./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-comm.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/mult-comm.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-comm.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-dev-958ec4d-m [2024-02-07 14:33:19,512 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:33:19,579 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:33:19,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:33:19,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:33:19,609 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:33:19,610 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:33:19,610 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:33:19,610 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:33:19,613 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:33:19,614 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:33:19,614 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:33:19,614 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:33:19,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:33:19,615 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:33:19,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:33:19,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:33:19,616 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:33:19,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:33:19,616 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:33:19,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:33:19,617 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:33:19,617 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:33:19,617 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:33:19,618 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:33:19,618 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:33:19,618 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:33:19,618 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:33:19,619 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:33:19,619 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:33:19,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:33:19,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:33:19,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:33:19,620 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:33:19,620 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:33:19,621 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:33:19,621 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:33:19,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:33:19,621 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:33:19,621 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:33:19,621 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:33:19,622 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:33:19,622 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:33:19,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:33:19,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:33:19,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:33:19,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:33:19,827 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:33:19,827 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:33:19,828 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2024-02-07 14:33:20,908 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:33:21,100 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:33:21,101 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2024-02-07 14:33:21,106 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed294098/636b8b634a074d79b44ee0da3288db7d/FLAG04744678e [2024-02-07 14:33:21,522 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed294098/636b8b634a074d79b44ee0da3288db7d [2024-02-07 14:33:21,524 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:33:21,525 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:33:21,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-comm.wvr.yml/witness.yml [2024-02-07 14:33:21,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:33:21,585 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:33:21,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:33:21,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:33:21,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:33:21,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:33:21" (1/2) ... [2024-02-07 14:33:21,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c65b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:33:21, skipping insertion in model container [2024-02-07 14:33:21,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:33:21" (1/2) ... [2024-02-07 14:33:21,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2b90bf4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:33:21, skipping insertion in model container [2024-02-07 14:33:21,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:33:21" (2/2) ... [2024-02-07 14:33:21,594 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c65b50 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:33:21, skipping insertion in model container [2024-02-07 14:33:21,594 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:33:21" (2/2) ... [2024-02-07 14:33:21,595 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:33:21,611 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:33:21,615 INFO L76 edCorrectnessWitness]: Location invariant before [L61-L61] ((((0LL - (long long )a) + (long long )b >= 0LL) && ((long long )a + (long long )b >= 0LL)) && ((0LL - (long long )a) - (long long )b >= 0LL)) && ((long long )a - (long long )b >= 0LL) [2024-02-07 14:33:21,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:33:21,789 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1936,1949] [2024-02-07 14:33:21,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:33:21,799 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 14:33:21,840 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c[1936,1949] [2024-02-07 14:33:21,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:33:21,858 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:33:21,860 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:33:21 WrapperNode [2024-02-07 14:33:21,860 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:33:21,861 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:33:21,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:33:21,861 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:33:21,866 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,873 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,906 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2024-02-07 14:33:21,907 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:33:21,908 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:33:21,908 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:33:21,908 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:33:21,916 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,917 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,924 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,941 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 14:33:21,941 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,941 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,954 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,957 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,960 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,961 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,964 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:33:21,965 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:33:21,966 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:33:21,966 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:33:21,967 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 02:33:21" (1/1) ... [2024-02-07 14:33:21,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:33:21,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:22,002 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 14:33:22,019 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 14:33:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:33:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:33:22,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:33:22,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:33:22,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:33:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:33:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:33:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:33:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:33:22,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:33:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:33:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:33:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:33:22,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:33:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:33:22,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:33:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:33:22,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:33:22,036 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 14:33:22,134 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:33:22,136 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:33:22,330 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:33:22,331 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:33:22,425 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:33:22,426 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-02-07 14:33:22,426 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:33:22 BoogieIcfgContainer [2024-02-07 14:33:22,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:33:22,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:33:22,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:33:22,439 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:33:22,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:33:21" (1/4) ... [2024-02-07 14:33:22,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294e6440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:33:22, skipping insertion in model container [2024-02-07 14:33:22,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:33:21" (2/4) ... [2024-02-07 14:33:22,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294e6440 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:33:22, skipping insertion in model container [2024-02-07 14:33:22,441 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 02:33:21" (3/4) ... [2024-02-07 14:33:22,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294e6440 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:33:22, skipping insertion in model container [2024-02-07 14:33:22,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:33:22" (4/4) ... [2024-02-07 14:33:22,442 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2024-02-07 14:33:22,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:33:22,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 14:33:22,456 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:33:22,512 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:33:22,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-02-07 14:33:22,560 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-02-07 14:33:22,560 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:33:22,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-02-07 14:33:22,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-02-07 14:33:22,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-02-07 14:33:22,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:33:22,577 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;@2baa73f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:33:22,577 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-07 14:33:22,579 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:33:22,579 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:33:22,579 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:33:22,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:22,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:33:22,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:22,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash 6722, now seen corresponding path program 1 times [2024-02-07 14:33:22,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:22,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671992921] [2024-02-07 14:33:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:22,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:22,871 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 14:33:22,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:22,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671992921] [2024-02-07 14:33:22,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671992921] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:22,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:22,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:33:22,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475037462] [2024-02-07 14:33:22,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:22,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:33:22,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:22,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:33:22,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:33:22,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-07 14:33:22,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 14:33:22,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:22,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-07 14:33:22,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:22,953 INFO L124 PetriNetUnfolderBase]: 40/75 cut-off events. [2024-02-07 14:33:22,953 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-07 14:33:22,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 75 events. 40/75 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 127 event pairs, 24 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 120. Up to 74 conditions per place. [2024-02-07 14:33:22,955 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 14 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2024-02-07 14:33:22,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 78 flow [2024-02-07 14:33:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:33:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:33:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2024-02-07 14:33:22,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-02-07 14:33:22,965 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 26 transitions. [2024-02-07 14:33:22,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 78 flow [2024-02-07 14:33:22,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 70 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:33:22,969 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 42 flow [2024-02-07 14:33:22,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2024-02-07 14:33:22,972 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2024-02-07 14:33:22,973 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 42 flow [2024-02-07 14:33:22,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 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 14:33:22,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:22,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:22,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:33:22,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:22,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:22,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1089556863, now seen corresponding path program 1 times [2024-02-07 14:33:22,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:22,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676734111] [2024-02-07 14:33:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:22,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:23,192 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 14:33:23,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:23,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676734111] [2024-02-07 14:33:23,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676734111] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:23,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:23,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:33:23,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409359291] [2024-02-07 14:33:23,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:23,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:33:23,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:23,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:33:23,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:33:23,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:23,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 14:33:23,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:23,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:23,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:23,269 INFO L124 PetriNetUnfolderBase]: 74/136 cut-off events. [2024-02-07 14:33:23,270 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-07 14:33:23,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 136 events. 74/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 273. Up to 79 conditions per place. [2024-02-07 14:33:23,273 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 24 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2024-02-07 14:33:23,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 29 transitions, 125 flow [2024-02-07 14:33:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:33:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:33:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-02-07 14:33:23,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-02-07 14:33:23,277 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 42 flow. Second operand 3 states and 41 transitions. [2024-02-07 14:33:23,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 29 transitions, 125 flow [2024-02-07 14:33:23,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 121 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:33:23,279 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 57 flow [2024-02-07 14:33:23,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2024-02-07 14:33:23,280 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -2 predicate places. [2024-02-07 14:33:23,281 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 57 flow [2024-02-07 14:33:23,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 14:33:23,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:23,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:23,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:33:23,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:23,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:23,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1701747972, now seen corresponding path program 1 times [2024-02-07 14:33:23,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:23,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953758543] [2024-02-07 14:33:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:23,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:23,663 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 14:33:23,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:23,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953758543] [2024-02-07 14:33:23,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953758543] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:23,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114897863] [2024-02-07 14:33:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:23,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:23,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:23,666 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 14:33:23,711 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 14:33:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:23,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:33:23,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:23,908 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 14:33:23,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:24,126 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 14:33:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114897863] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:24,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:24,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2024-02-07 14:33:24,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128315168] [2024-02-07 14:33:24,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:33:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:33:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:33:24,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:24,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 57 flow. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 14:33:24,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:24,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:24,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:24,324 INFO L124 PetriNetUnfolderBase]: 76/145 cut-off events. [2024-02-07 14:33:24,324 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-07 14:33:24,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 145 events. 76/145 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 397 event pairs, 14 based on Foata normal form. 1/146 useless extension candidates. Maximal degree in co-relation 116. Up to 76 conditions per place. [2024-02-07 14:33:24,327 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 26 selfloop transitions, 6 changer transitions 14/47 dead transitions. [2024-02-07 14:33:24,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 220 flow [2024-02-07 14:33:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:33:24,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:33:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-02-07 14:33:24,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-02-07 14:33:24,330 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 57 flow. Second operand 8 states and 79 transitions. [2024-02-07 14:33:24,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 220 flow [2024-02-07 14:33:24,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 47 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:33:24,332 INFO L231 Difference]: Finished difference. Result has 30 places, 21 transitions, 84 flow [2024-02-07 14:33:24,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=84, PETRI_PLACES=30, PETRI_TRANSITIONS=21} [2024-02-07 14:33:24,333 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 7 predicate places. [2024-02-07 14:33:24,333 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 21 transitions, 84 flow [2024-02-07 14:33:24,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 14:33:24,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:24,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:24,348 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 14:33:24,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:24,546 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:24,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:24,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1759629352, now seen corresponding path program 2 times [2024-02-07 14:33:24,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:24,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107296013] [2024-02-07 14:33:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:24,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:24,735 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 14:33:24,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:24,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107296013] [2024-02-07 14:33:24,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107296013] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:24,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651878285] [2024-02-07 14:33:24,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:33:24,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:24,737 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 14:33:24,767 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 14:33:24,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:33:24,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:24,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:33:24,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:24,863 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 14:33:24,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:24,942 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 14:33:24,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651878285] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:24,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:24,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 11 [2024-02-07 14:33:24,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518542881] [2024-02-07 14:33:24,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:24,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:33:24,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:24,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:33:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:33:24,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:24,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 21 transitions, 84 flow. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:33:24,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:24,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:24,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:25,098 INFO L124 PetriNetUnfolderBase]: 125/236 cut-off events. [2024-02-07 14:33:25,099 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-02-07 14:33:25,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 236 events. 125/236 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 783 event pairs, 19 based on Foata normal form. 3/239 useless extension candidates. Maximal degree in co-relation 623. Up to 96 conditions per place. [2024-02-07 14:33:25,100 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 41 selfloop transitions, 18 changer transitions 12/72 dead transitions. [2024-02-07 14:33:25,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 72 transitions, 371 flow [2024-02-07 14:33:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:33:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:33:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-02-07 14:33:25,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-02-07 14:33:25,102 INFO L175 Difference]: Start difference. First operand has 30 places, 21 transitions, 84 flow. Second operand 11 states and 117 transitions. [2024-02-07 14:33:25,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 72 transitions, 371 flow [2024-02-07 14:33:25,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 72 transitions, 354 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-02-07 14:33:25,104 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 184 flow [2024-02-07 14:33:25,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=184, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2024-02-07 14:33:25,105 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 16 predicate places. [2024-02-07 14:33:25,105 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 184 flow [2024-02-07 14:33:25,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 12 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:33:25,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:25,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:25,117 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 14:33:25,317 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,SelfDestructingSolverStorable3 [2024-02-07 14:33:25,318 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:25,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:25,318 INFO L85 PathProgramCache]: Analyzing trace with hash 55385341, now seen corresponding path program 1 times [2024-02-07 14:33:25,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:25,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643167607] [2024-02-07 14:33:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:25,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:25,444 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 14:33:25,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:25,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643167607] [2024-02-07 14:33:25,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643167607] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:25,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614563599] [2024-02-07 14:33:25,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:25,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:25,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:25,447 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 14:33:25,473 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 14:33:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:25,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:33:25,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:25,571 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 14:33:25,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:25,709 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 14:33:25,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614563599] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:25,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:25,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2024-02-07 14:33:25,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409127191] [2024-02-07 14:33:25,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:25,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:33:25,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:25,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:33:25,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:33:25,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:25,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 184 flow. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 14:33:25,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:25,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:25,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:25,828 INFO L124 PetriNetUnfolderBase]: 131/251 cut-off events. [2024-02-07 14:33:25,828 INFO L125 PetriNetUnfolderBase]: For 282/282 co-relation queries the response was YES. [2024-02-07 14:33:25,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 251 events. 131/251 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 885 event pairs, 25 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 783. Up to 191 conditions per place. [2024-02-07 14:33:25,830 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 34 selfloop transitions, 7 changer transitions 14/56 dead transitions. [2024-02-07 14:33:25,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 372 flow [2024-02-07 14:33:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:33:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:33:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 75 transitions. [2024-02-07 14:33:25,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-02-07 14:33:25,831 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 184 flow. Second operand 8 states and 75 transitions. [2024-02-07 14:33:25,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 372 flow [2024-02-07 14:33:25,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 316 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-02-07 14:33:25,834 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 169 flow [2024-02-07 14:33:25,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=169, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-02-07 14:33:25,835 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 21 predicate places. [2024-02-07 14:33:25,835 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 169 flow [2024-02-07 14:33:25,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 14:33:25,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:25,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:25,863 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 14:33:26,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:26,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:26,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1323864457, now seen corresponding path program 2 times [2024-02-07 14:33:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:26,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223350291] [2024-02-07 14:33:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:26,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:26,231 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 14:33:26,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223350291] [2024-02-07 14:33:26,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223350291] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:26,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961472757] [2024-02-07 14:33:26,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:33:26,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:26,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:26,233 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 14:33:26,257 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 14:33:26,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:33:26,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:26,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:33:26,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:26,346 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 14:33:26,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:26,511 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 14:33:26,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961472757] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:26,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:26,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2024-02-07 14:33:26,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451599833] [2024-02-07 14:33:26,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:26,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:33:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:33:26,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:33:26,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:26,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 169 flow. Second operand has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 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 14:33:26,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:26,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:26,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:26,668 INFO L124 PetriNetUnfolderBase]: 145/272 cut-off events. [2024-02-07 14:33:26,668 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2024-02-07 14:33:26,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 272 events. 145/272 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 957 event pairs, 27 based on Foata normal form. 2/274 useless extension candidates. Maximal degree in co-relation 838. Up to 207 conditions per place. [2024-02-07 14:33:26,670 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 44 selfloop transitions, 15 changer transitions 4/64 dead transitions. [2024-02-07 14:33:26,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 402 flow [2024-02-07 14:33:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:33:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:33:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 92 transitions. [2024-02-07 14:33:26,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-02-07 14:33:26,672 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 169 flow. Second operand 10 states and 92 transitions. [2024-02-07 14:33:26,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 402 flow [2024-02-07 14:33:26,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 393 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-02-07 14:33:26,676 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 236 flow [2024-02-07 14:33:26,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=236, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-02-07 14:33:26,679 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 27 predicate places. [2024-02-07 14:33:26,679 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 236 flow [2024-02-07 14:33:26,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.833333333333333) internal successors, (82), 12 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 14:33:26,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:26,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:26,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-07 14:33:26,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:26,891 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:26,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2037639130, now seen corresponding path program 3 times [2024-02-07 14:33:26,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:26,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16189582] [2024-02-07 14:33:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:26,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:27,057 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 14:33:27,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16189582] [2024-02-07 14:33:27,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16189582] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850195404] [2024-02-07 14:33:27,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:33:27,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:27,060 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 14:33:27,118 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 14:33:27,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:33:27,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:27,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:33:27,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:27,206 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 14:33:27,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:27,350 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 14:33:27,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850195404] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:27,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:27,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2024-02-07 14:33:27,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215462989] [2024-02-07 14:33:27,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:27,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:33:27,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:27,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:33:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:33:27,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:27,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 236 flow. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 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 14:33:27,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:27,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:27,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:27,496 INFO L124 PetriNetUnfolderBase]: 177/328 cut-off events. [2024-02-07 14:33:27,497 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2024-02-07 14:33:27,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 328 events. 177/328 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1237 event pairs, 21 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 1089. Up to 214 conditions per place. [2024-02-07 14:33:27,499 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 43 selfloop transitions, 25 changer transitions 8/77 dead transitions. [2024-02-07 14:33:27,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 524 flow [2024-02-07 14:33:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:33:27,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:33:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2024-02-07 14:33:27,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-02-07 14:33:27,501 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 236 flow. Second operand 10 states and 94 transitions. [2024-02-07 14:33:27,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 524 flow [2024-02-07 14:33:27,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 77 transitions, 477 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-02-07 14:33:27,507 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 351 flow [2024-02-07 14:33:27,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=351, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-02-07 14:33:27,508 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 34 predicate places. [2024-02-07 14:33:27,508 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 351 flow [2024-02-07 14:33:27,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 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 14:33:27,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:27,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:27,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 14:33:27,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:27,733 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:27,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:27,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1790127341, now seen corresponding path program 3 times [2024-02-07 14:33:27,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:27,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075727619] [2024-02-07 14:33:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:27,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:27,915 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 14:33:27,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:27,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075727619] [2024-02-07 14:33:27,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075727619] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:27,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655238813] [2024-02-07 14:33:27,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:33:27,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:27,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:27,918 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 14:33:27,945 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 14:33:27,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:33:27,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:27,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:33:27,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:28,051 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 14:33:28,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 14:33:28,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655238813] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:28,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:33:28,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 6] total 12 [2024-02-07 14:33:28,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202811613] [2024-02-07 14:33:28,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:28,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:33:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:33:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:33:28,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:28,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 351 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 14:33:28,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:28,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:28,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:28,222 INFO L124 PetriNetUnfolderBase]: 193/357 cut-off events. [2024-02-07 14:33:28,222 INFO L125 PetriNetUnfolderBase]: For 768/768 co-relation queries the response was YES. [2024-02-07 14:33:28,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1376 conditions, 357 events. 193/357 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1368 event pairs, 53 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1315. Up to 312 conditions per place. [2024-02-07 14:33:28,224 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 54 selfloop transitions, 10 changer transitions 2/67 dead transitions. [2024-02-07 14:33:28,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 548 flow [2024-02-07 14:33:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 14:33:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 14:33:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-02-07 14:33:28,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-02-07 14:33:28,225 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 351 flow. Second operand 5 states and 53 transitions. [2024-02-07 14:33:28,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 548 flow [2024-02-07 14:33:28,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 67 transitions, 506 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-02-07 14:33:28,229 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 384 flow [2024-02-07 14:33:28,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-02-07 14:33:28,231 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 34 predicate places. [2024-02-07 14:33:28,231 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 384 flow [2024-02-07 14:33:28,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 14:33:28,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:28,232 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 14:33:28,249 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 14:33:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:28,443 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:28,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1999686262, now seen corresponding path program 1 times [2024-02-07 14:33:28,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:28,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266879838] [2024-02-07 14:33:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:28,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:28,787 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 14:33:28,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:28,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266879838] [2024-02-07 14:33:28,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266879838] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:28,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920868387] [2024-02-07 14:33:28,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:28,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:28,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:28,789 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 14:33:28,816 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 14:33:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:28,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-07 14:33:28,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:29,133 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 14:33:29,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:29,500 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 14:33:29,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920868387] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:29,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:29,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2024-02-07 14:33:29,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357621053] [2024-02-07 14:33:29,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-02-07 14:33:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:29,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-02-07 14:33:29,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2024-02-07 14:33:29,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:29,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 384 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 14:33:29,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:29,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:29,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:34,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-02-07 14:33:34,410 INFO L124 PetriNetUnfolderBase]: 264/508 cut-off events. [2024-02-07 14:33:34,410 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2024-02-07 14:33:34,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 508 events. 264/508 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2302 event pairs, 23 based on Foata normal form. 3/509 useless extension candidates. Maximal degree in co-relation 1868. Up to 220 conditions per place. [2024-02-07 14:33:34,413 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 86 selfloop transitions, 50 changer transitions 35/172 dead transitions. [2024-02-07 14:33:34,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 172 transitions, 1231 flow [2024-02-07 14:33:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-02-07 14:33:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-02-07 14:33:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 243 transitions. [2024-02-07 14:33:34,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46285714285714286 [2024-02-07 14:33:34,415 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 384 flow. Second operand 25 states and 243 transitions. [2024-02-07 14:33:34,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 172 transitions, 1231 flow [2024-02-07 14:33:34,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 172 transitions, 1209 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-02-07 14:33:34,420 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 697 flow [2024-02-07 14:33:34,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=697, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2024-02-07 14:33:34,421 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 66 predicate places. [2024-02-07 14:33:34,421 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 697 flow [2024-02-07 14:33:34,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 14:33:34,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:34,421 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 14:33:34,447 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 14:33:34,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:34,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:34,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1600055690, now seen corresponding path program 2 times [2024-02-07 14:33:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:34,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563546825] [2024-02-07 14:33:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:34,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:34,999 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 14:33:35,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:35,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563546825] [2024-02-07 14:33:35,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563546825] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:35,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318151070] [2024-02-07 14:33:35,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:33:35,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:35,001 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:33:35,007 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 14:33:35,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:33:35,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:35,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-07 14:33:35,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:35,247 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 14:33:35,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:35,655 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 14:33:35,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318151070] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:35,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:35,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2024-02-07 14:33:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585354272] [2024-02-07 14:33:35,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:35,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 14:33:35,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 14:33:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-02-07 14:33:35,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:35,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 697 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 14:33:35,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:35,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:35,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:36,890 INFO L124 PetriNetUnfolderBase]: 301/613 cut-off events. [2024-02-07 14:33:36,890 INFO L125 PetriNetUnfolderBase]: For 2763/2763 co-relation queries the response was YES. [2024-02-07 14:33:36,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2974 conditions, 613 events. 301/613 cut-off events. For 2763/2763 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3092 event pairs, 19 based on Foata normal form. 3/616 useless extension candidates. Maximal degree in co-relation 2846. Up to 224 conditions per place. [2024-02-07 14:33:36,894 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 99 selfloop transitions, 79 changer transitions 22/201 dead transitions. [2024-02-07 14:33:36,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 201 transitions, 1845 flow [2024-02-07 14:33:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-02-07 14:33:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-02-07 14:33:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 291 transitions. [2024-02-07 14:33:36,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470046082949309 [2024-02-07 14:33:36,896 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 697 flow. Second operand 31 states and 291 transitions. [2024-02-07 14:33:36,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 201 transitions, 1845 flow [2024-02-07 14:33:36,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 201 transitions, 1658 flow, removed 78 selfloop flow, removed 11 redundant places. [2024-02-07 14:33:36,906 INFO L231 Difference]: Finished difference. Result has 110 places, 112 transitions, 1123 flow [2024-02-07 14:33:36,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1123, PETRI_PLACES=110, PETRI_TRANSITIONS=112} [2024-02-07 14:33:36,907 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 87 predicate places. [2024-02-07 14:33:36,908 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 112 transitions, 1123 flow [2024-02-07 14:33:36,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 14:33:36,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:36,908 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 14:33:36,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-02-07 14:33:37,119 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,SelfDestructingSolverStorable9 [2024-02-07 14:33:37,119 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:37,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:37,121 INFO L85 PathProgramCache]: Analyzing trace with hash -118288016, now seen corresponding path program 3 times [2024-02-07 14:33:37,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:37,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455558976] [2024-02-07 14:33:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:37,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:37,481 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 14:33:37,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455558976] [2024-02-07 14:33:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455558976] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395676255] [2024-02-07 14:33:37,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:33:37,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:37,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:37,493 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 14:33:37,495 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 14:33:37,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 14:33:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:37,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2024-02-07 14:33:37,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:37,766 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 14:33:37,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:38,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395676255] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:38,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:38,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2024-02-07 14:33:38,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634678599] [2024-02-07 14:33:38,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:38,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-02-07 14:33:38,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:38,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-02-07 14:33:38,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-02-07 14:33:38,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:38,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 112 transitions, 1123 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 14:33:38,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:38,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:38,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:39,312 INFO L124 PetriNetUnfolderBase]: 288/573 cut-off events. [2024-02-07 14:33:39,312 INFO L125 PetriNetUnfolderBase]: For 2482/2482 co-relation queries the response was YES. [2024-02-07 14:33:39,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2932 conditions, 573 events. 288/573 cut-off events. For 2482/2482 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2786 event pairs, 19 based on Foata normal form. 3/570 useless extension candidates. Maximal degree in co-relation 2828. Up to 228 conditions per place. [2024-02-07 14:33:39,317 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 85 selfloop transitions, 80 changer transitions 17/183 dead transitions. [2024-02-07 14:33:39,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 183 transitions, 1760 flow [2024-02-07 14:33:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-02-07 14:33:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-02-07 14:33:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 244 transitions. [2024-02-07 14:33:39,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468864468864469 [2024-02-07 14:33:39,322 INFO L175 Difference]: Start difference. First operand has 110 places, 112 transitions, 1123 flow. Second operand 26 states and 244 transitions. [2024-02-07 14:33:39,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 183 transitions, 1760 flow [2024-02-07 14:33:39,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 183 transitions, 1403 flow, removed 158 selfloop flow, removed 14 redundant places. [2024-02-07 14:33:39,341 INFO L231 Difference]: Finished difference. Result has 121 places, 115 transitions, 1026 flow [2024-02-07 14:33:39,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1026, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2024-02-07 14:33:39,341 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 98 predicate places. [2024-02-07 14:33:39,342 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 1026 flow [2024-02-07 14:33:39,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 14:33:39,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:39,342 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 14:33:39,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-02-07 14:33:39,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:39,553 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:39,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1785786684, now seen corresponding path program 4 times [2024-02-07 14:33:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:39,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111734758] [2024-02-07 14:33:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:39,841 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 14:33:39,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111734758] [2024-02-07 14:33:39,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111734758] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104300672] [2024-02-07 14:33:39,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:33:39,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:39,857 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 14:33:39,870 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 14:33:39,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:33:39,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:39,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2024-02-07 14:33:39,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:40,059 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 14:33:40,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:44,827 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 14:33:44,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104300672] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:44,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:44,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-02-07 14:33:44,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504975291] [2024-02-07 14:33:44,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:44,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-02-07 14:33:44,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:44,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-02-07 14:33:44,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-02-07 14:33:44,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:44,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 1026 flow. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:33:44,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:44,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:44,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:45,670 INFO L124 PetriNetUnfolderBase]: 366/709 cut-off events. [2024-02-07 14:33:45,670 INFO L125 PetriNetUnfolderBase]: For 2306/2306 co-relation queries the response was YES. [2024-02-07 14:33:45,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3462 conditions, 709 events. 366/709 cut-off events. For 2306/2306 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3529 event pairs, 50 based on Foata normal form. 3/694 useless extension candidates. Maximal degree in co-relation 3382. Up to 537 conditions per place. [2024-02-07 14:33:45,678 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 135 selfloop transitions, 46 changer transitions 18/200 dead transitions. [2024-02-07 14:33:45,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 200 transitions, 1976 flow [2024-02-07 14:33:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-02-07 14:33:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-02-07 14:33:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 179 transitions. [2024-02-07 14:33:45,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44862155388471175 [2024-02-07 14:33:45,681 INFO L175 Difference]: Start difference. First operand has 121 places, 115 transitions, 1026 flow. Second operand 19 states and 179 transitions. [2024-02-07 14:33:45,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 200 transitions, 1976 flow [2024-02-07 14:33:45,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1741 flow, removed 36 selfloop flow, removed 21 redundant places. [2024-02-07 14:33:45,696 INFO L231 Difference]: Finished difference. Result has 122 places, 148 transitions, 1340 flow [2024-02-07 14:33:45,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1340, PETRI_PLACES=122, PETRI_TRANSITIONS=148} [2024-02-07 14:33:45,697 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 99 predicate places. [2024-02-07 14:33:45,697 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 148 transitions, 1340 flow [2024-02-07 14:33:45,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:33:45,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:45,698 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:45,713 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 14:33:45,909 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,SelfDestructingSolverStorable11 [2024-02-07 14:33:45,910 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:45,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1296389511, now seen corresponding path program 4 times [2024-02-07 14:33:45,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:45,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861449587] [2024-02-07 14:33:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:45,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:46,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:46,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861449587] [2024-02-07 14:33:46,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861449587] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:46,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727734461] [2024-02-07 14:33:46,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:33:46,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:46,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:46,073 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 14:33:46,092 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 14:33:46,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:33:46,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:46,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-07 14:33:46,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:46,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:50,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727734461] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:50,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:50,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 14 [2024-02-07 14:33:50,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689017433] [2024-02-07 14:33:50,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:50,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:33:50,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:33:50,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=140, Unknown=1, NotChecked=0, Total=210 [2024-02-07 14:33:54,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2024-02-07 14:33:54,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-02-07 14:33:54,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 148 transitions, 1340 flow. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:33:54,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:54,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-02-07 14:33:54,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:54,803 INFO L124 PetriNetUnfolderBase]: 353/691 cut-off events. [2024-02-07 14:33:54,804 INFO L125 PetriNetUnfolderBase]: For 2338/2338 co-relation queries the response was YES. [2024-02-07 14:33:54,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3416 conditions, 691 events. 353/691 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3489 event pairs, 30 based on Foata normal form. 4/675 useless extension candidates. Maximal degree in co-relation 3361. Up to 466 conditions per place. [2024-02-07 14:33:54,808 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 108 selfloop transitions, 50 changer transitions 31/190 dead transitions. [2024-02-07 14:33:54,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 190 transitions, 1933 flow [2024-02-07 14:33:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:33:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:33:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 112 transitions. [2024-02-07 14:33:54,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-02-07 14:33:54,810 INFO L175 Difference]: Start difference. First operand has 122 places, 148 transitions, 1340 flow. Second operand 13 states and 112 transitions. [2024-02-07 14:33:54,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 190 transitions, 1933 flow [2024-02-07 14:33:54,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 190 transitions, 1819 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-02-07 14:33:54,821 INFO L231 Difference]: Finished difference. Result has 131 places, 144 transitions, 1310 flow [2024-02-07 14:33:54,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1310, PETRI_PLACES=131, PETRI_TRANSITIONS=144} [2024-02-07 14:33:54,822 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 108 predicate places. [2024-02-07 14:33:54,822 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 144 transitions, 1310 flow [2024-02-07 14:33:54,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:33:54,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:54,822 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 14:33:54,834 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 14:33:55,034 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,SelfDestructingSolverStorable12 [2024-02-07 14:33:55,034 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-02-07 14:33:55,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:55,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1533087872, now seen corresponding path program 5 times [2024-02-07 14:33:55,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:55,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654959843] [2024-02-07 14:33:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:55,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:55,326 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 14:33:55,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:55,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654959843] [2024-02-07 14:33:55,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654959843] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:55,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168112444] [2024-02-07 14:33:55,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:33:55,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:55,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:55,328 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 14:33:55,329 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 14:33:55,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:33:55,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:55,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2024-02-07 14:33:55,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:55,490 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 14:33:55,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 14:33:55,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168112444] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:55,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 14:33:55,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2024-02-07 14:33:55,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338131666] [2024-02-07 14:33:55,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:55,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:33:55,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:55,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:33:55,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:33:55,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-02-07 14:33:55,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 144 transitions, 1310 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 14:33:55,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:55,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-02-07 14:33:55,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:55,574 INFO L124 PetriNetUnfolderBase]: 116/281 cut-off events. [2024-02-07 14:33:55,574 INFO L125 PetriNetUnfolderBase]: For 1925/1925 co-relation queries the response was YES. [2024-02-07 14:33:55,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1503 conditions, 281 events. 116/281 cut-off events. For 1925/1925 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1274 event pairs, 79 based on Foata normal form. 62/343 useless extension candidates. Maximal degree in co-relation 1467. Up to 262 conditions per place. [2024-02-07 14:33:55,576 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2024-02-07 14:33:55,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 64 transitions, 759 flow [2024-02-07 14:33:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:33:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:33:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 53 transitions. [2024-02-07 14:33:55,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-02-07 14:33:55,577 INFO L175 Difference]: Start difference. First operand has 131 places, 144 transitions, 1310 flow. Second operand 6 states and 53 transitions. [2024-02-07 14:33:55,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 64 transitions, 759 flow [2024-02-07 14:33:55,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 64 transitions, 620 flow, removed 17 selfloop flow, removed 22 redundant places. [2024-02-07 14:33:55,581 INFO L231 Difference]: Finished difference. Result has 81 places, 0 transitions, 0 flow [2024-02-07 14:33:55,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=81, PETRI_TRANSITIONS=0} [2024-02-07 14:33:55,582 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 58 predicate places. [2024-02-07 14:33:55,582 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 0 transitions, 0 flow [2024-02-07 14:33:55,583 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 14:33:55,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-02-07 14:33:55,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-07 14:33:55,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-02-07 14:33:55,585 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-02-07 14:33:55,613 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 14:33:55,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-02-07 14:33:55,797 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 3, 1, 1] [2024-02-07 14:33:55,799 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 14:33:55,799 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 14:33:55,802 INFO L503 ceAbstractionStarter]: Automizer considered 1 witness invariants [2024-02-07 14:33:55,802 INFO L504 ceAbstractionStarter]: WitnessConsidered=1 [2024-02-07 14:33:55,803 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 02:33:55 BasicIcfg [2024-02-07 14:33:55,803 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 14:33:55,804 INFO L158 Benchmark]: Toolchain (without parser) took 34218.47ms. Allocated memory was 172.0MB in the beginning and 346.0MB in the end (delta: 174.1MB). Free memory was 100.6MB in the beginning and 294.4MB in the end (delta: -193.8MB). Peak memory consumption was 166.5MB. Max. memory is 16.1GB. [2024-02-07 14:33:55,804 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 92.3MB. Free memory was 52.3MB in the beginning and 52.3MB in the end (delta: 50.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:33:55,804 INFO L158 Benchmark]: Witness Parser took 4.33ms. Allocated memory is still 172.0MB. Free memory was 103.1MB in the beginning and 103.0MB in the end (delta: 98.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:33:55,805 INFO L158 Benchmark]: CACSL2BoogieTranslator took 274.03ms. Allocated memory is still 172.0MB. Free memory was 100.4MB in the beginning and 141.9MB in the end (delta: -41.5MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. [2024-02-07 14:33:55,805 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.49ms. Allocated memory is still 172.0MB. Free memory was 141.9MB in the beginning and 140.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:33:55,805 INFO L158 Benchmark]: Boogie Preprocessor took 57.04ms. Allocated memory is still 172.0MB. Free memory was 140.2MB in the beginning and 138.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 14:33:55,805 INFO L158 Benchmark]: RCFGBuilder took 468.83ms. Allocated memory is still 172.0MB. Free memory was 138.1MB in the beginning and 115.0MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-02-07 14:33:55,806 INFO L158 Benchmark]: TraceAbstraction took 33367.56ms. Allocated memory was 172.0MB in the beginning and 346.0MB in the end (delta: 174.1MB). Free memory was 114.2MB in the beginning and 294.4MB in the end (delta: -180.2MB). Peak memory consumption was 178.0MB. Max. memory is 16.1GB. [2024-02-07 14:33:55,808 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 92.3MB. Free memory was 52.3MB in the beginning and 52.3MB in the end (delta: 50.5kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 4.33ms. Allocated memory is still 172.0MB. Free memory was 103.1MB in the beginning and 103.0MB in the end (delta: 98.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 274.03ms. Allocated memory is still 172.0MB. Free memory was 100.4MB in the beginning and 141.9MB in the end (delta: -41.5MB). Peak memory consumption was 15.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.49ms. Allocated memory is still 172.0MB. Free memory was 141.9MB in the beginning and 140.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 57.04ms. Allocated memory is still 172.0MB. Free memory was 140.2MB in the beginning and 138.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 468.83ms. Allocated memory is still 172.0MB. Free memory was 138.1MB in the beginning and 115.0MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 33367.56ms. Allocated memory was 172.0MB in the beginning and 346.0MB in the end (delta: 174.1MB). Free memory was 114.2MB in the beginning and 294.4MB in the end (delta: -180.2MB). Peak memory consumption was 178.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 61]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 70]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 33.3s, OverallIterations: 14, TraceHistogramMax: 2, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 13.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 721 SdHoareTripleChecker+Valid, 11.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 697 mSDsluCounter, 64 SdHoareTripleChecker+Invalid, 10.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 61 mSDsCounter, 165 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3973 IncrementalHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 165 mSolverCounterUnsat, 3 mSDtfsCounter, 3973 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 490 GetRequests, 265 SyntacticMatches, 16 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1340occurred in iteration=12, InterpolantAutomatonStates: 178, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 15.3s InterpolantComputationTime, 413 NumberOfCodeBlocks, 413 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 557 ConstructedInterpolants, 1 QuantifiedInterpolants, 7661 SizeOfPredicates, 57 NumberOfNonLiveVariables, 1554 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 37 InterpolantComputations, 4 PerfectInterpolantSequences, 3/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-07 14:33:55,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE