./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-dist.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-dist.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-dist.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-dist.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 14:33:26,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:33:26,767 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:33:26,772 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:33:26,773 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:33:26,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:33:26,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:33:26,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:33:26,796 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:33:26,797 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:33:26,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:33:26,797 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:33:26,798 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:33:26,799 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:33:26,800 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:33:26,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:33:26,801 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:33:26,804 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:33:26,805 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:33:26,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:33:26,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:33:26,806 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:33:26,806 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:33:26,806 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:33:26,806 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:33:26,806 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:33:26,807 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:33:26,807 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:33:26,807 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:33:26,807 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:33:26,807 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:33:26,808 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:33:26,808 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:33:26,808 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:33:26,809 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:33:26,809 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:33:26,809 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:33:26,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:33:26,810 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:33:26,810 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:33:26,810 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:33:26,811 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:33:26,811 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:33:26,811 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:33:26,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:33:27,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:33:27,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:33:27,016 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:33:27,017 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:33:27,017 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-02-07 14:33:28,101 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:33:28,250 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:33:28,251 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2024-02-07 14:33:28,256 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0fba2bd/620f5cad6b97457e83d8589862a192fb/FLAGa8f61353b [2024-02-07 14:33:28,265 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a0fba2bd/620f5cad6b97457e83d8589862a192fb [2024-02-07 14:33:28,267 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:33:28,268 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:33:28,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-dist.wvr.yml/witness.yml [2024-02-07 14:33:28,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:33:28,318 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:33:28,319 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:33:28,319 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:33:28,322 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:33:28,323 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:33:28" (1/2) ... [2024-02-07 14:33:28,323 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b39b231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:33:28, skipping insertion in model container [2024-02-07 14:33:28,324 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:33:28" (1/2) ... [2024-02-07 14:33:28,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ce42a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:33:28, skipping insertion in model container [2024-02-07 14:33:28,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:33:28" (2/2) ... [2024-02-07 14:33:28,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b39b231 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:33:28, skipping insertion in model container [2024-02-07 14:33:28,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:33:28" (2/2) ... [2024-02-07 14:33:28,326 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:33:28,342 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:33:28,343 INFO L76 edCorrectnessWitness]: Location invariant before [L68-L68] ((((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 14:33:28,359 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:33:28,502 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-dist.wvr.c[2155,2168] [2024-02-07 14:33:28,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:33:28,511 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 14:33:28,544 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-dist.wvr.c[2155,2168] [2024-02-07 14:33:28,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:33:28,556 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:33:28,557 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:33:28 WrapperNode [2024-02-07 14:33:28,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:33:28,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:33:28,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:33:28,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:33:28,563 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,578 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,602 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2024-02-07 14:33:28,602 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:33:28,603 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:33:28,603 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:33:28,603 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:33:28,610 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,611 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,619 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,641 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-02-07 14:33:28,642 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,643 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,649 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,655 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,655 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,658 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,661 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:33:28,663 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:33:28,663 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:33:28,663 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:33:28,664 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 02:33:28" (1/1) ... [2024-02-07 14:33:28,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:33:28,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:28,694 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 14:33:28,697 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 14:33:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:33:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:33:28,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:33:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:33:28,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:33:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 14:33:28,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 14:33:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:33:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:33:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:33:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 14:33:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:33:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:33:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:33:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:33:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 14:33:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:33:28,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:33:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:33:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:33:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:33:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 14:33:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:33:28,759 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 14:33:28,874 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:33:28,875 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:33:29,011 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:33:29,011 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:33:29,136 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:33:29,137 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-07 14:33:29,137 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:33:29 BoogieIcfgContainer [2024-02-07 14:33:29,137 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:33:29,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:33:29,146 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:33:29,148 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:33:29,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:33:28" (1/4) ... [2024-02-07 14:33:29,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160bb53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:33:29, skipping insertion in model container [2024-02-07 14:33:29,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:33:28" (2/4) ... [2024-02-07 14:33:29,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160bb53e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:33:29, skipping insertion in model container [2024-02-07 14:33:29,149 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 02:33:28" (3/4) ... [2024-02-07 14:33:29,150 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160bb53e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:33:29, skipping insertion in model container [2024-02-07 14:33:29,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:33:29" (4/4) ... [2024-02-07 14:33:29,151 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2024-02-07 14:33:29,162 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:33:29,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 14:33:29,163 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:33:29,204 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-07 14:33:29,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 79 flow [2024-02-07 14:33:29,252 INFO L124 PetriNetUnfolderBase]: 3/26 cut-off events. [2024-02-07 14:33:29,252 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-07 14:33:29,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 26 events. 3/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-02-07 14:33:29,257 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 79 flow [2024-02-07 14:33:29,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 25 transitions, 68 flow [2024-02-07 14:33:29,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:33:29,281 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;@470477a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:33:29,281 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-07 14:33:29,291 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:33:29,296 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 14:33:29,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:33:29,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:29,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 14:33:29,298 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:29,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:29,304 INFO L85 PathProgramCache]: Analyzing trace with hash 9002, now seen corresponding path program 1 times [2024-02-07 14:33:29,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:29,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715930264] [2024-02-07 14:33:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:29,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:29,607 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 14:33:29,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:29,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715930264] [2024-02-07 14:33:29,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715930264] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:29,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:29,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 14:33:29,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705907177] [2024-02-07 14:33:29,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:29,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:33:29,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:33:29,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:33:29,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:33:29,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 14:33:29,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:29,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:33:29,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:29,809 INFO L124 PetriNetUnfolderBase]: 220/327 cut-off events. [2024-02-07 14:33:29,809 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-02-07 14:33:29,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 327 events. 220/327 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 772 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 326 conditions per place. [2024-02-07 14:33:29,813 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-02-07 14:33:29,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 112 flow [2024-02-07 14:33:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:33:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:33:29,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2024-02-07 14:33:29,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-02-07 14:33:29,822 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 3 states and 36 transitions. [2024-02-07 14:33:29,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 112 flow [2024-02-07 14:33:29,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 14:33:29,826 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 58 flow [2024-02-07 14:33:29,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-02-07 14:33:29,829 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2024-02-07 14:33:29,830 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 58 flow [2024-02-07 14:33:29,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 14:33:29,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:29,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:29,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:33:29,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:29,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash 685527005, now seen corresponding path program 1 times [2024-02-07 14:33:29,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:29,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827973070] [2024-02-07 14:33:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:29,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:30,061 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 14:33:30,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:30,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827973070] [2024-02-07 14:33:30,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827973070] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:30,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:30,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:33:30,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340792916] [2024-02-07 14:33:30,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:30,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:33:30,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:30,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:33:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:33:30,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:30,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:33:30,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:30,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:30,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:30,174 INFO L124 PetriNetUnfolderBase]: 428/632 cut-off events. [2024-02-07 14:33:30,175 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-02-07 14:33:30,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 632 events. 428/632 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2001 event pairs, 138 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 1282. Up to 389 conditions per place. [2024-02-07 14:33:30,182 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 37 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2024-02-07 14:33:30,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 43 transitions, 185 flow [2024-02-07 14:33:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:33:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:33:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-02-07 14:33:30,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-02-07 14:33:30,187 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 58 flow. Second operand 3 states and 58 transitions. [2024-02-07 14:33:30,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 43 transitions, 185 flow [2024-02-07 14:33:30,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:33:30,195 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 80 flow [2024-02-07 14:33:30,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2024-02-07 14:33:30,197 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -4 predicate places. [2024-02-07 14:33:30,202 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 80 flow [2024-02-07 14:33:30,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:33:30,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:30,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:30,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:33:30,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:30,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:30,206 INFO L85 PathProgramCache]: Analyzing trace with hash 956414599, now seen corresponding path program 1 times [2024-02-07 14:33:30,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:30,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652594031] [2024-02-07 14:33:30,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:30,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:30,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652594031] [2024-02-07 14:33:30,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652594031] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:30,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:30,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273971028] [2024-02-07 14:33:30,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:30,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:30,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:30,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:30,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 80 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:30,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:30,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:30,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:30,725 INFO L124 PetriNetUnfolderBase]: 586/838 cut-off events. [2024-02-07 14:33:30,725 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-02-07 14:33:30,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2068 conditions, 838 events. 586/838 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2735 event pairs, 231 based on Foata normal form. 2/840 useless extension candidates. Maximal degree in co-relation 599. Up to 621 conditions per place. [2024-02-07 14:33:30,730 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 50 selfloop transitions, 18 changer transitions 3/72 dead transitions. [2024-02-07 14:33:30,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 72 transitions, 359 flow [2024-02-07 14:33:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-02-07 14:33:30,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47783251231527096 [2024-02-07 14:33:30,733 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 80 flow. Second operand 7 states and 97 transitions. [2024-02-07 14:33:30,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 72 transitions, 359 flow [2024-02-07 14:33:30,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 72 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:33:30,736 INFO L231 Difference]: Finished difference. Result has 37 places, 43 transitions, 204 flow [2024-02-07 14:33:30,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=204, PETRI_PLACES=37, PETRI_TRANSITIONS=43} [2024-02-07 14:33:30,737 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2024-02-07 14:33:30,738 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 43 transitions, 204 flow [2024-02-07 14:33:30,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:30,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:30,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:33:30,739 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:30,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1336056039, now seen corresponding path program 2 times [2024-02-07 14:33:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:30,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732314009] [2024-02-07 14:33:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:30,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:30,921 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 14:33:30,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732314009] [2024-02-07 14:33:30,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732314009] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:30,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493624172] [2024-02-07 14:33:30,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:33:30,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:30,924 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 14:33:30,956 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 14:33:31,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:33:31,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:31,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:33:31,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:31,158 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 14:33:31,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493624172] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:31,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:33:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 12 [2024-02-07 14:33:31,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29800611] [2024-02-07 14:33:31,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:31,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:33:31,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:31,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:33:31,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:33:31,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:31,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 43 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:31,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:31,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:31,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:31,981 INFO L124 PetriNetUnfolderBase]: 953/1384 cut-off events. [2024-02-07 14:33:31,981 INFO L125 PetriNetUnfolderBase]: For 1340/1340 co-relation queries the response was YES. [2024-02-07 14:33:31,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4404 conditions, 1384 events. 953/1384 cut-off events. For 1340/1340 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5154 event pairs, 257 based on Foata normal form. 8/1392 useless extension candidates. Maximal degree in co-relation 2478. Up to 505 conditions per place. [2024-02-07 14:33:31,988 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 103 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-02-07 14:33:31,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 125 transitions, 752 flow [2024-02-07 14:33:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:33:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:33:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-02-07 14:33:31,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2024-02-07 14:33:31,990 INFO L175 Difference]: Start difference. First operand has 37 places, 43 transitions, 204 flow. Second operand 8 states and 144 transitions. [2024-02-07 14:33:31,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 125 transitions, 752 flow [2024-02-07 14:33:31,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 125 transitions, 730 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-02-07 14:33:31,994 INFO L231 Difference]: Finished difference. Result has 48 places, 57 transitions, 337 flow [2024-02-07 14:33:31,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=337, PETRI_PLACES=48, PETRI_TRANSITIONS=57} [2024-02-07 14:33:31,995 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2024-02-07 14:33:31,995 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 57 transitions, 337 flow [2024-02-07 14:33:31,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:31,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:31,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:32,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 14:33:32,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:32,207 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:32,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash 962183387, now seen corresponding path program 3 times [2024-02-07 14:33:32,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:32,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28887476] [2024-02-07 14:33:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:32,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:32,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:32,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28887476] [2024-02-07 14:33:32,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28887476] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:32,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:32,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:32,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634624943] [2024-02-07 14:33:32,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:32,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:32,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:32,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:32,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 57 transitions, 337 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:32,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:32,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:32,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:32,638 INFO L124 PetriNetUnfolderBase]: 1156/1653 cut-off events. [2024-02-07 14:33:32,639 INFO L125 PetriNetUnfolderBase]: For 4329/4329 co-relation queries the response was YES. [2024-02-07 14:33:32,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6595 conditions, 1653 events. 1156/1653 cut-off events. For 4329/4329 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6212 event pairs, 423 based on Foata normal form. 2/1655 useless extension candidates. Maximal degree in co-relation 4249. Up to 1231 conditions per place. [2024-02-07 14:33:32,647 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 71 selfloop transitions, 28 changer transitions 3/103 dead transitions. [2024-02-07 14:33:32,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 103 transitions, 794 flow [2024-02-07 14:33:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 97 transitions. [2024-02-07 14:33:32,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47783251231527096 [2024-02-07 14:33:32,648 INFO L175 Difference]: Start difference. First operand has 48 places, 57 transitions, 337 flow. Second operand 7 states and 97 transitions. [2024-02-07 14:33:32,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 103 transitions, 794 flow [2024-02-07 14:33:32,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 103 transitions, 774 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-02-07 14:33:32,660 INFO L231 Difference]: Finished difference. Result has 57 places, 73 transitions, 535 flow [2024-02-07 14:33:32,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=535, PETRI_PLACES=57, PETRI_TRANSITIONS=73} [2024-02-07 14:33:32,660 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2024-02-07 14:33:32,660 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 73 transitions, 535 flow [2024-02-07 14:33:32,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:32,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:32,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:32,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:33:32,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:32,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:32,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1157146829, now seen corresponding path program 4 times [2024-02-07 14:33:32,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:32,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377897257] [2024-02-07 14:33:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:32,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:32,772 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 14:33:32,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:32,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377897257] [2024-02-07 14:33:32,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377897257] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:32,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052572956] [2024-02-07 14:33:32,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:33:32,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:32,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:32,774 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 14:33:32,799 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 14:33:32,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:33:32,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:32,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:33:32,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:32,951 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 14:33:32,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:33,220 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 14:33:33,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052572956] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:33,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:33,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 14:33:33,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234997370] [2024-02-07 14:33:33,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:33,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:33:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:33:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:33:33,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:33:33,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 73 transitions, 535 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:33:33,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:33,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:33:33,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:33,754 INFO L124 PetriNetUnfolderBase]: 1327/1981 cut-off events. [2024-02-07 14:33:33,754 INFO L125 PetriNetUnfolderBase]: For 7373/7373 co-relation queries the response was YES. [2024-02-07 14:33:33,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8791 conditions, 1981 events. 1327/1981 cut-off events. For 7373/7373 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8431 event pairs, 234 based on Foata normal form. 12/1993 useless extension candidates. Maximal degree in co-relation 5521. Up to 652 conditions per place. [2024-02-07 14:33:33,767 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 121 selfloop transitions, 52 changer transitions 0/174 dead transitions. [2024-02-07 14:33:33,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 174 transitions, 1427 flow [2024-02-07 14:33:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:33:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:33:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 157 transitions. [2024-02-07 14:33:33,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49216300940438873 [2024-02-07 14:33:33,770 INFO L175 Difference]: Start difference. First operand has 57 places, 73 transitions, 535 flow. Second operand 11 states and 157 transitions. [2024-02-07 14:33:33,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 174 transitions, 1427 flow [2024-02-07 14:33:33,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 174 transitions, 1365 flow, removed 31 selfloop flow, removed 0 redundant places. [2024-02-07 14:33:33,795 INFO L231 Difference]: Finished difference. Result has 71 places, 97 transitions, 870 flow [2024-02-07 14:33:33,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=870, PETRI_PLACES=71, PETRI_TRANSITIONS=97} [2024-02-07 14:33:33,797 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2024-02-07 14:33:33,798 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 97 transitions, 870 flow [2024-02-07 14:33:33,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:33:33,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:33,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:33,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-07 14:33:34,009 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,SelfDestructingSolverStorable5 [2024-02-07 14:33:34,010 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:34,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1533522907, now seen corresponding path program 5 times [2024-02-07 14:33:34,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:34,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358277691] [2024-02-07 14:33:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:34,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:34,175 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 14:33:34,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:34,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358277691] [2024-02-07 14:33:34,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358277691] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:34,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802743992] [2024-02-07 14:33:34,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:33:34,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:34,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:34,193 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 14:33:34,221 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 14:33:34,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:33:34,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:34,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 14:33:34,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:34,356 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 14:33:34,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:34,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802743992] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:34,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:33:34,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 10 [2024-02-07 14:33:34,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934235658] [2024-02-07 14:33:34,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:34,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:33:34,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:34,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:33:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-02-07 14:33:34,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:34,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 97 transitions, 870 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:34,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:34,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:34,829 INFO L124 PetriNetUnfolderBase]: 1567/2353 cut-off events. [2024-02-07 14:33:34,829 INFO L125 PetriNetUnfolderBase]: For 12011/12011 co-relation queries the response was YES. [2024-02-07 14:33:34,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11221 conditions, 2353 events. 1567/2353 cut-off events. For 12011/12011 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10412 event pairs, 285 based on Foata normal form. 6/2359 useless extension candidates. Maximal degree in co-relation 9197. Up to 790 conditions per place. [2024-02-07 14:33:34,846 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 139 selfloop transitions, 49 changer transitions 0/189 dead transitions. [2024-02-07 14:33:34,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 189 transitions, 1834 flow [2024-02-07 14:33:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:33:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:33:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-02-07 14:33:34,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6293103448275862 [2024-02-07 14:33:34,847 INFO L175 Difference]: Start difference. First operand has 71 places, 97 transitions, 870 flow. Second operand 8 states and 146 transitions. [2024-02-07 14:33:34,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 189 transitions, 1834 flow [2024-02-07 14:33:34,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 189 transitions, 1796 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-02-07 14:33:34,876 INFO L231 Difference]: Finished difference. Result has 82 places, 117 transitions, 1255 flow [2024-02-07 14:33:34,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1255, PETRI_PLACES=82, PETRI_TRANSITIONS=117} [2024-02-07 14:33:34,877 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 50 predicate places. [2024-02-07 14:33:34,877 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 117 transitions, 1255 flow [2024-02-07 14:33:34,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:34,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:34,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:34,905 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 14:33:35,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:35,089 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:35,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1094455029, now seen corresponding path program 6 times [2024-02-07 14:33:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:35,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482636936] [2024-02-07 14:33:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:35,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:35,200 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 14:33:35,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:35,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482636936] [2024-02-07 14:33:35,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482636936] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:35,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187664918] [2024-02-07 14:33:35,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:33:35,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:35,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:35,202 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 14:33:35,229 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 14:33:35,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 14:33:35,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:35,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:33:35,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:35,355 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 14:33:35,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:35,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187664918] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:35,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:33:35,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 13 [2024-02-07 14:33:35,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849044389] [2024-02-07 14:33:35,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:35,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:33:35,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:35,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:33:35,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:33:35,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:35,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 117 transitions, 1255 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:35,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:35,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:35,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:35,913 INFO L124 PetriNetUnfolderBase]: 2079/3192 cut-off events. [2024-02-07 14:33:35,913 INFO L125 PetriNetUnfolderBase]: For 24069/24069 co-relation queries the response was YES. [2024-02-07 14:33:35,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16960 conditions, 3192 events. 2079/3192 cut-off events. For 24069/24069 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15546 event pairs, 414 based on Foata normal form. 6/3198 useless extension candidates. Maximal degree in co-relation 16038. Up to 1491 conditions per place. [2024-02-07 14:33:35,940 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 161 selfloop transitions, 106 changer transitions 3/271 dead transitions. [2024-02-07 14:33:35,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 271 transitions, 3319 flow [2024-02-07 14:33:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-02-07 14:33:35,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960591133004927 [2024-02-07 14:33:35,941 INFO L175 Difference]: Start difference. First operand has 82 places, 117 transitions, 1255 flow. Second operand 7 states and 121 transitions. [2024-02-07 14:33:35,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 271 transitions, 3319 flow [2024-02-07 14:33:35,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 271 transitions, 3251 flow, removed 34 selfloop flow, removed 0 redundant places. [2024-02-07 14:33:36,004 INFO L231 Difference]: Finished difference. Result has 93 places, 201 transitions, 2676 flow [2024-02-07 14:33:36,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2676, PETRI_PLACES=93, PETRI_TRANSITIONS=201} [2024-02-07 14:33:36,006 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 61 predicate places. [2024-02-07 14:33:36,007 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 201 transitions, 2676 flow [2024-02-07 14:33:36,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:36,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:36,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:36,035 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 14:33:36,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:36,218 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:36,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1345766047, now seen corresponding path program 7 times [2024-02-07 14:33:36,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:36,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925895454] [2024-02-07 14:33:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:36,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:36,392 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 14:33:36,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:36,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925895454] [2024-02-07 14:33:36,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925895454] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243410252] [2024-02-07 14:33:36,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:33:36,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:36,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:36,394 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 14:33:36,421 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 14:33:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:36,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 14:33:36,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:36,544 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 14:33:36,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243410252] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:36,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:33:36,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 12 [2024-02-07 14:33:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164872055] [2024-02-07 14:33:36,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:36,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:33:36,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:36,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:33:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:33:36,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:36,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 201 transitions, 2676 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:36,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:36,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:36,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:37,069 INFO L124 PetriNetUnfolderBase]: 2139/3284 cut-off events. [2024-02-07 14:33:37,069 INFO L125 PetriNetUnfolderBase]: For 33933/33933 co-relation queries the response was YES. [2024-02-07 14:33:37,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20017 conditions, 3284 events. 2139/3284 cut-off events. For 33933/33933 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16059 event pairs, 493 based on Foata normal form. 22/3306 useless extension candidates. Maximal degree in co-relation 18459. Up to 1855 conditions per place. [2024-02-07 14:33:37,092 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 201 selfloop transitions, 56 changer transitions 0/258 dead transitions. [2024-02-07 14:33:37,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 258 transitions, 3667 flow [2024-02-07 14:33:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:33:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:33:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-02-07 14:33:37,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-02-07 14:33:37,094 INFO L175 Difference]: Start difference. First operand has 93 places, 201 transitions, 2676 flow. Second operand 6 states and 102 transitions. [2024-02-07 14:33:37,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 258 transitions, 3667 flow [2024-02-07 14:33:37,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 258 transitions, 3569 flow, removed 49 selfloop flow, removed 0 redundant places. [2024-02-07 14:33:37,249 INFO L231 Difference]: Finished difference. Result has 101 places, 213 transitions, 2957 flow [2024-02-07 14:33:37,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2957, PETRI_PLACES=101, PETRI_TRANSITIONS=213} [2024-02-07 14:33:37,250 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 69 predicate places. [2024-02-07 14:33:37,251 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 213 transitions, 2957 flow [2024-02-07 14:33:37,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:37,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:37,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:37,264 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 14:33:37,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:37,465 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:37,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1531435160, now seen corresponding path program 1 times [2024-02-07 14:33:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:37,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493641026] [2024-02-07 14:33:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:37,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:37,588 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 14:33:37,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:37,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493641026] [2024-02-07 14:33:37,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493641026] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:37,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787230254] [2024-02-07 14:33:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:37,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:37,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:37,590 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 14:33:37,627 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 14:33:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:37,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 14:33:37,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:37,770 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 14:33:37,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:38,111 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 14:33:38,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787230254] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:38,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:38,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 14:33:38,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272307867] [2024-02-07 14:33:38,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:38,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:33:38,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:38,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:33:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:33:38,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:33:38,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 213 transitions, 2957 flow. Second operand has 13 states, 13 states have (on average 6.923076923076923) internal successors, (90), 13 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 14:33:38,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:38,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:33:38,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:38,897 INFO L124 PetriNetUnfolderBase]: 2326/3577 cut-off events. [2024-02-07 14:33:38,898 INFO L125 PetriNetUnfolderBase]: For 36449/36449 co-relation queries the response was YES. [2024-02-07 14:33:38,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21622 conditions, 3577 events. 2326/3577 cut-off events. For 36449/36449 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 17942 event pairs, 534 based on Foata normal form. 18/3595 useless extension candidates. Maximal degree in co-relation 20376. Up to 1738 conditions per place. [2024-02-07 14:33:38,921 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 186 selfloop transitions, 148 changer transitions 0/335 dead transitions. [2024-02-07 14:33:38,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 335 transitions, 4594 flow [2024-02-07 14:33:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:33:38,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:33:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 161 transitions. [2024-02-07 14:33:38,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047021943573667 [2024-02-07 14:33:38,923 INFO L175 Difference]: Start difference. First operand has 101 places, 213 transitions, 2957 flow. Second operand 11 states and 161 transitions. [2024-02-07 14:33:38,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 335 transitions, 4594 flow [2024-02-07 14:33:39,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 335 transitions, 4484 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-02-07 14:33:39,013 INFO L231 Difference]: Finished difference. Result has 116 places, 252 transitions, 3830 flow [2024-02-07 14:33:39,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3830, PETRI_PLACES=116, PETRI_TRANSITIONS=252} [2024-02-07 14:33:39,014 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 84 predicate places. [2024-02-07 14:33:39,014 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 252 transitions, 3830 flow [2024-02-07 14:33:39,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.923076923076923) internal successors, (90), 13 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 14:33:39,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:39,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:39,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-02-07 14:33:39,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:39,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:39,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:39,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1637991449, now seen corresponding path program 8 times [2024-02-07 14:33:39,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:39,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647991722] [2024-02-07 14:33:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:39,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:39,364 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 14:33:39,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:39,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647991722] [2024-02-07 14:33:39,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647991722] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:39,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997852685] [2024-02-07 14:33:39,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:33:39,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:39,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:39,366 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 14:33:39,380 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 14:33:39,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:33:39,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:39,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 14:33:39,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:39,510 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 14:33:39,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:39,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997852685] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:39,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:33:39,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 12 [2024-02-07 14:33:39,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956811422] [2024-02-07 14:33:39,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:39,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:33:39,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:33:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:33:39,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:39,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 252 transitions, 3830 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:39,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:39,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:39,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:40,112 INFO L124 PetriNetUnfolderBase]: 2302/3542 cut-off events. [2024-02-07 14:33:40,112 INFO L125 PetriNetUnfolderBase]: For 39936/39936 co-relation queries the response was YES. [2024-02-07 14:33:40,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22502 conditions, 3542 events. 2302/3542 cut-off events. For 39936/39936 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 17790 event pairs, 520 based on Foata normal form. 22/3564 useless extension candidates. Maximal degree in co-relation 21839. Up to 1826 conditions per place. [2024-02-07 14:33:40,140 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 228 selfloop transitions, 70 changer transitions 0/299 dead transitions. [2024-02-07 14:33:40,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 299 transitions, 4738 flow [2024-02-07 14:33:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:33:40,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:33:40,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-02-07 14:33:40,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2024-02-07 14:33:40,142 INFO L175 Difference]: Start difference. First operand has 116 places, 252 transitions, 3830 flow. Second operand 6 states and 102 transitions. [2024-02-07 14:33:40,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 299 transitions, 4738 flow [2024-02-07 14:33:40,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 299 transitions, 4698 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-02-07 14:33:40,236 INFO L231 Difference]: Finished difference. Result has 122 places, 256 transitions, 4052 flow [2024-02-07 14:33:40,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3790, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4052, PETRI_PLACES=122, PETRI_TRANSITIONS=256} [2024-02-07 14:33:40,237 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 90 predicate places. [2024-02-07 14:33:40,237 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 256 transitions, 4052 flow [2024-02-07 14:33:40,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:40,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:40,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:40,252 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 14:33:40,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:40,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:40,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:40,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1170175860, now seen corresponding path program 2 times [2024-02-07 14:33:40,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:40,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145574777] [2024-02-07 14:33:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:40,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:40,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:40,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:40,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145574777] [2024-02-07 14:33:40,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145574777] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:40,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:40,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:40,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153091957] [2024-02-07 14:33:40,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:40,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:40,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:40,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:40,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 256 transitions, 4052 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:40,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:40,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:40,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:41,159 INFO L124 PetriNetUnfolderBase]: 2320/3568 cut-off events. [2024-02-07 14:33:41,159 INFO L125 PetriNetUnfolderBase]: For 43342/43342 co-relation queries the response was YES. [2024-02-07 14:33:41,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23308 conditions, 3568 events. 2320/3568 cut-off events. For 43342/43342 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17907 event pairs, 658 based on Foata normal form. 4/3572 useless extension candidates. Maximal degree in co-relation 22904. Up to 2330 conditions per place. [2024-02-07 14:33:41,191 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 230 selfloop transitions, 75 changer transitions 5/311 dead transitions. [2024-02-07 14:33:41,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 311 transitions, 5066 flow [2024-02-07 14:33:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-02-07 14:33:41,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541871921182266 [2024-02-07 14:33:41,193 INFO L175 Difference]: Start difference. First operand has 122 places, 256 transitions, 4052 flow. Second operand 7 states and 110 transitions. [2024-02-07 14:33:41,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 311 transitions, 5066 flow [2024-02-07 14:33:41,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 311 transitions, 4936 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-02-07 14:33:41,288 INFO L231 Difference]: Finished difference. Result has 128 places, 260 transitions, 4154 flow [2024-02-07 14:33:41,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3922, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4154, PETRI_PLACES=128, PETRI_TRANSITIONS=260} [2024-02-07 14:33:41,288 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 96 predicate places. [2024-02-07 14:33:41,288 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 260 transitions, 4154 flow [2024-02-07 14:33:41,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:41,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:41,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:41,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 14:33:41,289 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:41,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:41,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1628872745, now seen corresponding path program 1 times [2024-02-07 14:33:41,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:41,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890931088] [2024-02-07 14:33:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:41,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:41,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:41,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890931088] [2024-02-07 14:33:41,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890931088] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:41,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:41,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:41,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323334417] [2024-02-07 14:33:41,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:41,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:41,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:41,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:41,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:41,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:41,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 260 transitions, 4154 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:41,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:41,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:41,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:41,978 INFO L124 PetriNetUnfolderBase]: 2331/3615 cut-off events. [2024-02-07 14:33:41,978 INFO L125 PetriNetUnfolderBase]: For 44659/44659 co-relation queries the response was YES. [2024-02-07 14:33:41,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23551 conditions, 3615 events. 2331/3615 cut-off events. For 44659/44659 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18518 event pairs, 662 based on Foata normal form. 18/3633 useless extension candidates. Maximal degree in co-relation 23129. Up to 2330 conditions per place. [2024-02-07 14:33:42,007 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 229 selfloop transitions, 71 changer transitions 19/320 dead transitions. [2024-02-07 14:33:42,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 320 transitions, 5184 flow [2024-02-07 14:33:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-02-07 14:33:42,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-02-07 14:33:42,008 INFO L175 Difference]: Start difference. First operand has 128 places, 260 transitions, 4154 flow. Second operand 7 states and 116 transitions. [2024-02-07 14:33:42,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 320 transitions, 5184 flow [2024-02-07 14:33:42,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 320 transitions, 5031 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-02-07 14:33:42,121 INFO L231 Difference]: Finished difference. Result has 132 places, 258 transitions, 4127 flow [2024-02-07 14:33:42,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4127, PETRI_PLACES=132, PETRI_TRANSITIONS=258} [2024-02-07 14:33:42,122 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 100 predicate places. [2024-02-07 14:33:42,122 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 258 transitions, 4127 flow [2024-02-07 14:33:42,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:42,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:42,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:42,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 14:33:42,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:42,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1427872605, now seen corresponding path program 9 times [2024-02-07 14:33:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:42,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535036455] [2024-02-07 14:33:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:42,227 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 14:33:42,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:42,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535036455] [2024-02-07 14:33:42,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535036455] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310964620] [2024-02-07 14:33:42,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:33:42,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:42,244 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 14:33:42,245 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 14:33:42,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:33:42,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:42,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:33:42,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:42,404 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 14:33:42,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:42,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310964620] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:42,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:33:42,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 11 [2024-02-07 14:33:42,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904051134] [2024-02-07 14:33:42,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:42,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:33:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:33:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:33:42,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:42,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 258 transitions, 4127 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:42,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:42,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:42,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:42,987 INFO L124 PetriNetUnfolderBase]: 2306/3566 cut-off events. [2024-02-07 14:33:42,988 INFO L125 PetriNetUnfolderBase]: For 44056/44056 co-relation queries the response was YES. [2024-02-07 14:33:43,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23405 conditions, 3566 events. 2306/3566 cut-off events. For 44056/44056 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18066 event pairs, 539 based on Foata normal form. 16/3582 useless extension candidates. Maximal degree in co-relation 22981. Up to 1910 conditions per place. [2024-02-07 14:33:43,016 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 245 selfloop transitions, 57 changer transitions 0/303 dead transitions. [2024-02-07 14:33:43,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 303 transitions, 5047 flow [2024-02-07 14:33:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:33:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:33:43,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-02-07 14:33:43,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-02-07 14:33:43,017 INFO L175 Difference]: Start difference. First operand has 132 places, 258 transitions, 4127 flow. Second operand 6 states and 100 transitions. [2024-02-07 14:33:43,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 303 transitions, 5047 flow [2024-02-07 14:33:43,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 303 transitions, 4893 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-02-07 14:33:43,122 INFO L231 Difference]: Finished difference. Result has 130 places, 261 transitions, 4148 flow [2024-02-07 14:33:43,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3977, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4148, PETRI_PLACES=130, PETRI_TRANSITIONS=261} [2024-02-07 14:33:43,123 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 98 predicate places. [2024-02-07 14:33:43,123 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 261 transitions, 4148 flow [2024-02-07 14:33:43,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:43,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:43,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:43,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 14:33:43,330 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,SelfDestructingSolverStorable13 [2024-02-07 14:33:43,331 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:43,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1164828208, now seen corresponding path program 3 times [2024-02-07 14:33:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:43,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815894519] [2024-02-07 14:33:43,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:43,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:43,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815894519] [2024-02-07 14:33:43,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815894519] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:43,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:43,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:43,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985019363] [2024-02-07 14:33:43,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:43,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:43,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:43,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:43,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:43,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 261 transitions, 4148 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:43,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:43,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:43,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:44,029 INFO L124 PetriNetUnfolderBase]: 2305/3569 cut-off events. [2024-02-07 14:33:44,030 INFO L125 PetriNetUnfolderBase]: For 45064/45064 co-relation queries the response was YES. [2024-02-07 14:33:44,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23372 conditions, 3569 events. 2305/3569 cut-off events. For 45064/45064 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18128 event pairs, 651 based on Foata normal form. 4/3573 useless extension candidates. Maximal degree in co-relation 23249. Up to 2365 conditions per place. [2024-02-07 14:33:44,054 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 228 selfloop transitions, 80 changer transitions 4/313 dead transitions. [2024-02-07 14:33:44,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 313 transitions, 5124 flow [2024-02-07 14:33:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-02-07 14:33:44,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320197044334976 [2024-02-07 14:33:44,056 INFO L175 Difference]: Start difference. First operand has 130 places, 261 transitions, 4148 flow. Second operand 7 states and 108 transitions. [2024-02-07 14:33:44,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 313 transitions, 5124 flow [2024-02-07 14:33:44,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 313 transitions, 5000 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-02-07 14:33:44,153 INFO L231 Difference]: Finished difference. Result has 135 places, 266 transitions, 4331 flow [2024-02-07 14:33:44,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4331, PETRI_PLACES=135, PETRI_TRANSITIONS=266} [2024-02-07 14:33:44,154 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2024-02-07 14:33:44,155 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 266 transitions, 4331 flow [2024-02-07 14:33:44,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:44,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:44,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:44,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 14:33:44,155 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:44,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1238623860, now seen corresponding path program 4 times [2024-02-07 14:33:44,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:44,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312758999] [2024-02-07 14:33:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:44,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:44,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:44,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:44,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312758999] [2024-02-07 14:33:44,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312758999] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:44,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:44,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:44,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461175432] [2024-02-07 14:33:44,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:44,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:44,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:44,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:44,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:44,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:44,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 266 transitions, 4331 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:44,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:44,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:44,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:44,849 INFO L124 PetriNetUnfolderBase]: 2298/3584 cut-off events. [2024-02-07 14:33:44,849 INFO L125 PetriNetUnfolderBase]: For 45529/45529 co-relation queries the response was YES. [2024-02-07 14:33:44,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23559 conditions, 3584 events. 2298/3584 cut-off events. For 45529/45529 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18456 event pairs, 637 based on Foata normal form. 16/3600 useless extension candidates. Maximal degree in co-relation 23505. Up to 2365 conditions per place. [2024-02-07 14:33:44,873 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 233 selfloop transitions, 77 changer transitions 6/317 dead transitions. [2024-02-07 14:33:44,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 317 transitions, 5244 flow [2024-02-07 14:33:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-02-07 14:33:44,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517241379310345 [2024-02-07 14:33:44,874 INFO L175 Difference]: Start difference. First operand has 135 places, 266 transitions, 4331 flow. Second operand 7 states and 112 transitions. [2024-02-07 14:33:44,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 317 transitions, 5244 flow [2024-02-07 14:33:44,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 317 transitions, 5099 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-02-07 14:33:44,990 INFO L231 Difference]: Finished difference. Result has 139 places, 263 transitions, 4299 flow [2024-02-07 14:33:44,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4148, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4299, PETRI_PLACES=139, PETRI_TRANSITIONS=263} [2024-02-07 14:33:44,990 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 107 predicate places. [2024-02-07 14:33:44,991 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 263 transitions, 4299 flow [2024-02-07 14:33:44,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:44,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:44,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:44,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-07 14:33:44,992 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:44,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash 458213785, now seen corresponding path program 10 times [2024-02-07 14:33:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:44,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294691467] [2024-02-07 14:33:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:44,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:45,109 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 14:33:45,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:45,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294691467] [2024-02-07 14:33:45,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294691467] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:45,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146887391] [2024-02-07 14:33:45,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:33:45,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:45,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:45,111 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 14:33:45,145 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 14:33:45,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:33:45,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:45,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:33:45,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:45,290 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 14:33:45,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:45,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146887391] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:45,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:33:45,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 11 [2024-02-07 14:33:45,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521704947] [2024-02-07 14:33:45,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:45,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:33:45,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:45,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:33:45,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:33:45,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:45,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 263 transitions, 4299 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:45,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:45,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:45,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:45,971 INFO L124 PetriNetUnfolderBase]: 2259/3484 cut-off events. [2024-02-07 14:33:45,971 INFO L125 PetriNetUnfolderBase]: For 44299/44299 co-relation queries the response was YES. [2024-02-07 14:33:45,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23198 conditions, 3484 events. 2259/3484 cut-off events. For 44299/44299 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17531 event pairs, 521 based on Foata normal form. 16/3500 useless extension candidates. Maximal degree in co-relation 23143. Up to 1773 conditions per place. [2024-02-07 14:33:45,998 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 231 selfloop transitions, 73 changer transitions 0/305 dead transitions. [2024-02-07 14:33:45,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 305 transitions, 5163 flow [2024-02-07 14:33:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:33:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:33:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-02-07 14:33:46,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2024-02-07 14:33:46,000 INFO L175 Difference]: Start difference. First operand has 139 places, 263 transitions, 4299 flow. Second operand 6 states and 100 transitions. [2024-02-07 14:33:46,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 305 transitions, 5163 flow [2024-02-07 14:33:46,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 305 transitions, 4997 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 14:33:46,131 INFO L231 Difference]: Finished difference. Result has 138 places, 263 transitions, 4288 flow [2024-02-07 14:33:46,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4135, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4288, PETRI_PLACES=138, PETRI_TRANSITIONS=263} [2024-02-07 14:33:46,132 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 106 predicate places. [2024-02-07 14:33:46,132 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 263 transitions, 4288 flow [2024-02-07 14:33:46,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:33:46,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:46,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:46,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 14:33:46,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 14:33:46,344 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:46,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1056014544, now seen corresponding path program 5 times [2024-02-07 14:33:46,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:46,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267848801] [2024-02-07 14:33:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:46,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:46,454 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 14:33:46,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:46,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267848801] [2024-02-07 14:33:46,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267848801] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:46,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521543658] [2024-02-07 14:33:46,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:33:46,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:46,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:46,456 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 14:33:46,479 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 14:33:46,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:33:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:46,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 14:33:46,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:46,592 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 14:33:46,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:46,715 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 14:33:46,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521543658] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:46,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:46,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 14:33:46,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848251182] [2024-02-07 14:33:46,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:46,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:33:46,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:46,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:33:46,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:33:46,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:33:46,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 263 transitions, 4288 flow. Second operand has 13 states, 13 states have (on average 6.923076923076923) internal successors, (90), 13 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 14:33:46,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:46,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:33:46,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:47,437 INFO L124 PetriNetUnfolderBase]: 2328/3601 cut-off events. [2024-02-07 14:33:47,437 INFO L125 PetriNetUnfolderBase]: For 46824/46824 co-relation queries the response was YES. [2024-02-07 14:33:47,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23941 conditions, 3601 events. 2328/3601 cut-off events. For 46824/46824 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 18368 event pairs, 626 based on Foata normal form. 20/3621 useless extension candidates. Maximal degree in co-relation 23886. Up to 2306 conditions per place. [2024-02-07 14:33:47,460 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 245 selfloop transitions, 93 changer transitions 0/339 dead transitions. [2024-02-07 14:33:47,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 339 transitions, 5473 flow [2024-02-07 14:33:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:33:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:33:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-02-07 14:33:47,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45141065830721006 [2024-02-07 14:33:47,461 INFO L175 Difference]: Start difference. First operand has 138 places, 263 transitions, 4288 flow. Second operand 11 states and 144 transitions. [2024-02-07 14:33:47,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 339 transitions, 5473 flow [2024-02-07 14:33:47,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 339 transitions, 5401 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-02-07 14:33:47,573 INFO L231 Difference]: Finished difference. Result has 150 places, 277 transitions, 4649 flow [2024-02-07 14:33:47,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4649, PETRI_PLACES=150, PETRI_TRANSITIONS=277} [2024-02-07 14:33:47,573 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 118 predicate places. [2024-02-07 14:33:47,574 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 277 transitions, 4649 flow [2024-02-07 14:33:47,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.923076923076923) internal successors, (90), 13 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 14:33:47,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:47,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:47,588 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 14:33:47,778 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,SelfDestructingSolverStorable17 [2024-02-07 14:33:47,778 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:47,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1339167227, now seen corresponding path program 11 times [2024-02-07 14:33:47,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:47,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457691309] [2024-02-07 14:33:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:47,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:47,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457691309] [2024-02-07 14:33:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457691309] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:47,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:47,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:47,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122801727] [2024-02-07 14:33:47,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:47,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:47,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:47,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:47,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 277 transitions, 4649 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:47,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:47,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:47,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:48,485 INFO L124 PetriNetUnfolderBase]: 2420/3737 cut-off events. [2024-02-07 14:33:48,485 INFO L125 PetriNetUnfolderBase]: For 51565/51565 co-relation queries the response was YES. [2024-02-07 14:33:48,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25985 conditions, 3737 events. 2420/3737 cut-off events. For 51565/51565 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19121 event pairs, 758 based on Foata normal form. 16/3753 useless extension candidates. Maximal degree in co-relation 25926. Up to 3212 conditions per place. [2024-02-07 14:33:48,514 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 237 selfloop transitions, 106 changer transitions 0/344 dead transitions. [2024-02-07 14:33:48,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 344 transitions, 6078 flow [2024-02-07 14:33:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-02-07 14:33:48,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369458128078818 [2024-02-07 14:33:48,516 INFO L175 Difference]: Start difference. First operand has 150 places, 277 transitions, 4649 flow. Second operand 7 states and 109 transitions. [2024-02-07 14:33:48,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 344 transitions, 6078 flow [2024-02-07 14:33:48,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 344 transitions, 5924 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-02-07 14:33:48,673 INFO L231 Difference]: Finished difference. Result has 155 places, 303 transitions, 5316 flow [2024-02-07 14:33:48,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5316, PETRI_PLACES=155, PETRI_TRANSITIONS=303} [2024-02-07 14:33:48,674 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 123 predicate places. [2024-02-07 14:33:48,674 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 303 transitions, 5316 flow [2024-02-07 14:33:48,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:48,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:48,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:48,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-07 14:33:48,675 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:48,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:48,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1833334308, now seen corresponding path program 6 times [2024-02-07 14:33:48,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:48,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52438637] [2024-02-07 14:33:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:48,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:48,803 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 14:33:48,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52438637] [2024-02-07 14:33:48,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52438637] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:48,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577390932] [2024-02-07 14:33:48,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:33:48,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:48,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:48,805 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 14:33:48,810 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 14:33:48,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 14:33:48,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:48,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:33:48,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:48,953 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 14:33:48,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:49,047 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 14:33:49,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577390932] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:49,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:49,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 14:33:49,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501379026] [2024-02-07 14:33:49,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:49,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:33:49,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:49,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:33:49,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:33:49,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:33:49,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 303 transitions, 5316 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:33:49,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:49,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:33:49,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:49,712 INFO L124 PetriNetUnfolderBase]: 2408/3712 cut-off events. [2024-02-07 14:33:49,712 INFO L125 PetriNetUnfolderBase]: For 55215/55215 co-relation queries the response was YES. [2024-02-07 14:33:49,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27167 conditions, 3712 events. 2408/3712 cut-off events. For 55215/55215 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18879 event pairs, 666 based on Foata normal form. 10/3722 useless extension candidates. Maximal degree in co-relation 27104. Up to 2442 conditions per place. [2024-02-07 14:33:49,743 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 245 selfloop transitions, 99 changer transitions 0/345 dead transitions. [2024-02-07 14:33:49,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 345 transitions, 6228 flow [2024-02-07 14:33:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:33:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:33:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 109 transitions. [2024-02-07 14:33:49,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4698275862068966 [2024-02-07 14:33:49,744 INFO L175 Difference]: Start difference. First operand has 155 places, 303 transitions, 5316 flow. Second operand 8 states and 109 transitions. [2024-02-07 14:33:49,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 345 transitions, 6228 flow [2024-02-07 14:33:49,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 345 transitions, 6088 flow, removed 70 selfloop flow, removed 0 redundant places. [2024-02-07 14:33:49,912 INFO L231 Difference]: Finished difference. Result has 162 places, 303 transitions, 5374 flow [2024-02-07 14:33:49,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5374, PETRI_PLACES=162, PETRI_TRANSITIONS=303} [2024-02-07 14:33:49,913 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 130 predicate places. [2024-02-07 14:33:49,913 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 303 transitions, 5374 flow [2024-02-07 14:33:49,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:33:49,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:49,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:49,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-02-07 14:33:50,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:50,122 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:50,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:50,123 INFO L85 PathProgramCache]: Analyzing trace with hash 70572553, now seen corresponding path program 12 times [2024-02-07 14:33:50,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:50,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679820678] [2024-02-07 14:33:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:50,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:50,312 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 14:33:50,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:50,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679820678] [2024-02-07 14:33:50,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679820678] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:50,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670622940] [2024-02-07 14:33:50,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:33:50,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:50,314 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 14:33:50,315 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 14:33:50,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 14:33:50,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:50,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:33:50,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:50,493 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 14:33:50,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:50,834 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 14:33:50,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670622940] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:50,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:50,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 13 [2024-02-07 14:33:50,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072669460] [2024-02-07 14:33:50,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:50,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:33:50,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:50,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:33:50,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:33:50,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:33:50,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 303 transitions, 5374 flow. Second operand has 13 states, 13 states have (on average 6.769230769230769) internal successors, (88), 13 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 14:33:50,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:50,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:33:50,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:52,202 INFO L124 PetriNetUnfolderBase]: 3491/5438 cut-off events. [2024-02-07 14:33:52,202 INFO L125 PetriNetUnfolderBase]: For 82403/82403 co-relation queries the response was YES. [2024-02-07 14:33:52,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40044 conditions, 5438 events. 3491/5438 cut-off events. For 82403/82403 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30521 event pairs, 531 based on Foata normal form. 26/5464 useless extension candidates. Maximal degree in co-relation 39980. Up to 2326 conditions per place. [2024-02-07 14:33:52,244 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 282 selfloop transitions, 315 changer transitions 0/598 dead transitions. [2024-02-07 14:33:52,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 598 transitions, 10447 flow [2024-02-07 14:33:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 14:33:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 14:33:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 273 transitions. [2024-02-07 14:33:52,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4706896551724138 [2024-02-07 14:33:52,249 INFO L175 Difference]: Start difference. First operand has 162 places, 303 transitions, 5374 flow. Second operand 20 states and 273 transitions. [2024-02-07 14:33:52,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 598 transitions, 10447 flow [2024-02-07 14:33:52,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 598 transitions, 10240 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-02-07 14:33:52,505 INFO L231 Difference]: Finished difference. Result has 184 places, 445 transitions, 9107 flow [2024-02-07 14:33:52,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9107, PETRI_PLACES=184, PETRI_TRANSITIONS=445} [2024-02-07 14:33:52,506 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 152 predicate places. [2024-02-07 14:33:52,506 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 445 transitions, 9107 flow [2024-02-07 14:33:52,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.769230769230769) internal successors, (88), 13 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 14:33:52,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:52,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:52,518 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 14:33:52,718 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,SelfDestructingSolverStorable20 [2024-02-07 14:33:52,719 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:52,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:52,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1636741309, now seen corresponding path program 13 times [2024-02-07 14:33:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:52,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225979509] [2024-02-07 14:33:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:52,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:52,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:52,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225979509] [2024-02-07 14:33:52,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225979509] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:52,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:52,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:52,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114983596] [2024-02-07 14:33:52,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:52,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:52,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:52,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:52,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 445 transitions, 9107 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:52,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:52,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:52,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:53,899 INFO L124 PetriNetUnfolderBase]: 3508/5461 cut-off events. [2024-02-07 14:33:53,899 INFO L125 PetriNetUnfolderBase]: For 111998/111998 co-relation queries the response was YES. [2024-02-07 14:33:53,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44869 conditions, 5461 events. 3508/5461 cut-off events. For 111998/111998 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30467 event pairs, 1059 based on Foata normal form. 2/5463 useless extension candidates. Maximal degree in co-relation 44797. Up to 5047 conditions per place. [2024-02-07 14:33:53,948 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 376 selfloop transitions, 94 changer transitions 2/473 dead transitions. [2024-02-07 14:33:53,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 473 transitions, 10355 flow [2024-02-07 14:33:53,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-02-07 14:33:53,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458128078817734 [2024-02-07 14:33:53,950 INFO L175 Difference]: Start difference. First operand has 184 places, 445 transitions, 9107 flow. Second operand 7 states and 93 transitions. [2024-02-07 14:33:53,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 473 transitions, 10355 flow [2024-02-07 14:33:54,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 473 transitions, 10023 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-02-07 14:33:54,325 INFO L231 Difference]: Finished difference. Result has 187 places, 455 transitions, 9198 flow [2024-02-07 14:33:54,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8791, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9198, PETRI_PLACES=187, PETRI_TRANSITIONS=455} [2024-02-07 14:33:54,326 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 155 predicate places. [2024-02-07 14:33:54,326 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 455 transitions, 9198 flow [2024-02-07 14:33:54,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:54,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:54,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-02-07 14:33:54,327 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:54,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:54,327 INFO L85 PathProgramCache]: Analyzing trace with hash -538624195, now seen corresponding path program 14 times [2024-02-07 14:33:54,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:54,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161707123] [2024-02-07 14:33:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:54,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:54,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161707123] [2024-02-07 14:33:54,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161707123] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:54,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:54,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:54,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064085790] [2024-02-07 14:33:54,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:54,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:54,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:54,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:54,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:54,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 455 transitions, 9198 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:54,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:54,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:54,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:55,452 INFO L124 PetriNetUnfolderBase]: 3513/5468 cut-off events. [2024-02-07 14:33:55,452 INFO L125 PetriNetUnfolderBase]: For 106698/106698 co-relation queries the response was YES. [2024-02-07 14:33:55,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44350 conditions, 5468 events. 3513/5468 cut-off events. For 106698/106698 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30492 event pairs, 1067 based on Foata normal form. 2/5470 useless extension candidates. Maximal degree in co-relation 44276. Up to 5051 conditions per place. [2024-02-07 14:33:55,510 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 384 selfloop transitions, 92 changer transitions 2/479 dead transitions. [2024-02-07 14:33:55,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 479 transitions, 10369 flow [2024-02-07 14:33:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:55,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:55,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-02-07 14:33:55,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2024-02-07 14:33:55,511 INFO L175 Difference]: Start difference. First operand has 187 places, 455 transitions, 9198 flow. Second operand 7 states and 95 transitions. [2024-02-07 14:33:55,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 479 transitions, 10369 flow [2024-02-07 14:33:55,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 479 transitions, 10167 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-02-07 14:33:55,916 INFO L231 Difference]: Finished difference. Result has 191 places, 461 transitions, 9322 flow [2024-02-07 14:33:55,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9004, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9322, PETRI_PLACES=191, PETRI_TRANSITIONS=461} [2024-02-07 14:33:55,916 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 159 predicate places. [2024-02-07 14:33:55,917 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 461 transitions, 9322 flow [2024-02-07 14:33:55,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:55,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:55,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-02-07 14:33:55,917 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:55,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1446907679, now seen corresponding path program 15 times [2024-02-07 14:33:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:55,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152696014] [2024-02-07 14:33:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:55,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:56,033 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 14:33:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152696014] [2024-02-07 14:33:56,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152696014] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:56,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024078370] [2024-02-07 14:33:56,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:33:56,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:56,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:33:56,049 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:33:56,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-07 14:33:56,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:33:56,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:33:56,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjunts are in the unsatisfiable core [2024-02-07 14:33:56,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:33:56,214 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 14:33:56,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:33:56,319 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 14:33:56,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024078370] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:33:56,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:33:56,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 13 [2024-02-07 14:33:56,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846644572] [2024-02-07 14:33:56,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:33:56,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:33:56,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:33:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:33:56,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:33:56,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 461 transitions, 9322 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:33:56,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:56,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:33:56,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:57,567 INFO L124 PetriNetUnfolderBase]: 3534/5498 cut-off events. [2024-02-07 14:33:57,567 INFO L125 PetriNetUnfolderBase]: For 104914/104914 co-relation queries the response was YES. [2024-02-07 14:33:57,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44732 conditions, 5498 events. 3534/5498 cut-off events. For 104914/104914 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30828 event pairs, 813 based on Foata normal form. 22/5520 useless extension candidates. Maximal degree in co-relation 44656. Up to 4178 conditions per place. [2024-02-07 14:33:57,612 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 344 selfloop transitions, 225 changer transitions 0/570 dead transitions. [2024-02-07 14:33:57,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 570 transitions, 11540 flow [2024-02-07 14:33:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:33:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:33:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 187 transitions. [2024-02-07 14:33:57,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4605911330049261 [2024-02-07 14:33:57,613 INFO L175 Difference]: Start difference. First operand has 191 places, 461 transitions, 9322 flow. Second operand 14 states and 187 transitions. [2024-02-07 14:33:57,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 570 transitions, 11540 flow [2024-02-07 14:33:57,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 570 transitions, 11369 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-02-07 14:33:57,960 INFO L231 Difference]: Finished difference. Result has 209 places, 481 transitions, 10146 flow [2024-02-07 14:33:57,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9151, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10146, PETRI_PLACES=209, PETRI_TRANSITIONS=481} [2024-02-07 14:33:57,961 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 177 predicate places. [2024-02-07 14:33:57,961 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 481 transitions, 10146 flow [2024-02-07 14:33:57,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:33:57,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:57,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:57,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-02-07 14:33:58,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-02-07 14:33:58,176 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:58,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1007447617, now seen corresponding path program 16 times [2024-02-07 14:33:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:58,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869564100] [2024-02-07 14:33:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:58,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:33:58,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:58,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869564100] [2024-02-07 14:33:58,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869564100] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:33:58,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:33:58,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:33:58,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79307159] [2024-02-07 14:33:58,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:33:58,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:33:58,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:33:58,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:33:58,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:33:58,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:33:58,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 481 transitions, 10146 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:58,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:33:58,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:33:58,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:33:59,431 INFO L124 PetriNetUnfolderBase]: 3550/5522 cut-off events. [2024-02-07 14:33:59,431 INFO L125 PetriNetUnfolderBase]: For 113995/113995 co-relation queries the response was YES. [2024-02-07 14:33:59,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46522 conditions, 5522 events. 3550/5522 cut-off events. For 113995/113995 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30805 event pairs, 1077 based on Foata normal form. 2/5524 useless extension candidates. Maximal degree in co-relation 46438. Up to 5097 conditions per place. [2024-02-07 14:33:59,480 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 404 selfloop transitions, 101 changer transitions 2/508 dead transitions. [2024-02-07 14:33:59,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 508 transitions, 11448 flow [2024-02-07 14:33:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:33:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:33:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-02-07 14:33:59,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-02-07 14:33:59,481 INFO L175 Difference]: Start difference. First operand has 209 places, 481 transitions, 10146 flow. Second operand 7 states and 92 transitions. [2024-02-07 14:33:59,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 508 transitions, 11448 flow [2024-02-07 14:33:59,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 508 transitions, 11227 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-02-07 14:33:59,892 INFO L231 Difference]: Finished difference. Result has 213 places, 487 transitions, 10292 flow [2024-02-07 14:33:59,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9938, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10292, PETRI_PLACES=213, PETRI_TRANSITIONS=487} [2024-02-07 14:33:59,892 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 181 predicate places. [2024-02-07 14:33:59,892 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 487 transitions, 10292 flow [2024-02-07 14:33:59,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:33:59,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:33:59,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:33:59,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-02-07 14:33:59,893 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:33:59,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:33:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash -609108525, now seen corresponding path program 17 times [2024-02-07 14:33:59,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:33:59,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052511008] [2024-02-07 14:33:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:33:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:33:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:33:59,991 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 14:33:59,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:33:59,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052511008] [2024-02-07 14:33:59,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052511008] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:33:59,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068619454] [2024-02-07 14:33:59,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:33:59,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:33:59,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:34:00,008 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:34:00,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-07 14:34:00,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:34:00,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:34:00,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 14:34:00,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:34:00,185 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 14:34:00,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:00,277 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 14:34:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068619454] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:34:00,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:34:00,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 12 [2024-02-07 14:34:00,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27511272] [2024-02-07 14:34:00,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:34:00,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:34:00,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:00,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:34:00,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:34:00,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:00,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 487 transitions, 10292 flow. Second operand has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 12 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 14:34:00,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:00,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:00,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:01,549 INFO L124 PetriNetUnfolderBase]: 3544/5484 cut-off events. [2024-02-07 14:34:01,549 INFO L125 PetriNetUnfolderBase]: For 108990/108990 co-relation queries the response was YES. [2024-02-07 14:34:01,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46530 conditions, 5484 events. 3544/5484 cut-off events. For 108990/108990 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30466 event pairs, 832 based on Foata normal form. 16/5500 useless extension candidates. Maximal degree in co-relation 46443. Up to 4209 conditions per place. [2024-02-07 14:34:01,606 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 349 selfloop transitions, 229 changer transitions 0/579 dead transitions. [2024-02-07 14:34:01,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 579 transitions, 12268 flow [2024-02-07 14:34:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:34:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:34:01,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 204 transitions. [2024-02-07 14:34:01,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689655172413793 [2024-02-07 14:34:01,607 INFO L175 Difference]: Start difference. First operand has 213 places, 487 transitions, 10292 flow. Second operand 15 states and 204 transitions. [2024-02-07 14:34:01,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 579 transitions, 12268 flow [2024-02-07 14:34:02,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 579 transitions, 12050 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-02-07 14:34:02,106 INFO L231 Difference]: Finished difference. Result has 223 places, 493 transitions, 10656 flow [2024-02-07 14:34:02,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10074, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10656, PETRI_PLACES=223, PETRI_TRANSITIONS=493} [2024-02-07 14:34:02,107 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 191 predicate places. [2024-02-07 14:34:02,107 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 493 transitions, 10656 flow [2024-02-07 14:34:02,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.916666666666667) internal successors, (95), 12 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 14:34:02,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:02,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:02,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-02-07 14:34:02,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:02,318 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:02,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:02,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1568159925, now seen corresponding path program 18 times [2024-02-07 14:34:02,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:02,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811353432] [2024-02-07 14:34:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:02,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:02,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:02,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811353432] [2024-02-07 14:34:02,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811353432] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:02,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:02,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:02,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010692590] [2024-02-07 14:34:02,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:02,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:02,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:34:02,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 493 transitions, 10656 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:34:02,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:02,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:34:02,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:03,392 INFO L124 PetriNetUnfolderBase]: 3552/5498 cut-off events. [2024-02-07 14:34:03,393 INFO L125 PetriNetUnfolderBase]: For 116224/116224 co-relation queries the response was YES. [2024-02-07 14:34:03,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47432 conditions, 5498 events. 3552/5498 cut-off events. For 116224/116224 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30498 event pairs, 1078 based on Foata normal form. 6/5504 useless extension candidates. Maximal degree in co-relation 47345. Up to 5070 conditions per place. [2024-02-07 14:34:03,448 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 415 selfloop transitions, 99 changer transitions 0/515 dead transitions. [2024-02-07 14:34:03,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 515 transitions, 11832 flow [2024-02-07 14:34:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:03,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-02-07 14:34:03,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2024-02-07 14:34:03,450 INFO L175 Difference]: Start difference. First operand has 223 places, 493 transitions, 10656 flow. Second operand 7 states and 92 transitions. [2024-02-07 14:34:03,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 515 transitions, 11832 flow [2024-02-07 14:34:03,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 515 transitions, 11368 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-02-07 14:34:03,933 INFO L231 Difference]: Finished difference. Result has 220 places, 494 transitions, 10418 flow [2024-02-07 14:34:03,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10194, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10418, PETRI_PLACES=220, PETRI_TRANSITIONS=494} [2024-02-07 14:34:03,934 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 188 predicate places. [2024-02-07 14:34:03,934 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 494 transitions, 10418 flow [2024-02-07 14:34:03,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:34:03,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:03,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:03,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-02-07 14:34:03,934 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:03,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2021759133, now seen corresponding path program 19 times [2024-02-07 14:34:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:03,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727884118] [2024-02-07 14:34:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:03,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:04,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:04,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727884118] [2024-02-07 14:34:04,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727884118] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:04,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:04,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:04,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643935584] [2024-02-07 14:34:04,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:04,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:04,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:04,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:04,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:04,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:04,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 494 transitions, 10418 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:04,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:04,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:04,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:05,159 INFO L124 PetriNetUnfolderBase]: 3551/5499 cut-off events. [2024-02-07 14:34:05,159 INFO L125 PetriNetUnfolderBase]: For 111703/111703 co-relation queries the response was YES. [2024-02-07 14:34:05,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46613 conditions, 5499 events. 3551/5499 cut-off events. For 111703/111703 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30553 event pairs, 1078 based on Foata normal form. 2/5501 useless extension candidates. Maximal degree in co-relation 46525. Up to 5080 conditions per place. [2024-02-07 14:34:05,233 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 411 selfloop transitions, 99 changer transitions 2/513 dead transitions. [2024-02-07 14:34:05,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 513 transitions, 11569 flow [2024-02-07 14:34:05,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:05,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-02-07 14:34:05,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46798029556650245 [2024-02-07 14:34:05,235 INFO L175 Difference]: Start difference. First operand has 220 places, 494 transitions, 10418 flow. Second operand 7 states and 95 transitions. [2024-02-07 14:34:05,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 513 transitions, 11569 flow [2024-02-07 14:34:05,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 513 transitions, 11375 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-02-07 14:34:05,813 INFO L231 Difference]: Finished difference. Result has 223 places, 495 transitions, 10451 flow [2024-02-07 14:34:05,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10224, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10451, PETRI_PLACES=223, PETRI_TRANSITIONS=495} [2024-02-07 14:34:05,814 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 191 predicate places. [2024-02-07 14:34:05,814 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 495 transitions, 10451 flow [2024-02-07 14:34:05,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:05,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:05,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:05,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-02-07 14:34:05,815 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:05,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1175091049, now seen corresponding path program 20 times [2024-02-07 14:34:05,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:05,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365497995] [2024-02-07 14:34:05,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:05,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:05,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:05,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365497995] [2024-02-07 14:34:05,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365497995] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:05,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:05,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208646835] [2024-02-07 14:34:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:05,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:05,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:05,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:05,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 495 transitions, 10451 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:05,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:05,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:05,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:07,100 INFO L124 PetriNetUnfolderBase]: 3548/5494 cut-off events. [2024-02-07 14:34:07,100 INFO L125 PetriNetUnfolderBase]: For 110950/110950 co-relation queries the response was YES. [2024-02-07 14:34:07,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46566 conditions, 5494 events. 3548/5494 cut-off events. For 110950/110950 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30468 event pairs, 1074 based on Foata normal form. 2/5496 useless extension candidates. Maximal degree in co-relation 46477. Up to 5078 conditions per place. [2024-02-07 14:34:07,168 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 405 selfloop transitions, 103 changer transitions 2/511 dead transitions. [2024-02-07 14:34:07,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 511 transitions, 11549 flow [2024-02-07 14:34:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-02-07 14:34:07,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458128078817734 [2024-02-07 14:34:07,171 INFO L175 Difference]: Start difference. First operand has 223 places, 495 transitions, 10451 flow. Second operand 7 states and 93 transitions. [2024-02-07 14:34:07,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 511 transitions, 11549 flow [2024-02-07 14:34:07,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 511 transitions, 11430 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-02-07 14:34:07,719 INFO L231 Difference]: Finished difference. Result has 226 places, 494 transitions, 10512 flow [2024-02-07 14:34:07,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10300, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10512, PETRI_PLACES=226, PETRI_TRANSITIONS=494} [2024-02-07 14:34:07,722 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 194 predicate places. [2024-02-07 14:34:07,722 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 494 transitions, 10512 flow [2024-02-07 14:34:07,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:07,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:07,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:07,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-02-07 14:34:07,723 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:07,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:07,723 INFO L85 PathProgramCache]: Analyzing trace with hash 272301531, now seen corresponding path program 21 times [2024-02-07 14:34:07,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:07,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387465837] [2024-02-07 14:34:07,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:07,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:07,849 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 14:34:07,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:07,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387465837] [2024-02-07 14:34:07,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387465837] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:07,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5742588] [2024-02-07 14:34:07,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:34:07,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:07,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:34:07,850 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:34:07,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-07 14:34:07,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:34:07,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:34:07,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:34:07,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:34:08,022 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 14:34:08,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:08,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5742588] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:08,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:34:08,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 14 [2024-02-07 14:34:08,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707042470] [2024-02-07 14:34:08,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:08,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:34:08,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:34:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:34:08,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:08,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 494 transitions, 10512 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:34:08,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:08,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:08,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:09,217 INFO L124 PetriNetUnfolderBase]: 3615/5620 cut-off events. [2024-02-07 14:34:09,217 INFO L125 PetriNetUnfolderBase]: For 111277/111277 co-relation queries the response was YES. [2024-02-07 14:34:09,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47651 conditions, 5620 events. 3615/5620 cut-off events. For 111277/111277 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 31479 event pairs, 905 based on Foata normal form. 12/5632 useless extension candidates. Maximal degree in co-relation 47561. Up to 4698 conditions per place. [2024-02-07 14:34:09,288 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 368 selfloop transitions, 195 changer transitions 0/564 dead transitions. [2024-02-07 14:34:09,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 564 transitions, 12620 flow [2024-02-07 14:34:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-07 14:34:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-07 14:34:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-02-07 14:34:09,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5459770114942529 [2024-02-07 14:34:09,290 INFO L175 Difference]: Start difference. First operand has 226 places, 494 transitions, 10512 flow. Second operand 6 states and 95 transitions. [2024-02-07 14:34:09,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 564 transitions, 12620 flow [2024-02-07 14:34:09,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 564 transitions, 12488 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-02-07 14:34:09,952 INFO L231 Difference]: Finished difference. Result has 231 places, 525 transitions, 11633 flow [2024-02-07 14:34:09,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=10383, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11633, PETRI_PLACES=231, PETRI_TRANSITIONS=525} [2024-02-07 14:34:09,953 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 199 predicate places. [2024-02-07 14:34:09,953 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 525 transitions, 11633 flow [2024-02-07 14:34:09,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:34:09,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:09,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:09,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-07 14:34:10,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:10,166 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:10,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:10,167 INFO L85 PathProgramCache]: Analyzing trace with hash -495479721, now seen corresponding path program 22 times [2024-02-07 14:34:10,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:10,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728788625] [2024-02-07 14:34:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:10,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:10,313 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 14:34:10,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728788625] [2024-02-07 14:34:10,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728788625] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610833789] [2024-02-07 14:34:10,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:34:10,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:10,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:34:10,315 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:34:10,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-07 14:34:10,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:34:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:34:10,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:34:10,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:34:10,460 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 14:34:10,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:10,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610833789] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:10,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:34:10,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2024-02-07 14:34:10,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782482634] [2024-02-07 14:34:10,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:10,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:34:10,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:10,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:34:10,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:34:10,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:10,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 525 transitions, 11633 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:34:10,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:10,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:10,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:11,924 INFO L124 PetriNetUnfolderBase]: 4031/6197 cut-off events. [2024-02-07 14:34:11,924 INFO L125 PetriNetUnfolderBase]: For 126681/126681 co-relation queries the response was YES. [2024-02-07 14:34:11,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53642 conditions, 6197 events. 4031/6197 cut-off events. For 126681/126681 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 34759 event pairs, 689 based on Foata normal form. 12/6209 useless extension candidates. Maximal degree in co-relation 53548. Up to 3622 conditions per place. [2024-02-07 14:34:12,001 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 330 selfloop transitions, 303 changer transitions 0/634 dead transitions. [2024-02-07 14:34:12,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 634 transitions, 14431 flow [2024-02-07 14:34:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-02-07 14:34:12,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5911330049261084 [2024-02-07 14:34:12,002 INFO L175 Difference]: Start difference. First operand has 231 places, 525 transitions, 11633 flow. Second operand 7 states and 120 transitions. [2024-02-07 14:34:12,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 634 transitions, 14431 flow [2024-02-07 14:34:12,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 634 transitions, 14218 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-02-07 14:34:12,749 INFO L231 Difference]: Finished difference. Result has 241 places, 564 transitions, 13403 flow [2024-02-07 14:34:12,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11435, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13403, PETRI_PLACES=241, PETRI_TRANSITIONS=564} [2024-02-07 14:34:12,750 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 209 predicate places. [2024-02-07 14:34:12,750 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 564 transitions, 13403 flow [2024-02-07 14:34:12,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 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 14:34:12,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:12,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:12,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-02-07 14:34:12,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:12,963 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:12,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash -635816661, now seen corresponding path program 2 times [2024-02-07 14:34:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:12,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073993499] [2024-02-07 14:34:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:12,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:13,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:13,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073993499] [2024-02-07 14:34:13,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073993499] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:13,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:13,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:13,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891045018] [2024-02-07 14:34:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:13,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:13,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:13,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:13,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:13,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:13,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 564 transitions, 13403 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:13,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:13,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:13,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:14,470 INFO L124 PetriNetUnfolderBase]: 4042/6256 cut-off events. [2024-02-07 14:34:14,471 INFO L125 PetriNetUnfolderBase]: For 155013/155013 co-relation queries the response was YES. [2024-02-07 14:34:14,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56984 conditions, 6256 events. 4042/6256 cut-off events. For 155013/155013 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35551 event pairs, 1164 based on Foata normal form. 24/6280 useless extension candidates. Maximal degree in co-relation 56886. Up to 5605 conditions per place. [2024-02-07 14:34:14,550 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 488 selfloop transitions, 108 changer transitions 10/607 dead transitions. [2024-02-07 14:34:14,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 607 transitions, 14922 flow [2024-02-07 14:34:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-02-07 14:34:14,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369458128078818 [2024-02-07 14:34:14,551 INFO L175 Difference]: Start difference. First operand has 241 places, 564 transitions, 13403 flow. Second operand 7 states and 109 transitions. [2024-02-07 14:34:14,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 607 transitions, 14922 flow [2024-02-07 14:34:15,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 607 transitions, 14885 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-02-07 14:34:15,359 INFO L231 Difference]: Finished difference. Result has 249 places, 565 transitions, 13642 flow [2024-02-07 14:34:15,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13370, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13642, PETRI_PLACES=249, PETRI_TRANSITIONS=565} [2024-02-07 14:34:15,360 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 217 predicate places. [2024-02-07 14:34:15,360 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 565 transitions, 13642 flow [2024-02-07 14:34:15,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:15,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:15,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:15,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-02-07 14:34:15,360 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:15,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:15,361 INFO L85 PathProgramCache]: Analyzing trace with hash 807373764, now seen corresponding path program 7 times [2024-02-07 14:34:15,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:15,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178501394] [2024-02-07 14:34:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:15,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:15,449 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 14:34:15,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:15,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178501394] [2024-02-07 14:34:15,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178501394] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:15,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703888640] [2024-02-07 14:34:15,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:34:15,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:34:15,451 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:34:15,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-07 14:34:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:15,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 14:34:15,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:34:15,639 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 14:34:15,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:15,921 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 14:34:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703888640] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:34:15,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:34:15,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 14:34:15,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887969468] [2024-02-07 14:34:15,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:34:15,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:34:15,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:15,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:34:15,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:34:15,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:34:15,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 565 transitions, 13642 flow. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 14:34:15,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:15,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:34:15,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:17,512 INFO L124 PetriNetUnfolderBase]: 4355/6774 cut-off events. [2024-02-07 14:34:17,512 INFO L125 PetriNetUnfolderBase]: For 164339/164339 co-relation queries the response was YES. [2024-02-07 14:34:17,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61065 conditions, 6774 events. 4355/6774 cut-off events. For 164339/164339 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 39414 event pairs, 980 based on Foata normal form. 16/6790 useless extension candidates. Maximal degree in co-relation 60964. Up to 3959 conditions per place. [2024-02-07 14:34:17,588 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 370 selfloop transitions, 290 changer transitions 0/661 dead transitions. [2024-02-07 14:34:17,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 661 transitions, 16126 flow [2024-02-07 14:34:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:34:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:34:17,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 165 transitions. [2024-02-07 14:34:17,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47413793103448276 [2024-02-07 14:34:17,590 INFO L175 Difference]: Start difference. First operand has 249 places, 565 transitions, 13642 flow. Second operand 12 states and 165 transitions. [2024-02-07 14:34:17,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 661 transitions, 16126 flow [2024-02-07 14:34:18,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 661 transitions, 15887 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-02-07 14:34:18,363 INFO L231 Difference]: Finished difference. Result has 259 places, 587 transitions, 14880 flow [2024-02-07 14:34:18,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13423, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14880, PETRI_PLACES=259, PETRI_TRANSITIONS=587} [2024-02-07 14:34:18,363 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 227 predicate places. [2024-02-07 14:34:18,364 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 587 transitions, 14880 flow [2024-02-07 14:34:18,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 14:34:18,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:18,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:18,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-02-07 14:34:18,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:18,575 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:18,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:18,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1909013477, now seen corresponding path program 3 times [2024-02-07 14:34:18,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:18,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006387704] [2024-02-07 14:34:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:18,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:18,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006387704] [2024-02-07 14:34:18,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006387704] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:18,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:18,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:18,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099898062] [2024-02-07 14:34:18,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:18,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:18,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:18,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:18,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 587 transitions, 14880 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:18,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:18,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:18,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:20,170 INFO L124 PetriNetUnfolderBase]: 4367/6828 cut-off events. [2024-02-07 14:34:20,171 INFO L125 PetriNetUnfolderBase]: For 177444/177444 co-relation queries the response was YES. [2024-02-07 14:34:20,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63712 conditions, 6828 events. 4367/6828 cut-off events. For 177444/177444 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 40154 event pairs, 1374 based on Foata normal form. 18/6846 useless extension candidates. Maximal degree in co-relation 63608. Up to 6243 conditions per place. [2024-02-07 14:34:20,256 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 505 selfloop transitions, 105 changer transitions 12/623 dead transitions. [2024-02-07 14:34:20,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 623 transitions, 16338 flow [2024-02-07 14:34:20,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-02-07 14:34:20,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270935960591133 [2024-02-07 14:34:20,258 INFO L175 Difference]: Start difference. First operand has 259 places, 587 transitions, 14880 flow. Second operand 7 states and 107 transitions. [2024-02-07 14:34:20,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 623 transitions, 16338 flow [2024-02-07 14:34:21,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 623 transitions, 16035 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-02-07 14:34:21,169 INFO L231 Difference]: Finished difference. Result has 262 places, 583 transitions, 14685 flow [2024-02-07 14:34:21,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14578, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14685, PETRI_PLACES=262, PETRI_TRANSITIONS=583} [2024-02-07 14:34:21,171 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2024-02-07 14:34:21,171 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 583 transitions, 14685 flow [2024-02-07 14:34:21,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:21,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:21,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:21,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-02-07 14:34:21,172 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:21,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash -623981059, now seen corresponding path program 4 times [2024-02-07 14:34:21,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:21,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319967581] [2024-02-07 14:34:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:21,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:21,326 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 14:34:21,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319967581] [2024-02-07 14:34:21,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319967581] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:21,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282616956] [2024-02-07 14:34:21,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:34:21,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:21,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:34:21,328 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:34:21,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-02-07 14:34:21,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:34:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:34:21,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:34:21,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:34:21,538 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 14:34:21,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:21,627 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 14:34:21,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282616956] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:34:21,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:34:21,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 14:34:21,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898344988] [2024-02-07 14:34:21,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:34:21,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:34:21,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:21,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:34:21,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:34:21,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:34:21,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 583 transitions, 14685 flow. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:34:21,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:21,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:34:21,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:23,160 INFO L124 PetriNetUnfolderBase]: 4347/6774 cut-off events. [2024-02-07 14:34:23,161 INFO L125 PetriNetUnfolderBase]: For 180433/180433 co-relation queries the response was YES. [2024-02-07 14:34:23,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62950 conditions, 6774 events. 4347/6774 cut-off events. For 180433/180433 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 39501 event pairs, 1304 based on Foata normal form. 16/6790 useless extension candidates. Maximal degree in co-relation 62843. Up to 6167 conditions per place. [2024-02-07 14:34:23,242 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 499 selfloop transitions, 114 changer transitions 0/614 dead transitions. [2024-02-07 14:34:23,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 614 transitions, 16131 flow [2024-02-07 14:34:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:34:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:34:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-02-07 14:34:23,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2024-02-07 14:34:23,243 INFO L175 Difference]: Start difference. First operand has 262 places, 583 transitions, 14685 flow. Second operand 8 states and 100 transitions. [2024-02-07 14:34:23,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 614 transitions, 16131 flow [2024-02-07 14:34:24,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 614 transitions, 15915 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 14:34:24,189 INFO L231 Difference]: Finished difference. Result has 263 places, 586 transitions, 14769 flow [2024-02-07 14:34:24,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14471, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14769, PETRI_PLACES=263, PETRI_TRANSITIONS=586} [2024-02-07 14:34:24,190 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 231 predicate places. [2024-02-07 14:34:24,190 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 586 transitions, 14769 flow [2024-02-07 14:34:24,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 14:34:24,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:24,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:24,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-02-07 14:34:24,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:24,406 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:24,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:24,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1177916583, now seen corresponding path program 5 times [2024-02-07 14:34:24,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:24,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376805873] [2024-02-07 14:34:24,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:24,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:24,485 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 14:34:24,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:24,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376805873] [2024-02-07 14:34:24,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376805873] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:24,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931332800] [2024-02-07 14:34:24,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:34:24,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:34:24,487 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:34:24,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-02-07 14:34:24,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:34:24,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:34:24,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:34:24,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:34:24,615 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 14:34:24,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:24,680 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 14:34:24,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931332800] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:34:24,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:34:24,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 13 [2024-02-07 14:34:24,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120336389] [2024-02-07 14:34:24,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:34:24,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:34:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:34:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:34:24,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:34:24,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 586 transitions, 14769 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:34:24,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:24,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:34:24,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:26,273 INFO L124 PetriNetUnfolderBase]: 4345/6761 cut-off events. [2024-02-07 14:34:26,273 INFO L125 PetriNetUnfolderBase]: For 178752/178752 co-relation queries the response was YES. [2024-02-07 14:34:26,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63120 conditions, 6761 events. 4345/6761 cut-off events. For 178752/178752 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 39307 event pairs, 1352 based on Foata normal form. 4/6765 useless extension candidates. Maximal degree in co-relation 63013. Up to 6243 conditions per place. [2024-02-07 14:34:26,354 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 498 selfloop transitions, 111 changer transitions 0/610 dead transitions. [2024-02-07 14:34:26,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 610 transitions, 16171 flow [2024-02-07 14:34:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:34:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:34:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-02-07 14:34:26,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40086206896551724 [2024-02-07 14:34:26,358 INFO L175 Difference]: Start difference. First operand has 263 places, 586 transitions, 14769 flow. Second operand 8 states and 93 transitions. [2024-02-07 14:34:26,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 610 transitions, 16171 flow [2024-02-07 14:34:27,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 610 transitions, 15931 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-02-07 14:34:27,291 INFO L231 Difference]: Finished difference. Result has 265 places, 588 transitions, 14802 flow [2024-02-07 14:34:27,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14511, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14802, PETRI_PLACES=265, PETRI_TRANSITIONS=588} [2024-02-07 14:34:27,291 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 233 predicate places. [2024-02-07 14:34:27,291 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 588 transitions, 14802 flow [2024-02-07 14:34:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:34:27,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:27,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:27,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-02-07 14:34:27,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:27,503 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:27,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:27,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2060611991, now seen corresponding path program 23 times [2024-02-07 14:34:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:27,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555268014] [2024-02-07 14:34:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:27,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:27,589 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 14:34:27,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555268014] [2024-02-07 14:34:27,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555268014] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091246876] [2024-02-07 14:34:27,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:34:27,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:34:27,596 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:34:27,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-02-07 14:34:27,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:34:27,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:34:27,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:34:27,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:34:27,747 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 14:34:27,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:27,838 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 14:34:27,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091246876] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:34:27,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:34:27,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 13 [2024-02-07 14:34:27,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313440244] [2024-02-07 14:34:27,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:34:27,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 14:34:27,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:27,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 14:34:27,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-02-07 14:34:27,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:34:27,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 588 transitions, 14802 flow. Second operand has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 14:34:27,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:27,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:34:27,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:29,604 INFO L124 PetriNetUnfolderBase]: 4492/7032 cut-off events. [2024-02-07 14:34:29,604 INFO L125 PetriNetUnfolderBase]: For 183897/183897 co-relation queries the response was YES. [2024-02-07 14:34:29,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65485 conditions, 7032 events. 4492/7032 cut-off events. For 183897/183897 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 41768 event pairs, 1029 based on Foata normal form. 8/7040 useless extension candidates. Maximal degree in co-relation 65378. Up to 5096 conditions per place. [2024-02-07 14:34:29,703 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 448 selfloop transitions, 280 changer transitions 0/729 dead transitions. [2024-02-07 14:34:29,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 729 transitions, 18562 flow [2024-02-07 14:34:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:34:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:34:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 165 transitions. [2024-02-07 14:34:29,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4376657824933687 [2024-02-07 14:34:29,704 INFO L175 Difference]: Start difference. First operand has 265 places, 588 transitions, 14802 flow. Second operand 13 states and 165 transitions. [2024-02-07 14:34:29,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 729 transitions, 18562 flow [2024-02-07 14:34:30,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 729 transitions, 18342 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-02-07 14:34:30,690 INFO L231 Difference]: Finished difference. Result has 276 places, 638 transitions, 16730 flow [2024-02-07 14:34:30,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=14584, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=16730, PETRI_PLACES=276, PETRI_TRANSITIONS=638} [2024-02-07 14:34:30,691 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 244 predicate places. [2024-02-07 14:34:30,691 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 638 transitions, 16730 flow [2024-02-07 14:34:30,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 14:34:30,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:30,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:30,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-02-07 14:34:30,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-02-07 14:34:30,894 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:30,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash 311733270, now seen corresponding path program 8 times [2024-02-07 14:34:30,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:30,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20782585] [2024-02-07 14:34:30,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:30,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:31,019 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 14:34:31,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20782585] [2024-02-07 14:34:31,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20782585] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120017572] [2024-02-07 14:34:31,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:34:31,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:31,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:34:31,021 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:34:31,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-02-07 14:34:31,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:34:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:34:31,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:34:31,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:34:31,191 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 14:34:31,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:31,294 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 14:34:31,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120017572] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:34:31,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:34:31,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 14:34:31,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597229695] [2024-02-07 14:34:31,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:34:31,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:34:31,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:31,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:34:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:34:31,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:31,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 638 transitions, 16730 flow. Second operand has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 14:34:31,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:31,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:31,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:33,067 INFO L124 PetriNetUnfolderBase]: 4542/7106 cut-off events. [2024-02-07 14:34:33,067 INFO L125 PetriNetUnfolderBase]: For 203750/203750 co-relation queries the response was YES. [2024-02-07 14:34:33,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68582 conditions, 7106 events. 4542/7106 cut-off events. For 203750/203750 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 42133 event pairs, 1343 based on Foata normal form. 20/7126 useless extension candidates. Maximal degree in co-relation 68470. Up to 6534 conditions per place. [2024-02-07 14:34:33,148 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 553 selfloop transitions, 121 changer transitions 0/675 dead transitions. [2024-02-07 14:34:33,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 675 transitions, 18441 flow [2024-02-07 14:34:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:34:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:34:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-02-07 14:34:33,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-02-07 14:34:33,149 INFO L175 Difference]: Start difference. First operand has 276 places, 638 transitions, 16730 flow. Second operand 8 states and 112 transitions. [2024-02-07 14:34:33,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 675 transitions, 18441 flow [2024-02-07 14:34:34,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 675 transitions, 18297 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-02-07 14:34:34,105 INFO L231 Difference]: Finished difference. Result has 281 places, 644 transitions, 16983 flow [2024-02-07 14:34:34,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16586, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16983, PETRI_PLACES=281, PETRI_TRANSITIONS=644} [2024-02-07 14:34:34,106 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 249 predicate places. [2024-02-07 14:34:34,106 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 644 transitions, 16983 flow [2024-02-07 14:34:34,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.5) internal successors, (105), 14 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 14:34:34,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:34,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:34,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-02-07 14:34:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-02-07 14:34:34,318 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:34,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:34,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1665187298, now seen corresponding path program 9 times [2024-02-07 14:34:34,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:34,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239603567] [2024-02-07 14:34:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:34,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:34,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:34,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239603567] [2024-02-07 14:34:34,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239603567] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:34,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:34,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:34,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564981994] [2024-02-07 14:34:34,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:34,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:34,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:34,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:34,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:34,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:34,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 644 transitions, 16983 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:34,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:34,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:34,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:36,217 INFO L124 PetriNetUnfolderBase]: 4548/7116 cut-off events. [2024-02-07 14:34:36,217 INFO L125 PetriNetUnfolderBase]: For 204554/204554 co-relation queries the response was YES. [2024-02-07 14:34:36,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69044 conditions, 7116 events. 4548/7116 cut-off events. For 204554/204554 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 42214 event pairs, 1371 based on Foata normal form. 4/7120 useless extension candidates. Maximal degree in co-relation 68929. Up to 6575 conditions per place. [2024-02-07 14:34:36,311 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 552 selfloop transitions, 118 changer transitions 0/671 dead transitions. [2024-02-07 14:34:36,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 671 transitions, 18559 flow [2024-02-07 14:34:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-02-07 14:34:36,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073891625615764 [2024-02-07 14:34:36,312 INFO L175 Difference]: Start difference. First operand has 281 places, 644 transitions, 16983 flow. Second operand 7 states and 103 transitions. [2024-02-07 14:34:36,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 671 transitions, 18559 flow [2024-02-07 14:34:37,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 671 transitions, 18330 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-02-07 14:34:37,282 INFO L231 Difference]: Finished difference. Result has 282 places, 645 transitions, 17020 flow [2024-02-07 14:34:37,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16755, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17020, PETRI_PLACES=282, PETRI_TRANSITIONS=645} [2024-02-07 14:34:37,283 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 250 predicate places. [2024-02-07 14:34:37,283 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 645 transitions, 17020 flow [2024-02-07 14:34:37,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:37,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:37,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:37,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-02-07 14:34:37,284 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:37,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:37,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1772247910, now seen corresponding path program 10 times [2024-02-07 14:34:37,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:37,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38422645] [2024-02-07 14:34:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:37,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:37,374 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 14:34:37,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:37,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38422645] [2024-02-07 14:34:37,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38422645] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:34:37,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462108754] [2024-02-07 14:34:37,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:34:37,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:34:37,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:34:37,377 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:34:37,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-02-07 14:34:37,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:34:37,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:34:37,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:34:37,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:34:37,572 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 14:34:37,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:34:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:37,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462108754] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:34:37,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:34:37,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 14:34:37,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440244002] [2024-02-07 14:34:37,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:34:37,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:34:37,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:37,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:34:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:34:37,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:34:37,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 645 transitions, 17020 flow. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 14:34:37,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:37,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:34:37,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:39,886 INFO L124 PetriNetUnfolderBase]: 4715/7357 cut-off events. [2024-02-07 14:34:39,887 INFO L125 PetriNetUnfolderBase]: For 210648/210648 co-relation queries the response was YES. [2024-02-07 14:34:39,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71084 conditions, 7357 events. 4715/7357 cut-off events. For 210648/210648 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 43731 event pairs, 1320 based on Foata normal form. 30/7387 useless extension candidates. Maximal degree in co-relation 70969. Up to 6659 conditions per place. [2024-02-07 14:34:40,005 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 561 selfloop transitions, 161 changer transitions 0/723 dead transitions. [2024-02-07 14:34:40,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 723 transitions, 19479 flow [2024-02-07 14:34:40,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:34:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:34:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-02-07 14:34:40,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2024-02-07 14:34:40,007 INFO L175 Difference]: Start difference. First operand has 282 places, 645 transitions, 17020 flow. Second operand 12 states and 148 transitions. [2024-02-07 14:34:40,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 723 transitions, 19479 flow [2024-02-07 14:34:41,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 723 transitions, 19236 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:34:41,276 INFO L231 Difference]: Finished difference. Result has 295 places, 682 transitions, 18027 flow [2024-02-07 14:34:41,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=16789, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=18027, PETRI_PLACES=295, PETRI_TRANSITIONS=682} [2024-02-07 14:34:41,277 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 263 predicate places. [2024-02-07 14:34:41,277 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 682 transitions, 18027 flow [2024-02-07 14:34:41,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 14:34:41,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:41,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:41,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-02-07 14:34:41,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-02-07 14:34:41,491 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:41,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:41,491 INFO L85 PathProgramCache]: Analyzing trace with hash 857083448, now seen corresponding path program 11 times [2024-02-07 14:34:41,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:41,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731015253] [2024-02-07 14:34:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:41,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:41,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:41,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731015253] [2024-02-07 14:34:41,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731015253] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:41,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:41,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:41,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470209696] [2024-02-07 14:34:41,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:41,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:41,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:41,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:41,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 682 transitions, 18027 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:41,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:41,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:41,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:43,232 INFO L124 PetriNetUnfolderBase]: 4714/7360 cut-off events. [2024-02-07 14:34:43,232 INFO L125 PetriNetUnfolderBase]: For 237033/237033 co-relation queries the response was YES. [2024-02-07 14:34:43,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74676 conditions, 7360 events. 4714/7360 cut-off events. For 237033/237033 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 43852 event pairs, 1361 based on Foata normal form. 4/7364 useless extension candidates. Maximal degree in co-relation 74555. Up to 6795 conditions per place. [2024-02-07 14:34:43,333 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 581 selfloop transitions, 115 changer transitions 4/701 dead transitions. [2024-02-07 14:34:43,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 701 transitions, 19569 flow [2024-02-07 14:34:43,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 96 transitions. [2024-02-07 14:34:43,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4729064039408867 [2024-02-07 14:34:43,335 INFO L175 Difference]: Start difference. First operand has 295 places, 682 transitions, 18027 flow. Second operand 7 states and 96 transitions. [2024-02-07 14:34:43,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 701 transitions, 19569 flow [2024-02-07 14:34:44,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 701 transitions, 19295 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-02-07 14:34:44,622 INFO L231 Difference]: Finished difference. Result has 298 places, 681 transitions, 17951 flow [2024-02-07 14:34:44,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17753, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17951, PETRI_PLACES=298, PETRI_TRANSITIONS=681} [2024-02-07 14:34:44,624 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 266 predicate places. [2024-02-07 14:34:44,624 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 681 transitions, 17951 flow [2024-02-07 14:34:44,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:44,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:44,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:44,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-02-07 14:34:44,625 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:44,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:44,625 INFO L85 PathProgramCache]: Analyzing trace with hash 799927368, now seen corresponding path program 12 times [2024-02-07 14:34:44,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:44,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956385012] [2024-02-07 14:34:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:44,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:44,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:44,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956385012] [2024-02-07 14:34:44,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956385012] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:44,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:44,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:44,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969658246] [2024-02-07 14:34:44,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:44,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:44,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:44,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:44,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:44,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 681 transitions, 17951 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:44,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:44,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:44,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:46,667 INFO L124 PetriNetUnfolderBase]: 4712/7358 cut-off events. [2024-02-07 14:34:46,667 INFO L125 PetriNetUnfolderBase]: For 235467/235467 co-relation queries the response was YES. [2024-02-07 14:34:46,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74428 conditions, 7358 events. 4712/7358 cut-off events. For 235467/235467 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 43869 event pairs, 1358 based on Foata normal form. 4/7362 useless extension candidates. Maximal degree in co-relation 74306. Up to 6786 conditions per place. [2024-02-07 14:34:46,777 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 580 selfloop transitions, 117 changer transitions 4/702 dead transitions. [2024-02-07 14:34:46,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 702 transitions, 19500 flow [2024-02-07 14:34:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:46,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-02-07 14:34:46,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-02-07 14:34:46,778 INFO L175 Difference]: Start difference. First operand has 298 places, 681 transitions, 17951 flow. Second operand 7 states and 98 transitions. [2024-02-07 14:34:46,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 702 transitions, 19500 flow [2024-02-07 14:34:47,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 702 transitions, 19259 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-02-07 14:34:47,939 INFO L231 Difference]: Finished difference. Result has 297 places, 680 transitions, 17941 flow [2024-02-07 14:34:47,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17710, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17941, PETRI_PLACES=297, PETRI_TRANSITIONS=680} [2024-02-07 14:34:47,940 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 265 predicate places. [2024-02-07 14:34:47,940 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 680 transitions, 17941 flow [2024-02-07 14:34:47,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:47,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:47,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:47,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-02-07 14:34:47,941 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:47,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1713015846, now seen corresponding path program 13 times [2024-02-07 14:34:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:47,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054646136] [2024-02-07 14:34:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:47,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:48,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:48,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054646136] [2024-02-07 14:34:48,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054646136] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:48,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:48,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:48,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008495629] [2024-02-07 14:34:48,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:48,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:48,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:48,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:48,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:48,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 680 transitions, 17941 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:48,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:48,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:48,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:49,879 INFO L124 PetriNetUnfolderBase]: 4759/7425 cut-off events. [2024-02-07 14:34:49,880 INFO L125 PetriNetUnfolderBase]: For 237979/237979 co-relation queries the response was YES. [2024-02-07 14:34:49,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75074 conditions, 7425 events. 4759/7425 cut-off events. For 237979/237979 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 44255 event pairs, 1355 based on Foata normal form. 10/7435 useless extension candidates. Maximal degree in co-relation 74952. Up to 6815 conditions per place. [2024-02-07 14:34:49,978 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 591 selfloop transitions, 127 changer transitions 0/719 dead transitions. [2024-02-07 14:34:49,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 719 transitions, 19916 flow [2024-02-07 14:34:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-02-07 14:34:49,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123152709359606 [2024-02-07 14:34:49,980 INFO L175 Difference]: Start difference. First operand has 297 places, 680 transitions, 17941 flow. Second operand 7 states and 104 transitions. [2024-02-07 14:34:49,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 719 transitions, 19916 flow [2024-02-07 14:34:51,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 719 transitions, 19672 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-02-07 14:34:51,460 INFO L231 Difference]: Finished difference. Result has 298 places, 692 transitions, 18298 flow [2024-02-07 14:34:51,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17705, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18298, PETRI_PLACES=298, PETRI_TRANSITIONS=692} [2024-02-07 14:34:51,461 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 266 predicate places. [2024-02-07 14:34:51,461 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 692 transitions, 18298 flow [2024-02-07 14:34:51,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:51,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:51,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:51,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-02-07 14:34:51,462 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:51,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash -65582434, now seen corresponding path program 14 times [2024-02-07 14:34:51,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:51,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120600085] [2024-02-07 14:34:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:51,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:51,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:51,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120600085] [2024-02-07 14:34:51,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120600085] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:51,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:51,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:51,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955270532] [2024-02-07 14:34:51,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:51,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:51,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:51,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:34:51,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 692 transitions, 18298 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:34:51,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:51,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:34:51,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:53,545 INFO L124 PetriNetUnfolderBase]: 4765/7435 cut-off events. [2024-02-07 14:34:53,546 INFO L125 PetriNetUnfolderBase]: For 244192/244192 co-relation queries the response was YES. [2024-02-07 14:34:53,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75719 conditions, 7435 events. 4765/7435 cut-off events. For 244192/244192 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 44311 event pairs, 1359 based on Foata normal form. 4/7439 useless extension candidates. Maximal degree in co-relation 75596. Up to 6855 conditions per place. [2024-02-07 14:34:53,650 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 591 selfloop transitions, 120 changer transitions 0/712 dead transitions. [2024-02-07 14:34:53,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 712 transitions, 19925 flow [2024-02-07 14:34:53,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:53,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:53,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-02-07 14:34:53,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43842364532019706 [2024-02-07 14:34:53,651 INFO L175 Difference]: Start difference. First operand has 298 places, 692 transitions, 18298 flow. Second operand 7 states and 89 transitions. [2024-02-07 14:34:53,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 712 transitions, 19925 flow [2024-02-07 14:34:55,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 712 transitions, 19759 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-02-07 14:34:55,037 INFO L231 Difference]: Finished difference. Result has 301 places, 693 transitions, 18404 flow [2024-02-07 14:34:55,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18133, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18404, PETRI_PLACES=301, PETRI_TRANSITIONS=693} [2024-02-07 14:34:55,038 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 269 predicate places. [2024-02-07 14:34:55,038 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 693 transitions, 18404 flow [2024-02-07 14:34:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:34:55,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:55,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-02-07 14:34:55,039 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:55,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash 820215846, now seen corresponding path program 15 times [2024-02-07 14:34:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:55,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646690194] [2024-02-07 14:34:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:55,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:55,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:55,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646690194] [2024-02-07 14:34:55,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646690194] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:55,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:55,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136297851] [2024-02-07 14:34:55,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:55,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:55,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:55,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:55,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:55,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:55,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 693 transitions, 18404 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:55,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:55,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:55,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:34:57,015 INFO L124 PetriNetUnfolderBase]: 4771/7445 cut-off events. [2024-02-07 14:34:57,015 INFO L125 PetriNetUnfolderBase]: For 248362/248362 co-relation queries the response was YES. [2024-02-07 14:34:57,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75863 conditions, 7445 events. 4771/7445 cut-off events. For 248362/248362 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 44375 event pairs, 1365 based on Foata normal form. 4/7449 useless extension candidates. Maximal degree in co-relation 75740. Up to 6859 conditions per place. [2024-02-07 14:34:57,116 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 589 selfloop transitions, 125 changer transitions 0/715 dead transitions. [2024-02-07 14:34:57,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 715 transitions, 20065 flow [2024-02-07 14:34:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:34:57,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:34:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 100 transitions. [2024-02-07 14:34:57,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49261083743842365 [2024-02-07 14:34:57,117 INFO L175 Difference]: Start difference. First operand has 301 places, 693 transitions, 18404 flow. Second operand 7 states and 100 transitions. [2024-02-07 14:34:57,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 715 transitions, 20065 flow [2024-02-07 14:34:58,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 715 transitions, 19928 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:34:58,406 INFO L231 Difference]: Finished difference. Result has 303 places, 694 transitions, 18550 flow [2024-02-07 14:34:58,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18268, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18550, PETRI_PLACES=303, PETRI_TRANSITIONS=694} [2024-02-07 14:34:58,407 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 271 predicate places. [2024-02-07 14:34:58,408 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 694 transitions, 18550 flow [2024-02-07 14:34:58,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:58,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:34:58,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:34:58,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-02-07 14:34:58,408 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:34:58,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:34:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1547671825, now seen corresponding path program 24 times [2024-02-07 14:34:58,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:34:58,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227740791] [2024-02-07 14:34:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:34:58,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:34:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:34:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:34:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:34:58,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227740791] [2024-02-07 14:34:58,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227740791] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:34:58,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:34:58,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:34:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411521355] [2024-02-07 14:34:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:34:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:34:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:34:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:34:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:34:58,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:34:58,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 694 transitions, 18550 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:34:58,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:34:58,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:34:58,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:00,519 INFO L124 PetriNetUnfolderBase]: 4806/7500 cut-off events. [2024-02-07 14:35:00,519 INFO L125 PetriNetUnfolderBase]: For 252489/252489 co-relation queries the response was YES. [2024-02-07 14:35:00,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76503 conditions, 7500 events. 4806/7500 cut-off events. For 252489/252489 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 44768 event pairs, 1366 based on Foata normal form. 16/7516 useless extension candidates. Maximal degree in co-relation 76380. Up to 6878 conditions per place. [2024-02-07 14:35:00,609 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 598 selfloop transitions, 133 changer transitions 0/732 dead transitions. [2024-02-07 14:35:00,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 732 transitions, 20479 flow [2024-02-07 14:35:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:35:00,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:35:00,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-02-07 14:35:00,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221674876847291 [2024-02-07 14:35:00,610 INFO L175 Difference]: Start difference. First operand has 303 places, 694 transitions, 18550 flow. Second operand 7 states and 106 transitions. [2024-02-07 14:35:00,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 732 transitions, 20479 flow [2024-02-07 14:35:01,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 732 transitions, 20135 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 14:35:01,790 INFO L231 Difference]: Finished difference. Result has 305 places, 704 transitions, 18738 flow [2024-02-07 14:35:01,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18206, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18738, PETRI_PLACES=305, PETRI_TRANSITIONS=704} [2024-02-07 14:35:01,791 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 273 predicate places. [2024-02-07 14:35:01,791 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 704 transitions, 18738 flow [2024-02-07 14:35:01,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:01,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:01,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:01,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-02-07 14:35:01,791 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:01,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:01,792 INFO L85 PathProgramCache]: Analyzing trace with hash -684220023, now seen corresponding path program 25 times [2024-02-07 14:35:01,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:01,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229568037] [2024-02-07 14:35:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:01,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:01,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:01,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229568037] [2024-02-07 14:35:01,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229568037] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:01,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:01,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:35:01,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929420275] [2024-02-07 14:35:01,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:01,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:35:01,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:01,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:35:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:35:01,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:35:01,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 704 transitions, 18738 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:01,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:01,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:35:01,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:03,883 INFO L124 PetriNetUnfolderBase]: 4799/7486 cut-off events. [2024-02-07 14:35:03,883 INFO L125 PetriNetUnfolderBase]: For 252678/252678 co-relation queries the response was YES. [2024-02-07 14:35:03,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76583 conditions, 7486 events. 4799/7486 cut-off events. For 252678/252678 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 44739 event pairs, 1355 based on Foata normal form. 12/7498 useless extension candidates. Maximal degree in co-relation 76458. Up to 6869 conditions per place. [2024-02-07 14:35:03,992 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 598 selfloop transitions, 133 changer transitions 0/732 dead transitions. [2024-02-07 14:35:03,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 732 transitions, 20491 flow [2024-02-07 14:35:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:35:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:35:03,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-02-07 14:35:03,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123152709359606 [2024-02-07 14:35:03,994 INFO L175 Difference]: Start difference. First operand has 305 places, 704 transitions, 18738 flow. Second operand 7 states and 104 transitions. [2024-02-07 14:35:03,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 732 transitions, 20491 flow [2024-02-07 14:35:05,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 732 transitions, 20208 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-02-07 14:35:05,472 INFO L231 Difference]: Finished difference. Result has 308 places, 705 transitions, 18762 flow [2024-02-07 14:35:05,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18455, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=18762, PETRI_PLACES=308, PETRI_TRANSITIONS=705} [2024-02-07 14:35:05,473 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 276 predicate places. [2024-02-07 14:35:05,473 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 705 transitions, 18762 flow [2024-02-07 14:35:05,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:05,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:05,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:05,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-02-07 14:35:05,474 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:05,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2053628001, now seen corresponding path program 6 times [2024-02-07 14:35:05,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:05,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120685033] [2024-02-07 14:35:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:05,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:05,609 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 14:35:05,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:05,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120685033] [2024-02-07 14:35:05,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120685033] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:35:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022917494] [2024-02-07 14:35:05,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 14:35:05,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:35:05,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:35:05,611 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:35:05,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-02-07 14:35:05,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 14:35:05,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:35:05,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 14:35:05,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:35:05,823 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 14:35:05,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:35:05,946 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 14:35:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022917494] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:35:05,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:35:05,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 15 [2024-02-07 14:35:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372609335] [2024-02-07 14:35:05,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:35:05,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 14:35:05,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 14:35:05,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-02-07 14:35:05,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:35:05,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 705 transitions, 18762 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 14:35:05,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:05,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:35:05,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:08,162 INFO L124 PetriNetUnfolderBase]: 4857/7572 cut-off events. [2024-02-07 14:35:08,162 INFO L125 PetriNetUnfolderBase]: For 254943/254943 co-relation queries the response was YES. [2024-02-07 14:35:08,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77582 conditions, 7572 events. 4857/7572 cut-off events. For 254943/254943 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 45174 event pairs, 1403 based on Foata normal form. 8/7580 useless extension candidates. Maximal degree in co-relation 77456. Up to 6928 conditions per place. [2024-02-07 14:35:08,274 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 606 selfloop transitions, 134 changer transitions 0/741 dead transitions. [2024-02-07 14:35:08,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 741 transitions, 20757 flow [2024-02-07 14:35:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:35:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:35:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-02-07 14:35:08,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2024-02-07 14:35:08,277 INFO L175 Difference]: Start difference. First operand has 308 places, 705 transitions, 18762 flow. Second operand 9 states and 107 transitions. [2024-02-07 14:35:08,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 741 transitions, 20757 flow [2024-02-07 14:35:09,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 741 transitions, 20484 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-02-07 14:35:09,828 INFO L231 Difference]: Finished difference. Result has 314 places, 714 transitions, 19032 flow [2024-02-07 14:35:09,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18501, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19032, PETRI_PLACES=314, PETRI_TRANSITIONS=714} [2024-02-07 14:35:09,829 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 282 predicate places. [2024-02-07 14:35:09,829 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 714 transitions, 19032 flow [2024-02-07 14:35:09,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 14:35:09,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:09,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:09,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-02-07 14:35:10,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:35:10,042 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:10,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1601527615, now seen corresponding path program 26 times [2024-02-07 14:35:10,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:10,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869941435] [2024-02-07 14:35:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:10,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:10,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:10,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869941435] [2024-02-07 14:35:10,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869941435] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:10,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:35:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417140513] [2024-02-07 14:35:10,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:10,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:35:10,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:35:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:35:10,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:35:10,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 714 transitions, 19032 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:10,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:10,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:35:10,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:12,253 INFO L124 PetriNetUnfolderBase]: 4867/7590 cut-off events. [2024-02-07 14:35:12,253 INFO L125 PetriNetUnfolderBase]: For 254349/254349 co-relation queries the response was YES. [2024-02-07 14:35:12,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77986 conditions, 7590 events. 4867/7590 cut-off events. For 254349/254349 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 45442 event pairs, 1383 based on Foata normal form. 8/7598 useless extension candidates. Maximal degree in co-relation 77858. Up to 6967 conditions per place. [2024-02-07 14:35:12,343 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 608 selfloop transitions, 130 changer transitions 0/739 dead transitions. [2024-02-07 14:35:12,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 739 transitions, 20752 flow [2024-02-07 14:35:12,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:35:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:35:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-02-07 14:35:12,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458128078817734 [2024-02-07 14:35:12,353 INFO L175 Difference]: Start difference. First operand has 314 places, 714 transitions, 19032 flow. Second operand 7 states and 93 transitions. [2024-02-07 14:35:12,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 739 transitions, 20752 flow [2024-02-07 14:35:13,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 739 transitions, 20620 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-02-07 14:35:13,622 INFO L231 Difference]: Finished difference. Result has 317 places, 716 transitions, 19226 flow [2024-02-07 14:35:13,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18900, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19226, PETRI_PLACES=317, PETRI_TRANSITIONS=716} [2024-02-07 14:35:13,623 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 285 predicate places. [2024-02-07 14:35:13,623 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 716 transitions, 19226 flow [2024-02-07 14:35:13,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:13,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:13,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:13,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-02-07 14:35:13,624 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:13,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash 477121182, now seen corresponding path program 16 times [2024-02-07 14:35:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:13,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406672528] [2024-02-07 14:35:13,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:13,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:13,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:13,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406672528] [2024-02-07 14:35:13,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406672528] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:13,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:13,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:35:13,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229782568] [2024-02-07 14:35:13,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:35:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:35:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:35:13,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:35:13,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 716 transitions, 19226 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:13,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:13,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:35:13,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:15,714 INFO L124 PetriNetUnfolderBase]: 4874/7646 cut-off events. [2024-02-07 14:35:15,714 INFO L125 PetriNetUnfolderBase]: For 264042/264042 co-relation queries the response was YES. [2024-02-07 14:35:15,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78435 conditions, 7646 events. 4874/7646 cut-off events. For 264042/264042 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46220 event pairs, 1439 based on Foata normal form. 20/7666 useless extension candidates. Maximal degree in co-relation 78306. Up to 6962 conditions per place. [2024-02-07 14:35:15,830 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 594 selfloop transitions, 141 changer transitions 9/745 dead transitions. [2024-02-07 14:35:15,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 745 transitions, 20964 flow [2024-02-07 14:35:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:35:15,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:35:15,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 99 transitions. [2024-02-07 14:35:15,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876847290640394 [2024-02-07 14:35:15,831 INFO L175 Difference]: Start difference. First operand has 317 places, 716 transitions, 19226 flow. Second operand 7 states and 99 transitions. [2024-02-07 14:35:15,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 745 transitions, 20964 flow [2024-02-07 14:35:17,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 745 transitions, 20699 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-02-07 14:35:17,308 INFO L231 Difference]: Finished difference. Result has 320 places, 712 transitions, 19109 flow [2024-02-07 14:35:17,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18961, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=19109, PETRI_PLACES=320, PETRI_TRANSITIONS=712} [2024-02-07 14:35:17,309 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 288 predicate places. [2024-02-07 14:35:17,309 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 712 transitions, 19109 flow [2024-02-07 14:35:17,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:17,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:17,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:17,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-02-07 14:35:17,309 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:17,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:17,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1325484371, now seen corresponding path program 27 times [2024-02-07 14:35:17,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:17,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86975146] [2024-02-07 14:35:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:17,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:17,381 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 14:35:17,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:17,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86975146] [2024-02-07 14:35:17,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86975146] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:35:17,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493282361] [2024-02-07 14:35:17,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:35:17,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:35:17,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:35:17,383 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:35:17,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-02-07 14:35:17,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:35:17,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:35:17,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:35:17,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:35:17,552 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 14:35:17,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:35:17,602 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 14:35:17,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493282361] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:35:17,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:35:17,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 11 [2024-02-07 14:35:17,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34476917] [2024-02-07 14:35:17,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:35:17,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 14:35:17,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:17,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 14:35:17,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-02-07 14:35:17,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:35:17,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 712 transitions, 19109 flow. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:17,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:17,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:35:17,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:20,013 INFO L124 PetriNetUnfolderBase]: 5505/8685 cut-off events. [2024-02-07 14:35:20,014 INFO L125 PetriNetUnfolderBase]: For 288000/288000 co-relation queries the response was YES. [2024-02-07 14:35:20,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88962 conditions, 8685 events. 5505/8685 cut-off events. For 288000/288000 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 54185 event pairs, 806 based on Foata normal form. 10/8695 useless extension candidates. Maximal degree in co-relation 88831. Up to 3272 conditions per place. [2024-02-07 14:35:20,161 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 386 selfloop transitions, 587 changer transitions 0/974 dead transitions. [2024-02-07 14:35:20,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 974 transitions, 26205 flow [2024-02-07 14:35:20,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-02-07 14:35:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-02-07 14:35:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 236 transitions. [2024-02-07 14:35:20,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4787018255578093 [2024-02-07 14:35:20,162 INFO L175 Difference]: Start difference. First operand has 320 places, 712 transitions, 19109 flow. Second operand 17 states and 236 transitions. [2024-02-07 14:35:20,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 974 transitions, 26205 flow [2024-02-07 14:35:22,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 974 transitions, 25911 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-02-07 14:35:22,096 INFO L231 Difference]: Finished difference. Result has 337 places, 842 transitions, 24441 flow [2024-02-07 14:35:22,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=18781, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=465, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=24441, PETRI_PLACES=337, PETRI_TRANSITIONS=842} [2024-02-07 14:35:22,097 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 305 predicate places. [2024-02-07 14:35:22,097 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 842 transitions, 24441 flow [2024-02-07 14:35:22,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 11 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:22,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:22,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:22,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-02-07 14:35:22,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:35:22,310 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:22,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash -786585582, now seen corresponding path program 17 times [2024-02-07 14:35:22,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:22,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543308629] [2024-02-07 14:35:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:22,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:22,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:22,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543308629] [2024-02-07 14:35:22,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543308629] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:22,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:22,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:35:22,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486044448] [2024-02-07 14:35:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:22,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:35:22,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:35:22,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:35:22,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:35:22,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 842 transitions, 24441 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:22,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:22,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:35:22,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:25,058 INFO L124 PetriNetUnfolderBase]: 5515/8774 cut-off events. [2024-02-07 14:35:25,058 INFO L125 PetriNetUnfolderBase]: For 358010/358010 co-relation queries the response was YES. [2024-02-07 14:35:25,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95767 conditions, 8774 events. 5515/8774 cut-off events. For 358010/358010 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 55510 event pairs, 1517 based on Foata normal form. 32/8806 useless extension candidates. Maximal degree in co-relation 95630. Up to 7700 conditions per place. [2024-02-07 14:35:25,189 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 698 selfloop transitions, 169 changer transitions 7/875 dead transitions. [2024-02-07 14:35:25,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 875 transitions, 26463 flow [2024-02-07 14:35:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:35:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:35:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-02-07 14:35:25,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073891625615764 [2024-02-07 14:35:25,191 INFO L175 Difference]: Start difference. First operand has 337 places, 842 transitions, 24441 flow. Second operand 7 states and 103 transitions. [2024-02-07 14:35:25,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 875 transitions, 26463 flow [2024-02-07 14:35:27,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 875 transitions, 25903 flow, removed 132 selfloop flow, removed 4 redundant places. [2024-02-07 14:35:27,414 INFO L231 Difference]: Finished difference. Result has 341 places, 840 transitions, 24214 flow [2024-02-07 14:35:27,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23881, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=673, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24214, PETRI_PLACES=341, PETRI_TRANSITIONS=840} [2024-02-07 14:35:27,415 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 309 predicate places. [2024-02-07 14:35:27,415 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 840 transitions, 24214 flow [2024-02-07 14:35:27,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:27,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:27,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:27,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-02-07 14:35:27,416 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:27,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:27,416 INFO L85 PathProgramCache]: Analyzing trace with hash -702049288, now seen corresponding path program 18 times [2024-02-07 14:35:27,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:27,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092653672] [2024-02-07 14:35:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:27,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:27,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:27,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:27,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092653672] [2024-02-07 14:35:27,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092653672] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:27,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:27,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:35:27,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766621877] [2024-02-07 14:35:27,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:27,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:35:27,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:27,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:35:27,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:35:27,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:35:27,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 840 transitions, 24214 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:27,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:27,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:35:27,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:30,185 INFO L124 PetriNetUnfolderBase]: 5491/8727 cut-off events. [2024-02-07 14:35:30,186 INFO L125 PetriNetUnfolderBase]: For 354141/354141 co-relation queries the response was YES. [2024-02-07 14:35:30,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94274 conditions, 8727 events. 5491/8727 cut-off events. For 354141/354141 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 55066 event pairs, 1607 based on Foata normal form. 4/8731 useless extension candidates. Maximal degree in co-relation 94136. Up to 8093 conditions per place. [2024-02-07 14:35:30,307 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 713 selfloop transitions, 144 changer transitions 0/858 dead transitions. [2024-02-07 14:35:30,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 858 transitions, 26132 flow [2024-02-07 14:35:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:35:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:35:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-02-07 14:35:30,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-02-07 14:35:30,308 INFO L175 Difference]: Start difference. First operand has 341 places, 840 transitions, 24214 flow. Second operand 7 states and 87 transitions. [2024-02-07 14:35:30,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 858 transitions, 26132 flow [2024-02-07 14:35:32,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 858 transitions, 25781 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-02-07 14:35:32,225 INFO L231 Difference]: Finished difference. Result has 341 places, 841 transitions, 24193 flow [2024-02-07 14:35:32,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23873, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24193, PETRI_PLACES=341, PETRI_TRANSITIONS=841} [2024-02-07 14:35:32,226 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 309 predicate places. [2024-02-07 14:35:32,226 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 841 transitions, 24193 flow [2024-02-07 14:35:32,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:32,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:32,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:32,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-02-07 14:35:32,227 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:32,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1539422396, now seen corresponding path program 19 times [2024-02-07 14:35:32,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:32,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160543190] [2024-02-07 14:35:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:32,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:32,321 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 14:35:32,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:32,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160543190] [2024-02-07 14:35:32,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160543190] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:35:32,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736184924] [2024-02-07 14:35:32,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:35:32,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:35:32,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:35:32,323 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:35:32,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-02-07 14:35:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:32,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2024-02-07 14:35:32,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:35:32,483 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 14:35:32,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:35:32,621 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 14:35:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736184924] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:35:32,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:35:32,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 14:35:32,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953777802] [2024-02-07 14:35:32,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:35:32,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:35:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:35:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:35:32,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:35:32,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 841 transitions, 24193 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:32,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:32,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:35:32,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:35,538 INFO L124 PetriNetUnfolderBase]: 5532/8795 cut-off events. [2024-02-07 14:35:35,539 INFO L125 PetriNetUnfolderBase]: For 328612/328612 co-relation queries the response was YES. [2024-02-07 14:35:35,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92333 conditions, 8795 events. 5532/8795 cut-off events. For 328612/328612 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 55697 event pairs, 1535 based on Foata normal form. 20/8815 useless extension candidates. Maximal degree in co-relation 92196. Up to 7914 conditions per place. [2024-02-07 14:35:35,656 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 704 selfloop transitions, 185 changer transitions 0/890 dead transitions. [2024-02-07 14:35:35,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 890 transitions, 26454 flow [2024-02-07 14:35:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:35:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:35:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-02-07 14:35:35,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169278996865204 [2024-02-07 14:35:35,658 INFO L175 Difference]: Start difference. First operand has 341 places, 841 transitions, 24193 flow. Second operand 11 states and 133 transitions. [2024-02-07 14:35:35,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 890 transitions, 26454 flow [2024-02-07 14:35:37,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 890 transitions, 26166 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-02-07 14:35:37,528 INFO L231 Difference]: Finished difference. Result has 350 places, 853 transitions, 24615 flow [2024-02-07 14:35:37,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=23905, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=24615, PETRI_PLACES=350, PETRI_TRANSITIONS=853} [2024-02-07 14:35:37,529 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 318 predicate places. [2024-02-07 14:35:37,529 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 853 transitions, 24615 flow [2024-02-07 14:35:37,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:37,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:37,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:37,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-02-07 14:35:37,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-02-07 14:35:37,742 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:37,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:37,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1116936670, now seen corresponding path program 20 times [2024-02-07 14:35:37,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:37,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549764171] [2024-02-07 14:35:37,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:37,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:37,815 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 14:35:37,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549764171] [2024-02-07 14:35:37,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549764171] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:35:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454647539] [2024-02-07 14:35:37,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:35:37,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:35:37,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:35:37,817 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:35:37,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-02-07 14:35:37,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:35:37,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:35:37,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:35:37,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:35:37,972 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 14:35:37,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:35:38,107 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 14:35:38,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454647539] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:35:38,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:35:38,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 14:35:38,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416928396] [2024-02-07 14:35:38,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:35:38,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:35:38,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:35:38,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:35:38,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:35:38,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 853 transitions, 24615 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:38,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:38,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:35:38,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:40,678 INFO L124 PetriNetUnfolderBase]: 5520/8770 cut-off events. [2024-02-07 14:35:40,678 INFO L125 PetriNetUnfolderBase]: For 331453/331453 co-relation queries the response was YES. [2024-02-07 14:35:40,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93399 conditions, 8770 events. 5520/8770 cut-off events. For 331453/331453 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 55431 event pairs, 1517 based on Foata normal form. 10/8780 useless extension candidates. Maximal degree in co-relation 93258. Up to 7814 conditions per place. [2024-02-07 14:35:40,829 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 693 selfloop transitions, 186 changer transitions 0/880 dead transitions. [2024-02-07 14:35:40,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 880 transitions, 26572 flow [2024-02-07 14:35:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:35:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:35:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-02-07 14:35:40,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43103448275862066 [2024-02-07 14:35:40,830 INFO L175 Difference]: Start difference. First operand has 350 places, 853 transitions, 24615 flow. Second operand 8 states and 100 transitions. [2024-02-07 14:35:40,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 880 transitions, 26572 flow [2024-02-07 14:35:42,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 880 transitions, 26222 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-02-07 14:35:42,977 INFO L231 Difference]: Finished difference. Result has 352 places, 853 transitions, 24637 flow [2024-02-07 14:35:42,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24265, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=24637, PETRI_PLACES=352, PETRI_TRANSITIONS=853} [2024-02-07 14:35:42,978 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 320 predicate places. [2024-02-07 14:35:42,978 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 853 transitions, 24637 flow [2024-02-07 14:35:42,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:42,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:42,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:42,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-02-07 14:35:43,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-02-07 14:35:43,191 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:43,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1480489378, now seen corresponding path program 21 times [2024-02-07 14:35:43,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:43,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467236844] [2024-02-07 14:35:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:43,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:43,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:43,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467236844] [2024-02-07 14:35:43,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467236844] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:43,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:43,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:35:43,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007694276] [2024-02-07 14:35:43,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:43,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:35:43,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:43,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:35:43,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:35:43,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:35:43,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 853 transitions, 24637 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:43,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:43,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:35:43,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:45,931 INFO L124 PetriNetUnfolderBase]: 5538/8800 cut-off events. [2024-02-07 14:35:45,932 INFO L125 PetriNetUnfolderBase]: For 339108/339108 co-relation queries the response was YES. [2024-02-07 14:35:46,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93677 conditions, 8800 events. 5538/8800 cut-off events. For 339108/339108 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 55644 event pairs, 1600 based on Foata normal form. 4/8804 useless extension candidates. Maximal degree in co-relation 93536. Up to 8150 conditions per place. [2024-02-07 14:35:46,059 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 725 selfloop transitions, 150 changer transitions 0/876 dead transitions. [2024-02-07 14:35:46,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 876 transitions, 26711 flow [2024-02-07 14:35:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:35:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:35:46,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-02-07 14:35:46,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236453201970443 [2024-02-07 14:35:46,060 INFO L175 Difference]: Start difference. First operand has 352 places, 853 transitions, 24637 flow. Second operand 7 states and 86 transitions. [2024-02-07 14:35:46,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 876 transitions, 26711 flow [2024-02-07 14:35:48,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 876 transitions, 26317 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-02-07 14:35:48,061 INFO L231 Difference]: Finished difference. Result has 351 places, 857 transitions, 24697 flow [2024-02-07 14:35:48,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24249, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24697, PETRI_PLACES=351, PETRI_TRANSITIONS=857} [2024-02-07 14:35:48,062 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 319 predicate places. [2024-02-07 14:35:48,062 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 857 transitions, 24697 flow [2024-02-07 14:35:48,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:48,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:48,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:48,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-02-07 14:35:48,063 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:48,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:48,063 INFO L85 PathProgramCache]: Analyzing trace with hash -544320678, now seen corresponding path program 22 times [2024-02-07 14:35:48,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:48,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871715846] [2024-02-07 14:35:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:48,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:48,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:48,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871715846] [2024-02-07 14:35:48,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871715846] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:48,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:48,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:35:48,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676163900] [2024-02-07 14:35:48,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:48,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:35:48,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:48,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:35:48,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:35:48,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:35:48,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 857 transitions, 24697 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:48,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:48,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:35:48,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:51,099 INFO L124 PetriNetUnfolderBase]: 5571/8850 cut-off events. [2024-02-07 14:35:51,099 INFO L125 PetriNetUnfolderBase]: For 341077/341077 co-relation queries the response was YES. [2024-02-07 14:35:51,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94175 conditions, 8850 events. 5571/8850 cut-off events. For 341077/341077 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 55987 event pairs, 1587 based on Foata normal form. 20/8870 useless extension candidates. Maximal degree in co-relation 94036. Up to 8035 conditions per place. [2024-02-07 14:35:51,241 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 720 selfloop transitions, 175 changer transitions 0/896 dead transitions. [2024-02-07 14:35:51,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 896 transitions, 27143 flow [2024-02-07 14:35:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:35:51,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:35:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-02-07 14:35:51,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024630541871922 [2024-02-07 14:35:51,242 INFO L175 Difference]: Start difference. First operand has 351 places, 857 transitions, 24697 flow. Second operand 7 states and 102 transitions. [2024-02-07 14:35:51,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 896 transitions, 27143 flow [2024-02-07 14:35:53,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 896 transitions, 26823 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-02-07 14:35:53,434 INFO L231 Difference]: Finished difference. Result has 354 places, 871 transitions, 25242 flow [2024-02-07 14:35:53,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24393, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=25242, PETRI_PLACES=354, PETRI_TRANSITIONS=871} [2024-02-07 14:35:53,435 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 322 predicate places. [2024-02-07 14:35:53,435 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 871 transitions, 25242 flow [2024-02-07 14:35:53,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:53,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:53,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:53,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-02-07 14:35:53,435 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:53,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:53,436 INFO L85 PathProgramCache]: Analyzing trace with hash 183748992, now seen corresponding path program 23 times [2024-02-07 14:35:53,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:53,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117907422] [2024-02-07 14:35:53,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:53,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:35:53,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:53,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117907422] [2024-02-07 14:35:53,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117907422] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:35:53,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:35:53,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:35:53,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830861643] [2024-02-07 14:35:53,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:35:53,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:35:53,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:53,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:35:53,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:35:53,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:35:53,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 871 transitions, 25242 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:53,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:53,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:35:53,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:35:56,491 INFO L124 PetriNetUnfolderBase]: 5583/8861 cut-off events. [2024-02-07 14:35:56,491 INFO L125 PetriNetUnfolderBase]: For 344385/344385 co-relation queries the response was YES. [2024-02-07 14:35:56,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94911 conditions, 8861 events. 5583/8861 cut-off events. For 344385/344385 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 56049 event pairs, 1601 based on Foata normal form. 4/8865 useless extension candidates. Maximal degree in co-relation 94770. Up to 8181 conditions per place. [2024-02-07 14:35:56,604 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 731 selfloop transitions, 160 changer transitions 0/892 dead transitions. [2024-02-07 14:35:56,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 892 transitions, 27297 flow [2024-02-07 14:35:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:35:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:35:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2024-02-07 14:35:56,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-02-07 14:35:56,605 INFO L175 Difference]: Start difference. First operand has 354 places, 871 transitions, 25242 flow. Second operand 7 states and 98 transitions. [2024-02-07 14:35:56,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 892 transitions, 27297 flow [2024-02-07 14:35:58,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 892 transitions, 27017 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-02-07 14:35:58,699 INFO L231 Difference]: Finished difference. Result has 356 places, 873 transitions, 25347 flow [2024-02-07 14:35:58,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=24930, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=25347, PETRI_PLACES=356, PETRI_TRANSITIONS=873} [2024-02-07 14:35:58,700 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 324 predicate places. [2024-02-07 14:35:58,700 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 873 transitions, 25347 flow [2024-02-07 14:35:58,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:35:58,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:35:58,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:35:58,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-02-07 14:35:58,701 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:35:58,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:35:58,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1343918397, now seen corresponding path program 28 times [2024-02-07 14:35:58,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:35:58,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463352657] [2024-02-07 14:35:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:35:58,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:35:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:35:58,780 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 14:35:58,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:35:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463352657] [2024-02-07 14:35:58,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463352657] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:35:58,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340274872] [2024-02-07 14:35:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:35:58,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:35:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:35:58,782 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:35:58,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-02-07 14:35:58,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:35:58,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:35:58,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:35:58,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:35:58,997 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 14:35:58,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:35:59,062 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 14:35:59,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340274872] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:35:59,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:35:59,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 6] total 12 [2024-02-07 14:35:59,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997317732] [2024-02-07 14:35:59,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:35:59,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 14:35:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:35:59,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 14:35:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-02-07 14:35:59,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:35:59,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 873 transitions, 25347 flow. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:35:59,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:35:59,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:35:59,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:01,978 INFO L124 PetriNetUnfolderBase]: 5602/8845 cut-off events. [2024-02-07 14:36:01,979 INFO L125 PetriNetUnfolderBase]: For 332853/332853 co-relation queries the response was YES. [2024-02-07 14:36:02,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95011 conditions, 8845 events. 5602/8845 cut-off events. For 332853/332853 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 55522 event pairs, 1115 based on Foata normal form. 16/8861 useless extension candidates. Maximal degree in co-relation 94870. Up to 6188 conditions per place. [2024-02-07 14:36:02,116 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 483 selfloop transitions, 493 changer transitions 0/977 dead transitions. [2024-02-07 14:36:02,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 977 transitions, 28941 flow [2024-02-07 14:36:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-02-07 14:36:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-02-07 14:36:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 193 transitions. [2024-02-07 14:36:02,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753694581280788 [2024-02-07 14:36:02,118 INFO L175 Difference]: Start difference. First operand has 356 places, 873 transitions, 25347 flow. Second operand 14 states and 193 transitions. [2024-02-07 14:36:02,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 977 transitions, 28941 flow [2024-02-07 14:36:04,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 977 transitions, 28737 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:36:04,539 INFO L231 Difference]: Finished difference. Result has 371 places, 891 transitions, 26858 flow [2024-02-07 14:36:04,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=25143, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=26858, PETRI_PLACES=371, PETRI_TRANSITIONS=891} [2024-02-07 14:36:04,540 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 339 predicate places. [2024-02-07 14:36:04,540 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 891 transitions, 26858 flow [2024-02-07 14:36:04,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:04,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:04,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:04,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-02-07 14:36:04,752 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:36:04,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1320686877, now seen corresponding path program 29 times [2024-02-07 14:36:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:04,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819734428] [2024-02-07 14:36:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:04,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:04,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819734428] [2024-02-07 14:36:04,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819734428] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:04,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:36:04,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:36:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366266699] [2024-02-07 14:36:04,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:04,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:36:04,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:04,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:36:04,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:36:04,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:36:04,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 891 transitions, 26858 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:36:04,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:04,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:36:04,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:08,106 INFO L124 PetriNetUnfolderBase]: 5591/8821 cut-off events. [2024-02-07 14:36:08,106 INFO L125 PetriNetUnfolderBase]: For 360776/360776 co-relation queries the response was YES. [2024-02-07 14:36:08,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97371 conditions, 8821 events. 5591/8821 cut-off events. For 360776/360776 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 55308 event pairs, 1567 based on Foata normal form. 6/8827 useless extension candidates. Maximal degree in co-relation 97224. Up to 8115 conditions per place. [2024-02-07 14:36:08,240 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 745 selfloop transitions, 168 changer transitions 0/914 dead transitions. [2024-02-07 14:36:08,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 914 transitions, 28927 flow [2024-02-07 14:36:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:36:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:36:08,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 102 transitions. [2024-02-07 14:36:08,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024630541871922 [2024-02-07 14:36:08,241 INFO L175 Difference]: Start difference. First operand has 371 places, 891 transitions, 26858 flow. Second operand 7 states and 102 transitions. [2024-02-07 14:36:08,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 914 transitions, 28927 flow [2024-02-07 14:36:10,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 914 transitions, 28443 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-02-07 14:36:10,620 INFO L231 Difference]: Finished difference. Result has 374 places, 891 transitions, 26745 flow [2024-02-07 14:36:10,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=26339, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26745, PETRI_PLACES=374, PETRI_TRANSITIONS=891} [2024-02-07 14:36:10,621 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 342 predicate places. [2024-02-07 14:36:10,621 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 891 transitions, 26745 flow [2024-02-07 14:36:10,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:36:10,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:10,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:10,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-02-07 14:36:10,622 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:36:10,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:10,622 INFO L85 PathProgramCache]: Analyzing trace with hash -234735387, now seen corresponding path program 7 times [2024-02-07 14:36:10,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:10,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264471772] [2024-02-07 14:36:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:10,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:10,704 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 14:36:10,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:10,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264471772] [2024-02-07 14:36:10,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264471772] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:10,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209696637] [2024-02-07 14:36:10,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 14:36:10,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:10,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:10,706 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:10,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-02-07 14:36:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:10,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2024-02-07 14:36:10,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:10,866 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 14:36:10,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:36:10,958 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 14:36:10,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209696637] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:36:10,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:36:10,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 14:36:10,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896258142] [2024-02-07 14:36:10,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:36:10,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:36:10,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:10,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:36:10,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:36:10,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:36:10,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 891 transitions, 26745 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 14:36:10,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:10,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:36:10,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:13,845 INFO L124 PetriNetUnfolderBase]: 6197/9703 cut-off events. [2024-02-07 14:36:13,845 INFO L125 PetriNetUnfolderBase]: For 390884/390884 co-relation queries the response was YES. [2024-02-07 14:36:13,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106657 conditions, 9703 events. 6197/9703 cut-off events. For 390884/390884 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 61047 event pairs, 1347 based on Foata normal form. 12/9715 useless extension candidates. Maximal degree in co-relation 106507. Up to 5488 conditions per place. [2024-02-07 14:36:13,990 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 613 selfloop transitions, 404 changer transitions 0/1018 dead transitions. [2024-02-07 14:36:13,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1018 transitions, 31079 flow [2024-02-07 14:36:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:36:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:36:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 184 transitions. [2024-02-07 14:36:13,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42298850574712643 [2024-02-07 14:36:13,991 INFO L175 Difference]: Start difference. First operand has 374 places, 891 transitions, 26745 flow. Second operand 15 states and 184 transitions. [2024-02-07 14:36:13,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1018 transitions, 31079 flow [2024-02-07 14:36:16,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1018 transitions, 30688 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-02-07 14:36:16,770 INFO L231 Difference]: Finished difference. Result has 392 places, 932 transitions, 29062 flow [2024-02-07 14:36:16,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=26392, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=29062, PETRI_PLACES=392, PETRI_TRANSITIONS=932} [2024-02-07 14:36:16,771 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 360 predicate places. [2024-02-07 14:36:16,771 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 932 transitions, 29062 flow [2024-02-07 14:36:16,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 14:36:16,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:16,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:16,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:16,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:16,983 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:36:16,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:16,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2056972827, now seen corresponding path program 30 times [2024-02-07 14:36:16,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:16,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706245048] [2024-02-07 14:36:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:16,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:17,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:17,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706245048] [2024-02-07 14:36:17,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706245048] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:17,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:36:17,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:36:17,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835865427] [2024-02-07 14:36:17,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:17,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:36:17,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:36:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:36:17,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:36:17,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 932 transitions, 29062 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:17,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:17,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:36:17,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:20,114 INFO L124 PetriNetUnfolderBase]: 6194/9702 cut-off events. [2024-02-07 14:36:20,114 INFO L125 PetriNetUnfolderBase]: For 433783/433783 co-relation queries the response was YES. [2024-02-07 14:36:20,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110481 conditions, 9702 events. 6194/9702 cut-off events. For 433783/433783 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 61105 event pairs, 1752 based on Foata normal form. 8/9710 useless extension candidates. Maximal degree in co-relation 110324. Up to 8884 conditions per place. [2024-02-07 14:36:20,263 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 777 selfloop transitions, 177 changer transitions 0/955 dead transitions. [2024-02-07 14:36:20,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 955 transitions, 31241 flow [2024-02-07 14:36:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:36:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:36:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-02-07 14:36:20,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2024-02-07 14:36:20,264 INFO L175 Difference]: Start difference. First operand has 392 places, 932 transitions, 29062 flow. Second operand 7 states and 91 transitions. [2024-02-07 14:36:20,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 955 transitions, 31241 flow [2024-02-07 14:36:23,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 955 transitions, 31114 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-02-07 14:36:23,250 INFO L231 Difference]: Finished difference. Result has 396 places, 934 transitions, 29365 flow [2024-02-07 14:36:23,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=28935, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29365, PETRI_PLACES=396, PETRI_TRANSITIONS=934} [2024-02-07 14:36:23,251 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 364 predicate places. [2024-02-07 14:36:23,251 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 934 transitions, 29365 flow [2024-02-07 14:36:23,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:23,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:23,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:23,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-02-07 14:36:23,252 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:36:23,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2110828617, now seen corresponding path program 31 times [2024-02-07 14:36:23,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:23,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306088094] [2024-02-07 14:36:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:23,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:23,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:23,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306088094] [2024-02-07 14:36:23,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306088094] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:23,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:36:23,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:36:23,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94122949] [2024-02-07 14:36:23,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:23,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:36:23,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:36:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:36:23,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:36:23,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 934 transitions, 29365 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:36:23,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:23,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:36:23,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:27,195 INFO L124 PetriNetUnfolderBase]: 6172/9647 cut-off events. [2024-02-07 14:36:27,196 INFO L125 PetriNetUnfolderBase]: For 437261/437261 co-relation queries the response was YES. [2024-02-07 14:36:27,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110528 conditions, 9647 events. 6172/9647 cut-off events. For 437261/437261 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 60527 event pairs, 1730 based on Foata normal form. 16/9663 useless extension candidates. Maximal degree in co-relation 110369. Up to 8808 conditions per place. [2024-02-07 14:36:27,333 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 769 selfloop transitions, 187 changer transitions 0/957 dead transitions. [2024-02-07 14:36:27,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 957 transitions, 31483 flow [2024-02-07 14:36:27,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:36:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:36:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-02-07 14:36:27,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123152709359606 [2024-02-07 14:36:27,334 INFO L175 Difference]: Start difference. First operand has 396 places, 934 transitions, 29365 flow. Second operand 7 states and 104 transitions. [2024-02-07 14:36:27,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 957 transitions, 31483 flow [2024-02-07 14:36:30,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 957 transitions, 31120 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-02-07 14:36:30,134 INFO L231 Difference]: Finished difference. Result has 398 places, 932 transitions, 29347 flow [2024-02-07 14:36:30,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=28963, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=29347, PETRI_PLACES=398, PETRI_TRANSITIONS=932} [2024-02-07 14:36:30,135 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 366 predicate places. [2024-02-07 14:36:30,136 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 932 transitions, 29347 flow [2024-02-07 14:36:30,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:36:30,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:30,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:30,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-02-07 14:36:30,136 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:36:30,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:30,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2069342555, now seen corresponding path program 32 times [2024-02-07 14:36:30,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:30,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014528826] [2024-02-07 14:36:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:30,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:30,215 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 14:36:30,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014528826] [2024-02-07 14:36:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014528826] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075858748] [2024-02-07 14:36:30,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 14:36:30,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:30,216 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:30,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-02-07 14:36:30,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:36:30,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:36:30,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:36:30,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:30,406 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 14:36:30,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:36:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:30,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075858748] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:30,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:36:30,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 9] total 14 [2024-02-07 14:36:30,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344094368] [2024-02-07 14:36:30,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:30,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:36:30,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:30,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:36:30,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:36:30,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:36:30,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 932 transitions, 29347 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:36:30,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:30,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:36:30,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:34,266 INFO L124 PetriNetUnfolderBase]: 6464/10363 cut-off events. [2024-02-07 14:36:34,266 INFO L125 PetriNetUnfolderBase]: For 455311/455311 co-relation queries the response was YES. [2024-02-07 14:36:34,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117433 conditions, 10363 events. 6464/10363 cut-off events. For 455311/455311 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 68473 event pairs, 905 based on Foata normal form. 16/10379 useless extension candidates. Maximal degree in co-relation 117273. Up to 3794 conditions per place. [2024-02-07 14:36:34,550 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 464 selfloop transitions, 651 changer transitions 2/1118 dead transitions. [2024-02-07 14:36:34,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1118 transitions, 36568 flow [2024-02-07 14:36:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:36:34,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:36:34,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-02-07 14:36:34,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960591133004927 [2024-02-07 14:36:34,551 INFO L175 Difference]: Start difference. First operand has 398 places, 932 transitions, 29347 flow. Second operand 7 states and 121 transitions. [2024-02-07 14:36:34,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1118 transitions, 36568 flow [2024-02-07 14:36:37,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1118 transitions, 36132 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-02-07 14:36:37,928 INFO L231 Difference]: Finished difference. Result has 404 places, 1006 transitions, 33851 flow [2024-02-07 14:36:37,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=28963, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=33851, PETRI_PLACES=404, PETRI_TRANSITIONS=1006} [2024-02-07 14:36:37,929 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 372 predicate places. [2024-02-07 14:36:37,930 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 1006 transitions, 33851 flow [2024-02-07 14:36:37,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:36:37,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:37,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:37,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:38,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:38,141 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:36:38,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:38,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1310543253, now seen corresponding path program 33 times [2024-02-07 14:36:38,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:38,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022128294] [2024-02-07 14:36:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:38,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:38,218 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 14:36:38,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:38,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022128294] [2024-02-07 14:36:38,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022128294] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:38,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555095714] [2024-02-07 14:36:38,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 14:36:38,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:38,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:38,220 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:38,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-02-07 14:36:38,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 14:36:38,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:36:38,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:36:38,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:38,402 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 14:36:38,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:36:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:38,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555095714] provided 1 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:38,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-02-07 14:36:38,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 9] total 14 [2024-02-07 14:36:38,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323068567] [2024-02-07 14:36:38,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:38,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:36:38,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:38,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:36:38,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:36:38,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:36:38,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1006 transitions, 33851 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:38,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:38,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:36:38,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:42,533 INFO L124 PetriNetUnfolderBase]: 6466/10417 cut-off events. [2024-02-07 14:36:42,534 INFO L125 PetriNetUnfolderBase]: For 527054/527054 co-relation queries the response was YES. [2024-02-07 14:36:42,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125033 conditions, 10417 events. 6466/10417 cut-off events. For 527054/527054 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 69304 event pairs, 834 based on Foata normal form. 16/10433 useless extension candidates. Maximal degree in co-relation 124868. Up to 3846 conditions per place. [2024-02-07 14:36:42,687 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 491 selfloop transitions, 648 changer transitions 2/1142 dead transitions. [2024-02-07 14:36:42,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1142 transitions, 39624 flow [2024-02-07 14:36:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:36:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:36:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-02-07 14:36:42,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615763546798029 [2024-02-07 14:36:42,688 INFO L175 Difference]: Start difference. First operand has 404 places, 1006 transitions, 33851 flow. Second operand 7 states and 114 transitions. [2024-02-07 14:36:42,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1142 transitions, 39624 flow [2024-02-07 14:36:46,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 1142 transitions, 39434 flow, removed 81 selfloop flow, removed 1 redundant places. [2024-02-07 14:36:46,656 INFO L231 Difference]: Finished difference. Result has 413 places, 1030 transitions, 36776 flow [2024-02-07 14:36:46,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=33681, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=626, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36776, PETRI_PLACES=413, PETRI_TRANSITIONS=1030} [2024-02-07 14:36:46,657 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 381 predicate places. [2024-02-07 14:36:46,657 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 1030 transitions, 36776 flow [2024-02-07 14:36:46,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 14:36:46,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:46,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:46,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-02-07 14:36:46,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-02-07 14:36:46,869 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:36:46,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1752210773, now seen corresponding path program 34 times [2024-02-07 14:36:46,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:46,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69212194] [2024-02-07 14:36:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:46,988 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 14:36:46,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:46,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69212194] [2024-02-07 14:36:46,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69212194] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:36:46,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40929087] [2024-02-07 14:36:46,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 14:36:46,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:46,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:36:46,990 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:36:46,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-02-07 14:36:47,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 14:36:47,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:36:47,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 14:36:47,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:36:47,148 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 14:36:47,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:36:47,371 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 14:36:47,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40929087] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:36:47,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:36:47,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 14:36:47,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146546977] [2024-02-07 14:36:47,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:36:47,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:36:47,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:36:47,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:36:47,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 14:36:47,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 1030 transitions, 36776 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 14:36:47,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:47,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 14:36:47,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:36:51,874 INFO L124 PetriNetUnfolderBase]: 6664/10855 cut-off events. [2024-02-07 14:36:51,874 INFO L125 PetriNetUnfolderBase]: For 617778/617778 co-relation queries the response was YES. [2024-02-07 14:36:51,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132780 conditions, 10855 events. 6664/10855 cut-off events. For 617778/617778 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 74021 event pairs, 1098 based on Foata normal form. 22/10877 useless extension candidates. Maximal degree in co-relation 132612. Up to 4318 conditions per place. [2024-02-07 14:36:52,038 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 510 selfloop transitions, 669 changer transitions 0/1180 dead transitions. [2024-02-07 14:36:52,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1180 transitions, 42161 flow [2024-02-07 14:36:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:36:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:36:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 171 transitions. [2024-02-07 14:36:52,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49137931034482757 [2024-02-07 14:36:52,047 INFO L175 Difference]: Start difference. First operand has 413 places, 1030 transitions, 36776 flow. Second operand 12 states and 171 transitions. [2024-02-07 14:36:52,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1180 transitions, 42161 flow [2024-02-07 14:36:56,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1180 transitions, 41539 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-02-07 14:36:56,179 INFO L231 Difference]: Finished difference. Result has 424 places, 1045 transitions, 38693 flow [2024-02-07 14:36:56,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=36209, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=654, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=38693, PETRI_PLACES=424, PETRI_TRANSITIONS=1045} [2024-02-07 14:36:56,180 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 392 predicate places. [2024-02-07 14:36:56,180 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1045 transitions, 38693 flow [2024-02-07 14:36:56,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 14:36:56,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:36:56,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:36:56,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-02-07 14:36:56,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:36:56,391 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:36:56,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:36:56,392 INFO L85 PathProgramCache]: Analyzing trace with hash -402879352, now seen corresponding path program 24 times [2024-02-07 14:36:56,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:36:56,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80851276] [2024-02-07 14:36:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:36:56,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:36:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:36:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:36:56,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:36:56,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80851276] [2024-02-07 14:36:56,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80851276] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:36:56,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:36:56,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:36:56,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284633198] [2024-02-07 14:36:56,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:36:56,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:36:56,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:36:56,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:36:56,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:36:56,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:36:56,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1045 transitions, 38693 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:36:56,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:36:56,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:36:56,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:37:00,898 INFO L124 PetriNetUnfolderBase]: 6659/10906 cut-off events. [2024-02-07 14:37:00,899 INFO L125 PetriNetUnfolderBase]: For 628635/628635 co-relation queries the response was YES. [2024-02-07 14:37:01,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136121 conditions, 10906 events. 6659/10906 cut-off events. For 628635/628635 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 74853 event pairs, 1580 based on Foata normal form. 32/10938 useless extension candidates. Maximal degree in co-relation 135951. Up to 7809 conditions per place. [2024-02-07 14:37:01,072 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 696 selfloop transitions, 417 changer transitions 6/1120 dead transitions. [2024-02-07 14:37:01,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1120 transitions, 42536 flow [2024-02-07 14:37:01,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:37:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:37:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-02-07 14:37:01,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073891625615764 [2024-02-07 14:37:01,074 INFO L175 Difference]: Start difference. First operand has 424 places, 1045 transitions, 38693 flow. Second operand 7 states and 103 transitions. [2024-02-07 14:37:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1120 transitions, 42536 flow [2024-02-07 14:37:05,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 1120 transitions, 41223 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-02-07 14:37:05,795 INFO L231 Difference]: Finished difference. Result has 424 places, 1060 transitions, 38889 flow [2024-02-07 14:37:05,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=37280, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=38889, PETRI_PLACES=424, PETRI_TRANSITIONS=1060} [2024-02-07 14:37:05,796 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 392 predicate places. [2024-02-07 14:37:05,796 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1060 transitions, 38889 flow [2024-02-07 14:37:05,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:37:05,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:37:05,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:37:05,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-02-07 14:37:05,797 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:37:05,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:37:05,797 INFO L85 PathProgramCache]: Analyzing trace with hash -320149108, now seen corresponding path program 25 times [2024-02-07 14:37:05,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:37:05,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889579063] [2024-02-07 14:37:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:37:05,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:37:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:37:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:37:05,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:37:05,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889579063] [2024-02-07 14:37:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889579063] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:37:05,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:37:05,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:37:05,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047965225] [2024-02-07 14:37:05,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:37:05,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:37:05,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:37:05,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:37:05,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:37:05,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:37:05,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1060 transitions, 38889 flow. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:37:05,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:37:05,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:37:05,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:37:10,474 INFO L124 PetriNetUnfolderBase]: 6662/10939 cut-off events. [2024-02-07 14:37:10,475 INFO L125 PetriNetUnfolderBase]: For 612307/612307 co-relation queries the response was YES. [2024-02-07 14:37:10,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136628 conditions, 10939 events. 6662/10939 cut-off events. For 612307/612307 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 75414 event pairs, 1092 based on Foata normal form. 20/10959 useless extension candidates. Maximal degree in co-relation 136457. Up to 4504 conditions per place. [2024-02-07 14:37:10,657 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 742 selfloop transitions, 414 changer transitions 11/1168 dead transitions. [2024-02-07 14:37:10,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1168 transitions, 43582 flow [2024-02-07 14:37:10,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-02-07 14:37:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-02-07 14:37:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-02-07 14:37:10,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5123152709359606 [2024-02-07 14:37:10,658 INFO L175 Difference]: Start difference. First operand has 424 places, 1060 transitions, 38889 flow. Second operand 7 states and 104 transitions. [2024-02-07 14:37:10,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1168 transitions, 43582 flow [2024-02-07 14:37:15,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 1168 transitions, 43044 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-02-07 14:37:15,736 INFO L231 Difference]: Finished difference. Result has 431 places, 1065 transitions, 39521 flow [2024-02-07 14:37:15,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=38357, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=39521, PETRI_PLACES=431, PETRI_TRANSITIONS=1065} [2024-02-07 14:37:15,737 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 399 predicate places. [2024-02-07 14:37:15,737 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1065 transitions, 39521 flow [2024-02-07 14:37:15,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:37:15,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:37:15,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:37:15,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-02-07 14:37:15,737 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 14:37:15,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:37:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1828395979, now seen corresponding path program 35 times [2024-02-07 14:37:15,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:37:15,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814630054] [2024-02-07 14:37:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:37:15,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:37:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:37:15,820 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 14:37:15,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:37:15,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814630054] [2024-02-07 14:37:15,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814630054] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 14:37:15,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707136492] [2024-02-07 14:37:15,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 14:37:15,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 14:37:15,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:37:15,821 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 14:37:15,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-02-07 14:37:15,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 14:37:15,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 14:37:15,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2024-02-07 14:37:15,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 14:37:16,051 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 14:37:16,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 14:37:16,151 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 14:37:16,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707136492] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 14:37:16,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 14:37:16,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2024-02-07 14:37:16,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931753232] [2024-02-07 14:37:16,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 14:37:16,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 14:37:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:37:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 14:37:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-02-07 14:37:16,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 14:37:16,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1065 transitions, 39521 flow. Second operand has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 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 14:37:16,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:37:16,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 14:37:16,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand