./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c --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/popl20-figure1.wvr.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/weaver/popl20-figure1.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-figure1.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:38:22,836 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:38:22,907 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:38:22,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:38:22,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:38:22,946 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:38:22,947 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:38:22,947 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:38:22,948 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:38:22,952 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:38:22,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:38:22,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:38:22,953 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:38:22,954 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:38:22,954 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:38:22,955 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:38:22,955 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:38:22,956 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:38:22,956 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:38:22,956 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:38:22,956 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:38:22,957 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:38:22,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:38:22,958 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:38:22,958 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:38:22,958 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:38:22,958 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:38:22,959 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:38:22,959 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:38:22,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:38:22,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:38:22,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:38:22,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:38:22,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:38:22,962 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:38:22,962 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:38:22,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:38:22,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:38:22,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:38:22,963 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:38:22,963 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:38:22,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:38:22,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:38:22,964 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:38:23,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:38:23,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:38:23,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:38:23,270 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:38:23,271 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:38:23,272 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2024-02-07 14:38:24,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:38:24,628 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:38:24,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2024-02-07 14:38:24,636 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c54989a7/5a9141ef394044b5b659c58bd5e59f9b/FLAG747a3d494 [2024-02-07 14:38:24,649 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c54989a7/5a9141ef394044b5b659c58bd5e59f9b [2024-02-07 14:38:24,651 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:38:24,652 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:38:24,654 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/popl20-figure1.wvr.yml/witness.yml [2024-02-07 14:38:24,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:38:24,711 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:38:24,712 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:38:24,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:38:24,717 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:38:24,717 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:38:24" (1/2) ... [2024-02-07 14:38:24,718 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e29847d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:24, skipping insertion in model container [2024-02-07 14:38:24,718 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:38:24" (1/2) ... [2024-02-07 14:38:24,720 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7d23d593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:38:24, skipping insertion in model container [2024-02-07 14:38:24,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:24" (2/2) ... [2024-02-07 14:38:24,734 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e29847d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:24, skipping insertion in model container [2024-02-07 14:38:24,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:24" (2/2) ... [2024-02-07 14:38:24,735 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:38:24,743 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:38:24,744 INFO L76 edCorrectnessWitness]: Location invariant before [L55-L55] counter <= 2147483646 [2024-02-07 14:38:24,744 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] -2147483647 <= counter [2024-02-07 14:38:24,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:38:24,945 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[2017,2030] [2024-02-07 14:38:24,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:38:24,957 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local [2024-02-07 14:38:24,994 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c[2017,2030] [2024-02-07 14:38:24,995 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:38:25,009 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:38:25,009 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25 WrapperNode [2024-02-07 14:38:25,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:38:25,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:38:25,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:38:25,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:38:25,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,024 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,040 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-02-07 14:38:25,040 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:38:25,041 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:38:25,041 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:38:25,041 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:38:25,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,054 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,076 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 14:38:25,083 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,095 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,111 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:38:25,112 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:38:25,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:38:25,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:38:25,113 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (1/1) ... [2024-02-07 14:38:25,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:38:25,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:25,145 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 14:38:25,168 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 14:38:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:38:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:38:25,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:38:25,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:38:25,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:38:25,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:38:25,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:38:25,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:38:25,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:38:25,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:38:25,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:38:25,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:38:25,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-07 14:38:25,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-07 14:38:25,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:38:25,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:38:25,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:38:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:38:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:38:25,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:38:25,190 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 14:38:25,311 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:38:25,314 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:38:25,499 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:38:25,499 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:38:25,619 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:38:25,620 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:38:25,620 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:38:25 BoogieIcfgContainer [2024-02-07 14:38:25,620 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:38:25,622 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:38:25,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:38:25,624 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:38:25,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:38:24" (1/4) ... [2024-02-07 14:38:25,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2f0dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:38:25, skipping insertion in model container [2024-02-07 14:38:25,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:38:24" (2/4) ... [2024-02-07 14:38:25,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2f0dec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:38:25, skipping insertion in model container [2024-02-07 14:38:25,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:38:25" (3/4) ... [2024-02-07 14:38:25,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2f0dec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:38:25, skipping insertion in model container [2024-02-07 14:38:25,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:38:25" (4/4) ... [2024-02-07 14:38:25,627 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-02-07 14:38:25,642 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:38:25,642 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-02-07 14:38:25,642 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:38:25,685 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:38:25,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 25 transitions, 64 flow [2024-02-07 14:38:25,733 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2024-02-07 14:38:25,733 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:38:25,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 23 events. 2/23 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-02-07 14:38:25,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 25 transitions, 64 flow [2024-02-07 14:38:25,738 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 22 transitions, 56 flow [2024-02-07 14:38:25,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:38:25,752 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;@26ebfa74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:38:25,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-07 14:38:25,757 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:38:25,757 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-02-07 14:38:25,757 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:38:25,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:25,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:38:25,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:25,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 226773091, now seen corresponding path program 1 times [2024-02-07 14:38:25,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:25,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759595093] [2024-02-07 14:38:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:26,020 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 14:38:26,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:26,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759595093] [2024-02-07 14:38:26,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759595093] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:26,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:26,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:38:26,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065187973] [2024-02-07 14:38:26,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:26,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:26,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:26,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:26,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-07 14:38:26,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 14:38:26,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:26,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-07 14:38:26,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:26,224 INFO L124 PetriNetUnfolderBase]: 110/218 cut-off events. [2024-02-07 14:38:26,225 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-02-07 14:38:26,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 218 events. 110/218 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 773 event pairs, 40 based on Foata normal form. 9/204 useless extension candidates. Maximal degree in co-relation 363. Up to 147 conditions per place. [2024-02-07 14:38:26,229 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 23 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2024-02-07 14:38:26,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 143 flow [2024-02-07 14:38:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-02-07 14:38:26,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-02-07 14:38:26,241 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 56 flow. Second operand 3 states and 48 transitions. [2024-02-07 14:38:26,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 143 flow [2024-02-07 14:38:26,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 32 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:38:26,246 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 66 flow [2024-02-07 14:38:26,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2024-02-07 14:38:26,252 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2024-02-07 14:38:26,252 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 66 flow [2024-02-07 14:38:26,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 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 14:38:26,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:26,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:26,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:38:26,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:26,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash -186155495, now seen corresponding path program 1 times [2024-02-07 14:38:26,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:26,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202764047] [2024-02-07 14:38:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:26,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:26,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:26,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202764047] [2024-02-07 14:38:26,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202764047] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:26,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:26,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:26,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052884005] [2024-02-07 14:38:26,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:26,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:38:26,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:38:26,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:38:26,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-07 14:38:26,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 14:38:26,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:26,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-07 14:38:26,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:26,375 INFO L124 PetriNetUnfolderBase]: 93/193 cut-off events. [2024-02-07 14:38:26,375 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-02-07 14:38:26,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 193 events. 93/193 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 718 event pairs, 73 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 263. Up to 173 conditions per place. [2024-02-07 14:38:26,377 INFO L140 encePairwiseOnDemand]: 23/25 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2024-02-07 14:38:26,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 22 transitions, 100 flow [2024-02-07 14:38:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:38:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:38:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2024-02-07 14:38:26,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4533333333333333 [2024-02-07 14:38:26,379 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 66 flow. Second operand 3 states and 34 transitions. [2024-02-07 14:38:26,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 22 transitions, 100 flow [2024-02-07 14:38:26,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 22 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:26,386 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 62 flow [2024-02-07 14:38:26,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-02-07 14:38:26,389 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -1 predicate places. [2024-02-07 14:38:26,389 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 62 flow [2024-02-07 14:38:26,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 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 14:38:26,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:26,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:26,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:38:26,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:26,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1488081642, now seen corresponding path program 1 times [2024-02-07 14:38:26,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:26,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812804492] [2024-02-07 14:38:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:26,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:26,538 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 14:38:26,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:26,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812804492] [2024-02-07 14:38:26,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812804492] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:26,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:26,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:38:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755377300] [2024-02-07 14:38:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:26,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:38:26,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:38:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:38:26,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-07 14:38:26,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 14:38:26,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:26,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-07 14:38:26,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:26,681 INFO L124 PetriNetUnfolderBase]: 168/348 cut-off events. [2024-02-07 14:38:26,682 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-02-07 14:38:26,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 348 events. 168/348 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1415 event pairs, 53 based on Foata normal form. 9/348 useless extension candidates. Maximal degree in co-relation 731. Up to 120 conditions per place. [2024-02-07 14:38:26,687 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 36 selfloop transitions, 5 changer transitions 4/48 dead transitions. [2024-02-07 14:38:26,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 48 transitions, 218 flow [2024-02-07 14:38:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:38:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:38:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-02-07 14:38:26,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-02-07 14:38:26,693 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 62 flow. Second operand 4 states and 68 transitions. [2024-02-07 14:38:26,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 48 transitions, 218 flow [2024-02-07 14:38:26,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 48 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:26,696 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 103 flow [2024-02-07 14:38:26,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2024-02-07 14:38:26,699 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2024-02-07 14:38:26,700 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 103 flow [2024-02-07 14:38:26,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 14:38:26,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:26,700 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:26,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:38:26,701 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:26,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:26,702 INFO L85 PathProgramCache]: Analyzing trace with hash 489125618, now seen corresponding path program 1 times [2024-02-07 14:38:26,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:26,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795078626] [2024-02-07 14:38:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:26,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:26,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795078626] [2024-02-07 14:38:26,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795078626] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:26,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718697790] [2024-02-07 14:38:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:26,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:26,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:26,795 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 14:38:26,822 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 14:38:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:26,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2024-02-07 14:38:26,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:26,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:27,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718697790] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:27,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:27,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-02-07 14:38:27,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792307602] [2024-02-07 14:38:27,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:27,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-02-07 14:38:27,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:27,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-02-07 14:38:27,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-02-07 14:38:27,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 25 [2024-02-07 14:38:27,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 103 flow. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:38:27,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:27,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 25 [2024-02-07 14:38:27,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:27,249 INFO L124 PetriNetUnfolderBase]: 426/880 cut-off events. [2024-02-07 14:38:27,250 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2024-02-07 14:38:27,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 880 events. 426/880 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4070 event pairs, 82 based on Foata normal form. 9/880 useless extension candidates. Maximal degree in co-relation 2088. Up to 160 conditions per place. [2024-02-07 14:38:27,256 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 84 selfloop transitions, 16 changer transitions 4/107 dead transitions. [2024-02-07 14:38:27,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 107 transitions, 567 flow [2024-02-07 14:38:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:38:27,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:38:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-02-07 14:38:27,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.74 [2024-02-07 14:38:27,262 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 103 flow. Second operand 8 states and 148 transitions. [2024-02-07 14:38:27,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 107 transitions, 567 flow [2024-02-07 14:38:27,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 107 transitions, 567 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:27,268 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 258 flow [2024-02-07 14:38:27,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=258, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-02-07 14:38:27,270 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2024-02-07 14:38:27,270 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 258 flow [2024-02-07 14:38:27,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:38:27,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:27,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:27,288 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 14:38:27,485 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 14:38:27,486 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:27,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:27,486 INFO L85 PathProgramCache]: Analyzing trace with hash 268386679, now seen corresponding path program 1 times [2024-02-07 14:38:27,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:27,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705192941] [2024-02-07 14:38:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:27,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:27,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:27,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705192941] [2024-02-07 14:38:27,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705192941] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:27,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:27,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:38:27,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291302902] [2024-02-07 14:38:27,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:27,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:38:27,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:38:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:38:27,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-07 14:38:27,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 14:38:27,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:27,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-07 14:38:27,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:27,780 INFO L124 PetriNetUnfolderBase]: 577/1088 cut-off events. [2024-02-07 14:38:27,780 INFO L125 PetriNetUnfolderBase]: For 1923/1923 co-relation queries the response was YES. [2024-02-07 14:38:27,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3024 conditions, 1088 events. 577/1088 cut-off events. For 1923/1923 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4852 event pairs, 384 based on Foata normal form. 0/998 useless extension candidates. Maximal degree in co-relation 3005. Up to 963 conditions per place. [2024-02-07 14:38:27,787 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 46 selfloop transitions, 7 changer transitions 3/58 dead transitions. [2024-02-07 14:38:27,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 455 flow [2024-02-07 14:38:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:38:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:38:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-02-07 14:38:27,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504 [2024-02-07 14:38:27,788 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 258 flow. Second operand 5 states and 63 transitions. [2024-02-07 14:38:27,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 455 flow [2024-02-07 14:38:27,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 437 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:27,795 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 292 flow [2024-02-07 14:38:27,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=292, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-02-07 14:38:27,795 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2024-02-07 14:38:27,796 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 292 flow [2024-02-07 14:38:27,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 14:38:27,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:27,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:27,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:38:27,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:27,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:27,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1295533885, now seen corresponding path program 2 times [2024-02-07 14:38:27,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:27,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725099988] [2024-02-07 14:38:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:27,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:27,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:27,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725099988] [2024-02-07 14:38:27,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725099988] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:27,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:27,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:38:27,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56917616] [2024-02-07 14:38:27,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:27,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:38:27,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:27,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:38:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:38:27,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-07 14:38:27,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 292 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 14:38:27,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:27,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-07 14:38:27,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:28,127 INFO L124 PetriNetUnfolderBase]: 771/1473 cut-off events. [2024-02-07 14:38:28,128 INFO L125 PetriNetUnfolderBase]: For 3508/3508 co-relation queries the response was YES. [2024-02-07 14:38:28,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5059 conditions, 1473 events. 771/1473 cut-off events. For 3508/3508 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7316 event pairs, 68 based on Foata normal form. 62/1535 useless extension candidates. Maximal degree in co-relation 5036. Up to 939 conditions per place. [2024-02-07 14:38:28,140 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 74 selfloop transitions, 10 changer transitions 1/87 dead transitions. [2024-02-07 14:38:28,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 746 flow [2024-02-07 14:38:28,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:38:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:38:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-02-07 14:38:28,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-02-07 14:38:28,142 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 292 flow. Second operand 7 states and 84 transitions. [2024-02-07 14:38:28,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 746 flow [2024-02-07 14:38:28,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 744 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-02-07 14:38:28,149 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 372 flow [2024-02-07 14:38:28,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2024-02-07 14:38:28,150 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 34 predicate places. [2024-02-07 14:38:28,150 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 372 flow [2024-02-07 14:38:28,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 14:38:28,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:28,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:28,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:38:28,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:28,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1949499129, now seen corresponding path program 3 times [2024-02-07 14:38:28,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:28,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886325285] [2024-02-07 14:38:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:28,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:28,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:28,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886325285] [2024-02-07 14:38:28,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886325285] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:28,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:28,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:38:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316943481] [2024-02-07 14:38:28,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:38:28,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:28,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:38:28,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:38:28,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-07 14:38:28,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 372 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 14:38:28,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:28,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-07 14:38:28,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:28,512 INFO L124 PetriNetUnfolderBase]: 1055/1975 cut-off events. [2024-02-07 14:38:28,513 INFO L125 PetriNetUnfolderBase]: For 6487/6487 co-relation queries the response was YES. [2024-02-07 14:38:28,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7722 conditions, 1975 events. 1055/1975 cut-off events. For 6487/6487 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 10400 event pairs, 370 based on Foata normal form. 2/1977 useless extension candidates. Maximal degree in co-relation 7693. Up to 1042 conditions per place. [2024-02-07 14:38:28,533 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 80 selfloop transitions, 10 changer transitions 2/94 dead transitions. [2024-02-07 14:38:28,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 94 transitions, 902 flow [2024-02-07 14:38:28,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:38:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:38:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-02-07 14:38:28,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504 [2024-02-07 14:38:28,535 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 372 flow. Second operand 5 states and 63 transitions. [2024-02-07 14:38:28,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 94 transitions, 902 flow [2024-02-07 14:38:28,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 843 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:28,547 INFO L231 Difference]: Finished difference. Result has 67 places, 50 transitions, 399 flow [2024-02-07 14:38:28,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=67, PETRI_TRANSITIONS=50} [2024-02-07 14:38:28,548 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 40 predicate places. [2024-02-07 14:38:28,548 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 50 transitions, 399 flow [2024-02-07 14:38:28,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 14:38:28,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:28,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:28,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:38:28,550 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:28,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:28,550 INFO L85 PathProgramCache]: Analyzing trace with hash -35613811, now seen corresponding path program 4 times [2024-02-07 14:38:28,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:28,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034307901] [2024-02-07 14:38:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:28,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:28,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:28,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034307901] [2024-02-07 14:38:28,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034307901] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:28,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187489744] [2024-02-07 14:38:28,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:38:28,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:28,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:28,653 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 14:38:28,671 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 14:38:28,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:38:28,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:28,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-07 14:38:28,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:28,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:28,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187489744] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:28,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:28,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-02-07 14:38:28,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858684381] [2024-02-07 14:38:28,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:28,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:38:28,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:38:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:38:28,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:28,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 399 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 14:38:28,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:28,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:28,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:29,383 INFO L124 PetriNetUnfolderBase]: 2093/3669 cut-off events. [2024-02-07 14:38:29,383 INFO L125 PetriNetUnfolderBase]: For 12581/12581 co-relation queries the response was YES. [2024-02-07 14:38:29,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14719 conditions, 3669 events. 2093/3669 cut-off events. For 12581/12581 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 20264 event pairs, 192 based on Foata normal form. 62/3731 useless extension candidates. Maximal degree in co-relation 14687. Up to 937 conditions per place. [2024-02-07 14:38:29,413 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 159 selfloop transitions, 39 changer transitions 4/203 dead transitions. [2024-02-07 14:38:29,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 203 transitions, 1918 flow [2024-02-07 14:38:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:38:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:38:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 160 transitions. [2024-02-07 14:38:29,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-02-07 14:38:29,416 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 399 flow. Second operand 15 states and 160 transitions. [2024-02-07 14:38:29,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 203 transitions, 1918 flow [2024-02-07 14:38:29,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 203 transitions, 1882 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-02-07 14:38:29,435 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 709 flow [2024-02-07 14:38:29,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=709, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2024-02-07 14:38:29,439 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 59 predicate places. [2024-02-07 14:38:29,439 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 709 flow [2024-02-07 14:38:29,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 14:38:29,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:29,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:29,456 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 14:38:29,656 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,SelfDestructingSolverStorable7 [2024-02-07 14:38:29,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:29,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1764341751, now seen corresponding path program 5 times [2024-02-07 14:38:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:29,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308945331] [2024-02-07 14:38:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:29,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308945331] [2024-02-07 14:38:29,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308945331] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410589178] [2024-02-07 14:38:29,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:38:29,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:29,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:29,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:29,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 14:38:29,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:38:29,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:29,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2024-02-07 14:38:29,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:29,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:29,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410589178] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:29,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:29,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-02-07 14:38:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683124217] [2024-02-07 14:38:29,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:29,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:38:29,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:29,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:38:29,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:38:29,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:29,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 709 flow. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 14:38:29,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:29,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:29,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:30,419 INFO L124 PetriNetUnfolderBase]: 2030/3604 cut-off events. [2024-02-07 14:38:30,420 INFO L125 PetriNetUnfolderBase]: For 20731/20731 co-relation queries the response was YES. [2024-02-07 14:38:30,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16717 conditions, 3604 events. 2030/3604 cut-off events. For 20731/20731 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 20251 event pairs, 325 based on Foata normal form. 62/3666 useless extension candidates. Maximal degree in co-relation 16679. Up to 1406 conditions per place. [2024-02-07 14:38:30,456 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 123 selfloop transitions, 36 changer transitions 1/161 dead transitions. [2024-02-07 14:38:30,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 161 transitions, 1684 flow [2024-02-07 14:38:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:38:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:38:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-02-07 14:38:30,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-02-07 14:38:30,458 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 709 flow. Second operand 8 states and 96 transitions. [2024-02-07 14:38:30,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 161 transitions, 1684 flow [2024-02-07 14:38:30,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 161 transitions, 1547 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-02-07 14:38:30,499 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 830 flow [2024-02-07 14:38:30,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=830, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2024-02-07 14:38:30,500 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 67 predicate places. [2024-02-07 14:38:30,500 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 830 flow [2024-02-07 14:38:30,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 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 14:38:30,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:30,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:30,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:30,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:30,714 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:30,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:30,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2030898185, now seen corresponding path program 6 times [2024-02-07 14:38:30,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:30,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063962271] [2024-02-07 14:38:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:30,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:30,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063962271] [2024-02-07 14:38:30,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063962271] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:38:30,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:38:30,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 14:38:30,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296133540] [2024-02-07 14:38:30,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:38:30,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 14:38:30,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:30,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 14:38:30,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 14:38:30,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 25 [2024-02-07 14:38:30,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 86 transitions, 830 flow. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 14:38:30,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:30,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 25 [2024-02-07 14:38:30,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:31,172 INFO L124 PetriNetUnfolderBase]: 1670/3064 cut-off events. [2024-02-07 14:38:31,172 INFO L125 PetriNetUnfolderBase]: For 19117/19127 co-relation queries the response was YES. [2024-02-07 14:38:31,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13883 conditions, 3064 events. 1670/3064 cut-off events. For 19117/19127 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 17346 event pairs, 422 based on Foata normal form. 2/3016 useless extension candidates. Maximal degree in co-relation 13841. Up to 1619 conditions per place. [2024-02-07 14:38:31,242 INFO L140 encePairwiseOnDemand]: 19/25 looper letters, 77 selfloop transitions, 22 changer transitions 2/113 dead transitions. [2024-02-07 14:38:31,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 113 transitions, 1238 flow [2024-02-07 14:38:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:38:31,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:38:31,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-02-07 14:38:31,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.472 [2024-02-07 14:38:31,243 INFO L175 Difference]: Start difference. First operand has 94 places, 86 transitions, 830 flow. Second operand 5 states and 59 transitions. [2024-02-07 14:38:31,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 113 transitions, 1238 flow [2024-02-07 14:38:31,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 113 transitions, 1172 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-02-07 14:38:31,275 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 802 flow [2024-02-07 14:38:31,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=802, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-02-07 14:38:31,276 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 67 predicate places. [2024-02-07 14:38:31,276 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 802 flow [2024-02-07 14:38:31,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 14:38:31,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:31,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:31,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 14:38:31,277 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:31,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1279325269, now seen corresponding path program 1 times [2024-02-07 14:38:31,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:31,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154057310] [2024-02-07 14:38:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:31,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:31,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:31,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154057310] [2024-02-07 14:38:31,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154057310] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:31,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680866749] [2024-02-07 14:38:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:31,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:31,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:31,368 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:31,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 14:38:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:31,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:38:31,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:31,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:31,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680866749] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:31,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:31,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-02-07 14:38:31,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106878473] [2024-02-07 14:38:31,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:31,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:38:31,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:38:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:38:31,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:31,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 802 flow. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 14:38:31,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:31,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:31,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:32,300 INFO L124 PetriNetUnfolderBase]: 2567/4468 cut-off events. [2024-02-07 14:38:32,300 INFO L125 PetriNetUnfolderBase]: For 24363/24363 co-relation queries the response was YES. [2024-02-07 14:38:32,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20095 conditions, 4468 events. 2567/4468 cut-off events. For 24363/24363 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 25516 event pairs, 103 based on Foata normal form. 72/4512 useless extension candidates. Maximal degree in co-relation 20055. Up to 1031 conditions per place. [2024-02-07 14:38:32,332 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 143 selfloop transitions, 69 changer transitions 28/241 dead transitions. [2024-02-07 14:38:32,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 241 transitions, 2473 flow [2024-02-07 14:38:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:38:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:38:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 159 transitions. [2024-02-07 14:38:32,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424 [2024-02-07 14:38:32,335 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 802 flow. Second operand 15 states and 159 transitions. [2024-02-07 14:38:32,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 241 transitions, 2473 flow [2024-02-07 14:38:32,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 241 transitions, 2401 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-02-07 14:38:32,380 INFO L231 Difference]: Finished difference. Result has 109 places, 115 transitions, 1265 flow [2024-02-07 14:38:32,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1265, PETRI_PLACES=109, PETRI_TRANSITIONS=115} [2024-02-07 14:38:32,380 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 82 predicate places. [2024-02-07 14:38:32,381 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 115 transitions, 1265 flow [2024-02-07 14:38:32,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 14:38:32,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:32,381 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:32,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:32,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:32,600 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:32,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:32,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2047981539, now seen corresponding path program 2 times [2024-02-07 14:38:32,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:32,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379659059] [2024-02-07 14:38:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:32,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:32,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:32,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379659059] [2024-02-07 14:38:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379659059] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:32,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992677583] [2024-02-07 14:38:32,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:38:32,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:32,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:32,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:32,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 14:38:32,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:38:32,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:32,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:38:32,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:32,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:32,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992677583] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:32,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:32,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:38:32,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505479525] [2024-02-07 14:38:32,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:32,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:38:32,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:38:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:38:32,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:32,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 115 transitions, 1265 flow. Second operand has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 14:38:32,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:32,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:32,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:34,014 INFO L124 PetriNetUnfolderBase]: 4065/6825 cut-off events. [2024-02-07 14:38:34,015 INFO L125 PetriNetUnfolderBase]: For 50199/50199 co-relation queries the response was YES. [2024-02-07 14:38:34,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34523 conditions, 6825 events. 4065/6825 cut-off events. For 50199/50199 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 41086 event pairs, 418 based on Foata normal form. 48/6873 useless extension candidates. Maximal degree in co-relation 34478. Up to 1820 conditions per place. [2024-02-07 14:38:34,066 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 254 selfloop transitions, 73 changer transitions 4/332 dead transitions. [2024-02-07 14:38:34,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 332 transitions, 3762 flow [2024-02-07 14:38:34,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:38:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:38:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 177 transitions. [2024-02-07 14:38:34,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4164705882352941 [2024-02-07 14:38:34,068 INFO L175 Difference]: Start difference. First operand has 109 places, 115 transitions, 1265 flow. Second operand 17 states and 177 transitions. [2024-02-07 14:38:34,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 332 transitions, 3762 flow [2024-02-07 14:38:34,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 332 transitions, 3640 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-02-07 14:38:34,312 INFO L231 Difference]: Finished difference. Result has 128 places, 155 transitions, 1761 flow [2024-02-07 14:38:34,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1761, PETRI_PLACES=128, PETRI_TRANSITIONS=155} [2024-02-07 14:38:34,312 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 101 predicate places. [2024-02-07 14:38:34,313 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 155 transitions, 1761 flow [2024-02-07 14:38:34,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.533333333333333) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 14:38:34,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:34,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:34,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-02-07 14:38:34,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-02-07 14:38:34,527 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:34,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:34,528 INFO L85 PathProgramCache]: Analyzing trace with hash -678118695, now seen corresponding path program 3 times [2024-02-07 14:38:34,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:34,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202301295] [2024-02-07 14:38:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:34,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:34,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:34,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:34,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202301295] [2024-02-07 14:38:34,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202301295] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:34,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579011014] [2024-02-07 14:38:34,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:38:34,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:34,616 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:34,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 14:38:34,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:38:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:34,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:38:34,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:34,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:34,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579011014] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:34,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:34,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-07 14:38:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996509758] [2024-02-07 14:38:34,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:34,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:38:34,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:34,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:38:34,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:38:34,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:34,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 155 transitions, 1761 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 14:38:34,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:34,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:34,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:36,338 INFO L124 PetriNetUnfolderBase]: 5696/9556 cut-off events. [2024-02-07 14:38:36,338 INFO L125 PetriNetUnfolderBase]: For 92786/92786 co-relation queries the response was YES. [2024-02-07 14:38:36,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53059 conditions, 9556 events. 5696/9556 cut-off events. For 92786/92786 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 60818 event pairs, 247 based on Foata normal form. 252/9808 useless extension candidates. Maximal degree in co-relation 53010. Up to 2735 conditions per place. [2024-02-07 14:38:36,507 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 227 selfloop transitions, 127 changer transitions 6/361 dead transitions. [2024-02-07 14:38:36,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 361 transitions, 4297 flow [2024-02-07 14:38:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:38:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:38:36,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 179 transitions. [2024-02-07 14:38:36,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-02-07 14:38:36,509 INFO L175 Difference]: Start difference. First operand has 128 places, 155 transitions, 1761 flow. Second operand 16 states and 179 transitions. [2024-02-07 14:38:36,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 361 transitions, 4297 flow [2024-02-07 14:38:37,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 361 transitions, 4092 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-02-07 14:38:37,005 INFO L231 Difference]: Finished difference. Result has 151 places, 195 transitions, 2554 flow [2024-02-07 14:38:37,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2554, PETRI_PLACES=151, PETRI_TRANSITIONS=195} [2024-02-07 14:38:37,006 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 124 predicate places. [2024-02-07 14:38:37,006 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 195 transitions, 2554 flow [2024-02-07 14:38:37,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 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 14:38:37,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:37,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:37,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:37,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:37,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:37,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1459090479, now seen corresponding path program 4 times [2024-02-07 14:38:37,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:37,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360257857] [2024-02-07 14:38:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:37,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:37,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360257857] [2024-02-07 14:38:37,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360257857] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:37,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069853070] [2024-02-07 14:38:37,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:38:37,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:37,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:37,327 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:37,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 14:38:37,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:38:37,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:37,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:38:37,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:37,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069853070] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:37,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:37,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-07 14:38:37,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731420428] [2024-02-07 14:38:37,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:37,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:38:37,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:38:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:38:37,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:37,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 195 transitions, 2554 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:38:37,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:37,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:37,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:39,435 INFO L124 PetriNetUnfolderBase]: 6881/11525 cut-off events. [2024-02-07 14:38:39,435 INFO L125 PetriNetUnfolderBase]: For 144283/144283 co-relation queries the response was YES. [2024-02-07 14:38:39,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69830 conditions, 11525 events. 6881/11525 cut-off events. For 144283/144283 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 75377 event pairs, 293 based on Foata normal form. 208/11733 useless extension candidates. Maximal degree in co-relation 69772. Up to 1942 conditions per place. [2024-02-07 14:38:39,528 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 303 selfloop transitions, 171 changer transitions 4/479 dead transitions. [2024-02-07 14:38:39,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 479 transitions, 6100 flow [2024-02-07 14:38:39,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 14:38:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 14:38:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 268 transitions. [2024-02-07 14:38:39,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123076923076923 [2024-02-07 14:38:39,530 INFO L175 Difference]: Start difference. First operand has 151 places, 195 transitions, 2554 flow. Second operand 26 states and 268 transitions. [2024-02-07 14:38:39,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 479 transitions, 6100 flow [2024-02-07 14:38:40,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 479 transitions, 6021 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-02-07 14:38:40,377 INFO L231 Difference]: Finished difference. Result has 187 places, 239 transitions, 3733 flow [2024-02-07 14:38:40,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3733, PETRI_PLACES=187, PETRI_TRANSITIONS=239} [2024-02-07 14:38:40,378 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 160 predicate places. [2024-02-07 14:38:40,378 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 239 transitions, 3733 flow [2024-02-07 14:38:40,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:38:40,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:40,379 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:40,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:40,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:40,592 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:40,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1154039907, now seen corresponding path program 5 times [2024-02-07 14:38:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857157370] [2024-02-07 14:38:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:40,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857157370] [2024-02-07 14:38:40,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857157370] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102759113] [2024-02-07 14:38:40,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:38:40,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:40,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:40,684 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:40,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 14:38:40,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-02-07 14:38:40,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:40,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:38:40,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:40,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102759113] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:40,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:40,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-07 14:38:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300348920] [2024-02-07 14:38:40,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:40,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:38:40,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:40,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:38:40,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:38:40,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:40,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 239 transitions, 3733 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:38:40,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:40,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:40,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:42,917 INFO L124 PetriNetUnfolderBase]: 6909/11613 cut-off events. [2024-02-07 14:38:42,917 INFO L125 PetriNetUnfolderBase]: For 229881/229881 co-relation queries the response was YES. [2024-02-07 14:38:42,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80855 conditions, 11613 events. 6909/11613 cut-off events. For 229881/229881 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 77016 event pairs, 994 based on Foata normal form. 20/11633 useless extension candidates. Maximal degree in co-relation 80784. Up to 3534 conditions per place. [2024-02-07 14:38:43,014 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 280 selfloop transitions, 106 changer transitions 4/391 dead transitions. [2024-02-07 14:38:43,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 391 transitions, 5960 flow [2024-02-07 14:38:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:38:43,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:38:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 150 transitions. [2024-02-07 14:38:43,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-02-07 14:38:43,016 INFO L175 Difference]: Start difference. First operand has 187 places, 239 transitions, 3733 flow. Second operand 13 states and 150 transitions. [2024-02-07 14:38:43,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 391 transitions, 5960 flow [2024-02-07 14:38:44,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 391 transitions, 5705 flow, removed 67 selfloop flow, removed 13 redundant places. [2024-02-07 14:38:44,218 INFO L231 Difference]: Finished difference. Result has 186 places, 238 transitions, 3711 flow [2024-02-07 14:38:44,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3711, PETRI_PLACES=186, PETRI_TRANSITIONS=238} [2024-02-07 14:38:44,218 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 159 predicate places. [2024-02-07 14:38:44,219 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 238 transitions, 3711 flow [2024-02-07 14:38:44,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 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 14:38:44,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:44,219 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:44,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:44,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-02-07 14:38:44,420 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:44,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:44,420 INFO L85 PathProgramCache]: Analyzing trace with hash -216403819, now seen corresponding path program 6 times [2024-02-07 14:38:44,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:44,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145615175] [2024-02-07 14:38:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:44,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:44,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:44,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145615175] [2024-02-07 14:38:44,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145615175] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:44,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206722854] [2024-02-07 14:38:44,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:38:44,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:44,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:44,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:44,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 14:38:44,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-07 14:38:44,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:44,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:38:44,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:44,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:44,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206722854] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:44,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:44,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-02-07 14:38:44,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143788361] [2024-02-07 14:38:44,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:44,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:38:44,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:38:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:38:44,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:44,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 238 transitions, 3711 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 14:38:44,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:44,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:44,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:47,094 INFO L124 PetriNetUnfolderBase]: 8312/13866 cut-off events. [2024-02-07 14:38:47,095 INFO L125 PetriNetUnfolderBase]: For 295446/295446 co-relation queries the response was YES. [2024-02-07 14:38:47,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98899 conditions, 13866 events. 8312/13866 cut-off events. For 295446/295446 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 93105 event pairs, 475 based on Foata normal form. 176/14042 useless extension candidates. Maximal degree in co-relation 98830. Up to 2662 conditions per place. [2024-02-07 14:38:47,207 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 273 selfloop transitions, 254 changer transitions 17/545 dead transitions. [2024-02-07 14:38:47,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 545 transitions, 8313 flow [2024-02-07 14:38:47,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 14:38:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 14:38:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 256 transitions. [2024-02-07 14:38:47,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39384615384615385 [2024-02-07 14:38:47,209 INFO L175 Difference]: Start difference. First operand has 186 places, 238 transitions, 3711 flow. Second operand 26 states and 256 transitions. [2024-02-07 14:38:47,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 545 transitions, 8313 flow [2024-02-07 14:38:49,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 545 transitions, 8004 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-02-07 14:38:49,150 INFO L231 Difference]: Finished difference. Result has 206 places, 328 transitions, 5849 flow [2024-02-07 14:38:49,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5849, PETRI_PLACES=206, PETRI_TRANSITIONS=328} [2024-02-07 14:38:49,151 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 179 predicate places. [2024-02-07 14:38:49,151 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 328 transitions, 5849 flow [2024-02-07 14:38:49,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 14:38:49,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:49,151 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:49,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-02-07 14:38:49,352 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:49,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash 447084871, now seen corresponding path program 7 times [2024-02-07 14:38:49,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:49,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397695949] [2024-02-07 14:38:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:49,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:49,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:49,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397695949] [2024-02-07 14:38:49,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397695949] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:49,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745959839] [2024-02-07 14:38:49,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:38:49,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:49,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:49,425 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:49,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-07 14:38:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:49,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:38:49,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:49,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:49,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745959839] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:49,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:49,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:38:49,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668707542] [2024-02-07 14:38:49,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:49,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:38:49,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:49,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:38:49,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:38:49,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:49,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 328 transitions, 5849 flow. Second operand has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:49,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:49,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:49,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:38:53,263 INFO L124 PetriNetUnfolderBase]: 11362/19036 cut-off events. [2024-02-07 14:38:53,263 INFO L125 PetriNetUnfolderBase]: For 500299/500299 co-relation queries the response was YES. [2024-02-07 14:38:53,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147573 conditions, 19036 events. 11362/19036 cut-off events. For 500299/500299 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 135704 event pairs, 450 based on Foata normal form. 116/19152 useless extension candidates. Maximal degree in co-relation 147498. Up to 3563 conditions per place. [2024-02-07 14:38:53,652 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 391 selfloop transitions, 320 changer transitions 10/722 dead transitions. [2024-02-07 14:38:53,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 722 transitions, 12280 flow [2024-02-07 14:38:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-02-07 14:38:53,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-02-07 14:38:53,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 299 transitions. [2024-02-07 14:38:53,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124137931034483 [2024-02-07 14:38:53,654 INFO L175 Difference]: Start difference. First operand has 206 places, 328 transitions, 5849 flow. Second operand 29 states and 299 transitions. [2024-02-07 14:38:53,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 722 transitions, 12280 flow [2024-02-07 14:38:58,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 722 transitions, 11868 flow, removed 107 selfloop flow, removed 9 redundant places. [2024-02-07 14:38:58,649 INFO L231 Difference]: Finished difference. Result has 232 places, 432 transitions, 8724 flow [2024-02-07 14:38:58,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8724, PETRI_PLACES=232, PETRI_TRANSITIONS=432} [2024-02-07 14:38:58,650 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 205 predicate places. [2024-02-07 14:38:58,650 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 432 transitions, 8724 flow [2024-02-07 14:38:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.133333333333334) internal successors, (92), 15 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:38:58,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:38:58,651 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:38:58,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-07 14:38:58,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 14:38:58,860 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:38:58,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:38:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1818671229, now seen corresponding path program 8 times [2024-02-07 14:38:58,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:38:58,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300442322] [2024-02-07 14:38:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:38:58,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:38:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:38:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:58,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:38:58,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300442322] [2024-02-07 14:38:58,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300442322] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:38:58,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664350017] [2024-02-07 14:38:58,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:38:58,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:38:58,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:38:59,058 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:38:59,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-07 14:38:59,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:38:59,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:38:59,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:38:59,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:38:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:59,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:38:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:38:59,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664350017] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:38:59,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:38:59,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:38:59,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573736402] [2024-02-07 14:38:59,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:38:59,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:38:59,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:38:59,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:38:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:38:59,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:38:59,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 432 transitions, 8724 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 14:38:59,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:38:59,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:38:59,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:03,276 INFO L124 PetriNetUnfolderBase]: 12693/21151 cut-off events. [2024-02-07 14:39:03,276 INFO L125 PetriNetUnfolderBase]: For 708225/708225 co-relation queries the response was YES. [2024-02-07 14:39:03,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174346 conditions, 21151 events. 12693/21151 cut-off events. For 708225/708225 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 152335 event pairs, 4117 based on Foata normal form. 48/21199 useless extension candidates. Maximal degree in co-relation 174266. Up to 16309 conditions per place. [2024-02-07 14:39:03,470 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 570 selfloop transitions, 71 changer transitions 2/644 dead transitions. [2024-02-07 14:39:03,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 644 transitions, 12383 flow [2024-02-07 14:39:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-02-07 14:39:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-02-07 14:39:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 166 transitions. [2024-02-07 14:39:03,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-02-07 14:39:03,472 INFO L175 Difference]: Start difference. First operand has 232 places, 432 transitions, 8724 flow. Second operand 16 states and 166 transitions. [2024-02-07 14:39:03,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 644 transitions, 12383 flow [2024-02-07 14:39:13,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 644 transitions, 12182 flow, removed 48 selfloop flow, removed 11 redundant places. [2024-02-07 14:39:13,425 INFO L231 Difference]: Finished difference. Result has 242 places, 465 transitions, 9375 flow [2024-02-07 14:39:13,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8541, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9375, PETRI_PLACES=242, PETRI_TRANSITIONS=465} [2024-02-07 14:39:13,426 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 215 predicate places. [2024-02-07 14:39:13,426 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 465 transitions, 9375 flow [2024-02-07 14:39:13,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 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 14:39:13,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:39:13,426 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:39:13,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-07 14:39:13,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-07 14:39:13,627 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:39:13,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:39:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1797340329, now seen corresponding path program 9 times [2024-02-07 14:39:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:39:13,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004459272] [2024-02-07 14:39:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:39:13,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:39:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:39:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:13,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:39:13,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004459272] [2024-02-07 14:39:13,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004459272] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:39:13,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927826167] [2024-02-07 14:39:13,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:39:13,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:13,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:39:13,689 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:39:13,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-07 14:39:13,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:39:13,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:39:13,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:39:13,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:39:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:13,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:39:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:13,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927826167] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:39:13,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:39:13,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-02-07 14:39:13,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046765299] [2024-02-07 14:39:13,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:39:13,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:39:13,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:39:13,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:39:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:39:13,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:39:13,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 465 transitions, 9375 flow. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 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 14:39:13,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:39:13,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:39:13,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:18,513 INFO L124 PetriNetUnfolderBase]: 13962/23210 cut-off events. [2024-02-07 14:39:18,513 INFO L125 PetriNetUnfolderBase]: For 901391/901391 co-relation queries the response was YES. [2024-02-07 14:39:18,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199199 conditions, 23210 events. 13962/23210 cut-off events. For 901391/901391 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 168638 event pairs, 1845 based on Foata normal form. 320/23530 useless extension candidates. Maximal degree in co-relation 199112. Up to 10513 conditions per place. [2024-02-07 14:39:18,730 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 476 selfloop transitions, 250 changer transitions 7/734 dead transitions. [2024-02-07 14:39:18,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 734 transitions, 14138 flow [2024-02-07 14:39:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 14:39:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 14:39:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 225 transitions. [2024-02-07 14:39:18,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-02-07 14:39:18,732 INFO L175 Difference]: Start difference. First operand has 242 places, 465 transitions, 9375 flow. Second operand 20 states and 225 transitions. [2024-02-07 14:39:18,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 734 transitions, 14138 flow [2024-02-07 14:39:30,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 734 transitions, 13828 flow, removed 123 selfloop flow, removed 6 redundant places. [2024-02-07 14:39:30,623 INFO L231 Difference]: Finished difference. Result has 267 places, 499 transitions, 10980 flow [2024-02-07 14:39:30,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10980, PETRI_PLACES=267, PETRI_TRANSITIONS=499} [2024-02-07 14:39:30,624 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 240 predicate places. [2024-02-07 14:39:30,624 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 499 transitions, 10980 flow [2024-02-07 14:39:30,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 15 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 14:39:30,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:39:30,625 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:39:30,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-07 14:39:30,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:30,829 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:39:30,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:39:30,830 INFO L85 PathProgramCache]: Analyzing trace with hash 106806099, now seen corresponding path program 10 times [2024-02-07 14:39:30,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:39:30,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415019743] [2024-02-07 14:39:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:39:30,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:39:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:39:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:30,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:39:30,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415019743] [2024-02-07 14:39:30,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415019743] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:39:30,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263540262] [2024-02-07 14:39:30,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:39:30,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:30,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:39:30,892 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:39:30,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-07 14:39:30,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:39:30,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:39:30,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:39:30,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:39:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:31,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:39:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:39:31,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263540262] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:39:31,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:39:31,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-02-07 14:39:31,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063485657] [2024-02-07 14:39:31,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:39:31,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:39:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:39:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:39:31,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:39:31,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:39:31,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 499 transitions, 10980 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:31,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:39:31,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:39:31,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:36,332 INFO L124 PetriNetUnfolderBase]: 14676/24368 cut-off events. [2024-02-07 14:39:36,332 INFO L125 PetriNetUnfolderBase]: For 1152119/1152119 co-relation queries the response was YES. [2024-02-07 14:39:36,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224301 conditions, 24368 events. 14676/24368 cut-off events. For 1152119/1152119 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 177991 event pairs, 1867 based on Foata normal form. 176/24544 useless extension candidates. Maximal degree in co-relation 224204. Up to 9937 conditions per place. [2024-02-07 14:39:36,895 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 420 selfloop transitions, 281 changer transitions 4/706 dead transitions. [2024-02-07 14:39:36,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 706 transitions, 14920 flow [2024-02-07 14:39:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 14:39:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 14:39:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 199 transitions. [2024-02-07 14:39:36,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398 [2024-02-07 14:39:36,897 INFO L175 Difference]: Start difference. First operand has 267 places, 499 transitions, 10980 flow. Second operand 20 states and 199 transitions. [2024-02-07 14:39:36,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 706 transitions, 14920 flow [2024-02-07 14:39:47,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 706 transitions, 14623 flow, removed 133 selfloop flow, removed 3 redundant places. [2024-02-07 14:39:47,641 INFO L231 Difference]: Finished difference. Result has 290 places, 522 transitions, 12390 flow [2024-02-07 14:39:47,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10749, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=12390, PETRI_PLACES=290, PETRI_TRANSITIONS=522} [2024-02-07 14:39:47,641 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 263 predicate places. [2024-02-07 14:39:47,641 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 522 transitions, 12390 flow [2024-02-07 14:39:47,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:47,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:39:47,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:39:47,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-07 14:39:47,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-02-07 14:39:47,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-07 14:39:47,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:39:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash 2041502827, now seen corresponding path program 11 times [2024-02-07 14:39:47,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:39:47,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940273703] [2024-02-07 14:39:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:39:47,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:39:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:39:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:47,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:39:47,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940273703] [2024-02-07 14:39:47,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940273703] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:39:47,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469735394] [2024-02-07 14:39:47,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:39:47,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:39:47,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:39:47,904 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:39:47,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-07 14:39:47,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:39:47,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:39:47,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-07 14:39:47,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:39:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:48,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:39:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:39:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469735394] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:39:48,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:39:48,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-02-07 14:39:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626748663] [2024-02-07 14:39:48,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:39:48,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:39:48,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:39:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:39:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:39:48,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 25 [2024-02-07 14:39:48,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 522 transitions, 12390 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:39:48,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:39:48,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 25 [2024-02-07 14:39:48,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:39:53,763 INFO L124 PetriNetUnfolderBase]: 14678/24378 cut-off events. [2024-02-07 14:39:53,764 INFO L125 PetriNetUnfolderBase]: For 1270129/1270129 co-relation queries the response was YES. [2024-02-07 14:39:53,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234930 conditions, 24378 events. 14678/24378 cut-off events. For 1270129/1270129 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 178486 event pairs, 4976 based on Foata normal form. 18/24396 useless extension candidates. Maximal degree in co-relation 234826. Up to 19556 conditions per place. [2024-02-07 14:39:54,006 INFO L140 encePairwiseOnDemand]: 18/25 looper letters, 573 selfloop transitions, 70 changer transitions 2/646 dead transitions. [2024-02-07 14:39:54,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 646 transitions, 14999 flow [2024-02-07 14:39:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:39:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:39:54,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-02-07 14:39:54,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4509090909090909 [2024-02-07 14:39:54,007 INFO L175 Difference]: Start difference. First operand has 290 places, 522 transitions, 12390 flow. Second operand 11 states and 124 transitions. [2024-02-07 14:39:54,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 646 transitions, 14999 flow