./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.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/mult-comm.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fced0e87 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.2023-12-19_14-39-08.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-wip.fs.extract-columns-fced0e8-m [2024-01-31 16:08:45,968 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:08:46,016 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:08:46,020 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:08:46,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:08:46,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:08:46,034 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:08:46,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:08:46,035 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:08:46,035 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:08:46,036 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:08:46,036 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:08:46,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:08:46,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:08:46,037 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:08:46,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:08:46,037 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:08:46,038 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:08:46,038 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:08:46,038 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:08:46,038 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:08:46,039 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:08:46,039 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:08:46,039 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:08:46,040 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:08:46,040 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:08:46,040 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:08:46,040 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:08:46,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:08:46,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:08:46,041 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:08:46,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:08:46,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:08:46,042 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:08:46,042 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:08:46,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:08:46,043 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:08:46,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:08:46,043 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:08:46,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:08:46,044 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:08:46,050 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:08:46,050 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:08:46,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:08:46,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:08:46,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:08:46,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:08:46,304 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:08:46,305 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:08:46,306 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/mult-comm.wvr.yml/witness.yml [2024-01-31 16:08:46,383 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:08:46,385 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:08:46,386 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2024-01-31 16:08:47,396 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:08:47,531 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:08:47,532 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2024-01-31 16:08:47,537 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e329aa3ef/303141f8c52e4a13b5a22ef6460bc341/FLAGce93d962d [2024-01-31 16:08:47,548 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e329aa3ef/303141f8c52e4a13b5a22ef6460bc341 [2024-01-31 16:08:47,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:08:47,549 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:08:47,550 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:08:47,550 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:08:47,554 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:08:47,554 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:08:46" (1/2) ... [2024-01-31 16:08:47,555 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22af1f32 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:08:47, skipping insertion in model container [2024-01-31 16:08:47,555 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:08:46" (1/2) ... [2024-01-31 16:08:47,556 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@760ca63a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:08:47, skipping insertion in model container [2024-01-31 16:08:47,556 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:08:47" (2/2) ... [2024-01-31 16:08:47,556 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22af1f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47, skipping insertion in model container [2024-01-31 16:08:47,557 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:08:47" (2/2) ... [2024-01-31 16:08:47,557 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:08:47,574 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:08:47,575 INFO L98 nessWitnessExtractor]: Location invariant before [L46-L46] (unsigned long )_argptr == 0UL [2024-01-31 16:08:47,575 INFO L98 nessWitnessExtractor]: Location invariant before [L54-L54] (unsigned long )_argptr == 0UL [2024-01-31 16:08:47,575 INFO L98 nessWitnessExtractor]: Location invariant before [L62-L62] ((x_1 == 0U) && (x_2 == 0U)) && (b == 0U) [2024-01-31 16:08:47,575 INFO L98 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)) [2024-01-31 16:08:47,576 INFO L98 nessWitnessExtractor]: Location invariant before [L64-L64] (x_1 == 0U) && (x_2 == 0U) [2024-01-31 16:08:47,576 INFO L98 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) [2024-01-31 16:08:47,576 INFO L98 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) [2024-01-31 16:08:47,576 INFO L98 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) [2024-01-31 16:08:47,576 INFO L98 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)) [2024-01-31 16:08:47,594 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:08:47,722 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] [2024-01-31 16:08:47,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:08:47,733 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 [2024-01-31 16:08:47,789 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] [2024-01-31 16:08:47,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:08:47,803 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:08:47,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47 WrapperNode [2024-01-31 16:08:47,804 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:08:47,805 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:08:47,805 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:08:47,805 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:08:47,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,846 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2024-01-31 16:08:47,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:08:47,848 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:08:47,848 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:08:47,848 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:08:47,858 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,863 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,885 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]. [2024-01-31 16:08:47,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,886 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,900 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,917 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,919 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:08:47,921 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:08:47,921 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:08:47,921 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:08:47,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (1/1) ... [2024-01-31 16:08:47,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:08:47,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:08:47,957 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) [2024-01-31 16:08:47,966 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 [2024-01-31 16:08:47,991 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:08:47,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:08:47,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:08:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:08:47,992 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:08:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:08:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:08:47,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:08:47,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:08:47,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:08:47,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:08:47,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:08:47,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:08:47,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:08:47,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:08:47,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:08:47,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:08:47,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:08:47,997 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 16:08:48,142 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:08:48,144 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:08:48,351 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:08:48,352 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:08:48,423 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:08:48,423 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 16:08:48,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:08:48 BoogieIcfgContainer [2024-01-31 16:08:48,424 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:08:48,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:08:48,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:08:48,427 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:08:48,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:08:46" (1/4) ... [2024-01-31 16:08:48,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a14c2f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:08:48, skipping insertion in model container [2024-01-31 16:08:48,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:08:47" (2/4) ... [2024-01-31 16:08:48,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a14c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:08:48, skipping insertion in model container [2024-01-31 16:08:48,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:08:47" (3/4) ... [2024-01-31 16:08:48,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a14c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:08:48, skipping insertion in model container [2024-01-31 16:08:48,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:08:48" (4/4) ... [2024-01-31 16:08:48,432 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2024-01-31 16:08:48,445 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:08:48,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-01-31 16:08:48,446 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:08:48,525 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 16:08:48,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 37 transitions, 88 flow [2024-01-31 16:08:48,573 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2024-01-31 16:08:48,574 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:08:48,576 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. [2024-01-31 16:08:48,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 37 transitions, 88 flow [2024-01-31 16:08:48,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 34 transitions, 80 flow [2024-01-31 16:08:48,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:08:48,603 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;@48f40a34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:08:48,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-01-31 16:08:48,610 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:08:48,610 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-01-31 16:08:48,610 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-31 16:08:48,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:48,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-01-31 16:08:48,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:48,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:48,616 INFO L85 PathProgramCache]: Analyzing trace with hash 7887, now seen corresponding path program 1 times [2024-01-31 16:08:48,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:48,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145247521] [2024-01-31 16:08:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:48,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:49,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:49,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145247521] [2024-01-31 16:08:49,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145247521] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:08:49,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:08:49,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-01-31 16:08:49,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157277098] [2024-01-31 16:08:49,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:08:49,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:08:49,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:08:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:08:49,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-31 16:08:49,058 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) [2024-01-31 16:08:49,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:49,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-31 16:08:49,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:49,177 INFO L124 PetriNetUnfolderBase]: 96/209 cut-off events. [2024-01-31 16:08:49,177 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-01-31 16:08:49,179 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. [2024-01-31 16:08:49,183 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 22 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-01-31 16:08:49,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 126 flow [2024-01-31 16:08:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:08:49,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:08:49,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-01-31 16:08:49,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2024-01-31 16:08:49,196 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 80 flow. Second operand 3 states and 58 transitions. [2024-01-31 16:08:49,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 126 flow [2024-01-31 16:08:49,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 118 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:08:49,201 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 74 flow [2024-01-31 16:08:49,202 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} [2024-01-31 16:08:49,205 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2024-01-31 16:08:49,205 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 74 flow [2024-01-31 16:08:49,206 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) [2024-01-31 16:08:49,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:49,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-01-31 16:08:49,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:08:49,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:49,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:49,208 INFO L85 PathProgramCache]: Analyzing trace with hash 244743, now seen corresponding path program 1 times [2024-01-31 16:08:49,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:49,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652937952] [2024-01-31 16:08:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:49,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:49,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652937952] [2024-01-31 16:08:49,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652937952] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:08:49,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:08:49,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:08:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314776433] [2024-01-31 16:08:49,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:08:49,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:08:49,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:08:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:08:49,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:08:49,288 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) [2024-01-31 16:08:49,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:49,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:08:49,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:49,379 INFO L124 PetriNetUnfolderBase]: 79/173 cut-off events. [2024-01-31 16:08:49,380 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:08:49,380 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. [2024-01-31 16:08:49,382 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 20 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2024-01-31 16:08:49,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 116 flow [2024-01-31 16:08:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:08:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:08:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-01-31 16:08:49,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-01-31 16:08:49,387 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 74 flow. Second operand 3 states and 62 transitions. [2024-01-31 16:08:49,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 116 flow [2024-01-31 16:08:49,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:08:49,394 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 72 flow [2024-01-31 16:08:49,394 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} [2024-01-31 16:08:49,395 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2024-01-31 16:08:49,396 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 72 flow [2024-01-31 16:08:49,396 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) [2024-01-31 16:08:49,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:49,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-01-31 16:08:49,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:08:49,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:49,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash 7587270, now seen corresponding path program 1 times [2024-01-31 16:08:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:49,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31430163] [2024-01-31 16:08:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:49,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:49,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:49,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31430163] [2024-01-31 16:08:49,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31430163] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:08:49,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:08:49,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 16:08:49,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878753198] [2024-01-31 16:08:49,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:08:49,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 16:08:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 16:08:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 16:08:49,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 37 [2024-01-31 16:08:49,451 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) [2024-01-31 16:08:49,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:49,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 37 [2024-01-31 16:08:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:49,554 INFO L124 PetriNetUnfolderBase]: 124/284 cut-off events. [2024-01-31 16:08:49,554 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 16:08:49,556 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. [2024-01-31 16:08:49,558 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 30 selfloop transitions, 3 changer transitions 1/45 dead transitions. [2024-01-31 16:08:49,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 169 flow [2024-01-31 16:08:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 16:08:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 16:08:49,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-01-31 16:08:49,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2024-01-31 16:08:49,561 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 72 flow. Second operand 3 states and 81 transitions. [2024-01-31 16:08:49,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 169 flow [2024-01-31 16:08:49,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 45 transitions, 165 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:08:49,564 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 85 flow [2024-01-31 16:08:49,564 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} [2024-01-31 16:08:49,565 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2024-01-31 16:08:49,565 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 85 flow [2024-01-31 16:08:49,566 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) [2024-01-31 16:08:49,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:49,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:08:49,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 16:08:49,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:49,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:49,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1600639607, now seen corresponding path program 1 times [2024-01-31 16:08:49,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:49,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072210052] [2024-01-31 16:08:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:49,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:49,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:49,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072210052] [2024-01-31 16:08:49,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072210052] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:08:49,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:08:49,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:08:49,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493228203] [2024-01-31 16:08:49,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:08:49,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:08:49,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:49,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:08:49,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:08:49,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:08:49,783 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) [2024-01-31 16:08:49,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:49,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:08:49,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:49,863 INFO L124 PetriNetUnfolderBase]: 147/337 cut-off events. [2024-01-31 16:08:49,863 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-01-31 16:08:49,864 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. [2024-01-31 16:08:49,865 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 29 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-01-31 16:08:49,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 39 transitions, 165 flow [2024-01-31 16:08:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:08:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:08:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-01-31 16:08:49,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540540540540541 [2024-01-31 16:08:49,870 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 85 flow. Second operand 4 states and 82 transitions. [2024-01-31 16:08:49,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 39 transitions, 165 flow [2024-01-31 16:08:49,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:08:49,872 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 82 flow [2024-01-31 16:08:49,872 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} [2024-01-31 16:08:49,873 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2024-01-31 16:08:49,874 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 82 flow [2024-01-31 16:08:49,874 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) [2024-01-31 16:08:49,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:49,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:08:49,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 16:08:49,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:49,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash -616362260, now seen corresponding path program 1 times [2024-01-31 16:08:49,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:49,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643129416] [2024-01-31 16:08:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:49,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:50,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:50,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643129416] [2024-01-31 16:08:50,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643129416] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:08:50,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:08:50,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:08:50,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955932843] [2024-01-31 16:08:50,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:08:50,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:08:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:50,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:08:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:08:50,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-31 16:08:50,032 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) [2024-01-31 16:08:50,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:50,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-31 16:08:50,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:50,117 INFO L124 PetriNetUnfolderBase]: 190/352 cut-off events. [2024-01-31 16:08:50,117 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-01-31 16:08:50,118 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. [2024-01-31 16:08:50,120 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 37 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-01-31 16:08:50,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 210 flow [2024-01-31 16:08:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:08:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:08:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-01-31 16:08:50,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608108108108109 [2024-01-31 16:08:50,122 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 82 flow. Second operand 4 states and 83 transitions. [2024-01-31 16:08:50,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 210 flow [2024-01-31 16:08:50,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 48 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:08:50,124 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 104 flow [2024-01-31 16:08:50,124 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} [2024-01-31 16:08:50,126 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2024-01-31 16:08:50,126 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 104 flow [2024-01-31 16:08:50,126 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) [2024-01-31 16:08:50,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:50,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:08:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 16:08:50,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:50,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash -617207749, now seen corresponding path program 1 times [2024-01-31 16:08:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683181911] [2024-01-31 16:08:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:50,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:50,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683181911] [2024-01-31 16:08:50,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683181911] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:08:50,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:08:50,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:08:50,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938952294] [2024-01-31 16:08:50,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:08:50,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:08:50,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:08:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:08:50,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:08:50,292 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) [2024-01-31 16:08:50,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:50,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:08:50,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:50,378 INFO L124 PetriNetUnfolderBase]: 164/335 cut-off events. [2024-01-31 16:08:50,379 INFO L125 PetriNetUnfolderBase]: For 350/392 co-relation queries the response was YES. [2024-01-31 16:08:50,379 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. [2024-01-31 16:08:50,380 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 37 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-01-31 16:08:50,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 251 flow [2024-01-31 16:08:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:08:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:08:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-01-31 16:08:50,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.581081081081081 [2024-01-31 16:08:50,382 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 104 flow. Second operand 4 states and 86 transitions. [2024-01-31 16:08:50,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 251 flow [2024-01-31 16:08:50,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 45 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:08:50,383 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 103 flow [2024-01-31 16:08:50,384 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} [2024-01-31 16:08:50,384 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2024-01-31 16:08:50,384 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 103 flow [2024-01-31 16:08:50,384 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) [2024-01-31 16:08:50,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:50,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:08:50,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 16:08:50,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:50,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash -431151554, now seen corresponding path program 1 times [2024-01-31 16:08:50,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:50,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281919350] [2024-01-31 16:08:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:50,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:50,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281919350] [2024-01-31 16:08:50,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281919350] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:08:50,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:08:50,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 16:08:50,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457004067] [2024-01-31 16:08:50,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:08:50,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:08:50,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:50,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:08:50,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:08:50,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-31 16:08:50,551 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) [2024-01-31 16:08:50,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:50,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-31 16:08:50,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:50,626 INFO L124 PetriNetUnfolderBase]: 216/373 cut-off events. [2024-01-31 16:08:50,626 INFO L125 PetriNetUnfolderBase]: For 386/440 co-relation queries the response was YES. [2024-01-31 16:08:50,627 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. [2024-01-31 16:08:50,629 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 40 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2024-01-31 16:08:50,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 273 flow [2024-01-31 16:08:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:08:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:08:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-01-31 16:08:50,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608108108108109 [2024-01-31 16:08:50,630 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 103 flow. Second operand 4 states and 83 transitions. [2024-01-31 16:08:50,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 273 flow [2024-01-31 16:08:50,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 49 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 16:08:50,633 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 125 flow [2024-01-31 16:08:50,633 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} [2024-01-31 16:08:50,634 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-01-31 16:08:50,634 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 125 flow [2024-01-31 16:08:50,635 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) [2024-01-31 16:08:50,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:50,635 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] [2024-01-31 16:08:50,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 16:08:50,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:50,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1942936233, now seen corresponding path program 1 times [2024-01-31 16:08:50,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:50,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496933716] [2024-01-31 16:08:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:50,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:50,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:50,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496933716] [2024-01-31 16:08:50,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496933716] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:08:50,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857679373] [2024-01-31 16:08:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:50,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:08:50,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:08:50,875 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) [2024-01-31 16:08:50,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 16:08:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:50,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:08:50,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:08:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:51,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:08:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:51,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857679373] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:08:51,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:08:51,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2024-01-31 16:08:51,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474753422] [2024-01-31 16:08:51,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:08:51,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:08:51,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:51,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:08:51,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:08:51,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-31 16:08:51,376 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) [2024-01-31 16:08:51,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:51,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-31 16:08:51,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:51,731 INFO L124 PetriNetUnfolderBase]: 403/757 cut-off events. [2024-01-31 16:08:51,731 INFO L125 PetriNetUnfolderBase]: For 742/802 co-relation queries the response was YES. [2024-01-31 16:08:51,733 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. [2024-01-31 16:08:51,735 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 87 selfloop transitions, 27 changer transitions 16/135 dead transitions. [2024-01-31 16:08:51,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 135 transitions, 773 flow [2024-01-31 16:08:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:08:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:08:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 329 transitions. [2024-01-31 16:08:51,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2024-01-31 16:08:51,737 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 125 flow. Second operand 14 states and 329 transitions. [2024-01-31 16:08:51,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 135 transitions, 773 flow [2024-01-31 16:08:51,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 135 transitions, 770 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 16:08:51,740 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 383 flow [2024-01-31 16:08:51,740 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} [2024-01-31 16:08:51,741 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2024-01-31 16:08:51,741 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 383 flow [2024-01-31 16:08:51,741 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) [2024-01-31 16:08:51,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:51,741 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] [2024-01-31 16:08:51,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 16:08:51,953 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 [2024-01-31 16:08:51,954 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:51,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2076900495, now seen corresponding path program 2 times [2024-01-31 16:08:51,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:51,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666637766] [2024-01-31 16:08:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:51,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:52,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:52,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666637766] [2024-01-31 16:08:52,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666637766] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:08:52,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350205731] [2024-01-31 16:08:52,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:08:52,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:08:52,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:08:52,102 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) [2024-01-31 16:08:52,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 16:08:52,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:08:52,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:08:52,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:08:52,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:08:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:52,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:08:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:08:52,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350205731] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:08:52,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:08:52,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 14 [2024-01-31 16:08:52,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424633643] [2024-01-31 16:08:52,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:08:52,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:08:52,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:08:52,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:08:52,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 37 [2024-01-31 16:08:52,457 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) [2024-01-31 16:08:52,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:52,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 37 [2024-01-31 16:08:52,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:52,621 INFO L124 PetriNetUnfolderBase]: 370/748 cut-off events. [2024-01-31 16:08:52,621 INFO L125 PetriNetUnfolderBase]: For 1746/1830 co-relation queries the response was YES. [2024-01-31 16:08:52,624 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. [2024-01-31 16:08:52,626 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 52 selfloop transitions, 6 changer transitions 13/81 dead transitions. [2024-01-31 16:08:52,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 650 flow [2024-01-31 16:08:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:08:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:08:52,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-01-31 16:08:52,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6972972972972973 [2024-01-31 16:08:52,627 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 383 flow. Second operand 5 states and 129 transitions. [2024-01-31 16:08:52,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 650 flow [2024-01-31 16:08:52,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 621 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-01-31 16:08:52,634 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 387 flow [2024-01-31 16:08:52,635 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} [2024-01-31 16:08:52,635 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 23 predicate places. [2024-01-31 16:08:52,636 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 387 flow [2024-01-31 16:08:52,637 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) [2024-01-31 16:08:52,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:52,637 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] [2024-01-31 16:08:52,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 16:08:52,854 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 [2024-01-31 16:08:52,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:52,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:52,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1997954195, now seen corresponding path program 3 times [2024-01-31 16:08:52,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:52,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276342389] [2024-01-31 16:08:52,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:52,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:53,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:53,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276342389] [2024-01-31 16:08:53,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276342389] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:08:53,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337387512] [2024-01-31 16:08:53,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:08:53,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:08:53,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:08:53,036 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) [2024-01-31 16:08:53,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 16:08:53,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:08:53,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:08:53,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:08:53,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:08:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:53,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:08:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:53,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337387512] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:08:53,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:08:53,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2024-01-31 16:08:53,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289564148] [2024-01-31 16:08:53,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:08:53,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 16:08:53,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:53,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 16:08:53,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:08:53,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-31 16:08:53,409 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) [2024-01-31 16:08:53,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:53,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-31 16:08:53,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:53,679 INFO L124 PetriNetUnfolderBase]: 430/802 cut-off events. [2024-01-31 16:08:53,680 INFO L125 PetriNetUnfolderBase]: For 1835/1897 co-relation queries the response was YES. [2024-01-31 16:08:53,681 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. [2024-01-31 16:08:53,684 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 77 selfloop transitions, 26 changer transitions 10/118 dead transitions. [2024-01-31 16:08:53,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 118 transitions, 891 flow [2024-01-31 16:08:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:08:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:08:53,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-01-31 16:08:53,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6351351351351351 [2024-01-31 16:08:53,685 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 387 flow. Second operand 10 states and 235 transitions. [2024-01-31 16:08:53,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 118 transitions, 891 flow [2024-01-31 16:08:53,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 861 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-01-31 16:08:53,690 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 592 flow [2024-01-31 16:08:53,690 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} [2024-01-31 16:08:53,690 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 32 predicate places. [2024-01-31 16:08:53,691 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 592 flow [2024-01-31 16:08:53,691 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) [2024-01-31 16:08:53,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:53,691 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] [2024-01-31 16:08:53,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 16:08:53,903 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 [2024-01-31 16:08:53,903 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:53,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash 77687417, now seen corresponding path program 1 times [2024-01-31 16:08:53,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:53,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249610975] [2024-01-31 16:08:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:53,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:54,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:54,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249610975] [2024-01-31 16:08:54,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249610975] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:08:54,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320421387] [2024-01-31 16:08:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:54,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:08:54,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:08:54,045 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) [2024-01-31 16:08:54,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 16:08:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:54,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:08:54,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:08:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:54,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:08:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:54,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320421387] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:08:54,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:08:54,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-01-31 16:08:54,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102258162] [2024-01-31 16:08:54,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:08:54,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 16:08:54,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 16:08:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-01-31 16:08:54,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-01-31 16:08:54,361 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) [2024-01-31 16:08:54,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:54,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-01-31 16:08:54,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:54,540 INFO L124 PetriNetUnfolderBase]: 476/894 cut-off events. [2024-01-31 16:08:54,541 INFO L125 PetriNetUnfolderBase]: For 3058/3092 co-relation queries the response was YES. [2024-01-31 16:08:54,542 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. [2024-01-31 16:08:54,545 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 58 selfloop transitions, 17 changer transitions 18/103 dead transitions. [2024-01-31 16:08:54,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 103 transitions, 919 flow [2024-01-31 16:08:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:08:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:08:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-01-31 16:08:54,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6061776061776062 [2024-01-31 16:08:54,547 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 592 flow. Second operand 7 states and 157 transitions. [2024-01-31 16:08:54,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 103 transitions, 919 flow [2024-01-31 16:08:54,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 103 transitions, 857 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-01-31 16:08:54,556 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 605 flow [2024-01-31 16:08:54,556 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} [2024-01-31 16:08:54,556 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 35 predicate places. [2024-01-31 16:08:54,556 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 605 flow [2024-01-31 16:08:54,557 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) [2024-01-31 16:08:54,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:54,557 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] [2024-01-31 16:08:54,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-31 16:08:54,770 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 [2024-01-31 16:08:54,771 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:54,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:54,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2011535135, now seen corresponding path program 2 times [2024-01-31 16:08:54,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:54,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991259937] [2024-01-31 16:08:54,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:54,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:54,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:54,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991259937] [2024-01-31 16:08:54,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991259937] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:08:54,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951336195] [2024-01-31 16:08:54,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:08:54,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:08:54,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:08:54,919 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) [2024-01-31 16:08:54,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 16:08:54,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:08:54,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:08:54,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:08:54,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:08:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:55,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:08:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:55,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951336195] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:08:55,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:08:55,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-01-31 16:08:55,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432524273] [2024-01-31 16:08:55,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:08:55,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 16:08:55,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:55,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 16:08:55,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:08:55,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-31 16:08:55,244 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) [2024-01-31 16:08:55,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:55,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-31 16:08:55,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:55,465 INFO L124 PetriNetUnfolderBase]: 535/982 cut-off events. [2024-01-31 16:08:55,466 INFO L125 PetriNetUnfolderBase]: For 2733/2765 co-relation queries the response was YES. [2024-01-31 16:08:55,468 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. [2024-01-31 16:08:55,471 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 79 selfloop transitions, 44 changer transitions 7/140 dead transitions. [2024-01-31 16:08:55,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 140 transitions, 1265 flow [2024-01-31 16:08:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:08:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:08:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-01-31 16:08:55,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-01-31 16:08:55,472 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 605 flow. Second operand 10 states and 230 transitions. [2024-01-31 16:08:55,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 140 transitions, 1265 flow [2024-01-31 16:08:55,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 140 transitions, 1230 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-31 16:08:55,479 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 955 flow [2024-01-31 16:08:55,479 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} [2024-01-31 16:08:55,480 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 43 predicate places. [2024-01-31 16:08:55,480 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 955 flow [2024-01-31 16:08:55,480 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) [2024-01-31 16:08:55,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:55,480 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] [2024-01-31 16:08:55,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 16:08:55,692 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 [2024-01-31 16:08:55,692 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:55,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:55,693 INFO L85 PathProgramCache]: Analyzing trace with hash 98742361, now seen corresponding path program 3 times [2024-01-31 16:08:55,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:55,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141588751] [2024-01-31 16:08:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:55,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:55,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141588751] [2024-01-31 16:08:55,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141588751] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:08:55,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509729414] [2024-01-31 16:08:55,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:08:55,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:08:55,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:08:55,848 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) [2024-01-31 16:08:55,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 16:08:55,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:08:55,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:08:55,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 16:08:55,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:08:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:56,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:08:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:56,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509729414] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:08:56,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:08:56,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-01-31 16:08:56,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712228944] [2024-01-31 16:08:56,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:08:56,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 16:08:56,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:56,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 16:08:56,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:08:56,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-01-31 16:08:56,139 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) [2024-01-31 16:08:56,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:08:56,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-01-31 16:08:56,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:08:56,483 INFO L124 PetriNetUnfolderBase]: 672/1244 cut-off events. [2024-01-31 16:08:56,483 INFO L125 PetriNetUnfolderBase]: For 4735/4785 co-relation queries the response was YES. [2024-01-31 16:08:56,486 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. [2024-01-31 16:08:56,490 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 96 selfloop transitions, 67 changer transitions 11/184 dead transitions. [2024-01-31 16:08:56,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 184 transitions, 1822 flow [2024-01-31 16:08:56,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:08:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:08:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 318 transitions. [2024-01-31 16:08:56,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138996138996139 [2024-01-31 16:08:56,492 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 955 flow. Second operand 14 states and 318 transitions. [2024-01-31 16:08:56,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 184 transitions, 1822 flow [2024-01-31 16:08:56,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 184 transitions, 1801 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-31 16:08:56,503 INFO L231 Difference]: Finished difference. Result has 96 places, 112 transitions, 1364 flow [2024-01-31 16:08:56,504 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} [2024-01-31 16:08:56,504 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 57 predicate places. [2024-01-31 16:08:56,504 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 112 transitions, 1364 flow [2024-01-31 16:08:56,505 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) [2024-01-31 16:08:56,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:08:56,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:08:56,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 16:08:56,716 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 [2024-01-31 16:08:56,716 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:08:56,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:08:56,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2116634416, now seen corresponding path program 1 times [2024-01-31 16:08:56,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:08:56,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797269718] [2024-01-31 16:08:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:56,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:08:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:57,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:08:57,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797269718] [2024-01-31 16:08:57,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797269718] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:08:57,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175443476] [2024-01-31 16:08:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:08:57,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:08:57,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:08:57,176 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) [2024-01-31 16:08:57,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 16:08:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:08:57,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:08:57,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:08:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:57,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:08:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:08:57,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175443476] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:08:57,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:08:57,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-01-31 16:08:57,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243977625] [2024-01-31 16:08:57,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:08:57,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:08:57,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:08:57,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:08:57,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:09:02,702 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 [] [2024-01-31 16:09:02,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-31 16:09:02,865 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) [2024-01-31 16:09:02,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:09:02,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-31 16:09:02,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:09:04,555 INFO L124 PetriNetUnfolderBase]: 1062/1895 cut-off events. [2024-01-31 16:09:04,555 INFO L125 PetriNetUnfolderBase]: For 7475/7475 co-relation queries the response was YES. [2024-01-31 16:09:04,559 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. [2024-01-31 16:09:04,566 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 166 selfloop transitions, 122 changer transitions 40/331 dead transitions. [2024-01-31 16:09:04,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 331 transitions, 3280 flow [2024-01-31 16:09:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-31 16:09:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-31 16:09:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 650 transitions. [2024-01-31 16:09:04,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487987987987988 [2024-01-31 16:09:04,569 INFO L175 Difference]: Start difference. First operand has 96 places, 112 transitions, 1364 flow. Second operand 36 states and 650 transitions. [2024-01-31 16:09:04,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 331 transitions, 3280 flow [2024-01-31 16:09:04,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 331 transitions, 3230 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-01-31 16:09:04,593 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 2365 flow [2024-01-31 16:09:04,594 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} [2024-01-31 16:09:04,594 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 102 predicate places. [2024-01-31 16:09:04,594 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 2365 flow [2024-01-31 16:09:04,594 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) [2024-01-31 16:09:04,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:09:04,595 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] [2024-01-31 16:09:04,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-31 16:09:04,795 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 [2024-01-31 16:09:04,796 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:09:04,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:09:04,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1898364844, now seen corresponding path program 2 times [2024-01-31 16:09:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:09:04,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193182259] [2024-01-31 16:09:04,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:09:04,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:09:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:09:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:05,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:09:05,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193182259] [2024-01-31 16:09:05,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193182259] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:09:05,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551078869] [2024-01-31 16:09:05,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:09:05,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:09:05,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:09:05,411 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) [2024-01-31 16:09:05,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 16:09:05,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:09:05,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:09:05,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:09:05,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:09:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:05,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:09:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551078869] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:09:06,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:09:06,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-01-31 16:09:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580325061] [2024-01-31 16:09:06,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:09:06,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:09:06,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:09:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:09:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:09:06,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:09:06,911 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) [2024-01-31 16:09:06,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:09:06,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:09:06,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:09:10,279 INFO L124 PetriNetUnfolderBase]: 1379/2489 cut-off events. [2024-01-31 16:09:10,279 INFO L125 PetriNetUnfolderBase]: For 16105/16105 co-relation queries the response was YES. [2024-01-31 16:09:10,286 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. [2024-01-31 16:09:10,296 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 197 selfloop transitions, 230 changer transitions 32/462 dead transitions. [2024-01-31 16:09:10,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 462 transitions, 5764 flow [2024-01-31 16:09:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-31 16:09:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-31 16:09:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 896 transitions. [2024-01-31 16:09:10,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045045045045045 [2024-01-31 16:09:10,300 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 2365 flow. Second operand 48 states and 896 transitions. [2024-01-31 16:09:10,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 462 transitions, 5764 flow [2024-01-31 16:09:10,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 462 transitions, 5578 flow, removed 61 selfloop flow, removed 15 redundant places. [2024-01-31 16:09:10,360 INFO L231 Difference]: Finished difference. Result has 188 places, 278 transitions, 4737 flow [2024-01-31 16:09:10,376 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} [2024-01-31 16:09:10,377 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 149 predicate places. [2024-01-31 16:09:10,377 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 278 transitions, 4737 flow [2024-01-31 16:09:10,377 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) [2024-01-31 16:09:10,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:09:10,377 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] [2024-01-31 16:09:10,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 16:09:10,599 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 [2024-01-31 16:09:10,600 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:09:10,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:09:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 409334700, now seen corresponding path program 3 times [2024-01-31 16:09:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:09:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950352587] [2024-01-31 16:09:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:09:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:09:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:09:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:09:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950352587] [2024-01-31 16:09:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950352587] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:09:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730962483] [2024-01-31 16:09:11,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:09:11,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:09:11,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:09:11,203 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) [2024-01-31 16:09:11,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 16:09:11,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:09:11,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:09:11,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:09:11,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:09:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:11,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:09:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:12,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730962483] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:09:12,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:09:12,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-01-31 16:09:12,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040134224] [2024-01-31 16:09:12,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:09:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 16:09:12,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:09:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 16:09:12,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2024-01-31 16:09:13,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:09:13,396 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) [2024-01-31 16:09:13,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:09:13,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:09:13,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:09:16,971 INFO L124 PetriNetUnfolderBase]: 1436/2571 cut-off events. [2024-01-31 16:09:16,972 INFO L125 PetriNetUnfolderBase]: For 25991/25991 co-relation queries the response was YES. [2024-01-31 16:09:16,981 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. [2024-01-31 16:09:16,993 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 207 selfloop transitions, 258 changer transitions 21/489 dead transitions. [2024-01-31 16:09:16,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 489 transitions, 7158 flow [2024-01-31 16:09:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-31 16:09:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-31 16:09:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 910 transitions. [2024-01-31 16:09:16,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019305019305019 [2024-01-31 16:09:16,996 INFO L175 Difference]: Start difference. First operand has 188 places, 278 transitions, 4737 flow. Second operand 49 states and 910 transitions. [2024-01-31 16:09:16,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 489 transitions, 7158 flow [2024-01-31 16:09:17,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 489 transitions, 6730 flow, removed 163 selfloop flow, removed 14 redundant places. [2024-01-31 16:09:17,121 INFO L231 Difference]: Finished difference. Result has 224 places, 313 transitions, 5739 flow [2024-01-31 16:09:17,122 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} [2024-01-31 16:09:17,122 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 185 predicate places. [2024-01-31 16:09:17,122 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 313 transitions, 5739 flow [2024-01-31 16:09:17,122 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) [2024-01-31 16:09:17,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:09:17,122 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] [2024-01-31 16:09:17,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 16:09:17,334 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 [2024-01-31 16:09:17,334 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:09:17,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:09:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1070504100, now seen corresponding path program 4 times [2024-01-31 16:09:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:09:17,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915623059] [2024-01-31 16:09:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:09:17,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:09:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:09:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:17,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:09:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915623059] [2024-01-31 16:09:17,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915623059] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:09:17,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91382642] [2024-01-31 16:09:17,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:09:17,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:09:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:09:17,851 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) [2024-01-31 16:09:17,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 16:09:17,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:09:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:09:17,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:09:17,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:09:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:18,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:09:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:18,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91382642] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:09:18,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:09:18,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2024-01-31 16:09:18,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597529265] [2024-01-31 16:09:18,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:09:18,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:09:18,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:09:18,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:09:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:09:19,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:09:19,254 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) [2024-01-31 16:09:19,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:09:19,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:09:19,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:09:21,771 INFO L124 PetriNetUnfolderBase]: 1420/2547 cut-off events. [2024-01-31 16:09:21,771 INFO L125 PetriNetUnfolderBase]: For 29649/29649 co-relation queries the response was YES. [2024-01-31 16:09:21,785 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. [2024-01-31 16:09:21,799 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 171 selfloop transitions, 246 changer transitions 15/435 dead transitions. [2024-01-31 16:09:21,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 435 transitions, 7137 flow [2024-01-31 16:09:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:09:21,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:09:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 639 transitions. [2024-01-31 16:09:21,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934362934362934 [2024-01-31 16:09:21,802 INFO L175 Difference]: Start difference. First operand has 224 places, 313 transitions, 5739 flow. Second operand 35 states and 639 transitions. [2024-01-31 16:09:21,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 435 transitions, 7137 flow [2024-01-31 16:09:22,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 435 transitions, 6819 flow, removed 71 selfloop flow, removed 25 redundant places. [2024-01-31 16:09:22,080 INFO L231 Difference]: Finished difference. Result has 236 places, 317 transitions, 6264 flow [2024-01-31 16:09:22,080 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} [2024-01-31 16:09:22,081 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 197 predicate places. [2024-01-31 16:09:22,081 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 317 transitions, 6264 flow [2024-01-31 16:09:22,081 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) [2024-01-31 16:09:22,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:09:22,081 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] [2024-01-31 16:09:22,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 16:09:22,292 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 [2024-01-31 16:09:22,293 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:09:22,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:09:22,293 INFO L85 PathProgramCache]: Analyzing trace with hash -622205356, now seen corresponding path program 4 times [2024-01-31 16:09:22,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:09:22,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737186723] [2024-01-31 16:09:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:09:22,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:09:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:09:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:22,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:09:22,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737186723] [2024-01-31 16:09:22,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737186723] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:09:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744533609] [2024-01-31 16:09:22,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:09:22,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:09:22,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:09:22,435 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) [2024-01-31 16:09:22,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 16:09:22,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:09:22,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:09:22,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 16:09:22,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:09:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:22,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:09:26,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:26,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744533609] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:09:26,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:09:26,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2024-01-31 16:09:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165109025] [2024-01-31 16:09:26,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:09:26,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 16:09:26,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:09:26,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 16:09:26,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=205, Unknown=1, NotChecked=0, Total=272 [2024-01-31 16:09:30,986 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] [2024-01-31 16:09:35,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-01-31 16:09:39,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-01-31 16:09:43,662 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] [2024-01-31 16:09:43,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-01-31 16:09:43,663 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) [2024-01-31 16:09:43,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:09:43,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-01-31 16:09:43,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:09:44,892 INFO L124 PetriNetUnfolderBase]: 1307/2401 cut-off events. [2024-01-31 16:09:44,893 INFO L125 PetriNetUnfolderBase]: For 33952/33986 co-relation queries the response was YES. [2024-01-31 16:09:44,902 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. [2024-01-31 16:09:44,912 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 162 selfloop transitions, 147 changer transitions 37/388 dead transitions. [2024-01-31 16:09:44,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 388 transitions, 7418 flow [2024-01-31 16:09:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 16:09:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 16:09:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 252 transitions. [2024-01-31 16:09:44,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-01-31 16:09:44,918 INFO L175 Difference]: Start difference. First operand has 236 places, 317 transitions, 6264 flow. Second operand 14 states and 252 transitions. [2024-01-31 16:09:44,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 388 transitions, 7418 flow [2024-01-31 16:09:45,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 388 transitions, 7299 flow, removed 3 selfloop flow, removed 29 redundant places. [2024-01-31 16:09:45,139 INFO L231 Difference]: Finished difference. Result has 222 places, 313 transitions, 6398 flow [2024-01-31 16:09:45,139 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} [2024-01-31 16:09:45,139 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 183 predicate places. [2024-01-31 16:09:45,139 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 313 transitions, 6398 flow [2024-01-31 16:09:45,139 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) [2024-01-31 16:09:45,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:09:45,140 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] [2024-01-31 16:09:45,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-31 16:09:45,340 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 [2024-01-31 16:09:45,340 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:09:45,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:09:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1349797334, now seen corresponding path program 5 times [2024-01-31 16:09:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:09:45,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876341218] [2024-01-31 16:09:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:09:45,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:09:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:09:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:46,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:09:46,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876341218] [2024-01-31 16:09:46,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876341218] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:09:46,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973910491] [2024-01-31 16:09:46,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:09:46,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:09:46,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:09:46,084 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) [2024-01-31 16:09:46,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 16:09:46,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:09:46,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:09:46,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:09:46,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:09:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:46,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:09:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:47,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973910491] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:09:47,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:09:47,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:09:47,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319637794] [2024-01-31 16:09:47,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:09:47,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:09:47,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:09:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:09:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:09:48,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:09:48,863 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) [2024-01-31 16:09:48,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:09:48,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:09:48,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:09:53,895 INFO L124 PetriNetUnfolderBase]: 1820/3261 cut-off events. [2024-01-31 16:09:53,895 INFO L125 PetriNetUnfolderBase]: For 48084/48084 co-relation queries the response was YES. [2024-01-31 16:09:53,907 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. [2024-01-31 16:09:53,922 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 208 selfloop transitions, 354 changer transitions 15/580 dead transitions. [2024-01-31 16:09:53,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 580 transitions, 11288 flow [2024-01-31 16:09:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:09:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:09:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 690 transitions. [2024-01-31 16:09:53,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504017531044558 [2024-01-31 16:09:53,927 INFO L175 Difference]: Start difference. First operand has 222 places, 313 transitions, 6398 flow. Second operand 37 states and 690 transitions. [2024-01-31 16:09:53,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 580 transitions, 11288 flow [2024-01-31 16:09:54,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 580 transitions, 11102 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-01-31 16:09:54,162 INFO L231 Difference]: Finished difference. Result has 260 places, 451 transitions, 10596 flow [2024-01-31 16:09:54,162 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} [2024-01-31 16:09:54,162 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 221 predicate places. [2024-01-31 16:09:54,162 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 451 transitions, 10596 flow [2024-01-31 16:09:54,163 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) [2024-01-31 16:09:54,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:09:54,163 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] [2024-01-31 16:09:54,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-31 16:09:54,363 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 [2024-01-31 16:09:54,363 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:09:54,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:09:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash 226552458, now seen corresponding path program 6 times [2024-01-31 16:09:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:09:54,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759799053] [2024-01-31 16:09:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:09:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:09:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:09:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:54,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:09:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759799053] [2024-01-31 16:09:54,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759799053] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:09:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207994121] [2024-01-31 16:09:54,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:09:54,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:09:54,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:09:54,967 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) [2024-01-31 16:09:54,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 16:09:55,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:09:55,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:09:55,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:09:55,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:09:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:55,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:09:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:09:56,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207994121] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:09:56,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:09:56,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-01-31 16:09:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927654031] [2024-01-31 16:09:56,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:09:56,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:09:56,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:09:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:09:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:09:57,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:09:57,796 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) [2024-01-31 16:09:57,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:09:57,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:09:57,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:00,682 INFO L124 PetriNetUnfolderBase]: 1935/3466 cut-off events. [2024-01-31 16:10:00,682 INFO L125 PetriNetUnfolderBase]: For 60562/60562 co-relation queries the response was YES. [2024-01-31 16:10:00,697 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. [2024-01-31 16:10:00,711 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 212 selfloop transitions, 344 changer transitions 14/573 dead transitions. [2024-01-31 16:10:00,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 573 transitions, 13119 flow [2024-01-31 16:10:00,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 16:10:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 16:10:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 473 transitions. [2024-01-31 16:10:00,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47347347347347346 [2024-01-31 16:10:00,713 INFO L175 Difference]: Start difference. First operand has 260 places, 451 transitions, 10596 flow. Second operand 27 states and 473 transitions. [2024-01-31 16:10:00,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 573 transitions, 13119 flow [2024-01-31 16:10:01,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 573 transitions, 12703 flow, removed 185 selfloop flow, removed 6 redundant places. [2024-01-31 16:10:01,156 INFO L231 Difference]: Finished difference. Result has 290 places, 504 transitions, 12607 flow [2024-01-31 16:10:01,157 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} [2024-01-31 16:10:01,157 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 251 predicate places. [2024-01-31 16:10:01,157 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 504 transitions, 12607 flow [2024-01-31 16:10:01,157 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) [2024-01-31 16:10:01,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:01,158 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] [2024-01-31 16:10:01,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 16:10:01,363 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 [2024-01-31 16:10:01,364 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:10:01,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1942170012, now seen corresponding path program 7 times [2024-01-31 16:10:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:01,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255096773] [2024-01-31 16:10:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:02,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:02,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255096773] [2024-01-31 16:10:02,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255096773] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:02,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029762473] [2024-01-31 16:10:02,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:10:02,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:02,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:02,064 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) [2024-01-31 16:10:02,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 16:10:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:02,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:10:02,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:02,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:03,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029762473] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:03,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:03,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:10:03,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632276250] [2024-01-31 16:10:03,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:03,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:10:03,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:03,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:10:03,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:10:05,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:10:05,184 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) [2024-01-31 16:10:05,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:05,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:10:05,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:12,765 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 [] [2024-01-31 16:10:13,782 INFO L124 PetriNetUnfolderBase]: 2317/4180 cut-off events. [2024-01-31 16:10:13,782 INFO L125 PetriNetUnfolderBase]: For 82932/82932 co-relation queries the response was YES. [2024-01-31 16:10:13,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36662 conditions, 4180 events. 2317/4180 cut-off events. For 82932/82932 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28080 event pairs, 259 based on Foata normal form. 2/4181 useless extension candidates. Maximal degree in co-relation 36558. Up to 1989 conditions per place. [2024-01-31 16:10:13,820 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 251 selfloop transitions, 460 changer transitions 15/729 dead transitions. [2024-01-31 16:10:13,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 729 transitions, 17387 flow [2024-01-31 16:10:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:10:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:10:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 662 transitions. [2024-01-31 16:10:13,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111969111969112 [2024-01-31 16:10:13,823 INFO L175 Difference]: Start difference. First operand has 290 places, 504 transitions, 12607 flow. Second operand 35 states and 662 transitions. [2024-01-31 16:10:13,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 729 transitions, 17387 flow [2024-01-31 16:10:14,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 729 transitions, 17100 flow, removed 61 selfloop flow, removed 9 redundant places. [2024-01-31 16:10:14,494 INFO L231 Difference]: Finished difference. Result has 331 places, 596 transitions, 16631 flow [2024-01-31 16:10:14,494 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=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=16631, PETRI_PLACES=331, PETRI_TRANSITIONS=596} [2024-01-31 16:10:14,494 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 292 predicate places. [2024-01-31 16:10:14,494 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 596 transitions, 16631 flow [2024-01-31 16:10:14,495 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) [2024-01-31 16:10:14,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:14,495 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] [2024-01-31 16:10:14,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-01-31 16:10:14,695 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 [2024-01-31 16:10:14,696 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:10:14,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash -486464726, now seen corresponding path program 8 times [2024-01-31 16:10:14,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:14,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831050680] [2024-01-31 16:10:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:14,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:15,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:15,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831050680] [2024-01-31 16:10:15,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831050680] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:15,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639439742] [2024-01-31 16:10:15,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:10:15,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:15,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:15,311 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) [2024-01-31 16:10:15,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 16:10:15,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:10:15,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:15,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:10:15,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:15,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:16,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639439742] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:16,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:16,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:10:16,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511158528] [2024-01-31 16:10:16,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:16,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:10:16,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:16,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:10:16,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:10:17,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:10:17,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 596 transitions, 16631 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) [2024-01-31 16:10:17,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:17,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:10:17,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:22,002 INFO L124 PetriNetUnfolderBase]: 2725/4951 cut-off events. [2024-01-31 16:10:22,002 INFO L125 PetriNetUnfolderBase]: For 137143/137143 co-relation queries the response was YES. [2024-01-31 16:10:22,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47795 conditions, 4951 events. 2725/4951 cut-off events. For 137143/137143 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 34819 event pairs, 313 based on Foata normal form. 2/4952 useless extension candidates. Maximal degree in co-relation 47675. Up to 2556 conditions per place. [2024-01-31 16:10:22,051 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 285 selfloop transitions, 517 changer transitions 16/821 dead transitions. [2024-01-31 16:10:22,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 821 transitions, 22378 flow [2024-01-31 16:10:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:10:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:10:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 669 transitions. [2024-01-31 16:10:22,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48867786705624544 [2024-01-31 16:10:22,053 INFO L175 Difference]: Start difference. First operand has 331 places, 596 transitions, 16631 flow. Second operand 37 states and 669 transitions. [2024-01-31 16:10:22,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 821 transitions, 22378 flow [2024-01-31 16:10:23,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 821 transitions, 22166 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-01-31 16:10:23,140 INFO L231 Difference]: Finished difference. Result has 374 places, 710 transitions, 21812 flow [2024-01-31 16:10:23,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=16455, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=21812, PETRI_PLACES=374, PETRI_TRANSITIONS=710} [2024-01-31 16:10:23,141 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 335 predicate places. [2024-01-31 16:10:23,141 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 710 transitions, 21812 flow [2024-01-31 16:10:23,141 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) [2024-01-31 16:10:23,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:23,142 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] [2024-01-31 16:10:23,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 16:10:23,342 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 [2024-01-31 16:10:23,342 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:10:23,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:23,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1933695804, now seen corresponding path program 9 times [2024-01-31 16:10:23,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:23,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495923117] [2024-01-31 16:10:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:23,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:24,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:24,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495923117] [2024-01-31 16:10:24,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495923117] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:24,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3331676] [2024-01-31 16:10:24,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:10:24,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:24,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:24,153 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) [2024-01-31 16:10:24,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 16:10:24,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:10:24,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:24,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:10:24,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:24,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:25,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3331676] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:25,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:25,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:10:25,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742956222] [2024-01-31 16:10:25,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:25,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:10:25,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:10:25,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:10:26,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:10:26,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 710 transitions, 21812 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) [2024-01-31 16:10:26,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:26,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:10:26,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:32,401 INFO L124 PetriNetUnfolderBase]: 3019/5506 cut-off events. [2024-01-31 16:10:32,401 INFO L125 PetriNetUnfolderBase]: For 188194/188194 co-relation queries the response was YES. [2024-01-31 16:10:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58139 conditions, 5506 events. 3019/5506 cut-off events. For 188194/188194 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 39800 event pairs, 303 based on Foata normal form. 2/5507 useless extension candidates. Maximal degree in co-relation 58005. Up to 2634 conditions per place. [2024-01-31 16:10:32,456 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 298 selfloop transitions, 614 changer transitions 14/929 dead transitions. [2024-01-31 16:10:32,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 929 transitions, 27446 flow [2024-01-31 16:10:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-31 16:10:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-31 16:10:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 754 transitions. [2024-01-31 16:10:32,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094594594594595 [2024-01-31 16:10:32,458 INFO L175 Difference]: Start difference. First operand has 374 places, 710 transitions, 21812 flow. Second operand 40 states and 754 transitions. [2024-01-31 16:10:32,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 929 transitions, 27446 flow [2024-01-31 16:10:34,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 929 transitions, 26998 flow, removed 172 selfloop flow, removed 12 redundant places. [2024-01-31 16:10:34,038 INFO L231 Difference]: Finished difference. Result has 411 places, 790 transitions, 26223 flow [2024-01-31 16:10:34,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=21456, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=536, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=26223, PETRI_PLACES=411, PETRI_TRANSITIONS=790} [2024-01-31 16:10:34,039 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 372 predicate places. [2024-01-31 16:10:34,039 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 790 transitions, 26223 flow [2024-01-31 16:10:34,039 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) [2024-01-31 16:10:34,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:34,040 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] [2024-01-31 16:10:34,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 16:10:34,250 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 [2024-01-31 16:10:34,250 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:10:34,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:34,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1331329738, now seen corresponding path program 10 times [2024-01-31 16:10:34,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:34,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067839086] [2024-01-31 16:10:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:34,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:34,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067839086] [2024-01-31 16:10:34,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067839086] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:34,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142314950] [2024-01-31 16:10:34,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:10:34,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:34,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:34,804 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) [2024-01-31 16:10:34,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 16:10:34,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:10:34,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:34,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:10:34,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:35,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:36,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142314950] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:36,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:36,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-01-31 16:10:36,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522021406] [2024-01-31 16:10:36,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:36,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:10:36,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:36,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:10:36,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:10:37,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:10:37,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 790 transitions, 26223 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) [2024-01-31 16:10:37,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:37,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:10:37,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:41,495 INFO L124 PetriNetUnfolderBase]: 3013/5495 cut-off events. [2024-01-31 16:10:41,496 INFO L125 PetriNetUnfolderBase]: For 218666/218666 co-relation queries the response was YES. [2024-01-31 16:10:41,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61659 conditions, 5495 events. 3013/5495 cut-off events. For 218666/218666 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 39639 event pairs, 391 based on Foata normal form. 3/5497 useless extension candidates. Maximal degree in co-relation 61516. Up to 3617 conditions per place. [2024-01-31 16:10:41,556 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 309 selfloop transitions, 527 changer transitions 14/853 dead transitions. [2024-01-31 16:10:41,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 853 transitions, 28330 flow [2024-01-31 16:10:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:10:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:10:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 427 transitions. [2024-01-31 16:10:41,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48085585585585583 [2024-01-31 16:10:41,558 INFO L175 Difference]: Start difference. First operand has 411 places, 790 transitions, 26223 flow. Second operand 24 states and 427 transitions. [2024-01-31 16:10:41,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 853 transitions, 28330 flow [2024-01-31 16:10:43,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 853 transitions, 27933 flow, removed 132 selfloop flow, removed 13 redundant places. [2024-01-31 16:10:43,555 INFO L231 Difference]: Finished difference. Result has 425 places, 793 transitions, 27694 flow [2024-01-31 16:10:43,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=25826, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=524, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=27694, PETRI_PLACES=425, PETRI_TRANSITIONS=793} [2024-01-31 16:10:43,556 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 386 predicate places. [2024-01-31 16:10:43,556 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 793 transitions, 27694 flow [2024-01-31 16:10:43,556 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) [2024-01-31 16:10:43,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:43,557 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] [2024-01-31 16:10:43,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 16:10:43,757 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 [2024-01-31 16:10:43,757 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:10:43,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:43,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1235353002, now seen corresponding path program 11 times [2024-01-31 16:10:43,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:43,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986285171] [2024-01-31 16:10:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:43,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986285171] [2024-01-31 16:10:44,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986285171] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:44,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562876655] [2024-01-31 16:10:44,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:10:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:44,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:44,258 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) [2024-01-31 16:10:44,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 16:10:44,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:10:44,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:44,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:10:44,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:44,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:45,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562876655] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:45,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:45,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:10:45,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532501626] [2024-01-31 16:10:45,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:45,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:10:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:45,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:10:45,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:10:46,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:10:46,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 793 transitions, 27694 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) [2024-01-31 16:10:46,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:46,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:10:46,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:10:50,772 INFO L124 PetriNetUnfolderBase]: 3109/5674 cut-off events. [2024-01-31 16:10:50,772 INFO L125 PetriNetUnfolderBase]: For 251979/251979 co-relation queries the response was YES. [2024-01-31 16:10:50,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66950 conditions, 5674 events. 3109/5674 cut-off events. For 251979/251979 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 41274 event pairs, 335 based on Foata normal form. 5/5678 useless extension candidates. Maximal degree in co-relation 66805. Up to 3380 conditions per place. [2024-01-31 16:10:50,836 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 319 selfloop transitions, 557 changer transitions 14/893 dead transitions. [2024-01-31 16:10:50,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 893 transitions, 30582 flow [2024-01-31 16:10:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 16:10:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 16:10:50,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 520 transitions. [2024-01-31 16:10:50,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019305019305019 [2024-01-31 16:10:50,837 INFO L175 Difference]: Start difference. First operand has 425 places, 793 transitions, 27694 flow. Second operand 28 states and 520 transitions. [2024-01-31 16:10:50,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 893 transitions, 30582 flow [2024-01-31 16:10:53,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 893 transitions, 30504 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-01-31 16:10:53,122 INFO L231 Difference]: Finished difference. Result has 443 places, 806 transitions, 30025 flow [2024-01-31 16:10:53,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=27616, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=544, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30025, PETRI_PLACES=443, PETRI_TRANSITIONS=806} [2024-01-31 16:10:53,124 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 404 predicate places. [2024-01-31 16:10:53,124 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 806 transitions, 30025 flow [2024-01-31 16:10:53,124 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) [2024-01-31 16:10:53,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:10:53,124 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] [2024-01-31 16:10:53,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 16:10:53,335 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 [2024-01-31 16:10:53,335 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:10:53,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:10:53,336 INFO L85 PathProgramCache]: Analyzing trace with hash 134148272, now seen corresponding path program 12 times [2024-01-31 16:10:53,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:10:53,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897271908] [2024-01-31 16:10:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:10:53,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:10:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:10:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:54,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:10:54,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897271908] [2024-01-31 16:10:54,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897271908] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:10:54,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481048279] [2024-01-31 16:10:54,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:10:54,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:10:54,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:10:54,013 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) [2024-01-31 16:10:54,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 16:10:54,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 16:10:54,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:10:54,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:10:54,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:10:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:54,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:10:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:10:55,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481048279] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:10:55,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:10:55,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:10:55,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675908448] [2024-01-31 16:10:55,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:10:55,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:10:55,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:10:55,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:10:55,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:10:57,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-31 16:10:58,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:10:58,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 806 transitions, 30025 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) [2024-01-31 16:10:58,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:10:58,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:10:58,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:03,968 INFO L124 PetriNetUnfolderBase]: 3166/5785 cut-off events. [2024-01-31 16:11:03,969 INFO L125 PetriNetUnfolderBase]: For 312399/312399 co-relation queries the response was YES. [2024-01-31 16:11:04,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71933 conditions, 5785 events. 3166/5785 cut-off events. For 312399/312399 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 42071 event pairs, 353 based on Foata normal form. 5/5789 useless extension candidates. Maximal degree in co-relation 71782. Up to 3039 conditions per place. [2024-01-31 16:11:04,181 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 290 selfloop transitions, 633 changer transitions 17/943 dead transitions. [2024-01-31 16:11:04,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 943 transitions, 33582 flow [2024-01-31 16:11:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-31 16:11:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-31 16:11:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 719 transitions. [2024-01-31 16:11:04,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858108108108108 [2024-01-31 16:11:04,183 INFO L175 Difference]: Start difference. First operand has 443 places, 806 transitions, 30025 flow. Second operand 40 states and 719 transitions. [2024-01-31 16:11:04,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 943 transitions, 33582 flow [2024-01-31 16:11:06,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 943 transitions, 33419 flow, removed 33 selfloop flow, removed 15 redundant places. [2024-01-31 16:11:06,497 INFO L231 Difference]: Finished difference. Result has 472 places, 828 transitions, 32775 flow [2024-01-31 16:11:06,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=29875, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=612, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=32775, PETRI_PLACES=472, PETRI_TRANSITIONS=828} [2024-01-31 16:11:06,498 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 433 predicate places. [2024-01-31 16:11:06,498 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 828 transitions, 32775 flow [2024-01-31 16:11:06,498 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) [2024-01-31 16:11:06,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:06,498 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] [2024-01-31 16:11:06,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-01-31 16:11:06,698 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 [2024-01-31 16:11:06,699 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:11:06,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:06,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1117688492, now seen corresponding path program 13 times [2024-01-31 16:11:06,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:06,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915426323] [2024-01-31 16:11:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:06,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:07,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:07,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915426323] [2024-01-31 16:11:07,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915426323] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:07,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378882644] [2024-01-31 16:11:07,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:11:07,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:07,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:07,379 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) [2024-01-31 16:11:07,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 16:11:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:07,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:11:07,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:07,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:07,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378882644] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:08,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:08,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:11:08,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767431084] [2024-01-31 16:11:08,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:08,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:11:08,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:11:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:11:09,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:11:09,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 828 transitions, 32775 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) [2024-01-31 16:11:09,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:09,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:11:09,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:14,670 INFO L124 PetriNetUnfolderBase]: 3124/5684 cut-off events. [2024-01-31 16:11:14,671 INFO L125 PetriNetUnfolderBase]: For 328027/328027 co-relation queries the response was YES. [2024-01-31 16:11:14,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75111 conditions, 5684 events. 3124/5684 cut-off events. For 328027/328027 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 41104 event pairs, 321 based on Foata normal form. 4/5687 useless extension candidates. Maximal degree in co-relation 74955. Up to 3360 conditions per place. [2024-01-31 16:11:14,748 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 339 selfloop transitions, 582 changer transitions 12/936 dead transitions. [2024-01-31 16:11:14,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 936 transitions, 35210 flow [2024-01-31 16:11:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 16:11:14,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 16:11:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 619 transitions. [2024-01-31 16:11:14,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506961506961507 [2024-01-31 16:11:14,750 INFO L175 Difference]: Start difference. First operand has 472 places, 828 transitions, 32775 flow. Second operand 33 states and 619 transitions. [2024-01-31 16:11:14,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 936 transitions, 35210 flow [2024-01-31 16:11:17,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 936 transitions, 34943 flow, removed 59 selfloop flow, removed 23 redundant places. [2024-01-31 16:11:17,901 INFO L231 Difference]: Finished difference. Result has 483 places, 830 transitions, 34457 flow [2024-01-31 16:11:17,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=32512, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=579, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=34457, PETRI_PLACES=483, PETRI_TRANSITIONS=830} [2024-01-31 16:11:17,902 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 444 predicate places. [2024-01-31 16:11:17,902 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 830 transitions, 34457 flow [2024-01-31 16:11:17,902 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) [2024-01-31 16:11:17,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:17,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:11:17,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:18,113 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 [2024-01-31 16:11:18,114 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:11:18,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:18,114 INFO L85 PathProgramCache]: Analyzing trace with hash -850530640, now seen corresponding path program 14 times [2024-01-31 16:11:18,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:18,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852770482] [2024-01-31 16:11:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:18,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:18,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:18,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852770482] [2024-01-31 16:11:18,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852770482] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:18,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930522053] [2024-01-31 16:11:18,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:11:18,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:18,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:18,717 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) [2024-01-31 16:11:18,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 16:11:18,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:11:18,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:18,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:11:18,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:19,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:20,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930522053] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:20,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:20,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:11:20,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184352592] [2024-01-31 16:11:20,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:20,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:11:20,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:20,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:11:20,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:11:21,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:11:21,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 830 transitions, 34457 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) [2024-01-31 16:11:21,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:21,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:11:21,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:27,555 INFO L124 PetriNetUnfolderBase]: 3164/5734 cut-off events. [2024-01-31 16:11:27,555 INFO L125 PetriNetUnfolderBase]: For 377297/377297 co-relation queries the response was YES. [2024-01-31 16:11:27,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79595 conditions, 5734 events. 3164/5734 cut-off events. For 377297/377297 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 41298 event pairs, 293 based on Foata normal form. 5/5738 useless extension candidates. Maximal degree in co-relation 79438. Up to 2688 conditions per place. [2024-01-31 16:11:27,627 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 318 selfloop transitions, 620 changer transitions 17/958 dead transitions. [2024-01-31 16:11:27,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 958 transitions, 37872 flow [2024-01-31 16:11:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:11:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:11:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 659 transitions. [2024-01-31 16:11:27,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088803088803089 [2024-01-31 16:11:27,629 INFO L175 Difference]: Start difference. First operand has 483 places, 830 transitions, 34457 flow. Second operand 35 states and 659 transitions. [2024-01-31 16:11:27,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 958 transitions, 37872 flow [2024-01-31 16:11:30,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 958 transitions, 37685 flow, removed 7 selfloop flow, removed 26 redundant places. [2024-01-31 16:11:30,959 INFO L231 Difference]: Finished difference. Result has 495 places, 849 transitions, 36817 flow [2024-01-31 16:11:30,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=34274, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=830, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=36817, PETRI_PLACES=495, PETRI_TRANSITIONS=849} [2024-01-31 16:11:30,961 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 456 predicate places. [2024-01-31 16:11:30,961 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 849 transitions, 36817 flow [2024-01-31 16:11:30,961 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) [2024-01-31 16:11:30,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:30,961 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] [2024-01-31 16:11:30,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:31,172 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 [2024-01-31 16:11:31,172 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:11:31,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:31,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1011614744, now seen corresponding path program 15 times [2024-01-31 16:11:31,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:31,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989383976] [2024-01-31 16:11:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:31,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:31,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:31,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989383976] [2024-01-31 16:11:31,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989383976] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:31,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476807119] [2024-01-31 16:11:31,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:11:31,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:31,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:31,714 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) [2024-01-31 16:11:31,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 16:11:31,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:11:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:31,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:11:31,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:32,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:33,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476807119] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:33,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:33,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:11:33,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072666318] [2024-01-31 16:11:33,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:33,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:11:33,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:33,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:11:33,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:11:34,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:11:34,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 849 transitions, 36817 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) [2024-01-31 16:11:34,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:34,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:11:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:39,905 INFO L124 PetriNetUnfolderBase]: 3146/5689 cut-off events. [2024-01-31 16:11:39,905 INFO L125 PetriNetUnfolderBase]: For 378077/378077 co-relation queries the response was YES. [2024-01-31 16:11:39,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82706 conditions, 5689 events. 3146/5689 cut-off events. For 378077/378077 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40810 event pairs, 329 based on Foata normal form. 2/5690 useless extension candidates. Maximal degree in co-relation 82548. Up to 3526 conditions per place. [2024-01-31 16:11:39,978 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 309 selfloop transitions, 602 changer transitions 14/928 dead transitions. [2024-01-31 16:11:39,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 928 transitions, 39148 flow [2024-01-31 16:11:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 16:11:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 16:11:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 579 transitions. [2024-01-31 16:11:39,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742014742014742 [2024-01-31 16:11:39,980 INFO L175 Difference]: Start difference. First operand has 495 places, 849 transitions, 36817 flow. Second operand 33 states and 579 transitions. [2024-01-31 16:11:39,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 928 transitions, 39148 flow [2024-01-31 16:11:43,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 928 transitions, 38703 flow, removed 78 selfloop flow, removed 22 redundant places. [2024-01-31 16:11:43,727 INFO L231 Difference]: Finished difference. Result has 508 places, 853 transitions, 38634 flow [2024-01-31 16:11:43,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=36389, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=598, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=38634, PETRI_PLACES=508, PETRI_TRANSITIONS=853} [2024-01-31 16:11:43,728 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 469 predicate places. [2024-01-31 16:11:43,728 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 853 transitions, 38634 flow [2024-01-31 16:11:43,729 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) [2024-01-31 16:11:43,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:43,729 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] [2024-01-31 16:11:43,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:43,937 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 [2024-01-31 16:11:43,938 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:11:43,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:43,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2115739236, now seen corresponding path program 16 times [2024-01-31 16:11:43,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:43,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81478864] [2024-01-31 16:11:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:43,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:44,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:44,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81478864] [2024-01-31 16:11:44,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81478864] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:44,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996602990] [2024-01-31 16:11:44,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:11:44,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:44,550 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) [2024-01-31 16:11:44,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 16:11:44,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:11:44,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:44,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:11:44,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:45,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:11:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:45,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996602990] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:11:45,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:11:45,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:11:45,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356929448] [2024-01-31 16:11:45,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:11:45,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:11:45,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:11:45,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:11:45,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:11:47,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:11:47,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 853 transitions, 38634 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) [2024-01-31 16:11:47,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:11:47,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:11:47,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:11:53,134 INFO L124 PetriNetUnfolderBase]: 3207/5797 cut-off events. [2024-01-31 16:11:53,134 INFO L125 PetriNetUnfolderBase]: For 444238/444238 co-relation queries the response was YES. [2024-01-31 16:11:53,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86824 conditions, 5797 events. 3207/5797 cut-off events. For 444238/444238 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 41599 event pairs, 315 based on Foata normal form. 4/5800 useless extension candidates. Maximal degree in co-relation 86675. Up to 2925 conditions per place. [2024-01-31 16:11:53,214 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 319 selfloop transitions, 628 changer transitions 16/966 dead transitions. [2024-01-31 16:11:53,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 966 transitions, 41760 flow [2024-01-31 16:11:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:11:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:11:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 638 transitions. [2024-01-31 16:11:53,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266409266409267 [2024-01-31 16:11:53,215 INFO L175 Difference]: Start difference. First operand has 508 places, 853 transitions, 38634 flow. Second operand 35 states and 638 transitions. [2024-01-31 16:11:53,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 966 transitions, 41760 flow [2024-01-31 16:11:57,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 966 transitions, 41590 flow, removed 11 selfloop flow, removed 21 redundant places. [2024-01-31 16:11:57,223 INFO L231 Difference]: Finished difference. Result has 525 places, 868 transitions, 41297 flow [2024-01-31 16:11:57,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=38464, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=613, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=41297, PETRI_PLACES=525, PETRI_TRANSITIONS=868} [2024-01-31 16:11:57,224 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 486 predicate places. [2024-01-31 16:11:57,224 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 868 transitions, 41297 flow [2024-01-31 16:11:57,224 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) [2024-01-31 16:11:57,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:11:57,225 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] [2024-01-31 16:11:57,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-31 16:11:57,425 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 [2024-01-31 16:11:57,425 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:11:57,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:11:57,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1430949122, now seen corresponding path program 17 times [2024-01-31 16:11:57,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:11:57,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361799316] [2024-01-31 16:11:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:11:57,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:11:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:11:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:57,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:11:57,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361799316] [2024-01-31 16:11:57,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361799316] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:11:57,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182637359] [2024-01-31 16:11:57,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:11:57,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:11:57,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:11:57,921 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) [2024-01-31 16:11:57,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 16:11:58,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:11:58,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:11:58,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:11:58,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:11:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:11:58,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:00,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182637359] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:00,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:00,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:12:00,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12761348] [2024-01-31 16:12:00,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:00,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:12:00,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:00,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:12:00,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:12:01,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:12:01,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 868 transitions, 41297 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) [2024-01-31 16:12:01,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:01,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:12:01,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:06,262 INFO L124 PetriNetUnfolderBase]: 3233/5842 cut-off events. [2024-01-31 16:12:06,262 INFO L125 PetriNetUnfolderBase]: For 499193/499193 co-relation queries the response was YES. [2024-01-31 16:12:06,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92165 conditions, 5842 events. 3233/5842 cut-off events. For 499193/499193 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 41955 event pairs, 347 based on Foata normal form. 2/5843 useless extension candidates. Maximal degree in co-relation 92002. Up to 3453 conditions per place. [2024-01-31 16:12:06,337 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 339 selfloop transitions, 603 changer transitions 14/959 dead transitions. [2024-01-31 16:12:06,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 959 transitions, 44050 flow [2024-01-31 16:12:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:12:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:12:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 558 transitions. [2024-01-31 16:12:06,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-01-31 16:12:06,339 INFO L175 Difference]: Start difference. First operand has 525 places, 868 transitions, 41297 flow. Second operand 31 states and 558 transitions. [2024-01-31 16:12:06,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 959 transitions, 44050 flow [2024-01-31 16:12:10,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 959 transitions, 43826 flow, removed 25 selfloop flow, removed 24 redundant places. [2024-01-31 16:12:10,903 INFO L231 Difference]: Finished difference. Result has 534 places, 874 transitions, 43321 flow [2024-01-31 16:12:10,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=41077, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=43321, PETRI_PLACES=534, PETRI_TRANSITIONS=874} [2024-01-31 16:12:10,905 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 495 predicate places. [2024-01-31 16:12:10,905 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 874 transitions, 43321 flow [2024-01-31 16:12:10,905 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) [2024-01-31 16:12:10,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:10,905 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] [2024-01-31 16:12:10,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:11,108 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 [2024-01-31 16:12:11,108 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:12:11,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:11,109 INFO L85 PathProgramCache]: Analyzing trace with hash -357701396, now seen corresponding path program 18 times [2024-01-31 16:12:11,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:11,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730711364] [2024-01-31 16:12:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:11,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:11,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730711364] [2024-01-31 16:12:11,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730711364] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063902964] [2024-01-31 16:12:11,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:12:11,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:11,621 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) [2024-01-31 16:12:11,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 16:12:11,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:12:11,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:11,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:12:11,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:12,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:13,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063902964] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:13,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:13,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-01-31 16:12:13,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653936239] [2024-01-31 16:12:13,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:13,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:12:13,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:13,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:12:13,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:12:14,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:12:14,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 874 transitions, 43321 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) [2024-01-31 16:12:14,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:14,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:12:14,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:19,556 INFO L124 PetriNetUnfolderBase]: 3284/5934 cut-off events. [2024-01-31 16:12:19,557 INFO L125 PetriNetUnfolderBase]: For 576506/576506 co-relation queries the response was YES. [2024-01-31 16:12:19,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97109 conditions, 5934 events. 3284/5934 cut-off events. For 576506/576506 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 42515 event pairs, 359 based on Foata normal form. 4/5937 useless extension candidates. Maximal degree in co-relation 96942. Up to 3031 conditions per place. [2024-01-31 16:12:19,642 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 297 selfloop transitions, 645 changer transitions 16/961 dead transitions. [2024-01-31 16:12:19,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 961 transitions, 46361 flow [2024-01-31 16:12:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 16:12:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 16:12:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 530 transitions. [2024-01-31 16:12:19,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774774774774775 [2024-01-31 16:12:19,643 INFO L175 Difference]: Start difference. First operand has 534 places, 874 transitions, 43321 flow. Second operand 30 states and 530 transitions. [2024-01-31 16:12:19,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 961 transitions, 46361 flow [2024-01-31 16:12:24,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 961 transitions, 46238 flow, removed 4 selfloop flow, removed 19 redundant places. [2024-01-31 16:12:24,428 INFO L231 Difference]: Finished difference. Result has 548 places, 890 transitions, 46441 flow [2024-01-31 16:12:24,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=43202, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=46441, PETRI_PLACES=548, PETRI_TRANSITIONS=890} [2024-01-31 16:12:24,429 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 509 predicate places. [2024-01-31 16:12:24,429 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 890 transitions, 46441 flow [2024-01-31 16:12:24,429 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) [2024-01-31 16:12:24,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:24,429 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] [2024-01-31 16:12:24,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-01-31 16:12:24,629 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 [2024-01-31 16:12:24,630 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:12:24,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:24,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1178010476, now seen corresponding path program 19 times [2024-01-31 16:12:24,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:24,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691215775] [2024-01-31 16:12:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:24,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:25,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691215775] [2024-01-31 16:12:25,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691215775] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:25,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653563098] [2024-01-31 16:12:25,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:12:25,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:25,178 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) [2024-01-31 16:12:25,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 16:12:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:25,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:12:25,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:25,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:31,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653563098] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:31,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:31,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:12:31,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875491803] [2024-01-31 16:12:31,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:31,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:12:31,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:12:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:12:32,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:12:32,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 890 transitions, 46441 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) [2024-01-31 16:12:32,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:32,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:12:32,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:12:40,403 INFO L124 PetriNetUnfolderBase]: 3674/6624 cut-off events. [2024-01-31 16:12:40,403 INFO L125 PetriNetUnfolderBase]: For 715856/715856 co-relation queries the response was YES. [2024-01-31 16:12:40,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114998 conditions, 6624 events. 3674/6624 cut-off events. For 715856/715856 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 48477 event pairs, 345 based on Foata normal form. 2/6625 useless extension candidates. Maximal degree in co-relation 114826. Up to 3243 conditions per place. [2024-01-31 16:12:40,494 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 353 selfloop transitions, 767 changer transitions 14/1137 dead transitions. [2024-01-31 16:12:40,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1137 transitions, 56243 flow [2024-01-31 16:12:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-31 16:12:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-31 16:12:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 759 transitions. [2024-01-31 16:12:40,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128378378378379 [2024-01-31 16:12:40,496 INFO L175 Difference]: Start difference. First operand has 548 places, 890 transitions, 46441 flow. Second operand 40 states and 759 transitions. [2024-01-31 16:12:40,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1137 transitions, 56243 flow [2024-01-31 16:12:46,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 1137 transitions, 55992 flow, removed 46 selfloop flow, removed 21 redundant places. [2024-01-31 16:12:46,355 INFO L231 Difference]: Finished difference. Result has 579 places, 997 transitions, 55395 flow [2024-01-31 16:12:46,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=46251, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=55395, PETRI_PLACES=579, PETRI_TRANSITIONS=997} [2024-01-31 16:12:46,356 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 540 predicate places. [2024-01-31 16:12:46,356 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 997 transitions, 55395 flow [2024-01-31 16:12:46,356 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) [2024-01-31 16:12:46,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:12:46,357 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] [2024-01-31 16:12:46,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-01-31 16:12:46,565 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 [2024-01-31 16:12:46,565 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:12:46,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:12:46,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2109610258, now seen corresponding path program 20 times [2024-01-31 16:12:46,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:12:46,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077398051] [2024-01-31 16:12:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:12:46,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:12:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:12:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:47,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:12:47,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077398051] [2024-01-31 16:12:47,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077398051] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:12:47,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617664222] [2024-01-31 16:12:47,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:12:47,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:12:47,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:12:47,201 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) [2024-01-31 16:12:47,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 16:12:47,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:12:47,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:12:47,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:12:47,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:12:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:47,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:12:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:12:48,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617664222] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:12:48,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:12:48,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:12:48,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692156168] [2024-01-31 16:12:48,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:12:48,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:12:48,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:12:48,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:12:48,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:12:53,820 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 [] [2024-01-31 16:12:53,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-31 16:12:53,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 997 transitions, 55395 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) [2024-01-31 16:12:53,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:12:53,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-31 16:12:53,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:01,487 INFO L124 PetriNetUnfolderBase]: 4118/7403 cut-off events. [2024-01-31 16:13:01,487 INFO L125 PetriNetUnfolderBase]: For 932816/932816 co-relation queries the response was YES. [2024-01-31 16:13:01,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135813 conditions, 7403 events. 4118/7403 cut-off events. For 932816/932816 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 55050 event pairs, 365 based on Foata normal form. 2/7404 useless extension candidates. Maximal degree in co-relation 135628. Up to 3678 conditions per place. [2024-01-31 16:13:01,602 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 413 selfloop transitions, 821 changer transitions 16/1253 dead transitions. [2024-01-31 16:13:01,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1253 transitions, 66997 flow [2024-01-31 16:13:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-31 16:13:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-31 16:13:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 710 transitions. [2024-01-31 16:13:01,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46802900461437047 [2024-01-31 16:13:01,604 INFO L175 Difference]: Start difference. First operand has 579 places, 997 transitions, 55395 flow. Second operand 41 states and 710 transitions. [2024-01-31 16:13:01,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1253 transitions, 66997 flow [2024-01-31 16:13:09,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 1253 transitions, 66253 flow, removed 297 selfloop flow, removed 12 redundant places. [2024-01-31 16:13:09,846 INFO L231 Difference]: Finished difference. Result has 621 places, 1123 transitions, 64935 flow [2024-01-31 16:13:09,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=54814, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=703, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=64935, PETRI_PLACES=621, PETRI_TRANSITIONS=1123} [2024-01-31 16:13:09,847 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 582 predicate places. [2024-01-31 16:13:09,847 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1123 transitions, 64935 flow [2024-01-31 16:13:09,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-01-31 16:13:09,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:09,848 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] [2024-01-31 16:13:09,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-01-31 16:13:10,058 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 [2024-01-31 16:13:10,059 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:13:10,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:10,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1391749124, now seen corresponding path program 21 times [2024-01-31 16:13:10,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:10,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146031671] [2024-01-31 16:13:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:10,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:10,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:10,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146031671] [2024-01-31 16:13:10,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146031671] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:13:10,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70968308] [2024-01-31 16:13:10,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:13:10,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:13:10,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:13:10,662 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) [2024-01-31 16:13:10,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 16:13:10,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 16:13:10,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:13:10,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:13:10,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:13:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:11,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:13:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70968308] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:13:12,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:13:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-01-31 16:13:12,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889378253] [2024-01-31 16:13:12,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:13:12,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:13:12,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:12,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:13:12,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:13:13,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:13:13,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1123 transitions, 64935 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) [2024-01-31 16:13:13,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:13,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:13:13,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:21,601 INFO L124 PetriNetUnfolderBase]: 4351/7831 cut-off events. [2024-01-31 16:13:21,601 INFO L125 PetriNetUnfolderBase]: For 1044259/1044259 co-relation queries the response was YES. [2024-01-31 16:13:21,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148218 conditions, 7831 events. 4351/7831 cut-off events. For 1044259/1044259 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 59002 event pairs, 407 based on Foata normal form. 2/7832 useless extension candidates. Maximal degree in co-relation 148023. Up to 4250 conditions per place. [2024-01-31 16:13:21,809 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 408 selfloop transitions, 851 changer transitions 14/1276 dead transitions. [2024-01-31 16:13:21,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 649 places, 1276 transitions, 72559 flow [2024-01-31 16:13:21,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 16:13:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 16:13:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 546 transitions. [2024-01-31 16:13:21,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47602441150828245 [2024-01-31 16:13:21,810 INFO L175 Difference]: Start difference. First operand has 621 places, 1123 transitions, 64935 flow. Second operand 31 states and 546 transitions. [2024-01-31 16:13:21,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 649 places, 1276 transitions, 72559 flow [2024-01-31 16:13:32,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 633 places, 1276 transitions, 71891 flow, removed 281 selfloop flow, removed 16 redundant places. [2024-01-31 16:13:32,377 INFO L231 Difference]: Finished difference. Result has 645 places, 1198 transitions, 72008 flow [2024-01-31 16:13:32,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64389, PETRI_DIFFERENCE_MINUEND_PLACES=603, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=72008, PETRI_PLACES=645, PETRI_TRANSITIONS=1198} [2024-01-31 16:13:32,378 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 606 predicate places. [2024-01-31 16:13:32,378 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 1198 transitions, 72008 flow [2024-01-31 16:13:32,378 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) [2024-01-31 16:13:32,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:32,378 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] [2024-01-31 16:13:32,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-01-31 16:13:32,578 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 [2024-01-31 16:13:32,579 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:13:32,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:13:32,579 INFO L85 PathProgramCache]: Analyzing trace with hash -239167738, now seen corresponding path program 22 times [2024-01-31 16:13:32,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:13:32,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246761191] [2024-01-31 16:13:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:13:32,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:13:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:13:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:33,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:13:33,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246761191] [2024-01-31 16:13:33,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246761191] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:13:33,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141938291] [2024-01-31 16:13:33,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:13:33,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:13:33,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:13:33,211 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) [2024-01-31 16:13:33,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 16:13:33,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:13:33,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:13:33,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:13:33,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:13:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:33,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:13:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:13:35,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141938291] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:13:35,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:13:35,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:13:35,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032179002] [2024-01-31 16:13:35,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:13:35,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:13:35,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:13:35,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:13:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:13:36,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:13:36,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1198 transitions, 72008 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) [2024-01-31 16:13:36,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:13:36,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:13:36,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:13:46,654 INFO L124 PetriNetUnfolderBase]: 4475/8085 cut-off events. [2024-01-31 16:13:46,655 INFO L125 PetriNetUnfolderBase]: For 1199238/1199238 co-relation queries the response was YES. [2024-01-31 16:13:46,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157948 conditions, 8085 events. 4475/8085 cut-off events. For 1199238/1199238 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 61532 event pairs, 407 based on Foata normal form. 4/8088 useless extension candidates. Maximal degree in co-relation 157747. Up to 3991 conditions per place. [2024-01-31 16:13:46,806 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 410 selfloop transitions, 942 changer transitions 13/1368 dead transitions. [2024-01-31 16:13:46,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 1368 transitions, 78377 flow [2024-01-31 16:13:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-01-31 16:13:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-01-31 16:13:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 849 transitions. [2024-01-31 16:13:46,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48821161587119033 [2024-01-31 16:13:46,808 INFO L175 Difference]: Start difference. First operand has 645 places, 1198 transitions, 72008 flow. Second operand 47 states and 849 transitions. [2024-01-31 16:13:46,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 1368 transitions, 78377 flow [2024-01-31 16:13:59,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 1368 transitions, 78145 flow, removed 63 selfloop flow, removed 16 redundant places. [2024-01-31 16:13:59,993 INFO L231 Difference]: Finished difference. Result has 680 places, 1234 transitions, 77216 flow [2024-01-31 16:13:59,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=71798, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=910, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=77216, PETRI_PLACES=680, PETRI_TRANSITIONS=1234} [2024-01-31 16:13:59,994 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 641 predicate places. [2024-01-31 16:13:59,994 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 1234 transitions, 77216 flow [2024-01-31 16:13:59,995 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) [2024-01-31 16:13:59,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:13:59,995 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] [2024-01-31 16:14:00,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-01-31 16:14:00,203 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 [2024-01-31 16:14:00,203 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:14:00,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:14:00,203 INFO L85 PathProgramCache]: Analyzing trace with hash 395171402, now seen corresponding path program 23 times [2024-01-31 16:14:00,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:14:00,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102120580] [2024-01-31 16:14:00,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:14:00,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:14:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:14:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:00,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:14:00,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102120580] [2024-01-31 16:14:00,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102120580] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:14:00,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960699444] [2024-01-31 16:14:00,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:14:00,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:14:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:14:00,772 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) [2024-01-31 16:14:00,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 16:14:00,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 16:14:00,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:14:00,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:14:00,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:14:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:01,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:14:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:02,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960699444] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:14:02,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:14:02,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:14:02,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644226583] [2024-01-31 16:14:02,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:14:02,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:14:02,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:14:02,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:14:02,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:14:03,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:14:03,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 1234 transitions, 77216 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) [2024-01-31 16:14:03,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:14:03,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:14:03,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:14:13,746 INFO L124 PetriNetUnfolderBase]: 4728/8561 cut-off events. [2024-01-31 16:14:13,746 INFO L125 PetriNetUnfolderBase]: For 1372219/1372219 co-relation queries the response was YES. [2024-01-31 16:14:13,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172322 conditions, 8561 events. 4728/8561 cut-off events. For 1372219/1372219 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 66049 event pairs, 439 based on Foata normal form. 4/8564 useless extension candidates. Maximal degree in co-relation 172140. Up to 4534 conditions per place. [2024-01-31 16:14:13,979 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 441 selfloop transitions, 966 changer transitions 17/1427 dead transitions. [2024-01-31 16:14:13,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 1427 transitions, 85741 flow [2024-01-31 16:14:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-01-31 16:14:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-01-31 16:14:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 759 transitions. [2024-01-31 16:14:13,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48841698841698844 [2024-01-31 16:14:13,980 INFO L175 Difference]: Start difference. First operand has 680 places, 1234 transitions, 77216 flow. Second operand 42 states and 759 transitions. [2024-01-31 16:14:13,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 1427 transitions, 85741 flow [2024-01-31 16:14:28,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 701 places, 1427 transitions, 85172 flow, removed 224 selfloop flow, removed 19 redundant places. [2024-01-31 16:14:28,916 INFO L231 Difference]: Finished difference. Result has 712 places, 1296 transitions, 84814 flow [2024-01-31 16:14:28,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=76699, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=911, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=84814, PETRI_PLACES=712, PETRI_TRANSITIONS=1296} [2024-01-31 16:14:28,917 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 673 predicate places. [2024-01-31 16:14:28,917 INFO L495 AbstractCegarLoop]: Abstraction has has 712 places, 1296 transitions, 84814 flow [2024-01-31 16:14:28,918 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) [2024-01-31 16:14:28,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:14:28,918 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] [2024-01-31 16:14:28,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-31 16:14:29,118 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 [2024-01-31 16:14:29,118 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:14:29,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:14:29,119 INFO L85 PathProgramCache]: Analyzing trace with hash -709602324, now seen corresponding path program 24 times [2024-01-31 16:14:29,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:14:29,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097360530] [2024-01-31 16:14:29,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:14:29,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:14:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:14:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:29,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:14:29,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097360530] [2024-01-31 16:14:29,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097360530] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:14:29,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073132338] [2024-01-31 16:14:29,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:14:29,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:14:29,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:14:29,555 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) [2024-01-31 16:14:29,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-31 16:14:29,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:14:29,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:14:29,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:14:29,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:14:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:29,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:14:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:31,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073132338] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:14:31,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:14:31,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-01-31 16:14:31,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398530157] [2024-01-31 16:14:31,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:14:31,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:14:31,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:14:31,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:14:31,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:14:32,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:14:32,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 712 places, 1296 transitions, 84814 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) [2024-01-31 16:14:32,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:14:32,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:14:32,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:14:40,624 INFO L124 PetriNetUnfolderBase]: 4732/8563 cut-off events. [2024-01-31 16:14:40,625 INFO L125 PetriNetUnfolderBase]: For 1443217/1443217 co-relation queries the response was YES. [2024-01-31 16:14:40,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179646 conditions, 8563 events. 4732/8563 cut-off events. For 1443217/1443217 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 66044 event pairs, 523 based on Foata normal form. 2/8564 useless extension candidates. Maximal degree in co-relation 179430. Up to 5514 conditions per place. [2024-01-31 16:14:40,779 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 479 selfloop transitions, 863 changer transitions 14/1359 dead transitions. [2024-01-31 16:14:40,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 1359 transitions, 88330 flow [2024-01-31 16:14:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 16:14:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 16:14:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 427 transitions. [2024-01-31 16:14:40,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48085585585585583 [2024-01-31 16:14:40,781 INFO L175 Difference]: Start difference. First operand has 712 places, 1296 transitions, 84814 flow. Second operand 24 states and 427 transitions. [2024-01-31 16:14:40,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 1359 transitions, 88330 flow [2024-01-31 16:14:58,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 710 places, 1359 transitions, 88005 flow, removed 88 selfloop flow, removed 23 redundant places. [2024-01-31 16:14:58,459 INFO L231 Difference]: Finished difference. Result has 715 places, 1300 transitions, 87725 flow [2024-01-31 16:14:58,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=84489, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=859, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=87725, PETRI_PLACES=715, PETRI_TRANSITIONS=1300} [2024-01-31 16:14:58,460 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 676 predicate places. [2024-01-31 16:14:58,460 INFO L495 AbstractCegarLoop]: Abstraction has has 715 places, 1300 transitions, 87725 flow [2024-01-31 16:14:58,460 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) [2024-01-31 16:14:58,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:14:58,461 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] [2024-01-31 16:14:58,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-31 16:14:58,661 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 [2024-01-31 16:14:58,661 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:14:58,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:14:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash 470689708, now seen corresponding path program 25 times [2024-01-31 16:14:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:14:58,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020308833] [2024-01-31 16:14:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:14:58,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:14:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:14:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:59,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:14:59,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020308833] [2024-01-31 16:14:59,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020308833] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:14:59,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051845842] [2024-01-31 16:14:59,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:14:59,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:14:59,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:14:59,150 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) [2024-01-31 16:14:59,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-31 16:14:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:14:59,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:14:59,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:14:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:14:59,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:15:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:15:01,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051845842] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:15:01,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:15:01,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:15:01,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923880848] [2024-01-31 16:15:01,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:15:01,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:15:01,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:15:01,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:15:01,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:15:01,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:15:01,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 715 places, 1300 transitions, 87725 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) [2024-01-31 16:15:01,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:15:01,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:15:01,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:15:10,945 INFO L124 PetriNetUnfolderBase]: 4813/8744 cut-off events. [2024-01-31 16:15:10,946 INFO L125 PetriNetUnfolderBase]: For 1492254/1492254 co-relation queries the response was YES. [2024-01-31 16:15:11,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186958 conditions, 8744 events. 4813/8744 cut-off events. For 1492254/1492254 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 68021 event pairs, 469 based on Foata normal form. 3/8746 useless extension candidates. Maximal degree in co-relation 186742. Up to 5180 conditions per place. [2024-01-31 16:15:11,122 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 469 selfloop transitions, 930 changer transitions 11/1413 dead transitions. [2024-01-31 16:15:11,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 750 places, 1413 transitions, 92331 flow [2024-01-31 16:15:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 16:15:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 16:15:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 673 transitions. [2024-01-31 16:15:11,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4786628733997155 [2024-01-31 16:15:11,123 INFO L175 Difference]: Start difference. First operand has 715 places, 1300 transitions, 87725 flow. Second operand 38 states and 673 transitions. [2024-01-31 16:15:11,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 750 places, 1413 transitions, 92331 flow [2024-01-31 16:15:29,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 1413 transitions, 92220 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-01-31 16:15:30,020 INFO L231 Difference]: Finished difference. Result has 743 places, 1318 transitions, 92283 flow [2024-01-31 16:15:30,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=87618, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=913, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=92283, PETRI_PLACES=743, PETRI_TRANSITIONS=1318} [2024-01-31 16:15:30,021 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 704 predicate places. [2024-01-31 16:15:30,021 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 1318 transitions, 92283 flow [2024-01-31 16:15:30,022 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) [2024-01-31 16:15:30,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:15:30,022 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] [2024-01-31 16:15:30,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-31 16:15:30,223 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 [2024-01-31 16:15:30,223 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:15:30,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:15:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1379576604, now seen corresponding path program 26 times [2024-01-31 16:15:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:15:30,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768077261] [2024-01-31 16:15:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:15:30,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:15:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:15:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:15:30,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:15:30,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768077261] [2024-01-31 16:15:30,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768077261] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:15:30,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77417422] [2024-01-31 16:15:30,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:15:30,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:15:30,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:15:30,722 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) [2024-01-31 16:15:30,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-31 16:15:30,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:15:30,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:15:30,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:15:30,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:15:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:15:31,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:15:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:15:32,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77417422] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:15:32,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:15:32,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:15:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921760262] [2024-01-31 16:15:32,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:15:32,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:15:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:15:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:15:32,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:15:33,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:15:33,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 1318 transitions, 92283 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) [2024-01-31 16:15:33,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:15:33,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:15:33,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:15:43,796 INFO L124 PetriNetUnfolderBase]: 4801/8706 cut-off events. [2024-01-31 16:15:43,796 INFO L125 PetriNetUnfolderBase]: For 1604462/1604462 co-relation queries the response was YES. [2024-01-31 16:15:43,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193006 conditions, 8706 events. 4801/8706 cut-off events. For 1604462/1604462 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 67535 event pairs, 445 based on Foata normal form. 5/8710 useless extension candidates. Maximal degree in co-relation 192797. Up to 5200 conditions per place. [2024-01-31 16:15:43,959 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 464 selfloop transitions, 937 changer transitions 12/1416 dead transitions. [2024-01-31 16:15:43,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 779 places, 1416 transitions, 95952 flow [2024-01-31 16:15:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 16:15:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 16:15:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 680 transitions. [2024-01-31 16:15:43,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48364153627311524 [2024-01-31 16:15:43,961 INFO L175 Difference]: Start difference. First operand has 743 places, 1318 transitions, 92283 flow. Second operand 38 states and 680 transitions. [2024-01-31 16:15:43,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 779 places, 1416 transitions, 95952 flow [2024-01-31 16:16:04,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 1416 transitions, 95678 flow, removed 72 selfloop flow, removed 18 redundant places. [2024-01-31 16:16:04,720 INFO L231 Difference]: Finished difference. Result has 765 places, 1320 transitions, 95316 flow [2024-01-31 16:16:04,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=91981, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=932, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=95316, PETRI_PLACES=765, PETRI_TRANSITIONS=1320} [2024-01-31 16:16:04,722 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 726 predicate places. [2024-01-31 16:16:04,722 INFO L495 AbstractCegarLoop]: Abstraction has has 765 places, 1320 transitions, 95316 flow [2024-01-31 16:16:04,722 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) [2024-01-31 16:16:04,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:16:04,722 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] [2024-01-31 16:16:04,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-31 16:16:04,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-31 16:16:04,923 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:16:04,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:16:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2027916516, now seen corresponding path program 27 times [2024-01-31 16:16:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:16:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023813315] [2024-01-31 16:16:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:16:04,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:16:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:16:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:16:05,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:16:05,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023813315] [2024-01-31 16:16:05,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023813315] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:16:05,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871903401] [2024-01-31 16:16:05,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:16:05,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:16:05,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:16:05,555 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:16:05,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-31 16:16:05,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:16:05,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:16:05,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:16:05,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:16:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:16:06,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:16:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:16:07,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871903401] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:16:07,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:16:07,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:16:07,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291801882] [2024-01-31 16:16:07,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:16:07,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:16:07,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:16:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:16:07,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:16:08,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:16:08,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 765 places, 1320 transitions, 95316 flow. Second operand has 24 states, 24 states have (on average 14.166666666666666) internal successors, (340), 24 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:16:08,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:16:08,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:16:08,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:16:17,410 INFO L124 PetriNetUnfolderBase]: 4835/8763 cut-off events. [2024-01-31 16:16:17,410 INFO L125 PetriNetUnfolderBase]: For 1767207/1767207 co-relation queries the response was YES. [2024-01-31 16:16:17,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200372 conditions, 8763 events. 4835/8763 cut-off events. For 1767207/1767207 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 68061 event pairs, 503 based on Foata normal form. 4/8766 useless extension candidates. Maximal degree in co-relation 200161. Up to 5269 conditions per place. [2024-01-31 16:16:17,673 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 506 selfloop transitions, 918 changer transitions 13/1440 dead transitions. [2024-01-31 16:16:17,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 797 places, 1440 transitions, 99862 flow [2024-01-31 16:16:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 16:16:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 16:16:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 640 transitions. [2024-01-31 16:16:17,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087440381558028 [2024-01-31 16:16:17,675 INFO L175 Difference]: Start difference. First operand has 765 places, 1320 transitions, 95316 flow. Second operand 34 states and 640 transitions. [2024-01-31 16:16:17,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 797 places, 1440 transitions, 99862 flow [2024-01-31 16:16:38,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 767 places, 1440 transitions, 99329 flow, removed 3 selfloop flow, removed 30 redundant places. [2024-01-31 16:16:38,981 INFO L231 Difference]: Finished difference. Result has 773 places, 1329 transitions, 98736 flow [2024-01-31 16:16:38,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=94785, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=910, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=98736, PETRI_PLACES=773, PETRI_TRANSITIONS=1329} [2024-01-31 16:16:38,983 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 734 predicate places. [2024-01-31 16:16:38,983 INFO L495 AbstractCegarLoop]: Abstraction has has 773 places, 1329 transitions, 98736 flow [2024-01-31 16:16:38,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.166666666666666) internal successors, (340), 24 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:16:38,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:16:38,983 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] [2024-01-31 16:16:38,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-01-31 16:16:39,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:16:39,184 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:16:39,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:16:39,184 INFO L85 PathProgramCache]: Analyzing trace with hash 478400262, now seen corresponding path program 28 times [2024-01-31 16:16:39,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:16:39,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285786201] [2024-01-31 16:16:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:16:39,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:16:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:16:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:16:39,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:16:39,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285786201] [2024-01-31 16:16:39,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285786201] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:16:39,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343497589] [2024-01-31 16:16:39,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:16:39,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:16:39,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:16:39,736 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:16:39,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-31 16:16:39,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:16:39,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:16:39,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:16:39,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:16:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:16:40,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:16:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:16:41,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343497589] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:16:41,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:16:41,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:16:41,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058553598] [2024-01-31 16:16:41,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:16:41,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:16:41,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:16:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:16:41,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:16:42,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:16:42,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 773 places, 1329 transitions, 98736 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) [2024-01-31 16:16:42,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:16:42,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:16:42,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:16:52,363 INFO L124 PetriNetUnfolderBase]: 4875/8813 cut-off events. [2024-01-31 16:16:52,363 INFO L125 PetriNetUnfolderBase]: For 1963862/1963862 co-relation queries the response was YES. [2024-01-31 16:16:52,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208534 conditions, 8813 events. 4875/8813 cut-off events. For 1963862/1963862 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 68409 event pairs, 445 based on Foata normal form. 5/8817 useless extension candidates. Maximal degree in co-relation 208303. Up to 4318 conditions per place. [2024-01-31 16:16:52,634 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 461 selfloop transitions, 973 changer transitions 17/1454 dead transitions. [2024-01-31 16:16:52,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 806 places, 1454 transitions, 104149 flow [2024-01-31 16:16:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:16:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:16:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 659 transitions. [2024-01-31 16:16:52,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088803088803089 [2024-01-31 16:16:52,635 INFO L175 Difference]: Start difference. First operand has 773 places, 1329 transitions, 98736 flow. Second operand 35 states and 659 transitions. [2024-01-31 16:16:52,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 806 places, 1454 transitions, 104149 flow [2024-01-31 16:17:16,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 785 places, 1454 transitions, 103957 flow, removed 9 selfloop flow, removed 21 redundant places. [2024-01-31 16:17:16,641 INFO L231 Difference]: Finished difference. Result has 790 places, 1348 transitions, 102834 flow [2024-01-31 16:17:16,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=98548, PETRI_DIFFERENCE_MINUEND_PLACES=751, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=954, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=102834, PETRI_PLACES=790, PETRI_TRANSITIONS=1348} [2024-01-31 16:17:16,643 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 751 predicate places. [2024-01-31 16:17:16,643 INFO L495 AbstractCegarLoop]: Abstraction has has 790 places, 1348 transitions, 102834 flow [2024-01-31 16:17:16,643 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) [2024-01-31 16:17:16,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:17:16,643 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] [2024-01-31 16:17:16,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-01-31 16:17:16,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-01-31 16:17:16,844 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:17:16,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:17:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash 809911920, now seen corresponding path program 29 times [2024-01-31 16:17:16,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:17:16,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091575542] [2024-01-31 16:17:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:17:16,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:17:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:17:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:17:17,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:17:17,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091575542] [2024-01-31 16:17:17,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091575542] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:17:17,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257066495] [2024-01-31 16:17:17,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:17:17,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:17:17,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:17:17,332 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:17:17,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-31 16:17:17,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:17:17,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:17:17,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:17:17,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:17:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:17:17,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:17:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:17:19,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257066495] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:17:19,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:17:19,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:17:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064482598] [2024-01-31 16:17:19,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:17:19,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:17:19,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:17:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:17:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:17:20,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:17:20,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 790 places, 1348 transitions, 102834 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) [2024-01-31 16:17:20,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:17:20,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:17:20,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:17:30,810 INFO L124 PetriNetUnfolderBase]: 4843/8733 cut-off events. [2024-01-31 16:17:30,810 INFO L125 PetriNetUnfolderBase]: For 1934433/1934433 co-relation queries the response was YES. [2024-01-31 16:17:30,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213256 conditions, 8733 events. 4843/8733 cut-off events. For 1934433/1934433 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 67416 event pairs, 451 based on Foata normal form. 3/8735 useless extension candidates. Maximal degree in co-relation 213022. Up to 5424 conditions per place. [2024-01-31 16:17:30,990 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 475 selfloop transitions, 933 changer transitions 14/1425 dead transitions. [2024-01-31 16:17:30,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 819 places, 1425 transitions, 106370 flow [2024-01-31 16:17:30,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 16:17:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 16:17:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 566 transitions. [2024-01-31 16:17:30,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780405405405405 [2024-01-31 16:17:30,991 INFO L175 Difference]: Start difference. First operand has 790 places, 1348 transitions, 102834 flow. Second operand 32 states and 566 transitions. [2024-01-31 16:17:30,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 819 places, 1425 transitions, 106370 flow [2024-01-31 16:17:56,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 1425 transitions, 105343 flow, removed 87 selfloop flow, removed 22 redundant places. [2024-01-31 16:17:57,056 INFO L231 Difference]: Finished difference. Result has 802 places, 1352 transitions, 105333 flow [2024-01-31 16:17:57,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=101815, PETRI_DIFFERENCE_MINUEND_PLACES=766, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=105333, PETRI_PLACES=802, PETRI_TRANSITIONS=1352} [2024-01-31 16:17:57,057 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 763 predicate places. [2024-01-31 16:17:57,058 INFO L495 AbstractCegarLoop]: Abstraction has has 802 places, 1352 transitions, 105333 flow [2024-01-31 16:17:57,058 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) [2024-01-31 16:17:57,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:17:57,058 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] [2024-01-31 16:17:57,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-01-31 16:17:57,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:17:57,268 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:17:57,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:17:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1876740194, now seen corresponding path program 30 times [2024-01-31 16:17:57,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:17:57,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716733841] [2024-01-31 16:17:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:17:57,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:17:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:17:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:17:57,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:17:57,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716733841] [2024-01-31 16:17:57,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716733841] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:17:57,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967301487] [2024-01-31 16:17:57,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:17:57,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:17:57,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:17:57,857 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:17:57,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-31 16:17:58,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 16:17:58,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:17:58,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:17:58,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:17:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:17:58,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:17:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:17:59,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967301487] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:17:59,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:17:59,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:17:59,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140214467] [2024-01-31 16:17:59,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:17:59,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:17:59,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:17:59,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:17:59,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:18:05,051 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 [] [2024-01-31 16:18:05,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-01-31 16:18:05,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 1352 transitions, 105333 flow. Second operand has 23 states, 23 states have (on average 13.130434782608695) internal successors, (302), 23 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:18:05,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:18:05,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-01-31 16:18:05,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:18:16,782 INFO L124 PetriNetUnfolderBase]: 4969/8954 cut-off events. [2024-01-31 16:18:16,782 INFO L125 PetriNetUnfolderBase]: For 2211779/2211779 co-relation queries the response was YES. [2024-01-31 16:18:16,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222752 conditions, 8954 events. 4969/8954 cut-off events. For 2211779/2211779 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 69240 event pairs, 447 based on Foata normal form. 3/8956 useless extension candidates. Maximal degree in co-relation 222544. Up to 4725 conditions per place. [2024-01-31 16:18:16,970 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 435 selfloop transitions, 1043 changer transitions 16/1497 dead transitions. [2024-01-31 16:18:16,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 838 places, 1497 transitions, 112334 flow [2024-01-31 16:18:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-01-31 16:18:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-01-31 16:18:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 665 transitions. [2024-01-31 16:18:16,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46084546084546085 [2024-01-31 16:18:16,972 INFO L175 Difference]: Start difference. First operand has 802 places, 1352 transitions, 105333 flow. Second operand 39 states and 665 transitions. [2024-01-31 16:18:16,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 838 places, 1497 transitions, 112334 flow [2024-01-31 16:18:42,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 820 places, 1497 transitions, 112154 flow, removed 5 selfloop flow, removed 18 redundant places. [2024-01-31 16:18:42,703 INFO L231 Difference]: Finished difference. Result has 827 places, 1387 transitions, 111508 flow [2024-01-31 16:18:42,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=105153, PETRI_DIFFERENCE_MINUEND_PLACES=782, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=111508, PETRI_PLACES=827, PETRI_TRANSITIONS=1387} [2024-01-31 16:18:42,704 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 788 predicate places. [2024-01-31 16:18:42,705 INFO L495 AbstractCegarLoop]: Abstraction has has 827 places, 1387 transitions, 111508 flow [2024-01-31 16:18:42,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.130434782608695) internal successors, (302), 23 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:18:42,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:18:42,705 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] [2024-01-31 16:18:42,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-01-31 16:18:42,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:18:42,914 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:18:42,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:18:42,915 INFO L85 PathProgramCache]: Analyzing trace with hash 779868324, now seen corresponding path program 31 times [2024-01-31 16:18:42,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:18:42,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239092605] [2024-01-31 16:18:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:18:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:18:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:18:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:18:43,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:18:43,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239092605] [2024-01-31 16:18:43,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239092605] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:18:43,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773993143] [2024-01-31 16:18:43,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:18:43,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:18:43,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:18:43,367 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:18:43,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-31 16:18:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:18:43,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:18:43,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:18:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:18:43,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:18:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:18:45,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773993143] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:18:45,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:18:45,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:18:45,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364329197] [2024-01-31 16:18:45,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:18:45,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:18:45,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:18:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:18:45,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:18:46,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:18:46,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 827 places, 1387 transitions, 111508 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) [2024-01-31 16:18:46,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:18:46,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:18:46,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:18:57,947 INFO L124 PetriNetUnfolderBase]: 4949/8910 cut-off events. [2024-01-31 16:18:57,947 INFO L125 PetriNetUnfolderBase]: For 2156780/2156780 co-relation queries the response was YES. [2024-01-31 16:18:58,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228427 conditions, 8910 events. 4949/8910 cut-off events. For 2156780/2156780 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 68711 event pairs, 463 based on Foata normal form. 2/8911 useless extension candidates. Maximal degree in co-relation 228213. Up to 5556 conditions per place. [2024-01-31 16:18:58,227 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 490 selfloop transitions, 957 changer transitions 14/1464 dead transitions. [2024-01-31 16:18:58,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 858 places, 1464 transitions, 114917 flow [2024-01-31 16:18:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 16:18:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 16:18:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 596 transitions. [2024-01-31 16:18:58,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4737678855325914 [2024-01-31 16:18:58,228 INFO L175 Difference]: Start difference. First operand has 827 places, 1387 transitions, 111508 flow. Second operand 34 states and 596 transitions. [2024-01-31 16:18:58,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 858 places, 1464 transitions, 114917 flow [2024-01-31 16:19:28,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 830 places, 1464 transitions, 114550 flow, removed 56 selfloop flow, removed 28 redundant places. [2024-01-31 16:19:28,972 INFO L231 Difference]: Finished difference. Result has 835 places, 1389 transitions, 114754 flow [2024-01-31 16:19:28,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=111143, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=954, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=114754, PETRI_PLACES=835, PETRI_TRANSITIONS=1389} [2024-01-31 16:19:28,973 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 796 predicate places. [2024-01-31 16:19:28,974 INFO L495 AbstractCegarLoop]: Abstraction has has 835 places, 1389 transitions, 114754 flow [2024-01-31 16:19:28,974 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) [2024-01-31 16:19:28,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:19:28,974 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] [2024-01-31 16:19:28,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-01-31 16:19:29,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-01-31 16:19:29,174 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:19:29,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:19:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash 436601196, now seen corresponding path program 32 times [2024-01-31 16:19:29,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:19:29,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148675230] [2024-01-31 16:19:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:19:29,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:19:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:19:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:19:29,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:19:29,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148675230] [2024-01-31 16:19:29,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148675230] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:19:29,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585147338] [2024-01-31 16:19:29,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:19:29,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:19:29,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:19:29,666 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:19:29,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-31 16:19:29,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:19:29,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:19:29,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:19:29,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:19:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:19:30,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:19:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:19:31,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585147338] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:19:31,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:19:31,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:19:31,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616304019] [2024-01-31 16:19:31,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:19:31,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:19:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:19:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:19:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:19:32,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:19:32,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 835 places, 1389 transitions, 114754 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) [2024-01-31 16:19:32,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:19:32,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:19:32,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:19:43,547 INFO L124 PetriNetUnfolderBase]: 5052/9099 cut-off events. [2024-01-31 16:19:43,547 INFO L125 PetriNetUnfolderBase]: For 2563861/2563861 co-relation queries the response was YES. [2024-01-31 16:19:43,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239330 conditions, 9099 events. 5052/9099 cut-off events. For 2563861/2563861 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 70340 event pairs, 445 based on Foata normal form. 4/9102 useless extension candidates. Maximal degree in co-relation 239085. Up to 4804 conditions per place. [2024-01-31 16:19:43,769 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 498 selfloop transitions, 1001 changer transitions 16/1518 dead transitions. [2024-01-31 16:19:43,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 869 places, 1518 transitions, 121045 flow [2024-01-31 16:19:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 16:19:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 16:19:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 668 transitions. [2024-01-31 16:19:43,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48794740686632576 [2024-01-31 16:19:43,771 INFO L175 Difference]: Start difference. First operand has 835 places, 1389 transitions, 114754 flow. Second operand 37 states and 668 transitions. [2024-01-31 16:19:43,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 869 places, 1518 transitions, 121045 flow [2024-01-31 16:20:19,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 848 places, 1518 transitions, 120853 flow, removed 19 selfloop flow, removed 21 redundant places. [2024-01-31 16:20:20,078 INFO L231 Difference]: Finished difference. Result has 855 places, 1414 transitions, 120102 flow [2024-01-31 16:20:20,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=114566, PETRI_DIFFERENCE_MINUEND_PLACES=812, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=978, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=120102, PETRI_PLACES=855, PETRI_TRANSITIONS=1414} [2024-01-31 16:20:20,080 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 816 predicate places. [2024-01-31 16:20:20,080 INFO L495 AbstractCegarLoop]: Abstraction has has 855 places, 1414 transitions, 120102 flow [2024-01-31 16:20:20,080 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) [2024-01-31 16:20:20,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:20:20,080 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] [2024-01-31 16:20:20,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-01-31 16:20:20,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-01-31 16:20:20,292 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:20:20,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:20:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1502196202, now seen corresponding path program 33 times [2024-01-31 16:20:20,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:20:20,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491426460] [2024-01-31 16:20:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:20:20,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:20:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:20:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:20:20,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:20:20,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491426460] [2024-01-31 16:20:20,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491426460] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:20:20,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763254035] [2024-01-31 16:20:20,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:20:20,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:20:20,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:20:20,756 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:20:20,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-31 16:20:20,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 16:20:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:20:20,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:20:20,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:20:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:20:21,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:20:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:20:22,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763254035] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:20:22,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:20:22,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2024-01-31 16:20:22,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927017203] [2024-01-31 16:20:22,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:20:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-31 16:20:22,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:20:22,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-31 16:20:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2024-01-31 16:20:23,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:20:23,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 855 places, 1414 transitions, 120102 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) [2024-01-31 16:20:23,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:20:23,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:20:23,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:20:33,477 INFO L124 PetriNetUnfolderBase]: 5082/9142 cut-off events. [2024-01-31 16:20:33,477 INFO L125 PetriNetUnfolderBase]: For 2567767/2567767 co-relation queries the response was YES. [2024-01-31 16:20:34,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248285 conditions, 9142 events. 5082/9142 cut-off events. For 2567767/2567767 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 70658 event pairs, 443 based on Foata normal form. 8/9149 useless extension candidates. Maximal degree in co-relation 248035. Up to 5339 conditions per place. [2024-01-31 16:20:34,109 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 524 selfloop transitions, 971 changer transitions 14/1512 dead transitions. [2024-01-31 16:20:34,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 881 places, 1512 transitions, 124936 flow [2024-01-31 16:20:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 16:20:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 16:20:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 554 transitions. [2024-01-31 16:20:34,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990990990990991 [2024-01-31 16:20:34,110 INFO L175 Difference]: Start difference. First operand has 855 places, 1414 transitions, 120102 flow. Second operand 30 states and 554 transitions. [2024-01-31 16:20:34,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 881 places, 1512 transitions, 124936 flow [2024-01-31 16:21:07,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 856 places, 1512 transitions, 124635 flow, removed 54 selfloop flow, removed 25 redundant places. [2024-01-31 16:21:07,812 INFO L231 Difference]: Finished difference. Result has 862 places, 1422 transitions, 123953 flow [2024-01-31 16:21:07,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=119803, PETRI_DIFFERENCE_MINUEND_PLACES=827, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=964, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=123953, PETRI_PLACES=862, PETRI_TRANSITIONS=1422} [2024-01-31 16:21:07,814 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 823 predicate places. [2024-01-31 16:21:07,814 INFO L495 AbstractCegarLoop]: Abstraction has has 862 places, 1422 transitions, 123953 flow [2024-01-31 16:21:07,814 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) [2024-01-31 16:21:07,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:21:07,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:21:07,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-01-31 16:21:08,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-31 16:21:08,015 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:21:08,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:21:08,015 INFO L85 PathProgramCache]: Analyzing trace with hash -387744992, now seen corresponding path program 34 times [2024-01-31 16:21:08,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:21:08,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485870937] [2024-01-31 16:21:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:21:08,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:21:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:21:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:21:08,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:21:08,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485870937] [2024-01-31 16:21:08,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485870937] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:21:08,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548254439] [2024-01-31 16:21:08,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:21:08,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:21:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:21:08,513 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:21:08,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-31 16:21:08,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:21:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:21:08,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 21 conjunts are in the unsatisfiable core [2024-01-31 16:21:08,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:21:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:21:08,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:21:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:21:10,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548254439] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:21:10,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:21:10,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2024-01-31 16:21:10,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094351772] [2024-01-31 16:21:10,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:21:10,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 16:21:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:21:10,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 16:21:10,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2024-01-31 16:21:14,957 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 [] [2024-01-31 16:21:19,005 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 [] [2024-01-31 16:21:19,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-01-31 16:21:19,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 862 places, 1422 transitions, 123953 flow. Second operand has 22 states, 22 states have (on average 12.227272727272727) internal successors, (269), 22 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:21:19,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:21:19,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-01-31 16:21:19,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:21:30,619 INFO L124 PetriNetUnfolderBase]: 5127/9208 cut-off events. [2024-01-31 16:21:30,619 INFO L125 PetriNetUnfolderBase]: For 2894985/2894985 co-relation queries the response was YES. [2024-01-31 16:21:30,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258394 conditions, 9208 events. 5127/9208 cut-off events. For 2894985/2894985 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 71125 event pairs, 477 based on Foata normal form. 2/9209 useless extension candidates. Maximal degree in co-relation 258157. Up to 4874 conditions per place. [2024-01-31 16:21:30,813 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 487 selfloop transitions, 1033 changer transitions 14/1537 dead transitions. [2024-01-31 16:21:30,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 1537 transitions, 131543 flow [2024-01-31 16:21:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 16:21:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 16:21:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 472 transitions. [2024-01-31 16:21:30,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252252252252252 [2024-01-31 16:21:30,814 INFO L175 Difference]: Start difference. First operand has 862 places, 1422 transitions, 123953 flow. Second operand 30 states and 472 transitions. [2024-01-31 16:21:30,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 1537 transitions, 131543 flow [2024-01-31 16:22:06,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 869 places, 1537 transitions, 131298 flow, removed 9 selfloop flow, removed 21 redundant places. [2024-01-31 16:22:06,121 INFO L231 Difference]: Finished difference. Result has 874 places, 1460 transitions, 131084 flow [2024-01-31 16:22:06,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=123710, PETRI_DIFFERENCE_MINUEND_PLACES=840, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=997, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=131084, PETRI_PLACES=874, PETRI_TRANSITIONS=1460} [2024-01-31 16:22:06,123 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 835 predicate places. [2024-01-31 16:22:06,123 INFO L495 AbstractCegarLoop]: Abstraction has has 874 places, 1460 transitions, 131084 flow [2024-01-31 16:22:06,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.227272727272727) internal successors, (269), 22 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:22:06,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:22:06,123 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] [2024-01-31 16:22:06,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-01-31 16:22:06,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-31 16:22:06,324 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 15 more)] === [2024-01-31 16:22:06,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:22:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1876775136, now seen corresponding path program 35 times [2024-01-31 16:22:06,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:22:06,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283149073] [2024-01-31 16:22:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:22:06,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:22:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:22:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:22:06,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:22:06,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283149073] [2024-01-31 16:22:06,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283149073] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:22:06,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693931812] [2024-01-31 16:22:06,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:22:06,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:22:06,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:22:06,912 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 16:22:06,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-31 16:22:07,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:22:07,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:22:07,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 16:22:07,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:22:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:22:07,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:22:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:22:08,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693931812] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:22:08,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:22:08,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-01-31 16:22:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921958860] [2024-01-31 16:22:08,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:22:08,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 16:22:08,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:22:08,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 16:22:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:22:10,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 37 [2024-01-31 16:22:10,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 874 places, 1460 transitions, 131084 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) [2024-01-31 16:22:10,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:22:10,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 37 [2024-01-31 16:22:10,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:22:23,007 INFO L124 PetriNetUnfolderBase]: 5233/9410 cut-off events. [2024-01-31 16:22:23,008 INFO L125 PetriNetUnfolderBase]: For 3134591/3134591 co-relation queries the response was YES. [2024-01-31 16:22:23,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270996 conditions, 9410 events. 5233/9410 cut-off events. For 3134591/3134591 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 72903 event pairs, 457 based on Foata normal form. 2/9411 useless extension candidates. Maximal degree in co-relation 270737. Up to 4895 conditions per place. [2024-01-31 16:22:23,307 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 465 selfloop transitions, 1113 changer transitions 14/1595 dead transitions. [2024-01-31 16:22:23,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 906 places, 1595 transitions, 137922 flow [2024-01-31 16:22:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 16:22:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 16:22:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 650 transitions. [2024-01-31 16:22:23,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019305019305019 [2024-01-31 16:22:23,308 INFO L175 Difference]: Start difference. First operand has 874 places, 1460 transitions, 131084 flow. Second operand 35 states and 650 transitions. [2024-01-31 16:22:23,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 906 places, 1595 transitions, 137922 flow Killed by 15