./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_01-simple_racing.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/goblint-regression/28-race_reach_01-simple_racing.i ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_01-simple_racing.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:53:54,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:53:54,880 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:53:54,882 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:53:54,883 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:53:54,896 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:53:54,896 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:53:54,897 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:53:54,897 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:53:54,897 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:53:54,897 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:53:54,898 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:53:54,898 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:53:54,898 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:53:54,898 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:53:54,899 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:53:54,899 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:53:54,899 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:53:54,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:53:54,900 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:53:54,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:53:54,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:53:54,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:53:54,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:53:54,901 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:53:54,901 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:53:54,901 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:53:54,901 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:53:54,902 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:53:54,902 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:53:54,902 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:53:54,902 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:53:54,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:53:54,903 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:53:54,903 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:53:54,903 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:53:54,903 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:53:54,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:53:54,904 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:53:54,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:53:54,904 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:53:54,905 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:53:54,905 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:53:54,905 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:53:55,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:53:55,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:53:55,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:53:55,103 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:53:55,104 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:53:55,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/28-race_reach_01-simple_racing.yml/witness.yml [2024-02-07 14:53:55,206 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:53:55,207 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:53:55,209 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2024-02-07 14:53:56,284 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:53:56,479 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:53:56,480 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i [2024-02-07 14:53:56,490 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40dbcf6c/02e2db1832dd4cf9a04795272978e588/FLAG9f20e7863 [2024-02-07 14:53:56,505 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b40dbcf6c/02e2db1832dd4cf9a04795272978e588 [2024-02-07 14:53:56,505 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:53:56,506 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:53:56,507 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:53:56,507 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:53:56,511 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:53:56,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:53:55" (1/2) ... [2024-02-07 14:53:56,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e36292 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:53:56, skipping insertion in model container [2024-02-07 14:53:56,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:53:55" (1/2) ... [2024-02-07 14:53:56,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@405586b6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:53:56, skipping insertion in model container [2024-02-07 14:53:56,514 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:53:56" (2/2) ... [2024-02-07 14:53:56,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63e36292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56, skipping insertion in model container [2024-02-07 14:53:56,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:53:56" (2/2) ... [2024-02-07 14:53:56,515 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:53:56,537 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:53:56,538 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] (0 <= global) && (global <= 2147483646) [2024-02-07 14:53:56,538 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] 0 <= global [2024-02-07 14:53:56,538 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] (0 <= global) && (global <= 2147483646) [2024-02-07 14:53:56,538 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] 1 <= global [2024-02-07 14:53:56,539 INFO L76 edCorrectnessWitness]: Location invariant after [L709-L709] 0 <= global [2024-02-07 14:53:56,539 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] 1 <= global [2024-02-07 14:53:56,539 INFO L76 edCorrectnessWitness]: Location invariant before [L707-L707] ((((((((((((((((((((((((i == 19 || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20 [2024-02-07 14:53:56,539 INFO L76 edCorrectnessWitness]: Location invariant before [L709-L709] 0 <= global [2024-02-07 14:53:56,539 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] 1 <= global [2024-02-07 14:53:56,539 INFO L76 edCorrectnessWitness]: Location invariant after [L702-L702] 1 <= global [2024-02-07 14:53:56,539 INFO L76 edCorrectnessWitness]: Location invariant before [L702-L702] 0 <= global [2024-02-07 14:53:56,540 INFO L76 edCorrectnessWitness]: Location invariant before [L711-L711] ((((((((((((((((((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6 [2024-02-07 14:53:56,540 INFO L76 edCorrectnessWitness]: Location invariant after [L711-L711] ((((((((((((((((((((((((i == 5 || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20) || i == 19) || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6 [2024-02-07 14:53:56,540 INFO L76 edCorrectnessWitness]: Location invariant after [L707-L707] ((((((((((((((((((((((((i == 19 || i == 18) || i == 17) || i == 16) || i == 15) || i == 14) || i == 13) || i == 12) || i == 11) || i == 10) || i == 9) || i == 8) || i == 7) || i == 6) || i == 5) || i == 4) || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (25 <= i && i <= 9999)) || i == 24) || i == 23) || i == 22) || i == 21) || i == 20 [2024-02-07 14:53:56,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:53:56,843 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] [2024-02-07 14:53:56,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:53:56,872 INFO L203 MainTranslator]: Completed pre-run [2024-02-07 14:53:56,898 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_01-simple_racing.i[30176,30189] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:53:56,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:53:56,956 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:53:56,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56 WrapperNode [2024-02-07 14:53:56,957 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:53:56,958 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:53:56,958 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:53:56,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:53:56,962 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:56,972 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,004 INFO L138 Inliner]: procedures = 171, calls = 41, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2024-02-07 14:53:57,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:53:57,005 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:53:57,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:53:57,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:53:57,013 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,016 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,028 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2024-02-07 14:53:57,028 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,028 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,033 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,036 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,037 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,038 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,040 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:53:57,041 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:53:57,041 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:53:57,041 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:53:57,042 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (1/1) ... [2024-02-07 14:53:57,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:53:57,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:53:57,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 14:53:57,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 14:53:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:53:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:53:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:53:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:53:57,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-02-07 14:53:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:53:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:53:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:53:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:53:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-02-07 14:53:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-02-07 14:53:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:53:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:53:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-02-07 14:53:57,107 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-02-07 14:53:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:53:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:53:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:53:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:53:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:53:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-02-07 14:53:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-02-07 14:53:57,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:53:57,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:53:57,109 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 14:53:57,206 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:53:57,207 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:53:57,396 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:53:57,396 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:53:57,545 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:53:57,546 INFO L320 CfgBuilder]: Removed 10 assume(true) statements. [2024-02-07 14:53:57,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:53:57 BoogieIcfgContainer [2024-02-07 14:53:57,547 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:53:57,550 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:53:57,550 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:53:57,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:53:57,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:53:55" (1/4) ... [2024-02-07 14:53:57,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeda13b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:53:57, skipping insertion in model container [2024-02-07 14:53:57,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:53:56" (2/4) ... [2024-02-07 14:53:57,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeda13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:53:57, skipping insertion in model container [2024-02-07 14:53:57,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:53:56" (3/4) ... [2024-02-07 14:53:57,555 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aeda13b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:53:57, skipping insertion in model container [2024-02-07 14:53:57,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:53:57" (4/4) ... [2024-02-07 14:53:57,556 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2024-02-07 14:53:57,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:53:57,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-02-07 14:53:57,570 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:53:57,612 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-02-07 14:53:57,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 60 transitions, 127 flow [2024-02-07 14:53:57,690 INFO L124 PetriNetUnfolderBase]: 13/81 cut-off events. [2024-02-07 14:53:57,691 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:53:57,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 81 events. 13/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 280 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 53. Up to 4 conditions per place. [2024-02-07 14:53:57,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 60 transitions, 127 flow [2024-02-07 14:53:57,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 59 transitions, 125 flow [2024-02-07 14:53:57,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:53:57,722 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;@3276f17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:53:57,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2024-02-07 14:53:57,727 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:53:57,727 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-07 14:53:57,727 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:53:57,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:53:57,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:53:57,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2024-02-07 14:53:57,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:53:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash 327653004, now seen corresponding path program 1 times [2024-02-07 14:53:57,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:53:57,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750296223] [2024-02-07 14:53:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:53:57,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:53:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:53:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:53:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:53:58,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750296223] [2024-02-07 14:53:58,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750296223] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:53:58,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:53:58,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:53:58,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958654299] [2024-02-07 14:53:58,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:53:58,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:53:58,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:53:58,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:53:58,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:53:58,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-02-07 14:53:58,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 59 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:53:58,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:53:58,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-02-07 14:53:58,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:53:58,215 INFO L124 PetriNetUnfolderBase]: 33/128 cut-off events. [2024-02-07 14:53:58,216 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:53:58,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 128 events. 33/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 354 event pairs, 22 based on Foata normal form. 15/142 useless extension candidates. Maximal degree in co-relation 202. Up to 69 conditions per place. [2024-02-07 14:53:58,219 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 26 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-02-07 14:53:58,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 142 flow [2024-02-07 14:53:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:53:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:53:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-02-07 14:53:58,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-02-07 14:53:58,232 INFO L175 Difference]: Start difference. First operand has 53 places, 59 transitions, 125 flow. Second operand 4 states and 127 transitions. [2024-02-07 14:53:58,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 142 flow [2024-02-07 14:53:58,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:53:58,237 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 66 flow [2024-02-07 14:53:58,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2024-02-07 14:53:58,241 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -18 predicate places. [2024-02-07 14:53:58,241 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 66 flow [2024-02-07 14:53:58,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:53:58,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:53:58,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-02-07 14:53:58,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:53:58,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2024-02-07 14:53:58,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:53:58,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1341934591, now seen corresponding path program 1 times [2024-02-07 14:53:58,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:53:58,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292914938] [2024-02-07 14:53:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:53:58,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:53:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:53:58,286 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:53:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:53:58,317 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:53:58,317 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:53:58,319 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2024-02-07 14:53:58,320 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 13 remaining) [2024-02-07 14:53:58,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 13 remaining) [2024-02-07 14:53:58,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2024-02-07 14:53:58,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 13 remaining) [2024-02-07 14:53:58,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 13 remaining) [2024-02-07 14:53:58,321 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 13 remaining) [2024-02-07 14:53:58,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 13 remaining) [2024-02-07 14:53:58,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 13 remaining) [2024-02-07 14:53:58,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 13 remaining) [2024-02-07 14:53:58,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 13 remaining) [2024-02-07 14:53:58,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 13 remaining) [2024-02-07 14:53:58,325 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 13 remaining) [2024-02-07 14:53:58,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:53:58,330 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-07 14:53:58,332 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:53:58,332 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-07 14:53:58,352 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:53:58,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 91 transitions, 198 flow [2024-02-07 14:53:58,385 INFO L124 PetriNetUnfolderBase]: 24/146 cut-off events. [2024-02-07 14:53:58,385 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-07 14:53:58,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 146 events. 24/146 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 595 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2024-02-07 14:53:58,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 91 transitions, 198 flow [2024-02-07 14:53:58,389 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 91 transitions, 198 flow [2024-02-07 14:53:58,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:53:58,394 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;@3276f17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:53:58,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-02-07 14:53:58,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:53:58,396 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-02-07 14:53:58,396 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:53:58,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:53:58,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:53:58,397 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:53:58,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:53:58,398 INFO L85 PathProgramCache]: Analyzing trace with hash 414522628, now seen corresponding path program 1 times [2024-02-07 14:53:58,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:53:58,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535009675] [2024-02-07 14:53:58,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:53:58,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:53:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:53:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:53:58,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:53:58,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535009675] [2024-02-07 14:53:58,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535009675] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:53:58,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:53:58,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:53:58,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362760029] [2024-02-07 14:53:58,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:53:58,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:53:58,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:53:58,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:53:58,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:53:58,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 91 [2024-02-07 14:53:58,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 91 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:53:58,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:53:58,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 91 [2024-02-07 14:53:58,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:53:59,214 INFO L124 PetriNetUnfolderBase]: 3972/7650 cut-off events. [2024-02-07 14:53:59,214 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2024-02-07 14:53:59,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14025 conditions, 7650 events. 3972/7650 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 59723 event pairs, 155 based on Foata normal form. 1741/8672 useless extension candidates. Maximal degree in co-relation 11095. Up to 5949 conditions per place. [2024-02-07 14:53:59,247 INFO L140 encePairwiseOnDemand]: 72/91 looper letters, 77 selfloop transitions, 3 changer transitions 0/113 dead transitions. [2024-02-07 14:53:59,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 402 flow [2024-02-07 14:53:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:53:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:53:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 248 transitions. [2024-02-07 14:53:59,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6813186813186813 [2024-02-07 14:53:59,252 INFO L175 Difference]: Start difference. First operand has 79 places, 91 transitions, 198 flow. Second operand 4 states and 248 transitions. [2024-02-07 14:53:59,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 402 flow [2024-02-07 14:53:59,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 402 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:53:59,257 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 186 flow [2024-02-07 14:53:59,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2024-02-07 14:53:59,257 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 5 predicate places. [2024-02-07 14:53:59,258 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 186 flow [2024-02-07 14:53:59,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:53:59,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:53:59,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-02-07 14:53:59,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:53:59,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:53:59,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:53:59,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1339698070, now seen corresponding path program 1 times [2024-02-07 14:53:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:53:59,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287052781] [2024-02-07 14:53:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:53:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:53:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:53:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:53:59,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:53:59,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287052781] [2024-02-07 14:53:59,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287052781] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:53:59,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202122276] [2024-02-07 14:53:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:53:59,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:53:59,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:53:59,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:53:59,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 14:53:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:53:59,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:53:59,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:53:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:53:59,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:53:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:53:59,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202122276] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:53:59,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:53:59,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-02-07 14:53:59,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957028837] [2024-02-07 14:53:59,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:53:59,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:53:59,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:53:59,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:53:59,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:53:59,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 91 [2024-02-07 14:53:59,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:53:59,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:53:59,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 91 [2024-02-07 14:53:59,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:53:59,755 INFO L124 PetriNetUnfolderBase]: 957/1883 cut-off events. [2024-02-07 14:53:59,756 INFO L125 PetriNetUnfolderBase]: For 466/466 co-relation queries the response was YES. [2024-02-07 14:53:59,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3824 conditions, 1883 events. 957/1883 cut-off events. For 466/466 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 11784 event pairs, 0 based on Foata normal form. 288/2119 useless extension candidates. Maximal degree in co-relation 322. Up to 1224 conditions per place. [2024-02-07 14:53:59,764 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 62 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2024-02-07 14:53:59,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 330 flow [2024-02-07 14:53:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:53:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:53:59,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-02-07 14:53:59,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098901098901099 [2024-02-07 14:53:59,767 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 186 flow. Second operand 5 states and 232 transitions. [2024-02-07 14:53:59,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 330 flow [2024-02-07 14:53:59,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 324 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:53:59,771 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 128 flow [2024-02-07 14:53:59,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-02-07 14:53:59,773 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -15 predicate places. [2024-02-07 14:53:59,773 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 128 flow [2024-02-07 14:53:59,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:53:59,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:53:59,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:53:59,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-07 14:53:59,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:53:59,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:53:59,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:53:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1712470741, now seen corresponding path program 1 times [2024-02-07 14:53:59,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:53:59,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503523622] [2024-02-07 14:53:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:53:59,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:00,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:00,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503523622] [2024-02-07 14:54:00,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503523622] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:54:00,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:54:00,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:54:00,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6276571] [2024-02-07 14:54:00,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:54:00,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:54:00,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:00,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:54:00,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:54:00,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 91 [2024-02-07 14:54:00,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:00,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:00,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 91 [2024-02-07 14:54:00,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:00,215 INFO L124 PetriNetUnfolderBase]: 1260/2551 cut-off events. [2024-02-07 14:54:00,215 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-02-07 14:54:00,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4884 conditions, 2551 events. 1260/2551 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 15821 event pairs, 480 based on Foata normal form. 0/2306 useless extension candidates. Maximal degree in co-relation 3920. Up to 1973 conditions per place. [2024-02-07 14:54:00,223 INFO L140 encePairwiseOnDemand]: 86/91 looper letters, 41 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2024-02-07 14:54:00,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 250 flow [2024-02-07 14:54:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:54:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:54:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-02-07 14:54:00,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47985347985347987 [2024-02-07 14:54:00,225 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 128 flow. Second operand 3 states and 131 transitions. [2024-02-07 14:54:00,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 250 flow [2024-02-07 14:54:00,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 242 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-02-07 14:54:00,227 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 144 flow [2024-02-07 14:54:00,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-02-07 14:54:00,229 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -15 predicate places. [2024-02-07 14:54:00,229 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 144 flow [2024-02-07 14:54:00,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:00,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:00,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:54:00,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:54:00,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:54:00,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:00,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1546984936, now seen corresponding path program 1 times [2024-02-07 14:54:00,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:00,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261653925] [2024-02-07 14:54:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:00,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:00,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:00,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261653925] [2024-02-07 14:54:00,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261653925] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:54:00,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:54:00,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:54:00,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718430288] [2024-02-07 14:54:00,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:54:00,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:54:00,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:00,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:54:00,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:54:00,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 91 [2024-02-07 14:54:00,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:00,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:00,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 91 [2024-02-07 14:54:00,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:00,557 INFO L124 PetriNetUnfolderBase]: 1660/3183 cut-off events. [2024-02-07 14:54:00,557 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2024-02-07 14:54:00,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6408 conditions, 3183 events. 1660/3183 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 19837 event pairs, 336 based on Foata normal form. 0/2805 useless extension candidates. Maximal degree in co-relation 5456. Up to 1645 conditions per place. [2024-02-07 14:54:00,569 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 68 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2024-02-07 14:54:00,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 94 transitions, 396 flow [2024-02-07 14:54:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:54:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:54:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-02-07 14:54:00,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4945054945054945 [2024-02-07 14:54:00,571 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 144 flow. Second operand 4 states and 180 transitions. [2024-02-07 14:54:00,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 94 transitions, 396 flow [2024-02-07 14:54:00,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 94 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:54:00,573 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 214 flow [2024-02-07 14:54:00,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2024-02-07 14:54:00,573 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -11 predicate places. [2024-02-07 14:54:00,574 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 214 flow [2024-02-07 14:54:00,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:00,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:00,574 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-02-07 14:54:00,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:54:00,574 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 14 more)] === [2024-02-07 14:54:00,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1040330234, now seen corresponding path program 1 times [2024-02-07 14:54:00,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:00,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610310888] [2024-02-07 14:54:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:54:00,587 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-07 14:54:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-07 14:54:00,596 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-07 14:54:00,596 INFO L360 BasicCegarLoop]: Counterexample is feasible [2024-02-07 14:54:00,597 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 17 remaining) [2024-02-07 14:54:00,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (15 of 17 remaining) [2024-02-07 14:54:00,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 17 remaining) [2024-02-07 14:54:00,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (13 of 17 remaining) [2024-02-07 14:54:00,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 17 remaining) [2024-02-07 14:54:00,597 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 17 remaining) [2024-02-07 14:54:00,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 17 remaining) [2024-02-07 14:54:00,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 17 remaining) [2024-02-07 14:54:00,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (8 of 17 remaining) [2024-02-07 14:54:00,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (7 of 17 remaining) [2024-02-07 14:54:00,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (6 of 17 remaining) [2024-02-07 14:54:00,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 17 remaining) [2024-02-07 14:54:00,598 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 17 remaining) [2024-02-07 14:54:00,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 17 remaining) [2024-02-07 14:54:00,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 17 remaining) [2024-02-07 14:54:00,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 17 remaining) [2024-02-07 14:54:00,599 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 17 remaining) [2024-02-07 14:54:00,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:54:00,599 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-02-07 14:54:00,600 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-07 14:54:00,600 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-07 14:54:00,619 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-07 14:54:00,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 122 transitions, 271 flow [2024-02-07 14:54:00,636 INFO L124 PetriNetUnfolderBase]: 38/226 cut-off events. [2024-02-07 14:54:00,636 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-02-07 14:54:00,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 226 events. 38/226 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1018 event pairs, 1 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 159. Up to 12 conditions per place. [2024-02-07 14:54:00,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 122 transitions, 271 flow [2024-02-07 14:54:00,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 122 transitions, 271 flow [2024-02-07 14:54:00,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:54:00,640 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;@3276f17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:54:00,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2024-02-07 14:54:00,642 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:54:00,642 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-02-07 14:54:00,642 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:54:00,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:00,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:54:00,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 18 more)] === [2024-02-07 14:54:00,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:00,643 INFO L85 PathProgramCache]: Analyzing trace with hash 530975707, now seen corresponding path program 1 times [2024-02-07 14:54:00,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:00,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822462115] [2024-02-07 14:54:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:00,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:00,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:00,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822462115] [2024-02-07 14:54:00,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822462115] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:54:00,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:54:00,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:54:00,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430213363] [2024-02-07 14:54:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:54:00,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:54:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:00,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:54:00,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:54:00,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 122 [2024-02-07 14:54:00,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 122 transitions, 271 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:00,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:00,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 122 [2024-02-07 14:54:00,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:09,779 INFO L124 PetriNetUnfolderBase]: 77072/128337 cut-off events. [2024-02-07 14:54:09,780 INFO L125 PetriNetUnfolderBase]: For 2505/2505 co-relation queries the response was YES. [2024-02-07 14:54:09,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236578 conditions, 128337 events. 77072/128337 cut-off events. For 2505/2505 co-relation queries the response was YES. Maximal size of possible extension queue 3022. Compared 1216569 event pairs, 23704 based on Foata normal form. 31978/152769 useless extension candidates. Maximal degree in co-relation 14838. Up to 106757 conditions per place. [2024-02-07 14:54:10,495 INFO L140 encePairwiseOnDemand]: 97/122 looper letters, 91 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2024-02-07 14:54:10,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 493 flow [2024-02-07 14:54:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:54:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:54:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2024-02-07 14:54:10,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6475409836065574 [2024-02-07 14:54:10,498 INFO L175 Difference]: Start difference. First operand has 105 places, 122 transitions, 271 flow. Second operand 4 states and 316 transitions. [2024-02-07 14:54:10,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 493 flow [2024-02-07 14:54:10,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 139 transitions, 493 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:54:10,502 INFO L231 Difference]: Finished difference. Result has 110 places, 103 transitions, 251 flow [2024-02-07 14:54:10,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=110, PETRI_TRANSITIONS=103} [2024-02-07 14:54:10,502 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 5 predicate places. [2024-02-07 14:54:10,503 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 103 transitions, 251 flow [2024-02-07 14:54:10,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:10,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:10,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:54:10,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:54:10,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 18 more)] === [2024-02-07 14:54:10,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash 890004674, now seen corresponding path program 1 times [2024-02-07 14:54:10,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:10,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236139717] [2024-02-07 14:54:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:10,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:10,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:10,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236139717] [2024-02-07 14:54:10,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236139717] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:54:10,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:54:10,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:54:10,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118112074] [2024-02-07 14:54:10,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:54:10,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:54:10,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:10,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:54:10,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:54:10,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 122 [2024-02-07 14:54:10,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 103 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:10,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:10,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 122 [2024-02-07 14:54:10,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:22,681 INFO L124 PetriNetUnfolderBase]: 120371/192279 cut-off events. [2024-02-07 14:54:22,681 INFO L125 PetriNetUnfolderBase]: For 13777/13777 co-relation queries the response was YES. [2024-02-07 14:54:23,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369143 conditions, 192279 events. 120371/192279 cut-off events. For 13777/13777 co-relation queries the response was YES. Maximal size of possible extension queue 4431. Compared 1784315 event pairs, 61627 based on Foata normal form. 0/164829 useless extension candidates. Maximal degree in co-relation 255673. Up to 165021 conditions per place. [2024-02-07 14:54:23,936 INFO L140 encePairwiseOnDemand]: 114/122 looper letters, 86 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2024-02-07 14:54:23,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 129 transitions, 508 flow [2024-02-07 14:54:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:54:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:54:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2024-02-07 14:54:23,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5655737704918032 [2024-02-07 14:54:23,938 INFO L175 Difference]: Start difference. First operand has 110 places, 103 transitions, 251 flow. Second operand 3 states and 207 transitions. [2024-02-07 14:54:23,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 129 transitions, 508 flow [2024-02-07 14:54:23,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 129 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:54:23,945 INFO L231 Difference]: Finished difference. Result has 113 places, 106 transitions, 283 flow [2024-02-07 14:54:23,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=283, PETRI_PLACES=113, PETRI_TRANSITIONS=106} [2024-02-07 14:54:23,946 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 8 predicate places. [2024-02-07 14:54:23,946 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 106 transitions, 283 flow [2024-02-07 14:54:23,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:23,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:23,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-02-07 14:54:23,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 14:54:23,946 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 18 more)] === [2024-02-07 14:54:23,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:23,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2068606390, now seen corresponding path program 1 times [2024-02-07 14:54:23,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:23,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089041187] [2024-02-07 14:54:23,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:23,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:24,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:24,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089041187] [2024-02-07 14:54:24,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089041187] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:54:24,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029181561] [2024-02-07 14:54:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:24,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:54:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:54:24,002 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:54:24,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 14:54:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:24,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2024-02-07 14:54:24,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:54:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:24,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:54:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:24,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029181561] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:54:24,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:54:24,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2024-02-07 14:54:24,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940147092] [2024-02-07 14:54:24,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:54:24,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:54:24,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:24,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:54:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:54:24,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 122 [2024-02-07 14:54:24,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 106 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:24,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:24,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 122 [2024-02-07 14:54:24,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:54:33,459 INFO L124 PetriNetUnfolderBase]: 83108/135048 cut-off events. [2024-02-07 14:54:33,460 INFO L125 PetriNetUnfolderBase]: For 19921/26843 co-relation queries the response was YES. [2024-02-07 14:54:33,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271233 conditions, 135048 events. 83108/135048 cut-off events. For 19921/26843 co-relation queries the response was YES. Maximal size of possible extension queue 3443. Compared 1272512 event pairs, 4726 based on Foata normal form. 288/128338 useless extension candidates. Maximal degree in co-relation 196650. Up to 108427 conditions per place. [2024-02-07 14:54:34,329 INFO L140 encePairwiseOnDemand]: 118/122 looper letters, 133 selfloop transitions, 4 changer transitions 0/182 dead transitions. [2024-02-07 14:54:34,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 182 transitions, 737 flow [2024-02-07 14:54:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:54:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:54:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 356 transitions. [2024-02-07 14:54:34,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5836065573770491 [2024-02-07 14:54:34,331 INFO L175 Difference]: Start difference. First operand has 113 places, 106 transitions, 283 flow. Second operand 5 states and 356 transitions. [2024-02-07 14:54:34,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 182 transitions, 737 flow [2024-02-07 14:54:34,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 182 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:54:34,349 INFO L231 Difference]: Finished difference. Result has 117 places, 106 transitions, 293 flow [2024-02-07 14:54:34,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=117, PETRI_TRANSITIONS=106} [2024-02-07 14:54:34,349 INFO L281 CegarLoopForPetriNet]: 105 programPoint places, 12 predicate places. [2024-02-07 14:54:34,350 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 106 transitions, 293 flow [2024-02-07 14:54:34,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:34,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:54:34,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:54:34,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-07 14:54:34,561 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,SelfDestructingSolverStorable9 [2024-02-07 14:54:34,562 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 18 more)] === [2024-02-07 14:54:34,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:54:34,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1820341781, now seen corresponding path program 1 times [2024-02-07 14:54:34,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:54:34,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185008631] [2024-02-07 14:54:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:54:34,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:54:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:54:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:54:34,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:54:34,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185008631] [2024-02-07 14:54:34,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185008631] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:54:34,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:54:34,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:54:34,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746865545] [2024-02-07 14:54:34,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:54:34,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:54:34,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:54:34,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:54:34,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:54:34,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 122 [2024-02-07 14:54:34,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 106 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:54:34,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:54:34,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 122 [2024-02-07 14:54:34,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand