [2024-02-05 10:33:19,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1400, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2024-02-05 10:33:19,228 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-02-05 10:33:19,228 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1400 flow [2024-02-05 10:33:19,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.083333333333332) internal successors, (349), 12 states have internal predecessors, (349), 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 10:33:19,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:19,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:19,247 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 10:33:19,440 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,SelfDestructingSolverStorable20 [2024-02-05 10:33:19,441 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:19,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:19,441 INFO L85 PathProgramCache]: Analyzing trace with hash 19305980, now seen corresponding path program 2 times [2024-02-05 10:33:19,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:19,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978646879] [2024-02-05 10:33:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:19,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:19,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978646879] [2024-02-05 10:33:19,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978646879] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:19,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270958113] [2024-02-05 10:33:19,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:33:19,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:19,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:19,609 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 10:33:19,627 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 10:33:19,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:33:19,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:19,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-05 10:33:19,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:19,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:20,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270958113] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:20,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:20,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-02-05 10:33:20,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121828039] [2024-02-05 10:33:20,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:20,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-05 10:33:20,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-05 10:33:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-05 10:33:20,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:33:20,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 121 transitions, 1400 flow. Second operand has 13 states, 13 states have (on average 28.692307692307693) internal successors, (373), 13 states have internal predecessors, (373), 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 10:33:20,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:20,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:33:20,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:21,813 INFO L124 PetriNetUnfolderBase]: 7146/11132 cut-off events. [2024-02-05 10:33:21,813 INFO L125 PetriNetUnfolderBase]: For 77359/78629 co-relation queries the response was YES. [2024-02-05 10:33:21,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56704 conditions, 11132 events. 7146/11132 cut-off events. For 77359/78629 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 70682 event pairs, 1344 based on Foata normal form. 217/10905 useless extension candidates. Maximal degree in co-relation 56651. Up to 6796 conditions per place. [2024-02-05 10:33:21,936 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 138 selfloop transitions, 33 changer transitions 2/219 dead transitions. [2024-02-05 10:33:21,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 219 transitions, 2232 flow [2024-02-05 10:33:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-05 10:33:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-05 10:33:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 353 transitions. [2024-02-05 10:33:21,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6660377358490566 [2024-02-05 10:33:21,938 INFO L175 Difference]: Start difference. First operand has 97 places, 121 transitions, 1400 flow. Second operand 10 states and 353 transitions. [2024-02-05 10:33:21,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 219 transitions, 2232 flow [2024-02-05 10:33:22,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 219 transitions, 2121 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-02-05 10:33:22,012 INFO L231 Difference]: Finished difference. Result has 106 places, 137 transitions, 1586 flow [2024-02-05 10:33:22,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1586, PETRI_PLACES=106, PETRI_TRANSITIONS=137} [2024-02-05 10:33:22,013 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-02-05 10:33:22,013 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 137 transitions, 1586 flow [2024-02-05 10:33:22,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.692307692307693) internal successors, (373), 13 states have internal predecessors, (373), 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 10:33:22,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:22,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:22,025 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 10:33:22,225 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,SelfDestructingSolverStorable21 [2024-02-05 10:33:22,226 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:22,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1352773548, now seen corresponding path program 3 times [2024-02-05 10:33:22,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:22,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102853165] [2024-02-05 10:33:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:22,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:22,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:22,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102853165] [2024-02-05 10:33:22,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102853165] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:22,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162222095] [2024-02-05 10:33:22,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:33:22,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:22,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:22,420 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 10:33:22,440 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 10:33:22,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-05 10:33:22,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:22,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-05 10:33:22,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:22,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:23,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162222095] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:23,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:23,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-02-05 10:33:23,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213435658] [2024-02-05 10:33:23,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:23,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-05 10:33:23,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-05 10:33:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-05 10:33:23,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:33:23,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 137 transitions, 1586 flow. Second operand has 13 states, 13 states have (on average 28.692307692307693) internal successors, (373), 13 states have internal predecessors, (373), 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 10:33:23,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:23,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:33:23,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:24,714 INFO L124 PetriNetUnfolderBase]: 8694/13630 cut-off events. [2024-02-05 10:33:24,714 INFO L125 PetriNetUnfolderBase]: For 98204/99468 co-relation queries the response was YES. [2024-02-05 10:33:24,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69471 conditions, 13630 events. 8694/13630 cut-off events. For 98204/99468 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 90289 event pairs, 2266 based on Foata normal form. 167/13324 useless extension candidates. Maximal degree in co-relation 69415. Up to 9167 conditions per place. [2024-02-05 10:33:24,848 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 143 selfloop transitions, 31 changer transitions 1/221 dead transitions. [2024-02-05 10:33:24,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 221 transitions, 2453 flow [2024-02-05 10:33:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-05 10:33:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-05 10:33:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 333 transitions. [2024-02-05 10:33:24,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6283018867924528 [2024-02-05 10:33:24,850 INFO L175 Difference]: Start difference. First operand has 106 places, 137 transitions, 1586 flow. Second operand 10 states and 333 transitions. [2024-02-05 10:33:24,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 221 transitions, 2453 flow [2024-02-05 10:33:24,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 221 transitions, 2319 flow, removed 56 selfloop flow, removed 3 redundant places. [2024-02-05 10:33:24,933 INFO L231 Difference]: Finished difference. Result has 114 places, 155 transitions, 1813 flow [2024-02-05 10:33:24,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1452, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1813, PETRI_PLACES=114, PETRI_TRANSITIONS=155} [2024-02-05 10:33:24,934 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-02-05 10:33:24,934 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 155 transitions, 1813 flow [2024-02-05 10:33:24,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.692307692307693) internal successors, (373), 13 states have internal predecessors, (373), 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 10:33:24,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:24,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:24,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-05 10:33:25,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:25,136 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:25,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:25,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1981571906, now seen corresponding path program 4 times [2024-02-05 10:33:25,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:25,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158927550] [2024-02-05 10:33:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:25,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:25,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:25,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158927550] [2024-02-05 10:33:25,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158927550] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:25,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398278765] [2024-02-05 10:33:25,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:33:25,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:25,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:25,327 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 10:33:25,344 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 10:33:25,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:33:25,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:25,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-05 10:33:25,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:25,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:25,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398278765] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:25,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:25,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2024-02-05 10:33:25,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954562036] [2024-02-05 10:33:25,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:25,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-05 10:33:25,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:25,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-05 10:33:25,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-02-05 10:33:25,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:33:25,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 155 transitions, 1813 flow. Second operand has 10 states, 10 states have (on average 28.7) internal successors, (287), 10 states have internal predecessors, (287), 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 10:33:25,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:25,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:33:25,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:27,573 INFO L124 PetriNetUnfolderBase]: 10160/15910 cut-off events. [2024-02-05 10:33:27,573 INFO L125 PetriNetUnfolderBase]: For 117877/119349 co-relation queries the response was YES. [2024-02-05 10:33:27,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80878 conditions, 15910 events. 10160/15910 cut-off events. For 117877/119349 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 107469 event pairs, 2826 based on Foata normal form. 174/15541 useless extension candidates. Maximal degree in co-relation 80818. Up to 10960 conditions per place. [2024-02-05 10:33:27,750 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 161 selfloop transitions, 34 changer transitions 2/243 dead transitions. [2024-02-05 10:33:27,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 243 transitions, 2741 flow [2024-02-05 10:33:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-05 10:33:27,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-05 10:33:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 365 transitions. [2024-02-05 10:33:27,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260720411663808 [2024-02-05 10:33:27,762 INFO L175 Difference]: Start difference. First operand has 114 places, 155 transitions, 1813 flow. Second operand 11 states and 365 transitions. [2024-02-05 10:33:27,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 243 transitions, 2741 flow [2024-02-05 10:33:27,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 243 transitions, 2582 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-02-05 10:33:27,900 INFO L231 Difference]: Finished difference. Result has 124 places, 171 transitions, 2013 flow [2024-02-05 10:33:27,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2013, PETRI_PLACES=124, PETRI_TRANSITIONS=171} [2024-02-05 10:33:27,901 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-02-05 10:33:27,901 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 171 transitions, 2013 flow [2024-02-05 10:33:27,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 28.7) internal successors, (287), 10 states have internal predecessors, (287), 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 10:33:27,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:27,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:27,915 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 10:33:28,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:28,111 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:28,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:28,111 INFO L85 PathProgramCache]: Analyzing trace with hash -436157896, now seen corresponding path program 5 times [2024-02-05 10:33:28,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:28,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793734358] [2024-02-05 10:33:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:28,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:28,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:28,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793734358] [2024-02-05 10:33:28,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793734358] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:28,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707672572] [2024-02-05 10:33:28,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:33:28,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:28,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:28,288 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 10:33:28,290 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 10:33:28,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-05 10:33:28,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:28,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-05 10:33:28,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:28,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:28,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:29,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707672572] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:29,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:29,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-02-05 10:33:29,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157807308] [2024-02-05 10:33:29,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:29,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-05 10:33:29,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:29,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-05 10:33:29,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-05 10:33:29,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:33:29,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 171 transitions, 2013 flow. Second operand has 13 states, 13 states have (on average 28.692307692307693) internal successors, (373), 13 states have internal predecessors, (373), 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 10:33:29,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:29,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:33:29,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:31,523 INFO L124 PetriNetUnfolderBase]: 12066/18817 cut-off events. [2024-02-05 10:33:31,523 INFO L125 PetriNetUnfolderBase]: For 146070/147896 co-relation queries the response was YES. [2024-02-05 10:33:31,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96178 conditions, 18817 events. 12066/18817 cut-off events. For 146070/147896 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 129481 event pairs, 3645 based on Foata normal form. 196/18354 useless extension candidates. Maximal degree in co-relation 96114. Up to 13348 conditions per place. [2024-02-05 10:33:31,700 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 182 selfloop transitions, 37 changer transitions 2/267 dead transitions. [2024-02-05 10:33:31,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 267 transitions, 3183 flow [2024-02-05 10:33:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-05 10:33:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-05 10:33:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 341 transitions. [2024-02-05 10:33:31,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6433962264150943 [2024-02-05 10:33:31,702 INFO L175 Difference]: Start difference. First operand has 124 places, 171 transitions, 2013 flow. Second operand 10 states and 341 transitions. [2024-02-05 10:33:31,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 267 transitions, 3183 flow [2024-02-05 10:33:31,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 267 transitions, 2991 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-02-05 10:33:31,813 INFO L231 Difference]: Finished difference. Result has 132 places, 196 transitions, 2380 flow [2024-02-05 10:33:31,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2380, PETRI_PLACES=132, PETRI_TRANSITIONS=196} [2024-02-05 10:33:31,814 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-02-05 10:33:31,814 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 196 transitions, 2380 flow [2024-02-05 10:33:31,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.692307692307693) internal successors, (373), 13 states have internal predecessors, (373), 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 10:33:31,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:31,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:31,825 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 10:33:32,015 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,SelfDestructingSolverStorable24 [2024-02-05 10:33:32,020 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:32,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1772553060, now seen corresponding path program 6 times [2024-02-05 10:33:32,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:32,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747175794] [2024-02-05 10:33:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:32,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:32,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:32,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747175794] [2024-02-05 10:33:32,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747175794] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:32,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42017559] [2024-02-05 10:33:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:33:32,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:32,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:32,241 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 10:33:32,265 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 10:33:32,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-05 10:33:32,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:32,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-05 10:33:32,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:32,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:34,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42017559] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:34,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:34,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2024-02-05 10:33:34,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678544021] [2024-02-05 10:33:34,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:34,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-05 10:33:34,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:34,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-05 10:33:34,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-02-05 10:33:34,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 53 [2024-02-05 10:33:34,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 196 transitions, 2380 flow. Second operand has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 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 10:33:34,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:34,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 53 [2024-02-05 10:33:34,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:36,954 INFO L124 PetriNetUnfolderBase]: 13491/21058 cut-off events. [2024-02-05 10:33:36,955 INFO L125 PetriNetUnfolderBase]: For 169551/171593 co-relation queries the response was YES. [2024-02-05 10:33:37,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107737 conditions, 21058 events. 13491/21058 cut-off events. For 169551/171593 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 147648 event pairs, 4407 based on Foata normal form. 209/20558 useless extension candidates. Maximal degree in co-relation 107670. Up to 15197 conditions per place. [2024-02-05 10:33:37,302 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 199 selfloop transitions, 38 changer transitions 2/285 dead transitions. [2024-02-05 10:33:37,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 285 transitions, 3478 flow [2024-02-05 10:33:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-05 10:33:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-05 10:33:37,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 365 transitions. [2024-02-05 10:33:37,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260720411663808 [2024-02-05 10:33:37,304 INFO L175 Difference]: Start difference. First operand has 132 places, 196 transitions, 2380 flow. Second operand 11 states and 365 transitions. [2024-02-05 10:33:37,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 285 transitions, 3478 flow [2024-02-05 10:33:37,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 285 transitions, 3225 flow, removed 120 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:37,500 INFO L231 Difference]: Finished difference. Result has 143 places, 212 transitions, 2552 flow [2024-02-05 10:33:37,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2552, PETRI_PLACES=143, PETRI_TRANSITIONS=212} [2024-02-05 10:33:37,501 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-02-05 10:33:37,501 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 212 transitions, 2552 flow [2024-02-05 10:33:37,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.0) internal successors, (348), 12 states have internal predecessors, (348), 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 10:33:37,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:37,501 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:37,513 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 10:33:37,702 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,SelfDestructingSolverStorable25 [2024-02-05 10:33:37,702 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:37,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash 594879369, now seen corresponding path program 7 times [2024-02-05 10:33:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:37,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958250729] [2024-02-05 10:33:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:37,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:37,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:37,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958250729] [2024-02-05 10:33:37,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958250729] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:37,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765886070] [2024-02-05 10:33:37,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:33:37,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:37,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:37,848 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 10:33:37,869 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 10:33:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:37,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:33:37,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:38,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:38,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765886070] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:38,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:38,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-02-05 10:33:38,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944934102] [2024-02-05 10:33:38,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-05 10:33:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-05 10:33:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-02-05 10:33:38,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:33:38,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 212 transitions, 2552 flow. Second operand has 17 states, 17 states have (on average 24.352941176470587) internal successors, (414), 17 states have internal predecessors, (414), 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 10:33:38,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:38,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:33:38,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:49,389 INFO L124 PetriNetUnfolderBase]: 39952/56325 cut-off events. [2024-02-05 10:33:49,390 INFO L125 PetriNetUnfolderBase]: For 507491/507491 co-relation queries the response was YES. [2024-02-05 10:33:49,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306411 conditions, 56325 events. 39952/56325 cut-off events. For 507491/507491 co-relation queries the response was YES. Maximal size of possible extension queue 1666. Compared 356208 event pairs, 3496 based on Foata normal form. 1914/58227 useless extension candidates. Maximal degree in co-relation 306339. Up to 13127 conditions per place. [2024-02-05 10:33:50,131 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 1200 selfloop transitions, 1093 changer transitions 0/2297 dead transitions. [2024-02-05 10:33:50,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 2297 transitions, 31260 flow [2024-02-05 10:33:50,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2024-02-05 10:33:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2024-02-05 10:33:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 3180 transitions. [2024-02-05 10:33:50,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607476635514018 [2024-02-05 10:33:50,138 INFO L175 Difference]: Start difference. First operand has 143 places, 212 transitions, 2552 flow. Second operand 107 states and 3180 transitions. [2024-02-05 10:33:50,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 2297 transitions, 31260 flow [2024-02-05 10:33:51,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 2297 transitions, 29677 flow, removed 744 selfloop flow, removed 4 redundant places. [2024-02-05 10:33:51,151 INFO L231 Difference]: Finished difference. Result has 311 places, 1318 transitions, 20298 flow [2024-02-05 10:33:51,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=20298, PETRI_PLACES=311, PETRI_TRANSITIONS=1318} [2024-02-05 10:33:51,152 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 255 predicate places. [2024-02-05 10:33:51,152 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 1318 transitions, 20298 flow [2024-02-05 10:33:51,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 24.352941176470587) internal successors, (414), 17 states have internal predecessors, (414), 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 10:33:51,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:51,153 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:51,164 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 10:33:51,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:51,360 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:33:51,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:51,361 INFO L85 PathProgramCache]: Analyzing trace with hash -47849705, now seen corresponding path program 8 times [2024-02-05 10:33:51,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:51,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769426046] [2024-02-05 10:33:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:51,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:51,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:51,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769426046] [2024-02-05 10:33:51,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769426046] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:51,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299536799] [2024-02-05 10:33:51,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:33:51,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:51,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:51,475 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 10:33:51,477 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 10:33:51,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:33:51,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:51,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:33:51,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:51,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:51,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299536799] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:51,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:51,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-05 10:33:51,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060885470] [2024-02-05 10:33:51,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:51,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-05 10:33:51,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:51,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-05 10:33:51,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-02-05 10:33:51,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-02-05 10:33:51,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 1318 transitions, 20298 flow. Second operand has 13 states, 13 states have (on average 24.615384615384617) internal successors, (320), 13 states have internal predecessors, (320), 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 10:33:51,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:51,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-02-05 10:33:51,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:12,458 INFO L124 PetriNetUnfolderBase]: 50066/71356 cut-off events. [2024-02-05 10:34:12,459 INFO L125 PetriNetUnfolderBase]: For 3539616/3544005 co-relation queries the response was YES. [2024-02-05 10:34:14,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611403 conditions, 71356 events. 50066/71356 cut-off events. For 3539616/3544005 co-relation queries the response was YES. Maximal size of possible extension queue 2400. Compared 483199 event pairs, 12001 based on Foata normal form. 1185/71217 useless extension candidates. Maximal degree in co-relation 611268. Up to 38204 conditions per place. [2024-02-05 10:34:15,334 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 1696 selfloop transitions, 954 changer transitions 0/2799 dead transitions. [2024-02-05 10:34:15,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 2799 transitions, 47186 flow [2024-02-05 10:34:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-05 10:34:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-05 10:34:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 579 transitions. [2024-02-05 10:34:15,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6426193118756937 [2024-02-05 10:34:15,336 INFO L175 Difference]: Start difference. First operand has 311 places, 1318 transitions, 20298 flow. Second operand 17 states and 579 transitions. [2024-02-05 10:34:15,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 2799 transitions, 47186 flow [2024-02-05 10:35:24,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 2799 transitions, 43888 flow, removed 1589 selfloop flow, removed 1 redundant places. [2024-02-05 10:35:24,855 INFO L231 Difference]: Finished difference. Result has 337 places, 1983 transitions, 31418 flow [2024-02-05 10:35:24,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=18221, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=858, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=31418, PETRI_PLACES=337, PETRI_TRANSITIONS=1983} [2024-02-05 10:35:24,856 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 281 predicate places. [2024-02-05 10:35:24,856 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 1983 transitions, 31418 flow [2024-02-05 10:35:24,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 24.615384615384617) internal successors, (320), 13 states have internal predecessors, (320), 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 10:35:24,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:24,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:35:24,871 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 10:35:25,060 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,SelfDestructingSolverStorable27 [2024-02-05 10:35:25,061 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 23 more)] === [2024-02-05 10:35:25,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:25,061 INFO L85 PathProgramCache]: Analyzing trace with hash -157640451, now seen corresponding path program 9 times [2024-02-05 10:35:25,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:25,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480748507] [2024-02-05 10:35:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:25,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:35:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480748507] [2024-02-05 10:35:25,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480748507] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:25,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774981690] [2024-02-05 10:35:25,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:35:25,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:25,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:25,217 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 10:35:25,218 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 10:35:25,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-02-05 10:35:25,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:25,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:35:25,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:35:25,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:35:25,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774981690] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:25,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:25,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-05 10:35:25,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814789093] [2024-02-05 10:35:25,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:25,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-05 10:35:25,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-05 10:35:25,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-02-05 10:35:25,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-02-05 10:35:25,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 1983 transitions, 31418 flow. Second operand has 13 states, 13 states have (on average 23.692307692307693) internal successors, (308), 13 states have internal predecessors, (308), 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 10:35:25,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:25,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-02-05 10:35:25,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand