./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-comm.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-comm.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-comm.wvr.c ./goblint.2024-01-24_13-31-21.files/SV-COMP24_unreach-call/mult-comm.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 10:33:02,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-05 10:33:02,225 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-05 10:33:02,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-05 10:33:02,231 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-05 10:33:02,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-05 10:33:02,283 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-05 10:33:02,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-05 10:33:02,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-05 10:33:02,287 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-05 10:33:02,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-05 10:33:02,287 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-05 10:33:02,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-05 10:33:02,289 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-05 10:33:02,289 INFO L153 SettingsManager]: * Use SBE=true [2024-02-05 10:33:02,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-05 10:33:02,290 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-05 10:33:02,290 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-05 10:33:02,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-05 10:33:02,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-05 10:33:02,290 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-05 10:33:02,291 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-05 10:33:02,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-05 10:33:02,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-05 10:33:02,291 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-05 10:33:02,291 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-05 10:33:02,292 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-05 10:33:02,292 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-05 10:33:02,292 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-05 10:33:02,293 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-05 10:33:02,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-05 10:33:02,294 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-05 10:33:02,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:33:02,294 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-05 10:33:02,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-05 10:33:02,294 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-05 10:33:02,295 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-05 10:33:02,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-05 10:33:02,295 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-05 10:33:02,295 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-05 10:33:02,295 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-05 10:33:02,296 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-05 10:33:02,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-05 10:33:02,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-05 10:33:02,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-05 10:33:02,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-05 10:33:02,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-05 10:33:02,543 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-05 10:33:02,543 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-05 10:33:02,544 INFO L431 ainManager$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-comm.wvr.yml/witness.yml [2024-02-05 10:33:02,647 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-05 10:33:02,648 INFO L274 PluginConnector]: CDTParser initialized [2024-02-05 10:33:02,648 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2024-02-05 10:33:03,802 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-05 10:33:03,990 INFO L384 CDTParser]: Found 1 translation units. [2024-02-05 10:33:03,990 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2024-02-05 10:33:03,997 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25277d728/1fce0341af9d46ceaafcb9dee4a6c1c6/FLAG91d2d4122 [2024-02-05 10:33:04,015 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25277d728/1fce0341af9d46ceaafcb9dee4a6c1c6 [2024-02-05 10:33:04,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-05 10:33:04,017 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-05 10:33:04,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-05 10:33:04,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-05 10:33:04,023 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-05 10:33:04,023 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:33:02" (1/2) ... [2024-02-05 10:33:04,024 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603e49c5 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 10:33:04,024 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:33:02" (1/2) ... [2024-02-05 10:33:04,025 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4f71a4df 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 10:33:04,026 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:33:04" (2/2) ... [2024-02-05 10:33:04,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603e49c5 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 10:33:04,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 10:33:04" (2/2) ... [2024-02-05 10:33:04,026 INFO L86 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-05 10:33:04,047 INFO L99 nessWitnessExtractor]: Found the following entries in the witness: [2024-02-05 10:33:04,048 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 10:33:04,048 INFO L101 nessWitnessExtractor]: Location invariant before [L61-L61] ((((((((0LL - (long long )a) + (long long )b >= 0LL) && ((long long )a + (long long )b >= 0LL)) && ((0LL - (long long )a) - (long long )b >= 0LL)) && ((long long )a - (long long )b >= 0LL)) && (x_1 == 0U)) && (x_2 == 0U)) && (a == 0U)) && (b == 0U) [2024-02-05 10:33:04,048 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 10:33:04,048 INFO L101 nessWitnessExtractor]: Location invariant before [L54-L54] (unsigned long )_argptr == 0UL [2024-02-05 10:33:04,048 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 10:33:04,049 INFO L101 nessWitnessExtractor]: Location invariant before [L46-L46] (unsigned long )_argptr == 0UL [2024-02-05 10:33:04,049 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 10:33:04,049 INFO L101 nessWitnessExtractor]: Location invariant before [L62-L62] ((x_1 == 0U) && (x_2 == 0U)) && (b == 0U) [2024-02-05 10:33:04,049 INFO L101 nessWitnessExtractor]: Location invariant before [L64-L64] (x_1 == 0U) && (x_2 == 0U) [2024-02-05 10:33:04,066 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-02-05 10:33:04,210 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-comm.wvr.c[1936,1949] [2024-02-05 10:33:04,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:33:04,220 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 [2024-02-05 10:33:04,304 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-comm.wvr.c[1936,1949] [2024-02-05 10:33:04,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-05 10:33:04,319 INFO L208 MainTranslator]: Completed translation [2024-02-05 10:33:04,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 10:33:04 WrapperNode [2024-02-05 10:33:04,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-05 10:33:04,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-05 10:33:04,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-05 10:33:04,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-05 10:33:04,326 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 10:33:04,336 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 10:33:04,350 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2024-02-05 10:33:04,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-05 10:33:04,351 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-05 10:33:04,351 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-05 10:33:04,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-05 10:33:04,359 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 10:33:04,359 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 10:33:04,361 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 10:33:04,371 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-05 10:33:04,371 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 10:33:04,372 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 10:33:04,376 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 10:33:04,378 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 10:33:04,379 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 10:33:04,380 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 10:33:04,413 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-05 10:33:04,421 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-05 10:33:04,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-05 10:33:04,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-05 10:33:04,423 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 10:33:04,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-05 10:33:04,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:04,455 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 10:33:04,470 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 10:33:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-05 10:33:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-05 10:33:04,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-05 10:33:04,506 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-05 10:33:04,506 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-05 10:33:04,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-05 10:33:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-05 10:33:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-05 10:33:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-05 10:33:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-05 10:33:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-05 10:33:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-05 10:33:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-05 10:33:04,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-05 10:33:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-05 10:33:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-05 10:33:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-05 10:33:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-05 10:33:04,514 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 10:33:04,628 INFO L244 CfgBuilder]: Building ICFG [2024-02-05 10:33:04,630 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-05 10:33:04,855 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-05 10:33:04,866 INFO L293 CfgBuilder]: Performing block encoding [2024-02-05 10:33:04,983 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-05 10:33:04,983 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-05 10:33:04,984 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:33:04 BoogieIcfgContainer [2024-02-05 10:33:04,984 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-05 10:33:04,985 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-05 10:33:04,985 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-05 10:33:04,988 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-05 10:33:04,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 05.02 10:33:02" (1/4) ... [2024-02-05 10:33:04,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6507eee5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 05.02 10:33:04, skipping insertion in model container [2024-02-05 10:33:04,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 10:33:04" (2/4) ... [2024-02-05 10:33:04,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6507eee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:33:04, skipping insertion in model container [2024-02-05 10:33:04,989 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 10:33:04,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6507eee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 10:33:04, skipping insertion in model container [2024-02-05 10:33:04,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.02 10:33:04" (4/4) ... [2024-02-05 10:33:04,990 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2024-02-05 10:33:05,005 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-05 10:33:05,006 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-02-05 10:33:05,006 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-05 10:33:05,052 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-05 10:33:05,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 88 flow [2024-02-05 10:33:05,094 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2024-02-05 10:33:05,094 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:33:05,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 2/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-02-05 10:33:05,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 88 flow [2024-02-05 10:33:05,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 80 flow [2024-02-05 10:33:05,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-05 10:33:05,110 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;@17ff5d87, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-05 10:33:05,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-02-05 10:33:05,112 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-05 10:33:05,112 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-05 10:33:05,112 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-05 10:33:05,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:05,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-05 10:33:05,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:05,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:05,117 INFO L85 PathProgramCache]: Analyzing trace with hash 7887, now seen corresponding path program 1 times [2024-02-05 10:33:05,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:05,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042207580] [2024-02-05 10:33:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:05,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:05,586 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 10:33:05,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:05,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042207580] [2024-02-05 10:33:05,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042207580] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:05,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:05,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-05 10:33:05,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472063273] [2024-02-05 10:33:05,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:05,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:05,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:05,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-02-05 10:33:05,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 10:33:05,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:05,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-02-05 10:33:05,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:05,760 INFO L124 PetriNetUnfolderBase]: 96/209 cut-off events. [2024-02-05 10:33:05,761 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-02-05 10:33:05,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 209 events. 96/209 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 787 event pairs, 72 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 334. Up to 174 conditions per place. [2024-02-05 10:33:05,765 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 22 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-02-05 10:33:05,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 126 flow [2024-02-05 10:33:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-02-05 10:33:05,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2024-02-05 10:33:05,777 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 80 flow. Second operand 3 states and 58 transitions. [2024-02-05 10:33:05,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 126 flow [2024-02-05 10:33:05,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 118 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-05 10:33:05,781 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 74 flow [2024-02-05 10:33:05,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2024-02-05 10:33:05,786 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2024-02-05 10:33:05,786 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 74 flow [2024-02-05 10:33:05,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 10:33:05,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:05,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-02-05 10:33:05,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-05 10:33:05,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:05,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash 244743, now seen corresponding path program 1 times [2024-02-05 10:33:05,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:05,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150461559] [2024-02-05 10:33:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:05,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:05,848 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 10:33:05,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:05,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150461559] [2024-02-05 10:33:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150461559] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:05,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:05,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:05,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431543213] [2024-02-05 10:33:05,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:05,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:05,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:05,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:05,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:05,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:33:05,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 10:33:05,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:05,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:33:05,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:05,953 INFO L124 PetriNetUnfolderBase]: 79/173 cut-off events. [2024-02-05 10:33:05,954 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:33:05,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 173 events. 79/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 591 event pairs, 57 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 319. Up to 143 conditions per place. [2024-02-05 10:33:05,956 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 20 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-02-05 10:33:05,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 116 flow [2024-02-05 10:33:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:05,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-02-05 10:33:05,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-02-05 10:33:05,962 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 74 flow. Second operand 3 states and 62 transitions. [2024-02-05 10:33:05,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 116 flow [2024-02-05 10:33:05,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:05,967 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 72 flow [2024-02-05 10:33:05,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2024-02-05 10:33:05,968 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2024-02-05 10:33:05,968 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 72 flow [2024-02-05 10:33:05,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 10:33:05,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:05,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-02-05 10:33:05,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-05 10:33:05,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:05,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:05,970 INFO L85 PathProgramCache]: Analyzing trace with hash 7587270, now seen corresponding path program 1 times [2024-02-05 10:33:05,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:05,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548817880] [2024-02-05 10:33:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:05,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:06,011 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 10:33:06,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:06,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548817880] [2024-02-05 10:33:06,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548817880] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:06,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:06,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-05 10:33:06,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250975657] [2024-02-05 10:33:06,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:06,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-05 10:33:06,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:06,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-05 10:33:06,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-05 10:33:06,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-02-05 10:33:06,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 10:33:06,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:06,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-02-05 10:33:06,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:06,090 INFO L124 PetriNetUnfolderBase]: 124/284 cut-off events. [2024-02-05 10:33:06,091 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-05 10:33:06,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 284 events. 124/284 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1258 event pairs, 45 based on Foata normal form. 1/278 useless extension candidates. Maximal degree in co-relation 509. Up to 126 conditions per place. [2024-02-05 10:33:06,093 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 30 selfloop transitions, 3 changer transitions 1/45 dead transitions. [2024-02-05 10:33:06,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 169 flow [2024-02-05 10:33:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-05 10:33:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-05 10:33:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-02-05 10:33:06,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2024-02-05 10:33:06,094 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 72 flow. Second operand 3 states and 81 transitions. [2024-02-05 10:33:06,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 169 flow [2024-02-05 10:33:06,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 165 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:06,096 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 85 flow [2024-02-05 10:33:06,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-02-05 10:33:06,096 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2024-02-05 10:33:06,096 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 85 flow [2024-02-05 10:33:06,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 10:33:06,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:06,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:06,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-05 10:33:06,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:06,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:06,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1600639607, now seen corresponding path program 1 times [2024-02-05 10:33:06,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:06,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458047570] [2024-02-05 10:33:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:06,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:06,234 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 10:33:06,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:06,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458047570] [2024-02-05 10:33:06,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458047570] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:06,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:06,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:06,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736058295] [2024-02-05 10:33:06,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:06,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:06,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:33:06,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 10:33:06,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:06,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:33:06,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:06,323 INFO L124 PetriNetUnfolderBase]: 147/337 cut-off events. [2024-02-05 10:33:06,323 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-02-05 10:33:06,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 337 events. 147/337 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1569 event pairs, 54 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 282. Up to 234 conditions per place. [2024-02-05 10:33:06,326 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 29 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-02-05 10:33:06,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 165 flow [2024-02-05 10:33:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-02-05 10:33:06,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540540540540541 [2024-02-05 10:33:06,331 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 85 flow. Second operand 4 states and 82 transitions. [2024-02-05 10:33:06,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 165 flow [2024-02-05 10:33:06,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:06,333 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 82 flow [2024-02-05 10:33:06,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-02-05 10:33:06,334 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2024-02-05 10:33:06,334 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 82 flow [2024-02-05 10:33:06,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 10:33:06,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:06,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:06,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-05 10:33:06,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:06,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash -616362260, now seen corresponding path program 1 times [2024-02-05 10:33:06,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:06,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944111985] [2024-02-05 10:33:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:06,474 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 10:33:06,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:06,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944111985] [2024-02-05 10:33:06,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944111985] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:06,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:06,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:06,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561397366] [2024-02-05 10:33:06,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:06,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:06,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:06,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:06,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:06,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-02-05 10:33:06,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 10:33:06,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:06,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-02-05 10:33:06,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:06,574 INFO L124 PetriNetUnfolderBase]: 190/352 cut-off events. [2024-02-05 10:33:06,574 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-02-05 10:33:06,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 767 conditions, 352 events. 190/352 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1467 event pairs, 27 based on Foata normal form. 20/340 useless extension candidates. Maximal degree in co-relation 641. Up to 171 conditions per place. [2024-02-05 10:33:06,576 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 37 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-02-05 10:33:06,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 210 flow [2024-02-05 10:33:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-02-05 10:33:06,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608108108108109 [2024-02-05 10:33:06,578 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 82 flow. Second operand 4 states and 83 transitions. [2024-02-05 10:33:06,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 210 flow [2024-02-05 10:33:06,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:06,579 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 104 flow [2024-02-05 10:33:06,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-02-05 10:33:06,580 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2024-02-05 10:33:06,580 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 104 flow [2024-02-05 10:33:06,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 10:33:06,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:06,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:06,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-05 10:33:06,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:06,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash -617207749, now seen corresponding path program 1 times [2024-02-05 10:33:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:06,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384871125] [2024-02-05 10:33:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:06,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:06,690 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 10:33:06,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:06,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384871125] [2024-02-05 10:33:06,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384871125] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:06,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:06,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:06,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086273064] [2024-02-05 10:33:06,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:06,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:06,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:06,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:06,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:06,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:33:06,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 10:33:06,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:06,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:33:06,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:06,769 INFO L124 PetriNetUnfolderBase]: 164/335 cut-off events. [2024-02-05 10:33:06,769 INFO L125 PetriNetUnfolderBase]: For 350/392 co-relation queries the response was YES. [2024-02-05 10:33:06,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 335 events. 164/335 cut-off events. For 350/392 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1453 event pairs, 6 based on Foata normal form. 10/343 useless extension candidates. Maximal degree in co-relation 800. Up to 229 conditions per place. [2024-02-05 10:33:06,771 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 37 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-02-05 10:33:06,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 251 flow [2024-02-05 10:33:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-02-05 10:33:06,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581081081081081 [2024-02-05 10:33:06,772 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 104 flow. Second operand 4 states and 86 transitions. [2024-02-05 10:33:06,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 251 flow [2024-02-05 10:33:06,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:06,774 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 103 flow [2024-02-05 10:33:06,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2024-02-05 10:33:06,774 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2024-02-05 10:33:06,775 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 103 flow [2024-02-05 10:33:06,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 10:33:06,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:06,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:06,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-05 10:33:06,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:06,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -431151554, now seen corresponding path program 1 times [2024-02-05 10:33:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:06,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675655327] [2024-02-05 10:33:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:06,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:06,886 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 10:33:06,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:06,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675655327] [2024-02-05 10:33:06,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675655327] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-05 10:33:06,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-05 10:33:06,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-05 10:33:06,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912750082] [2024-02-05 10:33:06,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:06,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-05 10:33:06,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:06,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-05 10:33:06,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-05 10:33:06,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-02-05 10:33:06,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 10:33:06,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:06,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-02-05 10:33:06,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:06,969 INFO L124 PetriNetUnfolderBase]: 216/373 cut-off events. [2024-02-05 10:33:06,970 INFO L125 PetriNetUnfolderBase]: For 386/440 co-relation queries the response was YES. [2024-02-05 10:33:06,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1005 conditions, 373 events. 216/373 cut-off events. For 386/440 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1388 event pairs, 41 based on Foata normal form. 36/377 useless extension candidates. Maximal degree in co-relation 985. Up to 162 conditions per place. [2024-02-05 10:33:06,971 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 40 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-02-05 10:33:06,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 273 flow [2024-02-05 10:33:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-05 10:33:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-05 10:33:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-02-05 10:33:06,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608108108108109 [2024-02-05 10:33:06,972 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 103 flow. Second operand 4 states and 83 transitions. [2024-02-05 10:33:06,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 273 flow [2024-02-05 10:33:06,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 49 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:06,974 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 125 flow [2024-02-05 10:33:06,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2024-02-05 10:33:06,975 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-02-05 10:33:06,975 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 125 flow [2024-02-05 10:33:06,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 10:33:06,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:06,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:06,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-05 10:33:06,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:06,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:06,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1942936233, now seen corresponding path program 1 times [2024-02-05 10:33:06,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:06,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935060295] [2024-02-05 10:33:06,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:06,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:07,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:07,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935060295] [2024-02-05 10:33:07,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935060295] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:07,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373909776] [2024-02-05 10:33:07,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:07,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:07,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:07,170 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 10:33:07,196 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 10:33:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:07,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:33:07,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:07,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:07,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373909776] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:07,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:07,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2024-02-05 10:33:07,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151609360] [2024-02-05 10:33:07,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:07,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:33:07,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:33:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:33:07,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-02-05 10:33:07,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 125 flow. Second operand has 14 states, 14 states have (on average 18.071428571428573) internal successors, (253), 14 states have internal predecessors, (253), 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 10:33:07,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:07,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-02-05 10:33:07,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:07,952 INFO L124 PetriNetUnfolderBase]: 403/757 cut-off events. [2024-02-05 10:33:07,952 INFO L125 PetriNetUnfolderBase]: For 742/802 co-relation queries the response was YES. [2024-02-05 10:33:07,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 757 events. 403/757 cut-off events. For 742/802 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3660 event pairs, 57 based on Foata normal form. 27/780 useless extension candidates. Maximal degree in co-relation 2254. Up to 145 conditions per place. [2024-02-05 10:33:07,956 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 87 selfloop transitions, 27 changer transitions 16/135 dead transitions. [2024-02-05 10:33:07,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 135 transitions, 773 flow [2024-02-05 10:33:07,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-05 10:33:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-05 10:33:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 329 transitions. [2024-02-05 10:33:07,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2024-02-05 10:33:07,958 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 125 flow. Second operand 14 states and 329 transitions. [2024-02-05 10:33:07,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 135 transitions, 773 flow [2024-02-05 10:33:07,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 135 transitions, 770 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-05 10:33:07,963 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 383 flow [2024-02-05 10:33:07,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=383, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-02-05 10:33:07,965 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2024-02-05 10:33:07,966 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 383 flow [2024-02-05 10:33:07,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.071428571428573) internal successors, (253), 14 states have internal predecessors, (253), 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 10:33:07,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:07,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:07,997 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 10:33:08,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:08,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:08,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2076900495, now seen corresponding path program 2 times [2024-02-05 10:33:08,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:08,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561214653] [2024-02-05 10:33:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:08,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:08,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:08,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561214653] [2024-02-05 10:33:08,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561214653] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:08,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147330730] [2024-02-05 10:33:08,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:33:08,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:08,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:08,390 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 10:33:08,392 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 10:33:08,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:33:08,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:08,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:33:08,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:08,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-05 10:33:08,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147330730] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:08,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-05 10:33:08,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 14 [2024-02-05 10:33:08,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643806672] [2024-02-05 10:33:08,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-05 10:33:08,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-05 10:33:08,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:08,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-05 10:33:08,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:33:08,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-02-05 10:33:08,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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 10:33:08,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:08,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-02-05 10:33:08,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:08,869 INFO L124 PetriNetUnfolderBase]: 370/748 cut-off events. [2024-02-05 10:33:08,869 INFO L125 PetriNetUnfolderBase]: For 1746/1830 co-relation queries the response was YES. [2024-02-05 10:33:08,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2623 conditions, 748 events. 370/748 cut-off events. For 1746/1830 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3906 event pairs, 115 based on Foata normal form. 32/774 useless extension candidates. Maximal degree in co-relation 2592. Up to 507 conditions per place. [2024-02-05 10:33:08,873 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 52 selfloop transitions, 6 changer transitions 13/81 dead transitions. [2024-02-05 10:33:08,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 650 flow [2024-02-05 10:33:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-05 10:33:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-05 10:33:08,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-02-05 10:33:08,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6972972972972973 [2024-02-05 10:33:08,874 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 383 flow. Second operand 5 states and 129 transitions. [2024-02-05 10:33:08,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 650 flow [2024-02-05 10:33:08,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 621 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-02-05 10:33:08,880 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 387 flow [2024-02-05 10:33:08,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-02-05 10:33:08,880 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 23 predicate places. [2024-02-05 10:33:08,880 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 387 flow [2024-02-05 10:33:08,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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 10:33:08,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:08,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:08,908 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 10:33:09,092 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,SelfDestructingSolverStorable8 [2024-02-05 10:33:09,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:09,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1997954195, now seen corresponding path program 3 times [2024-02-05 10:33:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697492445] [2024-02-05 10:33:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:09,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:09,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:09,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697492445] [2024-02-05 10:33:09,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697492445] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:09,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507307193] [2024-02-05 10:33:09,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:33:09,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:09,297 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 10:33:09,322 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 10:33:09,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-05 10:33:09,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:09,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-05 10:33:09,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:09,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:09,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507307193] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:09,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:09,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2024-02-05 10:33:09,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733800783] [2024-02-05 10:33:09,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:09,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-05 10:33:09,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:09,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-05 10:33:09,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2024-02-05 10:33:09,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-02-05 10:33:09,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 387 flow. Second operand has 14 states, 14 states have (on average 18.071428571428573) internal successors, (253), 14 states have internal predecessors, (253), 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 10:33:09,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:09,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-02-05 10:33:09,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:10,063 INFO L124 PetriNetUnfolderBase]: 430/802 cut-off events. [2024-02-05 10:33:10,063 INFO L125 PetriNetUnfolderBase]: For 1835/1897 co-relation queries the response was YES. [2024-02-05 10:33:10,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2933 conditions, 802 events. 430/802 cut-off events. For 1835/1897 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3918 event pairs, 83 based on Foata normal form. 36/834 useless extension candidates. Maximal degree in co-relation 2898. Up to 402 conditions per place. [2024-02-05 10:33:10,068 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 77 selfloop transitions, 26 changer transitions 10/118 dead transitions. [2024-02-05 10:33:10,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 118 transitions, 891 flow [2024-02-05 10:33:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-05 10:33:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-05 10:33:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-02-05 10:33:10,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2024-02-05 10:33:10,069 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 387 flow. Second operand 10 states and 235 transitions. [2024-02-05 10:33:10,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 118 transitions, 891 flow [2024-02-05 10:33:10,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 861 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-02-05 10:33:10,075 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 592 flow [2024-02-05 10:33:10,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=592, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-02-05 10:33:10,076 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 32 predicate places. [2024-02-05 10:33:10,076 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 592 flow [2024-02-05 10:33:10,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.071428571428573) internal successors, (253), 14 states have internal predecessors, (253), 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 10:33:10,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:10,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:10,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-05 10:33:10,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:10,288 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:10,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:10,289 INFO L85 PathProgramCache]: Analyzing trace with hash 77687417, now seen corresponding path program 1 times [2024-02-05 10:33:10,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:10,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685301226] [2024-02-05 10:33:10,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:10,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:10,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:10,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685301226] [2024-02-05 10:33:10,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685301226] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:10,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637293755] [2024-02-05 10:33:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:10,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:10,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:10,422 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 10:33:10,443 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 10:33:10,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:10,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-05 10:33:10,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:10,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:10,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637293755] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:10,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:10,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-02-05 10:33:10,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705826728] [2024-02-05 10:33:10,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:10,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-02-05 10:33:10,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:10,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-02-05 10:33:10,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-02-05 10:33:10,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-02-05 10:33:10,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 592 flow. Second operand has 10 states, 10 states have (on average 16.8) internal successors, (168), 10 states have internal predecessors, (168), 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 10:33:10,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:10,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-02-05 10:33:10,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:10,913 INFO L124 PetriNetUnfolderBase]: 476/894 cut-off events. [2024-02-05 10:33:10,914 INFO L125 PetriNetUnfolderBase]: For 3058/3092 co-relation queries the response was YES. [2024-02-05 10:33:10,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3530 conditions, 894 events. 476/894 cut-off events. For 3058/3092 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4511 event pairs, 109 based on Foata normal form. 5/891 useless extension candidates. Maximal degree in co-relation 3494. Up to 567 conditions per place. [2024-02-05 10:33:10,919 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 58 selfloop transitions, 17 changer transitions 18/103 dead transitions. [2024-02-05 10:33:10,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 103 transitions, 919 flow [2024-02-05 10:33:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-05 10:33:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-05 10:33:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-02-05 10:33:10,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6061776061776062 [2024-02-05 10:33:10,921 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 592 flow. Second operand 7 states and 157 transitions. [2024-02-05 10:33:10,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 103 transitions, 919 flow [2024-02-05 10:33:10,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 103 transitions, 857 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-02-05 10:33:10,928 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 605 flow [2024-02-05 10:33:10,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=605, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-02-05 10:33:10,928 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 35 predicate places. [2024-02-05 10:33:10,928 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 605 flow [2024-02-05 10:33:10,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.8) internal successors, (168), 10 states have internal predecessors, (168), 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 10:33:10,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:10,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-05 10:33:10,943 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 10:33:11,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:11,141 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:11,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:11,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2011535135, now seen corresponding path program 2 times [2024-02-05 10:33:11,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:11,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612857591] [2024-02-05 10:33:11,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:11,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:11,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:11,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612857591] [2024-02-05 10:33:11,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612857591] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:11,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799622130] [2024-02-05 10:33:11,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:33:11,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:11,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:11,346 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 10:33:11,370 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 10:33:11,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:33:11,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:11,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-05 10:33:11,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:11,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:11,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799622130] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:11,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:11,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-02-05 10:33:11,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359491957] [2024-02-05 10:33:11,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:11,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-05 10:33:11,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:11,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-05 10:33:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-02-05 10:33:11,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-02-05 10:33:11,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 605 flow. Second operand has 11 states, 11 states have (on average 17.818181818181817) internal successors, (196), 11 states have internal predecessors, (196), 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 10:33:11,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:11,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-02-05 10:33:11,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:11,880 INFO L124 PetriNetUnfolderBase]: 535/982 cut-off events. [2024-02-05 10:33:11,881 INFO L125 PetriNetUnfolderBase]: For 2733/2765 co-relation queries the response was YES. [2024-02-05 10:33:11,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3768 conditions, 982 events. 535/982 cut-off events. For 2733/2765 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5028 event pairs, 89 based on Foata normal form. 12/988 useless extension candidates. Maximal degree in co-relation 3729. Up to 528 conditions per place. [2024-02-05 10:33:11,886 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 79 selfloop transitions, 44 changer transitions 7/140 dead transitions. [2024-02-05 10:33:11,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 140 transitions, 1265 flow [2024-02-05 10:33:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-05 10:33:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-05 10:33:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-02-05 10:33:11,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-02-05 10:33:11,888 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 605 flow. Second operand 10 states and 230 transitions. [2024-02-05 10:33:11,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 140 transitions, 1265 flow [2024-02-05 10:33:11,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 140 transitions, 1230 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-02-05 10:33:11,895 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 955 flow [2024-02-05 10:33:11,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=955, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2024-02-05 10:33:11,895 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 43 predicate places. [2024-02-05 10:33:11,895 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 955 flow [2024-02-05 10:33:11,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.818181818181817) internal successors, (196), 11 states have internal predecessors, (196), 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 10:33:11,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:11,896 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] [2024-02-05 10:33:11,922 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 10:33:12,108 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,SelfDestructingSolverStorable11 [2024-02-05 10:33:12,109 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 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 98742361, now seen corresponding path program 3 times [2024-02-05 10:33:12,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:12,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867941395] [2024-02-05 10:33:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:12,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:12,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867941395] [2024-02-05 10:33:12,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867941395] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:12,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404715842] [2024-02-05 10:33:12,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:33:12,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:12,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:12,398 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 10:33:12,425 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 10:33:12,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-05 10:33:12,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:12,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-05 10:33:12,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:12,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:12,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404715842] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:12,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:12,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-02-05 10:33:12,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280335434] [2024-02-05 10:33:12,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:12,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-05 10:33:12,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:12,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-05 10:33:12,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-02-05 10:33:12,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-02-05 10:33:12,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 955 flow. Second operand has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 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 10:33:12,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:12,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-02-05 10:33:12,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:13,048 INFO L124 PetriNetUnfolderBase]: 672/1244 cut-off events. [2024-02-05 10:33:13,049 INFO L125 PetriNetUnfolderBase]: For 4735/4785 co-relation queries the response was YES. [2024-02-05 10:33:13,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5157 conditions, 1244 events. 672/1244 cut-off events. For 4735/4785 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6849 event pairs, 97 based on Foata normal form. 29/1264 useless extension candidates. Maximal degree in co-relation 5115. Up to 442 conditions per place. [2024-02-05 10:33:13,057 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 96 selfloop transitions, 67 changer transitions 11/184 dead transitions. [2024-02-05 10:33:13,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 184 transitions, 1822 flow [2024-02-05 10:33:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-05 10:33:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-05 10:33:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 318 transitions. [2024-02-05 10:33:13,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138996138996139 [2024-02-05 10:33:13,059 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 955 flow. Second operand 14 states and 318 transitions. [2024-02-05 10:33:13,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 184 transitions, 1822 flow [2024-02-05 10:33:13,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 184 transitions, 1801 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-02-05 10:33:13,070 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 1364 flow [2024-02-05 10:33:13,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1364, PETRI_PLACES=96, PETRI_TRANSITIONS=112} [2024-02-05 10:33:13,071 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 57 predicate places. [2024-02-05 10:33:13,071 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 1364 flow [2024-02-05 10:33:13,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 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 10:33:13,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:13,072 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] [2024-02-05 10:33:13,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-05 10:33:13,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:13,284 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:13,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:13,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2116634416, now seen corresponding path program 1 times [2024-02-05 10:33:13,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:13,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287431663] [2024-02-05 10:33:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:13,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:13,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:13,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287431663] [2024-02-05 10:33:13,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287431663] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:13,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393728649] [2024-02-05 10:33:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:13,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:13,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:13,790 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 10:33:13,833 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 10:33:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:13,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:33:13,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:14,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:14,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393728649] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:14,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:14,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-02-05 10:33:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777603776] [2024-02-05 10:33:14,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:14,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-05 10:33:14,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:14,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-05 10:33:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2024-02-05 10:33:19,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:33:19,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-02-05 10:33:19,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 112 transitions, 1364 flow. Second operand has 25 states, 25 states have (on average 13.12) internal successors, (328), 25 states have internal predecessors, (328), 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 10:33:19,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:19,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-02-05 10:33:19,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:21,170 INFO L124 PetriNetUnfolderBase]: 1062/1895 cut-off events. [2024-02-05 10:33:21,171 INFO L125 PetriNetUnfolderBase]: For 7475/7475 co-relation queries the response was YES. [2024-02-05 10:33:21,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8334 conditions, 1895 events. 1062/1895 cut-off events. For 7475/7475 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 10865 event pairs, 128 based on Foata normal form. 3/1897 useless extension candidates. Maximal degree in co-relation 8287. Up to 730 conditions per place. [2024-02-05 10:33:21,182 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 166 selfloop transitions, 122 changer transitions 40/331 dead transitions. [2024-02-05 10:33:21,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 331 transitions, 3280 flow [2024-02-05 10:33:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-02-05 10:33:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-02-05 10:33:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 650 transitions. [2024-02-05 10:33:21,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487987987987988 [2024-02-05 10:33:21,185 INFO L175 Difference]: Start difference. First operand has 96 places, 112 transitions, 1364 flow. Second operand 36 states and 650 transitions. [2024-02-05 10:33:21,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 331 transitions, 3280 flow [2024-02-05 10:33:21,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 331 transitions, 3230 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-02-05 10:33:21,207 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 2365 flow [2024-02-05 10:33:21,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2365, PETRI_PLACES=141, PETRI_TRANSITIONS=165} [2024-02-05 10:33:21,208 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 102 predicate places. [2024-02-05 10:33:21,208 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 2365 flow [2024-02-05 10:33:21,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.12) internal successors, (328), 25 states have internal predecessors, (328), 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 10:33:21,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:21,209 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] [2024-02-05 10:33:21,223 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 10:33:21,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:21,420 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:21,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1898364844, now seen corresponding path program 2 times [2024-02-05 10:33:21,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:21,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200768596] [2024-02-05 10:33:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:21,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:21,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:21,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200768596] [2024-02-05 10:33:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200768596] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:21,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117709442] [2024-02-05 10:33:21,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:33:21,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:22,001 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 10:33:22,025 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 10:33:22,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:33:22,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:22,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:33:22,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:22,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117709442] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:22,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:22,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-02-05 10:33:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122063712] [2024-02-05 10:33:22,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:22,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-05 10:33:22,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-05 10:33:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2024-02-05 10:33:23,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:33:23,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 165 transitions, 2365 flow. Second operand has 25 states, 25 states have (on average 14.04) internal successors, (351), 25 states have internal predecessors, (351), 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 10:33:23,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:23,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:33:23,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:27,032 INFO L124 PetriNetUnfolderBase]: 1379/2489 cut-off events. [2024-02-05 10:33:27,032 INFO L125 PetriNetUnfolderBase]: For 16105/16105 co-relation queries the response was YES. [2024-02-05 10:33:27,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13351 conditions, 2489 events. 1379/2489 cut-off events. For 16105/16105 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15450 event pairs, 114 based on Foata normal form. 3/2491 useless extension candidates. Maximal degree in co-relation 13288. Up to 759 conditions per place. [2024-02-05 10:33:27,089 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 197 selfloop transitions, 230 changer transitions 32/462 dead transitions. [2024-02-05 10:33:27,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 462 transitions, 5764 flow [2024-02-05 10:33:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-02-05 10:33:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-02-05 10:33:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 896 transitions. [2024-02-05 10:33:27,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2024-02-05 10:33:27,095 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 2365 flow. Second operand 48 states and 896 transitions. [2024-02-05 10:33:27,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 462 transitions, 5764 flow [2024-02-05 10:33:27,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 462 transitions, 5578 flow, removed 61 selfloop flow, removed 15 redundant places. [2024-02-05 10:33:27,154 INFO L231 Difference]: Finished difference. Result has 188 places, 278 transitions, 4737 flow [2024-02-05 10:33:27,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2243, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4737, PETRI_PLACES=188, PETRI_TRANSITIONS=278} [2024-02-05 10:33:27,155 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 149 predicate places. [2024-02-05 10:33:27,155 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 278 transitions, 4737 flow [2024-02-05 10:33:27,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 14.04) internal successors, (351), 25 states have internal predecessors, (351), 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 10:33:27,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:27,156 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] [2024-02-05 10:33:27,167 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 10:33:27,366 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,SelfDestructingSolverStorable14 [2024-02-05 10:33:27,367 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:27,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash 409334700, now seen corresponding path program 3 times [2024-02-05 10:33:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426860984] [2024-02-05 10:33:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:27,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:27,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426860984] [2024-02-05 10:33:27,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426860984] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:27,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38369229] [2024-02-05 10:33:27,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:33:27,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:27,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:27,936 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 10:33:27,989 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 10:33:28,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-05 10:33:28,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:28,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:33:28,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:28,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:28,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:28,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38369229] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:28,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:28,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-02-05 10:33:28,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433988134] [2024-02-05 10:33:28,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:28,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-05 10:33:28,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:28,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-05 10:33:28,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2024-02-05 10:33:29,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:33:29,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 278 transitions, 4737 flow. Second operand has 25 states, 25 states have (on average 14.12) internal successors, (353), 25 states have internal predecessors, (353), 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 10:33:29,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:29,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:33:29,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:33,394 INFO L124 PetriNetUnfolderBase]: 1436/2571 cut-off events. [2024-02-05 10:33:33,394 INFO L125 PetriNetUnfolderBase]: For 25991/25991 co-relation queries the response was YES. [2024-02-05 10:33:33,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16385 conditions, 2571 events. 1436/2571 cut-off events. For 25991/25991 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15818 event pairs, 108 based on Foata normal form. 3/2573 useless extension candidates. Maximal degree in co-relation 16309. Up to 874 conditions per place. [2024-02-05 10:33:33,453 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 207 selfloop transitions, 258 changer transitions 21/489 dead transitions. [2024-02-05 10:33:33,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 489 transitions, 7158 flow [2024-02-05 10:33:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-02-05 10:33:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-02-05 10:33:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 910 transitions. [2024-02-05 10:33:33,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019305019305019 [2024-02-05 10:33:33,458 INFO L175 Difference]: Start difference. First operand has 188 places, 278 transitions, 4737 flow. Second operand 49 states and 910 transitions. [2024-02-05 10:33:33,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 489 transitions, 7158 flow [2024-02-05 10:33:33,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 489 transitions, 6730 flow, removed 163 selfloop flow, removed 14 redundant places. [2024-02-05 10:33:33,653 INFO L231 Difference]: Finished difference. Result has 224 places, 313 transitions, 5739 flow [2024-02-05 10:33:33,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5739, PETRI_PLACES=224, PETRI_TRANSITIONS=313} [2024-02-05 10:33:33,654 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 185 predicate places. [2024-02-05 10:33:33,655 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 313 transitions, 5739 flow [2024-02-05 10:33:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 14.12) internal successors, (353), 25 states have internal predecessors, (353), 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 10:33:33,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:33,655 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] [2024-02-05 10:33:33,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-05 10:33:33,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-05 10:33:33,869 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:33,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:33,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1070504100, now seen corresponding path program 4 times [2024-02-05 10:33:33,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:33,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442868793] [2024-02-05 10:33:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:33,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:34,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:34,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442868793] [2024-02-05 10:33:34,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442868793] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:34,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729251005] [2024-02-05 10:33:34,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:33:34,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:34,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:34,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:33:34,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-05 10:33:34,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:33:34,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:34,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-05 10:33:34,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:34,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:35,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729251005] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:35,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:35,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2024-02-05 10:33:35,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075083555] [2024-02-05 10:33:35,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:35,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:33:35,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:33:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:33:36,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:33:36,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 313 transitions, 5739 flow. Second operand has 24 states, 24 states have (on average 14.208333333333334) internal successors, (341), 24 states have internal predecessors, (341), 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 10:33:36,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:33:36,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:33:36,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:33:38,684 INFO L124 PetriNetUnfolderBase]: 1420/2547 cut-off events. [2024-02-05 10:33:38,685 INFO L125 PetriNetUnfolderBase]: For 29649/29649 co-relation queries the response was YES. [2024-02-05 10:33:38,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17330 conditions, 2547 events. 1420/2547 cut-off events. For 29649/29649 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 15639 event pairs, 150 based on Foata normal form. 3/2549 useless extension candidates. Maximal degree in co-relation 17249. Up to 1302 conditions per place. [2024-02-05 10:33:38,704 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 171 selfloop transitions, 246 changer transitions 15/435 dead transitions. [2024-02-05 10:33:38,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 435 transitions, 7137 flow [2024-02-05 10:33:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-05 10:33:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-05 10:33:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 639 transitions. [2024-02-05 10:33:38,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934362934362934 [2024-02-05 10:33:38,707 INFO L175 Difference]: Start difference. First operand has 224 places, 313 transitions, 5739 flow. Second operand 35 states and 639 transitions. [2024-02-05 10:33:38,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 435 transitions, 7137 flow [2024-02-05 10:33:38,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 435 transitions, 6819 flow, removed 71 selfloop flow, removed 25 redundant places. [2024-02-05 10:33:38,876 INFO L231 Difference]: Finished difference. Result has 236 places, 317 transitions, 6264 flow [2024-02-05 10:33:38,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=5426, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6264, PETRI_PLACES=236, PETRI_TRANSITIONS=317} [2024-02-05 10:33:38,877 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 197 predicate places. [2024-02-05 10:33:38,877 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 317 transitions, 6264 flow [2024-02-05 10:33:38,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.208333333333334) internal successors, (341), 24 states have internal predecessors, (341), 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 10:33:38,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:33:38,878 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] [2024-02-05 10:33:38,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-05 10:33:39,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-05 10:33:39,090 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:33:39,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:33:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash -622205356, now seen corresponding path program 4 times [2024-02-05 10:33:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:33:39,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470535192] [2024-02-05 10:33:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:33:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:33:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:33:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:39,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:33:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470535192] [2024-02-05 10:33:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470535192] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:33:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775988438] [2024-02-05 10:33:39,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:33:39,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:33:39,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:33:39,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:33:39,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-05 10:33:39,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:33:39,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:33:39,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-05 10:33:39,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:33:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:39,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:33:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:33:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775988438] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:33:43,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:33:43,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2024-02-05 10:33:43,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81077964] [2024-02-05 10:33:43,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:33:43,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-05 10:33:43,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:33:43,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-05 10:33:43,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=205, Unknown=1, NotChecked=0, Total=272 [2024-02-05 10:33:47,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-02-05 10:33:51,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-02-05 10:33:55,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-02-05 10:34:00,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-02-05 10:34:00,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-02-05 10:34:00,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 317 transitions, 6264 flow. Second operand has 17 states, 17 states have (on average 13.529411764705882) internal successors, (230), 17 states have internal predecessors, (230), 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 10:34:00,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:00,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-02-05 10:34:00,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:01,175 INFO L124 PetriNetUnfolderBase]: 1307/2401 cut-off events. [2024-02-05 10:34:01,175 INFO L125 PetriNetUnfolderBase]: For 33952/33986 co-relation queries the response was YES. [2024-02-05 10:34:01,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17637 conditions, 2401 events. 1307/2401 cut-off events. For 33952/33986 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14949 event pairs, 182 based on Foata normal form. 37/2423 useless extension candidates. Maximal degree in co-relation 17559. Up to 1147 conditions per place. [2024-02-05 10:34:01,204 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 162 selfloop transitions, 147 changer transitions 37/388 dead transitions. [2024-02-05 10:34:01,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 388 transitions, 7418 flow [2024-02-05 10:34:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-05 10:34:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-05 10:34:01,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 252 transitions. [2024-02-05 10:34:01,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-02-05 10:34:01,210 INFO L175 Difference]: Start difference. First operand has 236 places, 317 transitions, 6264 flow. Second operand 14 states and 252 transitions. [2024-02-05 10:34:01,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 388 transitions, 7418 flow [2024-02-05 10:34:01,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 388 transitions, 7299 flow, removed 3 selfloop flow, removed 29 redundant places. [2024-02-05 10:34:01,351 INFO L231 Difference]: Finished difference. Result has 222 places, 313 transitions, 6398 flow [2024-02-05 10:34:01,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6398, PETRI_PLACES=222, PETRI_TRANSITIONS=313} [2024-02-05 10:34:01,352 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 183 predicate places. [2024-02-05 10:34:01,352 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 313 transitions, 6398 flow [2024-02-05 10:34:01,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.529411764705882) internal successors, (230), 17 states have internal predecessors, (230), 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 10:34:01,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:34:01,352 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] [2024-02-05 10:34:01,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-05 10:34:01,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-05 10:34:01,563 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:34:01,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:34:01,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1349797334, now seen corresponding path program 5 times [2024-02-05 10:34:01,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:34:01,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152428778] [2024-02-05 10:34:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:34:01,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:34:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:02,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:34:02,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152428778] [2024-02-05 10:34:02,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152428778] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:34:02,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595248398] [2024-02-05 10:34:02,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:34:02,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:02,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:34:02,133 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:34:02,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-05 10:34:02,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-05 10:34:02,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:34:02,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:34:02,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:34:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:02,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:34:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:03,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595248398] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:34:03,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:34:03,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:34:03,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397900783] [2024-02-05 10:34:03,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:34:03,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:34:03,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:34:03,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:34:03,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:34:04,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:34:04,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 313 transitions, 6398 flow. Second operand has 23 states, 23 states have (on average 14.217391304347826) internal successors, (327), 23 states have internal predecessors, (327), 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 10:34:04,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:04,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:34:04,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:09,085 INFO L124 PetriNetUnfolderBase]: 1820/3261 cut-off events. [2024-02-05 10:34:09,086 INFO L125 PetriNetUnfolderBase]: For 48084/48084 co-relation queries the response was YES. [2024-02-05 10:34:09,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24671 conditions, 3261 events. 1820/3261 cut-off events. For 48084/48084 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20785 event pairs, 185 based on Foata normal form. 2/3262 useless extension candidates. Maximal degree in co-relation 24593. Up to 1495 conditions per place. [2024-02-05 10:34:09,146 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 208 selfloop transitions, 354 changer transitions 15/580 dead transitions. [2024-02-05 10:34:09,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 580 transitions, 11288 flow [2024-02-05 10:34:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-05 10:34:09,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-05 10:34:09,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 690 transitions. [2024-02-05 10:34:09,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504017531044558 [2024-02-05 10:34:09,153 INFO L175 Difference]: Start difference. First operand has 222 places, 313 transitions, 6398 flow. Second operand 37 states and 690 transitions. [2024-02-05 10:34:09,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 580 transitions, 11288 flow [2024-02-05 10:34:09,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 580 transitions, 11102 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-02-05 10:34:09,417 INFO L231 Difference]: Finished difference. Result has 260 places, 451 transitions, 10596 flow [2024-02-05 10:34:09,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6271, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10596, PETRI_PLACES=260, PETRI_TRANSITIONS=451} [2024-02-05 10:34:09,417 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 221 predicate places. [2024-02-05 10:34:09,417 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 451 transitions, 10596 flow [2024-02-05 10:34:09,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.217391304347826) internal successors, (327), 23 states have internal predecessors, (327), 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 10:34:09,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:34:09,418 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] [2024-02-05 10:34:09,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-05 10:34:09,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:09,629 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:34:09,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:34:09,630 INFO L85 PathProgramCache]: Analyzing trace with hash 226552458, now seen corresponding path program 6 times [2024-02-05 10:34:09,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:34:09,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968377469] [2024-02-05 10:34:09,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:34:09,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:34:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:10,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:34:10,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968377469] [2024-02-05 10:34:10,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968377469] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:34:10,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408917018] [2024-02-05 10:34:10,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:34:10,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:10,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:34:10,120 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:34:10,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-05 10:34:10,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-05 10:34:10,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:34:10,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-05 10:34:10,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:34:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:10,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:34:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:11,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408917018] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:34:11,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:34:11,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-02-05 10:34:11,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904550471] [2024-02-05 10:34:11,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:34:11,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:34:11,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:34:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:34:11,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:34:12,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:34:12,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 451 transitions, 10596 flow. Second operand has 22 states, 22 states have (on average 14.318181818181818) internal successors, (315), 22 states have internal predecessors, (315), 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 10:34:12,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:12,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:34:12,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:15,088 INFO L124 PetriNetUnfolderBase]: 1935/3466 cut-off events. [2024-02-05 10:34:15,089 INFO L125 PetriNetUnfolderBase]: For 60562/60562 co-relation queries the response was YES. [2024-02-05 10:34:15,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28900 conditions, 3466 events. 1935/3466 cut-off events. For 60562/60562 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 22253 event pairs, 247 based on Foata normal form. 2/3465 useless extension candidates. Maximal degree in co-relation 28806. Up to 2219 conditions per place. [2024-02-05 10:34:15,122 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 212 selfloop transitions, 344 changer transitions 14/573 dead transitions. [2024-02-05 10:34:15,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 573 transitions, 13119 flow [2024-02-05 10:34:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-02-05 10:34:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-02-05 10:34:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 473 transitions. [2024-02-05 10:34:15,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47347347347347346 [2024-02-05 10:34:15,138 INFO L175 Difference]: Start difference. First operand has 260 places, 451 transitions, 10596 flow. Second operand 27 states and 473 transitions. [2024-02-05 10:34:15,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 573 transitions, 13119 flow [2024-02-05 10:34:15,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 573 transitions, 12703 flow, removed 185 selfloop flow, removed 6 redundant places. [2024-02-05 10:34:15,565 INFO L231 Difference]: Finished difference. Result has 290 places, 504 transitions, 12607 flow [2024-02-05 10:34:15,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10242, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12607, PETRI_PLACES=290, PETRI_TRANSITIONS=504} [2024-02-05 10:34:15,566 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 251 predicate places. [2024-02-05 10:34:15,566 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 504 transitions, 12607 flow [2024-02-05 10:34:15,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.318181818181818) internal successors, (315), 22 states have internal predecessors, (315), 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 10:34:15,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:34:15,566 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] [2024-02-05 10:34:15,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-05 10:34:15,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-02-05 10:34:15,778 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:34:15,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:34:15,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1942170012, now seen corresponding path program 7 times [2024-02-05 10:34:15,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:34:15,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726294190] [2024-02-05 10:34:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:34:15,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:34:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:16,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:34:16,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726294190] [2024-02-05 10:34:16,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726294190] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:34:16,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137615956] [2024-02-05 10:34:16,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:34:16,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:16,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:34:16,497 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:34:16,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-05 10:34:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:16,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:34:16,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:34:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:16,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:34:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:17,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137615956] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:34:17,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:34:17,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:34:17,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901930449] [2024-02-05 10:34:17,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:34:17,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:34:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:34:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:34:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:34:19,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:34:19,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 504 transitions, 12607 flow. Second operand has 23 states, 23 states have (on average 14.130434782608695) internal successors, (325), 23 states have internal predecessors, (325), 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 10:34:19,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:19,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:34:19,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:23,693 INFO L124 PetriNetUnfolderBase]: 2334/4207 cut-off events. [2024-02-05 10:34:23,694 INFO L125 PetriNetUnfolderBase]: For 83184/83184 co-relation queries the response was YES. [2024-02-05 10:34:23,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36958 conditions, 4207 events. 2334/4207 cut-off events. For 83184/83184 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 28256 event pairs, 259 based on Foata normal form. 2/4208 useless extension candidates. Maximal degree in co-relation 36854. Up to 1999 conditions per place. [2024-02-05 10:34:23,741 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 251 selfloop transitions, 466 changer transitions 15/735 dead transitions. [2024-02-05 10:34:23,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 735 transitions, 17565 flow [2024-02-05 10:34:23,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-05 10:34:23,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-05 10:34:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 662 transitions. [2024-02-05 10:34:23,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111969111969112 [2024-02-05 10:34:23,743 INFO L175 Difference]: Start difference. First operand has 290 places, 504 transitions, 12607 flow. Second operand 35 states and 662 transitions. [2024-02-05 10:34:23,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 735 transitions, 17565 flow [2024-02-05 10:34:24,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 735 transitions, 17278 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-02-05 10:34:24,421 INFO L231 Difference]: Finished difference. Result has 331 places, 602 transitions, 16825 flow [2024-02-05 10:34:24,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12388, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16825, PETRI_PLACES=331, PETRI_TRANSITIONS=602} [2024-02-05 10:34:24,421 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 292 predicate places. [2024-02-05 10:34:24,422 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 602 transitions, 16825 flow [2024-02-05 10:34:24,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.130434782608695) internal successors, (325), 23 states have internal predecessors, (325), 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 10:34:24,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:34:24,422 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] [2024-02-05 10:34:24,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-02-05 10:34:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:24,634 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:34:24,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:34:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash -486464726, now seen corresponding path program 8 times [2024-02-05 10:34:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:34:24,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102959212] [2024-02-05 10:34:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:34:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:34:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:25,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:34:25,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102959212] [2024-02-05 10:34:25,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102959212] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:34:25,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887540132] [2024-02-05 10:34:25,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:34:25,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:25,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:34:25,192 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:34:25,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-05 10:34:25,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:34:25,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:34:25,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:34:25,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:34:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:25,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:34:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:26,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887540132] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:34:26,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:34:26,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:34:26,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974665428] [2024-02-05 10:34:26,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:34:26,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:34:26,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:34:26,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:34:26,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:34:27,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:34:27,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 602 transitions, 16825 flow. Second operand has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 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 10:34:27,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:27,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:34:27,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:31,550 INFO L124 PetriNetUnfolderBase]: 2742/4978 cut-off events. [2024-02-05 10:34:31,550 INFO L125 PetriNetUnfolderBase]: For 137743/137743 co-relation queries the response was YES. [2024-02-05 10:34:31,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48171 conditions, 4978 events. 2742/4978 cut-off events. For 137743/137743 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35012 event pairs, 313 based on Foata normal form. 2/4979 useless extension candidates. Maximal degree in co-relation 48051. Up to 2576 conditions per place. [2024-02-05 10:34:31,603 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 288 selfloop transitions, 520 changer transitions 16/827 dead transitions. [2024-02-05 10:34:31,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 827 transitions, 22590 flow [2024-02-05 10:34:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-02-05 10:34:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-02-05 10:34:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 669 transitions. [2024-02-05 10:34:31,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48867786705624544 [2024-02-05 10:34:31,606 INFO L175 Difference]: Start difference. First operand has 331 places, 602 transitions, 16825 flow. Second operand 37 states and 669 transitions. [2024-02-05 10:34:31,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 827 transitions, 22590 flow [2024-02-05 10:34:32,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 827 transitions, 22372 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-02-05 10:34:32,777 INFO L231 Difference]: Finished difference. Result has 374 places, 716 transitions, 22014 flow [2024-02-05 10:34:32,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=16643, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=22014, PETRI_PLACES=374, PETRI_TRANSITIONS=716} [2024-02-05 10:34:32,778 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 335 predicate places. [2024-02-05 10:34:32,778 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 716 transitions, 22014 flow [2024-02-05 10:34:32,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 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 10:34:32,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:34:32,779 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] [2024-02-05 10:34:32,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-05 10:34:32,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:32,988 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:34:32,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:34:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1933695804, now seen corresponding path program 9 times [2024-02-05 10:34:32,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:34:32,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031262806] [2024-02-05 10:34:32,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:34:32,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:34:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:33,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:34:33,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031262806] [2024-02-05 10:34:33,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031262806] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:34:33,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927835230] [2024-02-05 10:34:33,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:34:33,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:33,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:34:33,668 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:34:33,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-05 10:34:33,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-05 10:34:33,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:34:33,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:34:33,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:34:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:34,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:34:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:35,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927835230] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:34:35,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:34:35,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:34:35,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987527117] [2024-02-05 10:34:35,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:34:35,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:34:35,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:34:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:34:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:34:36,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:34:36,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 716 transitions, 22014 flow. Second operand has 24 states, 24 states have (on average 14.041666666666666) internal successors, (337), 24 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:34:36,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:36,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:34:36,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:42,264 INFO L124 PetriNetUnfolderBase]: 3036/5533 cut-off events. [2024-02-05 10:34:42,264 INFO L125 PetriNetUnfolderBase]: For 188940/188940 co-relation queries the response was YES. [2024-02-05 10:34:42,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58543 conditions, 5533 events. 3036/5533 cut-off events. For 188940/188940 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 40006 event pairs, 303 based on Foata normal form. 2/5534 useless extension candidates. Maximal degree in co-relation 58409. Up to 2653 conditions per place. [2024-02-05 10:34:42,325 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 300 selfloop transitions, 618 changer transitions 14/935 dead transitions. [2024-02-05 10:34:42,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 935 transitions, 27666 flow [2024-02-05 10:34:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-02-05 10:34:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-02-05 10:34:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 754 transitions. [2024-02-05 10:34:42,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094594594594595 [2024-02-05 10:34:42,328 INFO L175 Difference]: Start difference. First operand has 374 places, 716 transitions, 22014 flow. Second operand 40 states and 754 transitions. [2024-02-05 10:34:42,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 935 transitions, 27666 flow [2024-02-05 10:34:44,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 935 transitions, 27216 flow, removed 173 selfloop flow, removed 12 redundant places. [2024-02-05 10:34:44,238 INFO L231 Difference]: Finished difference. Result has 411 places, 796 transitions, 26440 flow [2024-02-05 10:34:44,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=21656, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=540, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=26440, PETRI_PLACES=411, PETRI_TRANSITIONS=796} [2024-02-05 10:34:44,239 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 372 predicate places. [2024-02-05 10:34:44,239 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 796 transitions, 26440 flow [2024-02-05 10:34:44,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.041666666666666) internal successors, (337), 24 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:34:44,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:34:44,240 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] [2024-02-05 10:34:44,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-05 10:34:44,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-02-05 10:34:44,451 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:34:44,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:34:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1331329738, now seen corresponding path program 10 times [2024-02-05 10:34:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:34:44,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787725492] [2024-02-05 10:34:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:34:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:34:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:45,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:34:45,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787725492] [2024-02-05 10:34:45,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787725492] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:34:45,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787808204] [2024-02-05 10:34:45,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:34:45,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:45,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:34:45,002 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:34:45,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-05 10:34:45,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:34:45,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:34:45,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-05 10:34:45,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:34:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:45,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:34:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:46,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787808204] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:34:46,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:34:46,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-02-05 10:34:46,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063913269] [2024-02-05 10:34:46,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:34:46,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:34:46,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:34:46,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:34:46,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:34:48,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:34:48,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 796 transitions, 26440 flow. Second operand has 22 states, 22 states have (on average 14.181818181818182) internal successors, (312), 22 states have internal predecessors, (312), 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 10:34:48,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:48,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:34:48,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:34:51,739 INFO L124 PetriNetUnfolderBase]: 3030/5522 cut-off events. [2024-02-05 10:34:51,739 INFO L125 PetriNetUnfolderBase]: For 219590/219590 co-relation queries the response was YES. [2024-02-05 10:34:51,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62089 conditions, 5522 events. 3030/5522 cut-off events. For 219590/219590 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39806 event pairs, 391 based on Foata normal form. 3/5524 useless extension candidates. Maximal degree in co-relation 61946. Up to 3639 conditions per place. [2024-02-05 10:34:51,812 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 312 selfloop transitions, 530 changer transitions 14/859 dead transitions. [2024-02-05 10:34:51,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 859 transitions, 28559 flow [2024-02-05 10:34:51,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-05 10:34:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-05 10:34:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 427 transitions. [2024-02-05 10:34:51,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48085585585585583 [2024-02-05 10:34:51,814 INFO L175 Difference]: Start difference. First operand has 411 places, 796 transitions, 26440 flow. Second operand 24 states and 427 transitions. [2024-02-05 10:34:51,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 859 transitions, 28559 flow [2024-02-05 10:34:53,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 859 transitions, 28191 flow, removed 133 selfloop flow, removed 12 redundant places. [2024-02-05 10:34:53,925 INFO L231 Difference]: Finished difference. Result has 426 places, 799 transitions, 27952 flow [2024-02-05 10:34:53,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=26072, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=27952, PETRI_PLACES=426, PETRI_TRANSITIONS=799} [2024-02-05 10:34:53,926 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 387 predicate places. [2024-02-05 10:34:53,926 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 799 transitions, 27952 flow [2024-02-05 10:34:53,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.181818181818182) internal successors, (312), 22 states have internal predecessors, (312), 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 10:34:53,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:34:53,927 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] [2024-02-05 10:34:53,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-05 10:34:54,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:54,139 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:34:54,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:34:54,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1235353002, now seen corresponding path program 11 times [2024-02-05 10:34:54,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:34:54,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396498699] [2024-02-05 10:34:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:34:54,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:34:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:34:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:54,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:34:54,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396498699] [2024-02-05 10:34:54,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396498699] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:34:54,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908151899] [2024-02-05 10:34:54,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:34:54,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:34:54,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:34:54,686 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:34:54,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-05 10:34:54,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:34:54,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:34:54,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:34:54,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:34:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:55,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:34:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:34:55,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908151899] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:34:55,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:34:55,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:34:55,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891394938] [2024-02-05 10:34:55,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:34:55,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:34:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:34:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:34:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:34:56,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:34:56,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 799 transitions, 27952 flow. Second operand has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 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 10:34:56,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:34:56,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:34:56,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:00,790 INFO L124 PetriNetUnfolderBase]: 3126/5701 cut-off events. [2024-02-05 10:35:00,791 INFO L125 PetriNetUnfolderBase]: For 252899/252899 co-relation queries the response was YES. [2024-02-05 10:35:00,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67448 conditions, 5701 events. 3126/5701 cut-off events. For 252899/252899 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 41439 event pairs, 335 based on Foata normal form. 5/5705 useless extension candidates. Maximal degree in co-relation 67302. Up to 3402 conditions per place. [2024-02-05 10:35:00,871 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 322 selfloop transitions, 560 changer transitions 14/899 dead transitions. [2024-02-05 10:35:00,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 899 transitions, 30852 flow [2024-02-05 10:35:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-05 10:35:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-05 10:35:00,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 520 transitions. [2024-02-05 10:35:00,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019305019305019 [2024-02-05 10:35:00,877 INFO L175 Difference]: Start difference. First operand has 426 places, 799 transitions, 27952 flow. Second operand 28 states and 520 transitions. [2024-02-05 10:35:00,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 899 transitions, 30852 flow [2024-02-05 10:35:03,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 899 transitions, 30774 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-02-05 10:35:03,540 INFO L231 Difference]: Finished difference. Result has 444 places, 812 transitions, 30295 flow [2024-02-05 10:35:03,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=27874, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=547, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30295, PETRI_PLACES=444, PETRI_TRANSITIONS=812} [2024-02-05 10:35:03,541 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 405 predicate places. [2024-02-05 10:35:03,541 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 812 transitions, 30295 flow [2024-02-05 10:35:03,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 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 10:35:03,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:03,542 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] [2024-02-05 10:35:03,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-02-05 10:35:03,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:03,754 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:35:03,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:03,754 INFO L85 PathProgramCache]: Analyzing trace with hash 134148272, now seen corresponding path program 12 times [2024-02-05 10:35:03,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:03,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020040139] [2024-02-05 10:35:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:03,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:04,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020040139] [2024-02-05 10:35:04,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020040139] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:04,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650275107] [2024-02-05 10:35:04,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:35:04,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:04,464 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:35:04,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-05 10:35:04,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-05 10:35:04,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:04,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:35:04,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:04,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:05,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650275107] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:05,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:05,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:35:05,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076013718] [2024-02-05 10:35:05,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:05,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:35:05,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:05,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:35:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:35:06,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:35:06,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 812 transitions, 30295 flow. Second operand has 23 states, 23 states have (on average 14.130434782608695) internal successors, (325), 23 states have internal predecessors, (325), 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 10:35:06,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:06,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:35:06,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:12,236 INFO L124 PetriNetUnfolderBase]: 3183/5812 cut-off events. [2024-02-05 10:35:12,237 INFO L125 PetriNetUnfolderBase]: For 313879/313879 co-relation queries the response was YES. [2024-02-05 10:35:12,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72455 conditions, 5812 events. 3183/5812 cut-off events. For 313879/313879 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42279 event pairs, 353 based on Foata normal form. 5/5816 useless extension candidates. Maximal degree in co-relation 72303. Up to 3059 conditions per place. [2024-02-05 10:35:12,323 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 293 selfloop transitions, 636 changer transitions 17/949 dead transitions. [2024-02-05 10:35:12,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 949 transitions, 33868 flow [2024-02-05 10:35:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-02-05 10:35:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-02-05 10:35:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 719 transitions. [2024-02-05 10:35:12,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858108108108108 [2024-02-05 10:35:12,326 INFO L175 Difference]: Start difference. First operand has 444 places, 812 transitions, 30295 flow. Second operand 40 states and 719 transitions. [2024-02-05 10:35:12,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 949 transitions, 33868 flow [2024-02-05 10:35:15,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 949 transitions, 33705 flow, removed 33 selfloop flow, removed 15 redundant places. [2024-02-05 10:35:15,145 INFO L231 Difference]: Finished difference. Result has 473 places, 834 transitions, 33055 flow [2024-02-05 10:35:15,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=30145, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=33055, PETRI_PLACES=473, PETRI_TRANSITIONS=834} [2024-02-05 10:35:15,147 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 434 predicate places. [2024-02-05 10:35:15,147 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 834 transitions, 33055 flow [2024-02-05 10:35:15,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.130434782608695) internal successors, (325), 23 states have internal predecessors, (325), 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 10:35:15,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:15,147 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] [2024-02-05 10:35:15,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-02-05 10:35:15,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:15,359 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:35:15,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:15,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1117688492, now seen corresponding path program 13 times [2024-02-05 10:35:15,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:15,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58401214] [2024-02-05 10:35:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:15,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:15,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:15,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58401214] [2024-02-05 10:35:15,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58401214] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:15,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725202681] [2024-02-05 10:35:15,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:35:15,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:15,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:15,921 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:35:15,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-05 10:35:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:16,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:35:16,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:16,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:17,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725202681] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:17,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:35:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880478275] [2024-02-05 10:35:17,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:17,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:35:17,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:17,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:35:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:35:18,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:35:18,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 834 transitions, 33055 flow. Second operand has 24 states, 24 states have (on average 14.125) internal successors, (339), 24 states have internal predecessors, (339), 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 10:35:18,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:18,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:35:18,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:22,848 INFO L124 PetriNetUnfolderBase]: 3141/5711 cut-off events. [2024-02-05 10:35:22,848 INFO L125 PetriNetUnfolderBase]: For 329243/329243 co-relation queries the response was YES. [2024-02-05 10:35:22,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75645 conditions, 5711 events. 3141/5711 cut-off events. For 329243/329243 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 41298 event pairs, 321 based on Foata normal form. 4/5714 useless extension candidates. Maximal degree in co-relation 75488. Up to 3382 conditions per place. [2024-02-05 10:35:22,924 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 342 selfloop transitions, 585 changer transitions 12/942 dead transitions. [2024-02-05 10:35:22,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 942 transitions, 35502 flow [2024-02-05 10:35:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-05 10:35:22,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-05 10:35:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 619 transitions. [2024-02-05 10:35:22,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506961506961507 [2024-02-05 10:35:22,941 INFO L175 Difference]: Start difference. First operand has 473 places, 834 transitions, 33055 flow. Second operand 33 states and 619 transitions. [2024-02-05 10:35:22,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 942 transitions, 35502 flow [2024-02-05 10:35:26,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 942 transitions, 35235 flow, removed 59 selfloop flow, removed 23 redundant places. [2024-02-05 10:35:26,254 INFO L231 Difference]: Finished difference. Result has 484 places, 836 transitions, 34749 flow [2024-02-05 10:35:26,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=32792, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=34749, PETRI_PLACES=484, PETRI_TRANSITIONS=836} [2024-02-05 10:35:26,259 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 445 predicate places. [2024-02-05 10:35:26,259 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 836 transitions, 34749 flow [2024-02-05 10:35:26,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.125) internal successors, (339), 24 states have internal predecessors, (339), 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 10:35:26,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:26,259 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] [2024-02-05 10:35:26,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-02-05 10:35:26,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-02-05 10:35:26,471 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:35:26,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash -850530640, now seen corresponding path program 14 times [2024-02-05 10:35:26,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:26,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276467495] [2024-02-05 10:35:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:26,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:27,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:27,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276467495] [2024-02-05 10:35:27,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276467495] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:27,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797883940] [2024-02-05 10:35:27,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:35:27,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:27,076 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:35:27,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-05 10:35:27,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:35:27,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:27,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:35:27,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:27,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:27,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:28,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797883940] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:28,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:28,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:35:28,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048863005] [2024-02-05 10:35:28,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:28,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:35:28,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:28,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:35:28,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:35:29,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:35:29,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 836 transitions, 34749 flow. Second operand has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 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 10:35:29,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:29,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:35:29,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:34,658 INFO L124 PetriNetUnfolderBase]: 3181/5761 cut-off events. [2024-02-05 10:35:34,658 INFO L125 PetriNetUnfolderBase]: For 378529/378529 co-relation queries the response was YES. [2024-02-05 10:35:34,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80147 conditions, 5761 events. 3181/5761 cut-off events. For 378529/378529 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 41505 event pairs, 293 based on Foata normal form. 5/5765 useless extension candidates. Maximal degree in co-relation 79989. Up to 2707 conditions per place. [2024-02-05 10:35:34,733 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 320 selfloop transitions, 624 changer transitions 17/964 dead transitions. [2024-02-05 10:35:34,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 964 transitions, 38181 flow [2024-02-05 10:35:34,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-05 10:35:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-05 10:35:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 659 transitions. [2024-02-05 10:35:34,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088803088803089 [2024-02-05 10:35:34,736 INFO L175 Difference]: Start difference. First operand has 484 places, 836 transitions, 34749 flow. Second operand 35 states and 659 transitions. [2024-02-05 10:35:34,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 964 transitions, 38181 flow [2024-02-05 10:35:38,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 964 transitions, 37994 flow, removed 7 selfloop flow, removed 26 redundant places. [2024-02-05 10:35:38,563 INFO L231 Difference]: Finished difference. Result has 496 places, 855 transitions, 37127 flow [2024-02-05 10:35:38,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=34566, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=37127, PETRI_PLACES=496, PETRI_TRANSITIONS=855} [2024-02-05 10:35:38,568 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 457 predicate places. [2024-02-05 10:35:38,569 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 855 transitions, 37127 flow [2024-02-05 10:35:38,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 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 10:35:38,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:38,569 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] [2024-02-05 10:35:38,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-02-05 10:35:38,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-02-05 10:35:38,783 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:35:38,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:38,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1011614744, now seen corresponding path program 15 times [2024-02-05 10:35:38,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:38,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100404699] [2024-02-05 10:35:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:38,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:39,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100404699] [2024-02-05 10:35:39,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100404699] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670917436] [2024-02-05 10:35:39,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:35:39,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:39,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:39,345 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:35:39,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-05 10:35:39,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-05 10:35:39,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:39,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:35:39,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:39,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670917436] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:40,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:40,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:35:40,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720569300] [2024-02-05 10:35:40,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:40,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:35:40,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:40,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:35:40,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:35:41,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:35:41,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 855 transitions, 37127 flow. Second operand has 23 states, 23 states have (on average 14.130434782608695) internal successors, (325), 23 states have internal predecessors, (325), 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 10:35:41,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:41,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:35:41,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:35:46,517 INFO L124 PetriNetUnfolderBase]: 3163/5716 cut-off events. [2024-02-05 10:35:46,517 INFO L125 PetriNetUnfolderBase]: For 379225/379225 co-relation queries the response was YES. [2024-02-05 10:35:46,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83278 conditions, 5716 events. 3163/5716 cut-off events. For 379225/379225 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40981 event pairs, 329 based on Foata normal form. 2/5717 useless extension candidates. Maximal degree in co-relation 83119. Up to 3548 conditions per place. [2024-02-05 10:35:46,609 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 312 selfloop transitions, 605 changer transitions 14/934 dead transitions. [2024-02-05 10:35:46,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 934 transitions, 39470 flow [2024-02-05 10:35:46,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-02-05 10:35:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-02-05 10:35:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 579 transitions. [2024-02-05 10:35:46,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742014742014742 [2024-02-05 10:35:46,611 INFO L175 Difference]: Start difference. First operand has 496 places, 855 transitions, 37127 flow. Second operand 33 states and 579 transitions. [2024-02-05 10:35:46,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 934 transitions, 39470 flow [2024-02-05 10:35:50,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 934 transitions, 39025 flow, removed 78 selfloop flow, removed 22 redundant places. [2024-02-05 10:35:50,990 INFO L231 Difference]: Finished difference. Result has 509 places, 859 transitions, 38956 flow [2024-02-05 10:35:50,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=36699, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38956, PETRI_PLACES=509, PETRI_TRANSITIONS=859} [2024-02-05 10:35:50,993 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 470 predicate places. [2024-02-05 10:35:50,993 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 859 transitions, 38956 flow [2024-02-05 10:35:50,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.130434782608695) internal successors, (325), 23 states have internal predecessors, (325), 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 10:35:50,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:35:50,993 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] [2024-02-05 10:35:51,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-02-05 10:35:51,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-05 10:35:51,205 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:35:51,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:35:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2115739236, now seen corresponding path program 16 times [2024-02-05 10:35:51,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:35:51,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319077098] [2024-02-05 10:35:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:35:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:35:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:35:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:52,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:35:52,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319077098] [2024-02-05 10:35:52,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319077098] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:35:52,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98349412] [2024-02-05 10:35:52,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:35:52,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:35:52,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:35:52,141 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:35:52,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-05 10:35:52,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:35:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:35:52,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:35:52,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:35:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:52,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:35:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:35:53,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98349412] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:35:53,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:35:53,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:35:53,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258669082] [2024-02-05 10:35:53,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:35:53,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:35:53,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:35:53,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:35:53,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:35:57,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:35:57,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:35:57,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 859 transitions, 38956 flow. Second operand has 23 states, 23 states have (on average 14.130434782608695) internal successors, (325), 23 states have internal predecessors, (325), 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 10:35:57,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:35:57,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:35:57,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:03,474 INFO L124 PetriNetUnfolderBase]: 3224/5824 cut-off events. [2024-02-05 10:36:03,474 INFO L125 PetriNetUnfolderBase]: For 445548/445548 co-relation queries the response was YES. [2024-02-05 10:36:03,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87406 conditions, 5824 events. 3224/5824 cut-off events. For 445548/445548 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 41795 event pairs, 315 based on Foata normal form. 4/5827 useless extension candidates. Maximal degree in co-relation 87256. Up to 2935 conditions per place. [2024-02-05 10:36:03,549 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 320 selfloop transitions, 634 changer transitions 16/973 dead transitions. [2024-02-05 10:36:03,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 973 transitions, 42123 flow [2024-02-05 10:36:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-02-05 10:36:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-02-05 10:36:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 638 transitions. [2024-02-05 10:36:03,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266409266409267 [2024-02-05 10:36:03,561 INFO L175 Difference]: Start difference. First operand has 509 places, 859 transitions, 38956 flow. Second operand 35 states and 638 transitions. [2024-02-05 10:36:03,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 973 transitions, 42123 flow [2024-02-05 10:36:07,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 973 transitions, 41953 flow, removed 11 selfloop flow, removed 21 redundant places. [2024-02-05 10:36:07,787 INFO L231 Difference]: Finished difference. Result has 526 places, 875 transitions, 41665 flow [2024-02-05 10:36:07,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=38786, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=618, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=41665, PETRI_PLACES=526, PETRI_TRANSITIONS=875} [2024-02-05 10:36:07,788 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 487 predicate places. [2024-02-05 10:36:07,788 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 875 transitions, 41665 flow [2024-02-05 10:36:07,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.130434782608695) internal successors, (325), 23 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:07,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:07,789 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] [2024-02-05 10:36:07,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-02-05 10:36:08,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:08,000 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:36:08,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1430949122, now seen corresponding path program 17 times [2024-02-05 10:36:08,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:08,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092301985] [2024-02-05 10:36:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:08,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:08,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:08,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092301985] [2024-02-05 10:36:08,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092301985] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:08,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068914998] [2024-02-05 10:36:08,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:36:08,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:08,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:08,437 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:08,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-02-05 10:36:08,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-05 10:36:08,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:08,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:36:08,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:08,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:10,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068914998] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:10,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:10,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:36:10,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070233977] [2024-02-05 10:36:10,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:10,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:36:10,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:10,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:36:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:36:11,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:36:11,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 875 transitions, 41665 flow. Second operand has 23 states, 23 states have (on average 14.217391304347826) internal successors, (327), 23 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:11,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:11,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:36:11,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:16,475 INFO L124 PetriNetUnfolderBase]: 3250/5869 cut-off events. [2024-02-05 10:36:16,475 INFO L125 PetriNetUnfolderBase]: For 500681/500681 co-relation queries the response was YES. [2024-02-05 10:36:16,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92773 conditions, 5869 events. 3250/5869 cut-off events. For 500681/500681 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 42090 event pairs, 347 based on Foata normal form. 2/5870 useless extension candidates. Maximal degree in co-relation 92609. Up to 3475 conditions per place. [2024-02-05 10:36:16,566 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 343 selfloop transitions, 606 changer transitions 14/966 dead transitions. [2024-02-05 10:36:16,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 966 transitions, 44432 flow [2024-02-05 10:36:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-05 10:36:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-05 10:36:16,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 558 transitions. [2024-02-05 10:36:16,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-02-05 10:36:16,568 INFO L175 Difference]: Start difference. First operand has 526 places, 875 transitions, 41665 flow. Second operand 31 states and 558 transitions. [2024-02-05 10:36:16,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 966 transitions, 44432 flow [2024-02-05 10:36:21,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 966 transitions, 44206 flow, removed 26 selfloop flow, removed 24 redundant places. [2024-02-05 10:36:21,173 INFO L231 Difference]: Finished difference. Result has 535 places, 881 transitions, 43699 flow [2024-02-05 10:36:21,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=41443, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43699, PETRI_PLACES=535, PETRI_TRANSITIONS=881} [2024-02-05 10:36:21,174 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 496 predicate places. [2024-02-05 10:36:21,174 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 881 transitions, 43699 flow [2024-02-05 10:36:21,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.217391304347826) internal successors, (327), 23 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:21,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:21,175 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] [2024-02-05 10:36:21,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:21,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:21,387 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:36:21,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:21,387 INFO L85 PathProgramCache]: Analyzing trace with hash -357701396, now seen corresponding path program 18 times [2024-02-05 10:36:21,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:21,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746906722] [2024-02-05 10:36:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:21,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:21,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746906722] [2024-02-05 10:36:21,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746906722] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:21,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870800974] [2024-02-05 10:36:21,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:36:21,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:21,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:21,946 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:21,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-02-05 10:36:22,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-05 10:36:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:36:22,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-05 10:36:22,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:22,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:23,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870800974] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:23,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:23,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-02-05 10:36:23,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315700819] [2024-02-05 10:36:23,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:23,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:36:23,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:36:23,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:36:26,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:26,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:36:26,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 881 transitions, 43699 flow. Second operand has 22 states, 22 states have (on average 14.227272727272727) internal successors, (313), 22 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:26,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:26,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:36:26,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:31,988 INFO L124 PetriNetUnfolderBase]: 3301/5961 cut-off events. [2024-02-05 10:36:31,988 INFO L125 PetriNetUnfolderBase]: For 578252/578252 co-relation queries the response was YES. [2024-02-05 10:36:32,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97719 conditions, 5961 events. 3301/5961 cut-off events. For 578252/578252 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 42707 event pairs, 359 based on Foata normal form. 4/5964 useless extension candidates. Maximal degree in co-relation 97551. Up to 3050 conditions per place. [2024-02-05 10:36:32,081 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 300 selfloop transitions, 649 changer transitions 16/968 dead transitions. [2024-02-05 10:36:32,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 968 transitions, 46761 flow [2024-02-05 10:36:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-02-05 10:36:32,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-02-05 10:36:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 530 transitions. [2024-02-05 10:36:32,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774774774774775 [2024-02-05 10:36:32,083 INFO L175 Difference]: Start difference. First operand has 535 places, 881 transitions, 43699 flow. Second operand 30 states and 530 transitions. [2024-02-05 10:36:32,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 968 transitions, 46761 flow [2024-02-05 10:36:38,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 968 transitions, 46638 flow, removed 4 selfloop flow, removed 19 redundant places. [2024-02-05 10:36:38,116 INFO L231 Difference]: Finished difference. Result has 549 places, 897 transitions, 46843 flow [2024-02-05 10:36:38,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=43580, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=46843, PETRI_PLACES=549, PETRI_TRANSITIONS=897} [2024-02-05 10:36:38,118 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 510 predicate places. [2024-02-05 10:36:38,118 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 897 transitions, 46843 flow [2024-02-05 10:36:38,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.227272727272727) internal successors, (313), 22 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:38,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:36:38,118 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] [2024-02-05 10:36:38,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-02-05 10:36:38,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-02-05 10:36:38,330 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:36:38,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:36:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash 715458310, now seen corresponding path program 19 times [2024-02-05 10:36:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:36:38,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828718155] [2024-02-05 10:36:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:36:38,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:36:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:38,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:36:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828718155] [2024-02-05 10:36:38,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828718155] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:36:38,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278186599] [2024-02-05 10:36:38,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:36:38,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:36:38,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:36:38,965 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:36:38,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-02-05 10:36:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:36:39,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:36:39,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:36:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:39,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:36:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:36:40,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278186599] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:36:40,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:36:40,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:36:40,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210430640] [2024-02-05 10:36:40,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:36:40,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:36:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:36:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:36:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:36:45,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:36:45,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-02-05 10:36:45,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 897 transitions, 46843 flow. Second operand has 24 states, 24 states have (on average 13.083333333333334) internal successors, (314), 24 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:36:45,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:36:45,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-02-05 10:36:45,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:36:53,396 INFO L124 PetriNetUnfolderBase]: 3691/6651 cut-off events. [2024-02-05 10:36:53,396 INFO L125 PetriNetUnfolderBase]: For 717520/717520 co-relation queries the response was YES. [2024-02-05 10:36:53,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115640 conditions, 6651 events. 3691/6651 cut-off events. For 717520/717520 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 48694 event pairs, 345 based on Foata normal form. 2/6652 useless extension candidates. Maximal degree in co-relation 115467. Up to 3262 conditions per place. [2024-02-05 10:36:53,554 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 356 selfloop transitions, 771 changer transitions 14/1144 dead transitions. [2024-02-05 10:36:53,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 1144 transitions, 56665 flow [2024-02-05 10:36:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-02-05 10:36:53,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-02-05 10:36:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 719 transitions. [2024-02-05 10:36:53,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858108108108108 [2024-02-05 10:36:53,556 INFO L175 Difference]: Start difference. First operand has 549 places, 897 transitions, 46843 flow. Second operand 40 states and 719 transitions. [2024-02-05 10:36:53,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 1144 transitions, 56665 flow [2024-02-05 10:37:00,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1144 transitions, 56412 flow, removed 47 selfloop flow, removed 21 redundant places. [2024-02-05 10:37:00,466 INFO L231 Difference]: Finished difference. Result has 580 places, 1004 transitions, 55815 flow [2024-02-05 10:37:00,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=46651, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=55815, PETRI_PLACES=580, PETRI_TRANSITIONS=1004} [2024-02-05 10:37:00,468 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 541 predicate places. [2024-02-05 10:37:00,468 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1004 transitions, 55815 flow [2024-02-05 10:37:00,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.083333333333334) internal successors, (314), 24 states have internal predecessors, (314), 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 10:37:00,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:00,469 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] [2024-02-05 10:37:00,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-02-05 10:37:00,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-02-05 10:37:00,685 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:37:00,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:00,686 INFO L85 PathProgramCache]: Analyzing trace with hash 442008450, now seen corresponding path program 20 times [2024-02-05 10:37:00,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:00,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849632341] [2024-02-05 10:37:00,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:00,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:01,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849632341] [2024-02-05 10:37:01,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849632341] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762240685] [2024-02-05 10:37:01,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:37:01,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:01,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:01,223 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:01,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-02-05 10:37:01,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:37:01,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:01,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:37:01,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:01,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:02,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762240685] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:02,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:02,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:37:02,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979611694] [2024-02-05 10:37:02,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:02,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:37:02,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:37:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:37:03,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:37:03,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1004 transitions, 55815 flow. Second operand has 24 states, 24 states have (on average 14.041666666666666) internal successors, (337), 24 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:03,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:03,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:37:03,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:11,038 INFO L124 PetriNetUnfolderBase]: 4135/7430 cut-off events. [2024-02-05 10:37:11,038 INFO L125 PetriNetUnfolderBase]: For 934044/934044 co-relation queries the response was YES. [2024-02-05 10:37:11,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136473 conditions, 7430 events. 4135/7430 cut-off events. For 934044/934044 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 55218 event pairs, 365 based on Foata normal form. 2/7431 useless extension candidates. Maximal degree in co-relation 136287. Up to 3698 conditions per place. [2024-02-05 10:37:11,149 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 417 selfloop transitions, 824 changer transitions 16/1260 dead transitions. [2024-02-05 10:37:11,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 1260 transitions, 67431 flow [2024-02-05 10:37:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-02-05 10:37:11,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-02-05 10:37:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 751 transitions. [2024-02-05 10:37:11,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950560316413975 [2024-02-05 10:37:11,151 INFO L175 Difference]: Start difference. First operand has 580 places, 1004 transitions, 55815 flow. Second operand 41 states and 751 transitions. [2024-02-05 10:37:11,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 1260 transitions, 67431 flow [2024-02-05 10:37:19,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1260 transitions, 66682 flow, removed 298 selfloop flow, removed 12 redundant places. [2024-02-05 10:37:19,759 INFO L231 Difference]: Finished difference. Result has 622 places, 1130 transitions, 65359 flow [2024-02-05 10:37:19,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=55229, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=65359, PETRI_PLACES=622, PETRI_TRANSITIONS=1130} [2024-02-05 10:37:19,761 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 583 predicate places. [2024-02-05 10:37:19,761 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 1130 transitions, 65359 flow [2024-02-05 10:37:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.041666666666666) internal successors, (337), 24 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-05 10:37:19,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:19,761 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] [2024-02-05 10:37:19,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-02-05 10:37:19,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:19,968 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:37:19,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1235616364, now seen corresponding path program 21 times [2024-02-05 10:37:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:19,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553685854] [2024-02-05 10:37:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:20,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:20,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553685854] [2024-02-05 10:37:20,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553685854] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:20,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311875947] [2024-02-05 10:37:20,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-05 10:37:20,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:20,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:20,409 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:20,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-02-05 10:37:20,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-05 10:37:20,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:20,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-05 10:37:20,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:20,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:21,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311875947] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:21,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:21,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-02-05 10:37:21,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862804868] [2024-02-05 10:37:21,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:21,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:37:21,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:21,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:37:21,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:37:23,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:37:23,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 1130 transitions, 65359 flow. Second operand has 22 states, 22 states have (on average 14.318181818181818) internal successors, (315), 22 states have internal predecessors, (315), 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 10:37:23,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:23,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:37:23,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:30,688 INFO L124 PetriNetUnfolderBase]: 4368/7858 cut-off events. [2024-02-05 10:37:30,688 INFO L125 PetriNetUnfolderBase]: For 1046267/1046267 co-relation queries the response was YES. [2024-02-05 10:37:30,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148884 conditions, 7858 events. 4368/7858 cut-off events. For 1046267/1046267 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 59154 event pairs, 407 based on Foata normal form. 2/7859 useless extension candidates. Maximal degree in co-relation 148688. Up to 4270 conditions per place. [2024-02-05 10:37:30,820 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 412 selfloop transitions, 855 changer transitions 14/1284 dead transitions. [2024-02-05 10:37:30,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 1284 transitions, 73084 flow [2024-02-05 10:37:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-05 10:37:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-05 10:37:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 546 transitions. [2024-02-05 10:37:30,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47602441150828245 [2024-02-05 10:37:30,822 INFO L175 Difference]: Start difference. First operand has 622 places, 1130 transitions, 65359 flow. Second operand 31 states and 546 transitions. [2024-02-05 10:37:30,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 1284 transitions, 73084 flow [2024-02-05 10:37:42,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 1284 transitions, 72416 flow, removed 281 selfloop flow, removed 16 redundant places. [2024-02-05 10:37:42,147 INFO L231 Difference]: Finished difference. Result has 646 places, 1206 transitions, 72533 flow [2024-02-05 10:37:42,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64813, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=784, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=72533, PETRI_PLACES=646, PETRI_TRANSITIONS=1206} [2024-02-05 10:37:42,148 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 607 predicate places. [2024-02-05 10:37:42,148 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 1206 transitions, 72533 flow [2024-02-05 10:37:42,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.318181818181818) internal successors, (315), 22 states have internal predecessors, (315), 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 10:37:42,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:37:42,149 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] [2024-02-05 10:37:42,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-02-05 10:37:42,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:42,360 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:37:42,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:37:42,360 INFO L85 PathProgramCache]: Analyzing trace with hash -239167738, now seen corresponding path program 22 times [2024-02-05 10:37:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:37:42,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876713498] [2024-02-05 10:37:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:37:42,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:37:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:37:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:42,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:37:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876713498] [2024-02-05 10:37:42,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876713498] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:37:42,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093944777] [2024-02-05 10:37:42,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-05 10:37:42,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:37:42,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:37:42,864 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:37:42,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-02-05 10:37:42,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-05 10:37:42,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:37:42,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:37:42,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:37:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:43,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:37:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:37:44,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093944777] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:37:44,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:37:44,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:37:44,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018177195] [2024-02-05 10:37:44,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:37:44,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:37:44,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:37:44,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:37:44,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:37:45,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:37:45,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1206 transitions, 72533 flow. Second operand has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 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 10:37:45,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:37:45,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:37:45,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:37:54,344 INFO L124 PetriNetUnfolderBase]: 4492/8112 cut-off events. [2024-02-05 10:37:54,345 INFO L125 PetriNetUnfolderBase]: For 1200840/1200840 co-relation queries the response was YES. [2024-02-05 10:37:54,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158630 conditions, 8112 events. 4492/8112 cut-off events. For 1200840/1200840 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 61676 event pairs, 407 based on Foata normal form. 4/8115 useless extension candidates. Maximal degree in co-relation 158428. Up to 4011 conditions per place. [2024-02-05 10:37:54,479 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 414 selfloop transitions, 946 changer transitions 13/1376 dead transitions. [2024-02-05 10:37:54,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 1376 transitions, 78918 flow [2024-02-05 10:37:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-02-05 10:37:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-02-05 10:37:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 849 transitions. [2024-02-05 10:37:54,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48821161587119033 [2024-02-05 10:37:54,481 INFO L175 Difference]: Start difference. First operand has 646 places, 1206 transitions, 72533 flow. Second operand 47 states and 849 transitions. [2024-02-05 10:37:54,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 1376 transitions, 78918 flow [2024-02-05 10:38:09,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 1376 transitions, 78686 flow, removed 63 selfloop flow, removed 16 redundant places. [2024-02-05 10:38:09,221 INFO L231 Difference]: Finished difference. Result has 681 places, 1242 transitions, 77754 flow [2024-02-05 10:38:09,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=72323, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=914, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=77754, PETRI_PLACES=681, PETRI_TRANSITIONS=1242} [2024-02-05 10:38:09,223 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 642 predicate places. [2024-02-05 10:38:09,223 INFO L495 AbstractCegarLoop]: Abstraction has has 681 places, 1242 transitions, 77754 flow [2024-02-05 10:38:09,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 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 10:38:09,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:09,223 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] [2024-02-05 10:38:09,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-02-05 10:38:09,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:38:09,435 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:38:09,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:09,435 INFO L85 PathProgramCache]: Analyzing trace with hash -149067134, now seen corresponding path program 23 times [2024-02-05 10:38:09,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:09,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456174864] [2024-02-05 10:38:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:09,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:10,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:10,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456174864] [2024-02-05 10:38:10,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456174864] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:38:10,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522227598] [2024-02-05 10:38:10,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-05 10:38:10,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:38:10,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:38:10,024 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:38:10,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-02-05 10:38:10,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-05 10:38:10,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:38:10,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:38:10,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:38:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:10,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:38:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522227598] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:38:11,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:38:11,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-02-05 10:38:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037032919] [2024-02-05 10:38:11,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:38:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-02-05 10:38:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-02-05 10:38:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-02-05 10:38:12,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:38:12,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 1242 transitions, 77754 flow. Second operand has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 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 10:38:12,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:12,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:38:12,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:21,578 INFO L124 PetriNetUnfolderBase]: 4745/8588 cut-off events. [2024-02-05 10:38:21,578 INFO L125 PetriNetUnfolderBase]: For 1374027/1374027 co-relation queries the response was YES. [2024-02-05 10:38:21,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173018 conditions, 8588 events. 4745/8588 cut-off events. For 1374027/1374027 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 66300 event pairs, 439 based on Foata normal form. 4/8591 useless extension candidates. Maximal degree in co-relation 172835. Up to 4554 conditions per place. [2024-02-05 10:38:21,867 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 445 selfloop transitions, 970 changer transitions 17/1435 dead transitions. [2024-02-05 10:38:21,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1435 transitions, 86295 flow [2024-02-05 10:38:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-02-05 10:38:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-02-05 10:38:21,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 759 transitions. [2024-02-05 10:38:21,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48841698841698844 [2024-02-05 10:38:21,869 INFO L175 Difference]: Start difference. First operand has 681 places, 1242 transitions, 77754 flow. Second operand 42 states and 759 transitions. [2024-02-05 10:38:21,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1435 transitions, 86295 flow [2024-02-05 10:38:37,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 1435 transitions, 85726 flow, removed 224 selfloop flow, removed 19 redundant places. [2024-02-05 10:38:37,297 INFO L231 Difference]: Finished difference. Result has 713 places, 1304 transitions, 85368 flow [2024-02-05 10:38:37,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=77237, PETRI_DIFFERENCE_MINUEND_PLACES=661, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=915, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=85368, PETRI_PLACES=713, PETRI_TRANSITIONS=1304} [2024-02-05 10:38:37,299 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 674 predicate places. [2024-02-05 10:38:37,300 INFO L495 AbstractCegarLoop]: Abstraction has has 713 places, 1304 transitions, 85368 flow [2024-02-05 10:38:37,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 14.08695652173913) internal successors, (324), 23 states have internal predecessors, (324), 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 10:38:37,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:38:37,300 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] [2024-02-05 10:38:37,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-02-05 10:38:37,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-02-05 10:38:37,512 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:38:37,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:38:37,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1172154490, now seen corresponding path program 24 times [2024-02-05 10:38:37,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:38:37,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935899101] [2024-02-05 10:38:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:38:37,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:38:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:38:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:37,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:38:37,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935899101] [2024-02-05 10:38:37,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935899101] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:38:37,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613374931] [2024-02-05 10:38:37,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-05 10:38:37,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:38:37,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:38:37,950 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:38:37,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-02-05 10:38:38,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-05 10:38:38,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:38:38,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-05 10:38:38,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:38:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:38,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:38:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:38:39,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613374931] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:38:39,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:38:39,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-02-05 10:38:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826615189] [2024-02-05 10:38:39,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:38:39,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-02-05 10:38:39,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:38:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-02-05 10:38:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-02-05 10:38:40,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:38:40,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 713 places, 1304 transitions, 85368 flow. Second operand has 22 states, 22 states have (on average 14.181818181818182) internal successors, (312), 22 states have internal predecessors, (312), 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 10:38:40,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:38:40,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:38:40,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:38:48,112 INFO L124 PetriNetUnfolderBase]: 4749/8590 cut-off events. [2024-02-05 10:38:48,112 INFO L125 PetriNetUnfolderBase]: For 1444479/1444479 co-relation queries the response was YES. [2024-02-05 10:38:48,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180358 conditions, 8590 events. 4749/8590 cut-off events. For 1444479/1444479 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 66273 event pairs, 523 based on Foata normal form. 2/8591 useless extension candidates. Maximal degree in co-relation 180141. Up to 5536 conditions per place. [2024-02-05 10:38:48,453 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 483 selfloop transitions, 867 changer transitions 14/1367 dead transitions. [2024-02-05 10:38:48,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 734 places, 1367 transitions, 88900 flow [2024-02-05 10:38:48,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-05 10:38:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-05 10:38:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 427 transitions. [2024-02-05 10:38:48,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48085585585585583 [2024-02-05 10:38:48,455 INFO L175 Difference]: Start difference. First operand has 713 places, 1304 transitions, 85368 flow. Second operand 24 states and 427 transitions. [2024-02-05 10:38:48,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 734 places, 1367 transitions, 88900 flow [2024-02-05 10:39:06,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 1367 transitions, 88575 flow, removed 88 selfloop flow, removed 23 redundant places. [2024-02-05 10:39:06,272 INFO L231 Difference]: Finished difference. Result has 716 places, 1308 transitions, 88295 flow [2024-02-05 10:39:06,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=85043, PETRI_DIFFERENCE_MINUEND_PLACES=688, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=863, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=88295, PETRI_PLACES=716, PETRI_TRANSITIONS=1308} [2024-02-05 10:39:06,274 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 677 predicate places. [2024-02-05 10:39:06,274 INFO L495 AbstractCegarLoop]: Abstraction has has 716 places, 1308 transitions, 88295 flow [2024-02-05 10:39:06,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.181818181818182) internal successors, (312), 22 states have internal predecessors, (312), 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 10:39:06,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:39:06,274 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] [2024-02-05 10:39:06,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-02-05 10:39:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-02-05 10:39:06,480 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:39:06,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:39:06,480 INFO L85 PathProgramCache]: Analyzing trace with hash 470689708, now seen corresponding path program 25 times [2024-02-05 10:39:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:39:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206957603] [2024-02-05 10:39:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:39:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:39:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:39:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:39:06,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:39:06,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206957603] [2024-02-05 10:39:06,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206957603] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:39:06,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833284745] [2024-02-05 10:39:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-05 10:39:06,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:39:06,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:39:06,937 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:39:06,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-02-05 10:39:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:39:07,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:39:07,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:39:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:39:07,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:39:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:39:08,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833284745] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:39:08,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:39:08,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:39:08,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923520164] [2024-02-05 10:39:08,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:39:08,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:39:08,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:39:08,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:39:08,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:39:09,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-02-05 10:39:09,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 1308 transitions, 88295 flow. Second operand has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 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 10:39:09,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:39:09,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-02-05 10:39:09,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:39:17,677 INFO L124 PetriNetUnfolderBase]: 4830/8771 cut-off events. [2024-02-05 10:39:17,677 INFO L125 PetriNetUnfolderBase]: For 1494572/1494572 co-relation queries the response was YES. [2024-02-05 10:39:17,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187686 conditions, 8771 events. 4830/8771 cut-off events. For 1494572/1494572 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 68185 event pairs, 469 based on Foata normal form. 3/8773 useless extension candidates. Maximal degree in co-relation 187469. Up to 5202 conditions per place. [2024-02-05 10:39:17,845 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 473 selfloop transitions, 934 changer transitions 11/1421 dead transitions. [2024-02-05 10:39:17,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 751 places, 1421 transitions, 92917 flow [2024-02-05 10:39:17,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-05 10:39:17,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-05 10:39:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 673 transitions. [2024-02-05 10:39:17,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786628733997155 [2024-02-05 10:39:17,847 INFO L175 Difference]: Start difference. First operand has 716 places, 1308 transitions, 88295 flow. Second operand 38 states and 673 transitions. [2024-02-05 10:39:17,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 751 places, 1421 transitions, 92917 flow [2024-02-05 10:39:38,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 1421 transitions, 92806 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-02-05 10:39:38,374 INFO L231 Difference]: Finished difference. Result has 744 places, 1326 transitions, 92869 flow [2024-02-05 10:39:38,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=88188, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=917, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=92869, PETRI_PLACES=744, PETRI_TRANSITIONS=1326} [2024-02-05 10:39:38,376 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 705 predicate places. [2024-02-05 10:39:38,376 INFO L495 AbstractCegarLoop]: Abstraction has has 744 places, 1326 transitions, 92869 flow [2024-02-05 10:39:38,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.083333333333334) internal successors, (338), 24 states have internal predecessors, (338), 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 10:39:38,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-05 10:39:38,377 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] [2024-02-05 10:39:38,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-02-05 10:39:38,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-02-05 10:39:38,588 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-02-05 10:39:38,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-05 10:39:38,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1379576604, now seen corresponding path program 26 times [2024-02-05 10:39:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-05 10:39:38,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626372155] [2024-02-05 10:39:38,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-05 10:39:38,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-05 10:39:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-05 10:39:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:39:39,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-05 10:39:39,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626372155] [2024-02-05 10:39:39,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626372155] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-05 10:39:39,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98439928] [2024-02-05 10:39:39,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-05 10:39:39,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-05 10:39:39,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-05 10:39:39,093 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-05 10:39:39,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-02-05 10:39:39,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-05 10:39:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-05 10:39:39,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-02-05 10:39:39,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-05 10:39:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:39:39,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-05 10:39:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-05 10:39:40,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98439928] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-05 10:39:40,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-05 10:39:40,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-02-05 10:39:40,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156642832] [2024-02-05 10:39:40,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-05 10:39:40,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-02-05 10:39:40,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-05 10:39:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-02-05 10:39:40,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-02-05 10:39:45,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-05 10:39:45,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-02-05 10:39:45,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 744 places, 1326 transitions, 92869 flow. Second operand has 24 states, 24 states have (on average 13.041666666666666) internal successors, (313), 24 states have internal predecessors, (313), 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 10:39:45,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-05 10:39:45,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-02-05 10:39:45,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-05 10:39:53,394 INFO L124 PetriNetUnfolderBase]: 4818/8733 cut-off events. [2024-02-05 10:39:53,395 INFO L125 PetriNetUnfolderBase]: For 1606652/1606652 co-relation queries the response was YES. [2024-02-05 10:39:53,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193750 conditions, 8733 events. 4818/8733 cut-off events. For 1606652/1606652 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 67750 event pairs, 445 based on Foata normal form. 5/8737 useless extension candidates. Maximal degree in co-relation 193540. Up to 5222 conditions per place. [2024-02-05 10:39:53,595 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 468 selfloop transitions, 941 changer transitions 12/1424 dead transitions. [2024-02-05 10:39:53,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 1424 transitions, 96554 flow [2024-02-05 10:39:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-02-05 10:39:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-02-05 10:39:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 642 transitions. [2024-02-05 10:39:53,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4566145092460882 [2024-02-05 10:39:53,613 INFO L175 Difference]: Start difference. First operand has 744 places, 1326 transitions, 92869 flow. Second operand 38 states and 642 transitions. [2024-02-05 10:39:53,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 1424 transitions, 96554 flow