./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/unroll-cond-3.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/unroll-cond-3.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/unroll-cond-3.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-?-80b1b13-m [2024-01-31 17:23:17,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:23:17,386 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:23:17,392 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:23:17,392 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:23:17,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:23:17,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:23:17,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:23:17,430 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:23:17,435 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:23:17,435 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:23:17,436 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:23:17,437 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:23:17,438 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:23:17,438 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:23:17,439 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:23:17,439 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:23:17,439 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:23:17,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:23:17,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:23:17,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:23:17,440 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:23:17,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:23:17,441 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:23:17,441 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:23:17,441 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:23:17,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:23:17,442 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:23:17,442 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:23:17,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:23:17,444 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:23:17,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:23:17,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:23:17,444 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:23:17,444 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:23:17,445 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:23:17,445 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:23:17,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:23:17,445 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:23:17,445 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:23:17,446 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:23:17,446 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:23:17,446 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:23:17,446 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:23:17,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:23:17,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:23:17,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:23:17,725 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:23:17,725 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:23:17,726 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2024-01-31 17:23:18,858 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:23:19,042 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:23:19,043 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-3.wvr.c [2024-01-31 17:23:19,051 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d53c07f89/11e5039c55724a39a6cd842784479af6/FLAGb92a97d63 [2024-01-31 17:23:19,063 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d53c07f89/11e5039c55724a39a6cd842784479af6 [2024-01-31 17:23:19,065 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:23:19,065 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:23:19,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/unroll-cond-3.wvr.yml/witness.yml [2024-01-31 17:23:19,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:23:19,192 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:23:19,194 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:23:19,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:23:19,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:23:19,199 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:23:19" (1/2) ... [2024-01-31 17:23:19,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527fac13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:23:19, skipping insertion in model container [2024-01-31 17:23:19,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:23:19" (1/2) ... [2024-01-31 17:23:19,202 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@18392543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:23:19, skipping insertion in model container [2024-01-31 17:23:19,202 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:23:19" (2/2) ... [2024-01-31 17:23:19,202 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@527fac13 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19, skipping insertion in model container [2024-01-31 17:23:19,202 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:23:19" (2/2) ... [2024-01-31 17:23:19,203 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:23:19,244 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:23:19,246 INFO L98 nessWitnessExtractor]: Location invariant after [L48-L48] (unsigned long )_argptr == 0UL [2024-01-31 17:23:19,246 INFO L98 nessWitnessExtractor]: Location invariant after [L58-L58] (unsigned long )_argptr == 0UL [2024-01-31 17:23:19,264 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:23:19,455 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/unroll-cond-3.wvr.c[2667,2680] [2024-01-31 17:23:19,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:23:19,481 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:23:19,496 WARN L424 MainDispatcher]: Unable to annotate unsigned int with a witness entry [2024-01-31 17:23:19,500 WARN L424 MainDispatcher]: Unable to annotate unsigned int with a witness entry [2024-01-31 17:23:19,520 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/unroll-cond-3.wvr.c[2667,2680] [2024-01-31 17:23:19,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:23:19,542 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:23:19,543 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19 WrapperNode [2024-01-31 17:23:19,543 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:23:19,545 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:23:19,545 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:23:19,545 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:23:19,551 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 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,631 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 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,674 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 167 [2024-01-31 17:23:19,675 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:23:19,676 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:23:19,676 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:23:19,676 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:23:19,685 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,691 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,705 INFO L175 MemorySlicer]: Split 13 memory accesses to 4 slices as follows [2, 2, 2, 7]. 54 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]. [2024-01-31 17:23:19,706 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,706 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,712 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,718 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,720 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:23:19,721 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:23:19,721 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:23:19,721 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:23:19,730 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (1/1) ... [2024-01-31 17:23:19,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:23:19,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:19,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-31 17:23:19,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-31 17:23:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:23:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:23:19,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:23:19,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:23:19,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:23:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:23:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:23:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:23:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:23:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:23:19,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:23:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:23:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:23:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:23:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:23:19,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:23:19,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:23:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:23:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:23:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:23:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:23:19,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:23:19,793 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:23:19,886 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:23:19,887 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:23:20,135 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:23:20,135 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:23:20,405 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:23:20,405 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:23:20,408 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:23:20 BoogieIcfgContainer [2024-01-31 17:23:20,408 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:23:20,411 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:23:20,411 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:23:20,414 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:23:20,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:23:19" (1/4) ... [2024-01-31 17:23:20,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a26dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:23:20, skipping insertion in model container [2024-01-31 17:23:20,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:23:19" (2/4) ... [2024-01-31 17:23:20,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a26dbc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:23:20, skipping insertion in model container [2024-01-31 17:23:20,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:23:19" (3/4) ... [2024-01-31 17:23:20,417 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a26dbc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:23:20, skipping insertion in model container [2024-01-31 17:23:20,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:23:20" (4/4) ... [2024-01-31 17:23:20,418 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-01-31 17:23:20,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:23:20,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:23:20,433 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:23:20,487 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:23:20,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-31 17:23:20,542 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-31 17:23:20,542 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:23:20,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-31 17:23:20,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-31 17:23:20,547 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-31 17:23:20,554 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:23:20,560 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;@40273cf8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:23:20,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:23:20,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:23:20,569 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-31 17:23:20,570 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:23:20,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:20,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:20,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:20,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash -953264648, now seen corresponding path program 1 times [2024-01-31 17:23:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:20,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781033182] [2024-01-31 17:23:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:20,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:21,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:21,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781033182] [2024-01-31 17:23:21,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781033182] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:23:21,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:23:21,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:23:21,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174904280] [2024-01-31 17:23:21,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:23:21,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:23:21,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:23:21,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:23:21,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:21,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:21,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:21,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:21,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:21,133 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2024-01-31 17:23:21,133 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-31 17:23:21,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 77 events. 41/77 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 132 event pairs, 24 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2024-01-31 17:23:21,138 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 16 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2024-01-31 17:23:21,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 86 flow [2024-01-31 17:23:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:23:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:23:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2024-01-31 17:23:21,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-31 17:23:21,152 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 28 transitions. [2024-01-31 17:23:21,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 86 flow [2024-01-31 17:23:21,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:23:21,157 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2024-01-31 17:23:21,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2024-01-31 17:23:21,162 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-01-31 17:23:21,162 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2024-01-31 17:23:21,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:21,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:21,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:21,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:23:21,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:21,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1689825126, now seen corresponding path program 1 times [2024-01-31 17:23:21,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:21,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121450545] [2024-01-31 17:23:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:21,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:21,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:21,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121450545] [2024-01-31 17:23:21,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121450545] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:23:21,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:23:21,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:23:21,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190010274] [2024-01-31 17:23:21,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:23:21,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:23:21,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:21,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:23:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:23:21,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:21,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:21,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:21,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:21,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:21,899 INFO L124 PetriNetUnfolderBase]: 75/133 cut-off events. [2024-01-31 17:23:21,900 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:23:21,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 133 events. 75/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 342 event pairs, 1 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 269. Up to 89 conditions per place. [2024-01-31 17:23:21,903 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 33 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2024-01-31 17:23:21,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 46 transitions, 201 flow [2024-01-31 17:23:21,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:23:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:23:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2024-01-31 17:23:21,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-31 17:23:21,910 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 6 states and 63 transitions. [2024-01-31 17:23:21,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 46 transitions, 201 flow [2024-01-31 17:23:21,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 46 transitions, 197 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 17:23:21,914 INFO L231 Difference]: Finished difference. Result has 28 places, 30 transitions, 119 flow [2024-01-31 17:23:21,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=28, PETRI_TRANSITIONS=30} [2024-01-31 17:23:21,919 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-01-31 17:23:21,920 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 30 transitions, 119 flow [2024-01-31 17:23:21,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:21,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:21,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:21,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:23:21,921 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:21,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1465931414, now seen corresponding path program 2 times [2024-01-31 17:23:21,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:21,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414751121] [2024-01-31 17:23:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:22,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:22,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:22,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414751121] [2024-01-31 17:23:22,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414751121] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:23:22,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:23:22,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:23:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548134907] [2024-01-31 17:23:22,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:23:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:23:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:23:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:23:22,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:22,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 30 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:22,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:22,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:22,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:22,418 INFO L124 PetriNetUnfolderBase]: 85/149 cut-off events. [2024-01-31 17:23:22,419 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-01-31 17:23:22,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 149 events. 85/149 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 377 event pairs, 10 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 445. Up to 99 conditions per place. [2024-01-31 17:23:22,422 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 32 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2024-01-31 17:23:22,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 294 flow [2024-01-31 17:23:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:23:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:23:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-01-31 17:23:22,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-01-31 17:23:22,426 INFO L175 Difference]: Start difference. First operand has 28 places, 30 transitions, 119 flow. Second operand 6 states and 62 transitions. [2024-01-31 17:23:22,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 51 transitions, 294 flow [2024-01-31 17:23:22,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 51 transitions, 286 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-01-31 17:23:22,430 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 214 flow [2024-01-31 17:23:22,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2024-01-31 17:23:22,432 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-01-31 17:23:22,432 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 214 flow [2024-01-31 17:23:22,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:22,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:22,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:22,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:23:22,433 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:22,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:22,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1638502336, now seen corresponding path program 3 times [2024-01-31 17:23:22,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:22,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016205687] [2024-01-31 17:23:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:22,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:22,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:22,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016205687] [2024-01-31 17:23:22,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016205687] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:23:22,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:23:22,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:23:22,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958779879] [2024-01-31 17:23:22,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:23:22,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:23:22,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:23:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:23:22,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:22,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:22,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:22,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:22,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:22,829 INFO L124 PetriNetUnfolderBase]: 86/164 cut-off events. [2024-01-31 17:23:22,829 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-01-31 17:23:22,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 164 events. 86/164 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 465 event pairs, 1 based on Foata normal form. 1/136 useless extension candidates. Maximal degree in co-relation 574. Up to 95 conditions per place. [2024-01-31 17:23:22,835 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 37 selfloop transitions, 19 changer transitions 2/59 dead transitions. [2024-01-31 17:23:22,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 395 flow [2024-01-31 17:23:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:23:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:23:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2024-01-31 17:23:22,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-01-31 17:23:22,837 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 214 flow. Second operand 6 states and 68 transitions. [2024-01-31 17:23:22,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 395 flow [2024-01-31 17:23:22,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 371 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-01-31 17:23:22,840 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 260 flow [2024-01-31 17:23:22,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-01-31 17:23:22,841 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-01-31 17:23:22,841 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 260 flow [2024-01-31 17:23:22,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:22,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:22,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:22,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:23:22,842 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:22,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:22,842 INFO L85 PathProgramCache]: Analyzing trace with hash -773427632, now seen corresponding path program 4 times [2024-01-31 17:23:22,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:22,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834456820] [2024-01-31 17:23:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:22,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:23,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834456820] [2024-01-31 17:23:23,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834456820] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:23:23,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:23:23,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:23:23,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484579618] [2024-01-31 17:23:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:23:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:23:23,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:23:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:23:23,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:23,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:23,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:23,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:23,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:23,226 INFO L124 PetriNetUnfolderBase]: 82/148 cut-off events. [2024-01-31 17:23:23,229 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2024-01-31 17:23:23,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 148 events. 82/148 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 393 event pairs, 5 based on Foata normal form. 4/131 useless extension candidates. Maximal degree in co-relation 566. Up to 98 conditions per place. [2024-01-31 17:23:23,230 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 35 selfloop transitions, 18 changer transitions 0/54 dead transitions. [2024-01-31 17:23:23,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 397 flow [2024-01-31 17:23:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:23:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:23:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-01-31 17:23:23,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-01-31 17:23:23,235 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 260 flow. Second operand 6 states and 64 transitions. [2024-01-31 17:23:23,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 397 flow [2024-01-31 17:23:23,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 373 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-01-31 17:23:23,241 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 279 flow [2024-01-31 17:23:23,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=279, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-01-31 17:23:23,244 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 24 predicate places. [2024-01-31 17:23:23,244 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 279 flow [2024-01-31 17:23:23,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:23,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:23,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:23,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:23:23,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:23,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:23,246 INFO L85 PathProgramCache]: Analyzing trace with hash -390829614, now seen corresponding path program 5 times [2024-01-31 17:23:23,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:23,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97617804] [2024-01-31 17:23:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:23,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:23,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:23,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97617804] [2024-01-31 17:23:23,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97617804] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:23:23,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:23:23,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:23:23,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147286905] [2024-01-31 17:23:23,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:23:23,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:23:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:23:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:23:23,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:23,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:23,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:23,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:23,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:23,644 INFO L124 PetriNetUnfolderBase]: 84/157 cut-off events. [2024-01-31 17:23:23,645 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2024-01-31 17:23:23,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 157 events. 84/157 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 436 event pairs, 4 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 617. Up to 95 conditions per place. [2024-01-31 17:23:23,646 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 33 selfloop transitions, 20 changer transitions 2/56 dead transitions. [2024-01-31 17:23:23,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 434 flow [2024-01-31 17:23:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:23:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:23:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2024-01-31 17:23:23,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-01-31 17:23:23,648 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 279 flow. Second operand 7 states and 67 transitions. [2024-01-31 17:23:23,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 434 flow [2024-01-31 17:23:23,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 56 transitions, 398 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-01-31 17:23:23,651 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 303 flow [2024-01-31 17:23:23,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=303, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-01-31 17:23:23,654 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2024-01-31 17:23:23,655 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 303 flow [2024-01-31 17:23:23,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:23,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:23,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:23:23,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:23,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash -409263640, now seen corresponding path program 6 times [2024-01-31 17:23:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907711697] [2024-01-31 17:23:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:23,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:23,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:23,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907711697] [2024-01-31 17:23:23,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907711697] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:23:23,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:23:23,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:23:23,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035028850] [2024-01-31 17:23:23,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:23:23,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:23:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:23:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:23:23,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:23,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:23,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:23,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:23,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:24,029 INFO L124 PetriNetUnfolderBase]: 102/194 cut-off events. [2024-01-31 17:23:24,030 INFO L125 PetriNetUnfolderBase]: For 313/313 co-relation queries the response was YES. [2024-01-31 17:23:24,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802 conditions, 194 events. 102/194 cut-off events. For 313/313 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 598 event pairs, 4 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 772. Up to 67 conditions per place. [2024-01-31 17:23:24,032 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 39 selfloop transitions, 25 changer transitions 2/67 dead transitions. [2024-01-31 17:23:24,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 526 flow [2024-01-31 17:23:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:23:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:23:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-01-31 17:23:24,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-31 17:23:24,033 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 303 flow. Second operand 8 states and 80 transitions. [2024-01-31 17:23:24,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 526 flow [2024-01-31 17:23:24,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 421 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-01-31 17:23:24,037 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 315 flow [2024-01-31 17:23:24,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=315, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-01-31 17:23:24,037 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2024-01-31 17:23:24,038 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 315 flow [2024-01-31 17:23:24,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:24,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:24,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:24,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-31 17:23:24,038 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:24,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:24,039 INFO L85 PathProgramCache]: Analyzing trace with hash -494842561, now seen corresponding path program 1 times [2024-01-31 17:23:24,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:24,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031577182] [2024-01-31 17:23:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:24,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:24,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031577182] [2024-01-31 17:23:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031577182] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:24,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312167536] [2024-01-31 17:23:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:24,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:24,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:24,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:24,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:23:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:24,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 17:23:24,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:24,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-31 17:23:24,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:24,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:25,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:25,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 59 [2024-01-31 17:23:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:25,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312167536] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:25,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:25,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-01-31 17:23:25,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102320513] [2024-01-31 17:23:25,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:25,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:23:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:25,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:23:25,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:23:25,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:25,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 315 flow. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:25,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:25,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:25,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:27,191 INFO L124 PetriNetUnfolderBase]: 221/418 cut-off events. [2024-01-31 17:23:27,192 INFO L125 PetriNetUnfolderBase]: For 493/493 co-relation queries the response was YES. [2024-01-31 17:23:27,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1653 conditions, 418 events. 221/418 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1699 event pairs, 5 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 1624. Up to 137 conditions per place. [2024-01-31 17:23:27,195 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 86 selfloop transitions, 42 changer transitions 4/133 dead transitions. [2024-01-31 17:23:27,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 133 transitions, 975 flow [2024-01-31 17:23:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:23:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:23:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 158 transitions. [2024-01-31 17:23:27,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-01-31 17:23:27,197 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 315 flow. Second operand 16 states and 158 transitions. [2024-01-31 17:23:27,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 133 transitions, 975 flow [2024-01-31 17:23:27,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 133 transitions, 902 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-01-31 17:23:27,204 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 578 flow [2024-01-31 17:23:27,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=578, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-01-31 17:23:27,206 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 47 predicate places. [2024-01-31 17:23:27,206 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 578 flow [2024-01-31 17:23:27,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:27,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:27,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:27,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:27,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:27,427 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:27,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash 365826473, now seen corresponding path program 2 times [2024-01-31 17:23:27,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:27,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648765477] [2024-01-31 17:23:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:27,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:27,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648765477] [2024-01-31 17:23:27,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648765477] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:27,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622222604] [2024-01-31 17:23:27,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:23:27,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:27,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:27,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:27,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:23:27,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:27,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:27,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 17:23:27,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:27,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:23:28,104 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:23:28,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 104 [2024-01-31 17:23:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:28,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:29,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-01-31 17:23:29,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:29,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-01-31 17:23:30,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-31 17:23:30,038 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:23:30,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2024-01-31 17:23:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:30,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622222604] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:30,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:30,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-01-31 17:23:30,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063993214] [2024-01-31 17:23:30,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:30,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:23:30,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:23:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:23:30,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:30,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 578 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:30,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:30,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:30,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:33,552 INFO L124 PetriNetUnfolderBase]: 517/991 cut-off events. [2024-01-31 17:23:33,553 INFO L125 PetriNetUnfolderBase]: For 2677/2677 co-relation queries the response was YES. [2024-01-31 17:23:33,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4701 conditions, 991 events. 517/991 cut-off events. For 2677/2677 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5200 event pairs, 18 based on Foata normal form. 14/941 useless extension candidates. Maximal degree in co-relation 4463. Up to 273 conditions per place. [2024-01-31 17:23:33,560 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 121 selfloop transitions, 75 changer transitions 82/279 dead transitions. [2024-01-31 17:23:33,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 279 transitions, 2453 flow [2024-01-31 17:23:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:23:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:23:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 298 transitions. [2024-01-31 17:23:33,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48932676518883417 [2024-01-31 17:23:33,563 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 578 flow. Second operand 29 states and 298 transitions. [2024-01-31 17:23:33,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 279 transitions, 2453 flow [2024-01-31 17:23:33,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 279 transitions, 2225 flow, removed 96 selfloop flow, removed 3 redundant places. [2024-01-31 17:23:33,582 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 1042 flow [2024-01-31 17:23:33,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1042, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2024-01-31 17:23:33,583 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 86 predicate places. [2024-01-31 17:23:33,583 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 1042 flow [2024-01-31 17:23:33,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:33,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:33,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:33,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:33,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-01-31 17:23:33,803 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:33,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:33,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1849869089, now seen corresponding path program 3 times [2024-01-31 17:23:33,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:33,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757862871] [2024-01-31 17:23:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:33,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:33,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:33,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757862871] [2024-01-31 17:23:33,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757862871] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:33,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633240977] [2024-01-31 17:23:33,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:23:33,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:33,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:33,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:33,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:23:34,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:23:34,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:34,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-31 17:23:34,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:34,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:23:34,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-31 17:23:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:34,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:35,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-31 17:23:35,732 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:23:35,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-31 17:23:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633240977] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:35,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:35,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-01-31 17:23:35,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856833230] [2024-01-31 17:23:35,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:35,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 17:23:35,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:35,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 17:23:35,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-01-31 17:23:35,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:35,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 1042 flow. Second operand has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:35,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:35,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:35,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:38,716 INFO L124 PetriNetUnfolderBase]: 388/869 cut-off events. [2024-01-31 17:23:38,717 INFO L125 PetriNetUnfolderBase]: For 3577/3577 co-relation queries the response was YES. [2024-01-31 17:23:38,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4252 conditions, 869 events. 388/869 cut-off events. For 3577/3577 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5100 event pairs, 25 based on Foata normal form. 11/832 useless extension candidates. Maximal degree in co-relation 4058. Up to 381 conditions per place. [2024-01-31 17:23:38,724 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 115 selfloop transitions, 85 changer transitions 30/231 dead transitions. [2024-01-31 17:23:38,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 231 transitions, 2202 flow [2024-01-31 17:23:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:23:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:23:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 259 transitions. [2024-01-31 17:23:38,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-01-31 17:23:38,727 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 1042 flow. Second operand 28 states and 259 transitions. [2024-01-31 17:23:38,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 231 transitions, 2202 flow [2024-01-31 17:23:38,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 231 transitions, 2084 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-01-31 17:23:38,746 INFO L231 Difference]: Finished difference. Result has 130 places, 130 transitions, 1457 flow [2024-01-31 17:23:38,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1457, PETRI_PLACES=130, PETRI_TRANSITIONS=130} [2024-01-31 17:23:38,747 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 108 predicate places. [2024-01-31 17:23:38,747 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 130 transitions, 1457 flow [2024-01-31 17:23:38,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.190476190476191) internal successors, (109), 21 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:38,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:38,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:38,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:38,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:38,962 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:38,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:38,963 INFO L85 PathProgramCache]: Analyzing trace with hash -875381067, now seen corresponding path program 4 times [2024-01-31 17:23:38,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:38,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168820803] [2024-01-31 17:23:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:38,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:39,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:39,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168820803] [2024-01-31 17:23:39,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168820803] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:39,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298999444] [2024-01-31 17:23:39,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:23:39,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:39,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:39,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:39,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:23:39,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:23:39,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:39,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:23:39,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:39,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:23:39,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:39,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2024-01-31 17:23:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:39,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:40,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-31 17:23:40,141 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:23:40,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-31 17:23:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:40,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298999444] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:40,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:40,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-01-31 17:23:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701857491] [2024-01-31 17:23:40,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:40,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 17:23:40,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 17:23:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-01-31 17:23:40,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:40,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 130 transitions, 1457 flow. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:40,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:40,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:40,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:41,152 INFO L124 PetriNetUnfolderBase]: 406/937 cut-off events. [2024-01-31 17:23:41,153 INFO L125 PetriNetUnfolderBase]: For 3867/3867 co-relation queries the response was YES. [2024-01-31 17:23:41,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4723 conditions, 937 events. 406/937 cut-off events. For 3867/3867 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5711 event pairs, 2 based on Foata normal form. 7/943 useless extension candidates. Maximal degree in co-relation 4500. Up to 345 conditions per place. [2024-01-31 17:23:41,161 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 103 selfloop transitions, 94 changer transitions 9/207 dead transitions. [2024-01-31 17:23:41,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 207 transitions, 2300 flow [2024-01-31 17:23:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:23:41,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:23:41,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 175 transitions. [2024-01-31 17:23:41,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-31 17:23:41,163 INFO L175 Difference]: Start difference. First operand has 130 places, 130 transitions, 1457 flow. Second operand 20 states and 175 transitions. [2024-01-31 17:23:41,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 207 transitions, 2300 flow [2024-01-31 17:23:41,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 207 transitions, 2153 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-01-31 17:23:41,188 INFO L231 Difference]: Finished difference. Result has 144 places, 146 transitions, 1809 flow [2024-01-31 17:23:41,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1809, PETRI_PLACES=144, PETRI_TRANSITIONS=146} [2024-01-31 17:23:41,189 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2024-01-31 17:23:41,189 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 146 transitions, 1809 flow [2024-01-31 17:23:41,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:41,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:41,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:41,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:41,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:41,407 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:41,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash -746182183, now seen corresponding path program 5 times [2024-01-31 17:23:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:41,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406627952] [2024-01-31 17:23:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:41,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:41,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:41,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406627952] [2024-01-31 17:23:41,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406627952] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:41,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791182082] [2024-01-31 17:23:41,540 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:23:41,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:41,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:41,542 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:41,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:23:41,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:41,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:41,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 17:23:41,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:41,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:23:42,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2024-01-31 17:23:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:42,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:42,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-31 17:23:42,974 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:23:42,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-31 17:23:42,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-01-31 17:23:43,030 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-01-31 17:23:43,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2024-01-31 17:23:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:43,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791182082] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:43,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:43,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-01-31 17:23:43,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080079896] [2024-01-31 17:23:43,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:43,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:23:43,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:43,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:23:43,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:23:43,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:43,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 146 transitions, 1809 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:43,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:43,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:43,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:44,826 INFO L124 PetriNetUnfolderBase]: 439/1016 cut-off events. [2024-01-31 17:23:44,827 INFO L125 PetriNetUnfolderBase]: For 6244/6244 co-relation queries the response was YES. [2024-01-31 17:23:44,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5705 conditions, 1016 events. 439/1016 cut-off events. For 6244/6244 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6362 event pairs, 24 based on Foata normal form. 14/1030 useless extension candidates. Maximal degree in co-relation 5491. Up to 249 conditions per place. [2024-01-31 17:23:44,836 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 99 selfloop transitions, 84 changer transitions 80/264 dead transitions. [2024-01-31 17:23:44,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 264 transitions, 3154 flow [2024-01-31 17:23:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:23:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:23:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 233 transitions. [2024-01-31 17:23:44,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4109347442680776 [2024-01-31 17:23:44,838 INFO L175 Difference]: Start difference. First operand has 144 places, 146 transitions, 1809 flow. Second operand 27 states and 233 transitions. [2024-01-31 17:23:44,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 264 transitions, 3154 flow [2024-01-31 17:23:44,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 264 transitions, 2882 flow, removed 72 selfloop flow, removed 15 redundant places. [2024-01-31 17:23:44,877 INFO L231 Difference]: Finished difference. Result has 161 places, 130 transitions, 1659 flow [2024-01-31 17:23:44,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1659, PETRI_PLACES=161, PETRI_TRANSITIONS=130} [2024-01-31 17:23:44,879 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 139 predicate places. [2024-01-31 17:23:44,879 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 130 transitions, 1659 flow [2024-01-31 17:23:44,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:44,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:44,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:44,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:45,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-01-31 17:23:45,095 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:45,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash 536215191, now seen corresponding path program 6 times [2024-01-31 17:23:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:45,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672329340] [2024-01-31 17:23:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:45,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:45,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:45,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672329340] [2024-01-31 17:23:45,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672329340] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:45,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524588270] [2024-01-31 17:23:45,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:23:45,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:45,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:45,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:45,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:23:45,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:23:45,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:45,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 17:23:45,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:45,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:23:45,540 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:23:45,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 104 [2024-01-31 17:23:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:45,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:46,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-01-31 17:23:46,337 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:46,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-01-31 17:23:46,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-31 17:23:46,978 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-01-31 17:23:46,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2024-01-31 17:23:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:47,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524588270] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:47,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:47,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-01-31 17:23:47,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070159340] [2024-01-31 17:23:47,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:47,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:23:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:47,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:23:47,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:23:47,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:47,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 130 transitions, 1659 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:47,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:47,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:47,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:48,019 INFO L124 PetriNetUnfolderBase]: 316/701 cut-off events. [2024-01-31 17:23:48,019 INFO L125 PetriNetUnfolderBase]: For 4574/4574 co-relation queries the response was YES. [2024-01-31 17:23:48,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4267 conditions, 701 events. 316/701 cut-off events. For 4574/4574 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3810 event pairs, 16 based on Foata normal form. 8/701 useless extension candidates. Maximal degree in co-relation 4076. Up to 473 conditions per place. [2024-01-31 17:23:48,032 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 94 selfloop transitions, 59 changer transitions 27/181 dead transitions. [2024-01-31 17:23:48,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 181 transitions, 2244 flow [2024-01-31 17:23:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 17:23:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 17:23:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 160 transitions. [2024-01-31 17:23:48,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-01-31 17:23:48,034 INFO L175 Difference]: Start difference. First operand has 161 places, 130 transitions, 1659 flow. Second operand 18 states and 160 transitions. [2024-01-31 17:23:48,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 181 transitions, 2244 flow [2024-01-31 17:23:48,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 181 transitions, 2014 flow, removed 60 selfloop flow, removed 25 redundant places. [2024-01-31 17:23:48,065 INFO L231 Difference]: Finished difference. Result has 136 places, 122 transitions, 1508 flow [2024-01-31 17:23:48,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1508, PETRI_PLACES=136, PETRI_TRANSITIONS=122} [2024-01-31 17:23:48,066 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 114 predicate places. [2024-01-31 17:23:48,067 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 122 transitions, 1508 flow [2024-01-31 17:23:48,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:48,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:48,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:48,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:48,282 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:48,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:48,283 INFO L85 PathProgramCache]: Analyzing trace with hash -978910206, now seen corresponding path program 1 times [2024-01-31 17:23:48,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:48,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900587769] [2024-01-31 17:23:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:48,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:48,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:48,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900587769] [2024-01-31 17:23:48,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900587769] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:48,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354863634] [2024-01-31 17:23:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:48,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:48,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:48,427 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:48,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:23:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:48,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:23:48,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:48,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:48,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354863634] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:48,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:48,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:23:48,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680691737] [2024-01-31 17:23:48,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:48,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:23:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:23:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:23:48,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:48,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 122 transitions, 1508 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:48,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:48,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:48,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:49,232 INFO L124 PetriNetUnfolderBase]: 315/679 cut-off events. [2024-01-31 17:23:49,232 INFO L125 PetriNetUnfolderBase]: For 3576/3576 co-relation queries the response was YES. [2024-01-31 17:23:49,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3962 conditions, 679 events. 315/679 cut-off events. For 3576/3576 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3618 event pairs, 41 based on Foata normal form. 16/687 useless extension candidates. Maximal degree in co-relation 3896. Up to 187 conditions per place. [2024-01-31 17:23:49,240 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 120 selfloop transitions, 72 changer transitions 0/193 dead transitions. [2024-01-31 17:23:49,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 193 transitions, 2312 flow [2024-01-31 17:23:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:23:49,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:23:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 144 transitions. [2024-01-31 17:23:49,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-31 17:23:49,241 INFO L175 Difference]: Start difference. First operand has 136 places, 122 transitions, 1508 flow. Second operand 16 states and 144 transitions. [2024-01-31 17:23:49,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 193 transitions, 2312 flow [2024-01-31 17:23:49,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 193 transitions, 2141 flow, removed 14 selfloop flow, removed 15 redundant places. [2024-01-31 17:23:49,263 INFO L231 Difference]: Finished difference. Result has 129 places, 139 transitions, 1696 flow [2024-01-31 17:23:49,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1696, PETRI_PLACES=129, PETRI_TRANSITIONS=139} [2024-01-31 17:23:49,264 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 107 predicate places. [2024-01-31 17:23:49,264 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 139 transitions, 1696 flow [2024-01-31 17:23:49,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:49,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:49,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:49,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:49,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:49,482 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:49,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:49,483 INFO L85 PathProgramCache]: Analyzing trace with hash -683422931, now seen corresponding path program 7 times [2024-01-31 17:23:49,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:49,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288875407] [2024-01-31 17:23:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:49,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:49,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:49,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:49,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288875407] [2024-01-31 17:23:49,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288875407] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:49,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521587492] [2024-01-31 17:23:49,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:23:49,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:49,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:49,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:49,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:23:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:49,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:23:49,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:49,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:49,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2024-01-31 17:23:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:50,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:50,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:50,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 59 [2024-01-31 17:23:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:50,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521587492] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:50,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:50,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-01-31 17:23:50,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532260151] [2024-01-31 17:23:50,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:50,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:23:50,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:23:50,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:23:50,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:50,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 139 transitions, 1696 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:50,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:50,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:50,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:51,366 INFO L124 PetriNetUnfolderBase]: 314/671 cut-off events. [2024-01-31 17:23:51,366 INFO L125 PetriNetUnfolderBase]: For 3612/3612 co-relation queries the response was YES. [2024-01-31 17:23:51,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3990 conditions, 671 events. 314/671 cut-off events. For 3612/3612 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3519 event pairs, 7 based on Foata normal form. 2/673 useless extension candidates. Maximal degree in co-relation 3927. Up to 254 conditions per place. [2024-01-31 17:23:51,373 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 115 selfloop transitions, 70 changer transitions 5/191 dead transitions. [2024-01-31 17:23:51,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 191 transitions, 2308 flow [2024-01-31 17:23:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:23:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:23:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 148 transitions. [2024-01-31 17:23:51,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46984126984126984 [2024-01-31 17:23:51,376 INFO L175 Difference]: Start difference. First operand has 129 places, 139 transitions, 1696 flow. Second operand 15 states and 148 transitions. [2024-01-31 17:23:51,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 191 transitions, 2308 flow [2024-01-31 17:23:51,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 191 transitions, 2179 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-01-31 17:23:51,399 INFO L231 Difference]: Finished difference. Result has 139 places, 138 transitions, 1706 flow [2024-01-31 17:23:51,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1706, PETRI_PLACES=139, PETRI_TRANSITIONS=138} [2024-01-31 17:23:51,400 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2024-01-31 17:23:51,401 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 138 transitions, 1706 flow [2024-01-31 17:23:51,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:51,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:51,401 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:51,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:51,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:23:51,615 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:51,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:51,616 INFO L85 PathProgramCache]: Analyzing trace with hash 805982065, now seen corresponding path program 8 times [2024-01-31 17:23:51,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:51,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820418932] [2024-01-31 17:23:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:51,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:51,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:51,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820418932] [2024-01-31 17:23:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820418932] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:51,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484987277] [2024-01-31 17:23:51,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:23:51,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:51,804 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:51,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:23:51,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:51,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:51,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 36 conjunts are in the unsatisfiable core [2024-01-31 17:23:51,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:51,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:23:51,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-31 17:23:52,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:52,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2024-01-31 17:23:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:52,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:52,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-01-31 17:23:52,921 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:23:52,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 462 treesize of output 369 [2024-01-31 17:23:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:53,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484987277] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:53,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:53,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 23 [2024-01-31 17:23:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695743248] [2024-01-31 17:23:53,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:23:53,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:23:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:23:53,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:53,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 138 transitions, 1706 flow. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:53,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:53,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:53,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:54,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:23:55,150 INFO L124 PetriNetUnfolderBase]: 313/660 cut-off events. [2024-01-31 17:23:55,150 INFO L125 PetriNetUnfolderBase]: For 3504/3504 co-relation queries the response was YES. [2024-01-31 17:23:55,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3942 conditions, 660 events. 313/660 cut-off events. For 3504/3504 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3393 event pairs, 19 based on Foata normal form. 2/662 useless extension candidates. Maximal degree in co-relation 3878. Up to 422 conditions per place. [2024-01-31 17:23:55,157 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 116 selfloop transitions, 56 changer transitions 0/173 dead transitions. [2024-01-31 17:23:55,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 173 transitions, 2161 flow [2024-01-31 17:23:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:23:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:23:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 134 transitions. [2024-01-31 17:23:55,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253968253968254 [2024-01-31 17:23:55,159 INFO L175 Difference]: Start difference. First operand has 139 places, 138 transitions, 1706 flow. Second operand 15 states and 134 transitions. [2024-01-31 17:23:55,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 173 transitions, 2161 flow [2024-01-31 17:23:55,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 173 transitions, 2028 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-01-31 17:23:55,178 INFO L231 Difference]: Finished difference. Result has 142 places, 139 transitions, 1717 flow [2024-01-31 17:23:55,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1565, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1717, PETRI_PLACES=142, PETRI_TRANSITIONS=139} [2024-01-31 17:23:55,179 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 120 predicate places. [2024-01-31 17:23:55,179 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 139 transitions, 1717 flow [2024-01-31 17:23:55,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:55,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:55,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:55,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-31 17:23:55,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:23:55,393 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:55,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:55,394 INFO L85 PathProgramCache]: Analyzing trace with hash -837177816, now seen corresponding path program 2 times [2024-01-31 17:23:55,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:55,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328141168] [2024-01-31 17:23:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:55,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328141168] [2024-01-31 17:23:55,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328141168] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:55,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392491687] [2024-01-31 17:23:55,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:23:55,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:55,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:55,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:55,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:23:55,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:55,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:55,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:23:55,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:55,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:55,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392491687] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:55,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:55,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-01-31 17:23:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951942914] [2024-01-31 17:23:55,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:55,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-31 17:23:55,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:55,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-31 17:23:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-31 17:23:55,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:55,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 139 transitions, 1717 flow. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 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) [2024-01-31 17:23:55,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:55,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:55,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:56,490 INFO L124 PetriNetUnfolderBase]: 413/873 cut-off events. [2024-01-31 17:23:56,490 INFO L125 PetriNetUnfolderBase]: For 4787/4787 co-relation queries the response was YES. [2024-01-31 17:23:56,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 873 events. 413/873 cut-off events. For 4787/4787 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4935 event pairs, 76 based on Foata normal form. 24/897 useless extension candidates. Maximal degree in co-relation 4978. Up to 337 conditions per place. [2024-01-31 17:23:56,498 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 165 selfloop transitions, 86 changer transitions 0/252 dead transitions. [2024-01-31 17:23:56,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 252 transitions, 2969 flow [2024-01-31 17:23:56,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:23:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:23:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 182 transitions. [2024-01-31 17:23:56,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-01-31 17:23:56,500 INFO L175 Difference]: Start difference. First operand has 142 places, 139 transitions, 1717 flow. Second operand 17 states and 182 transitions. [2024-01-31 17:23:56,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 252 transitions, 2969 flow [2024-01-31 17:23:56,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 252 transitions, 2900 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-01-31 17:23:56,524 INFO L231 Difference]: Finished difference. Result has 158 places, 180 transitions, 2454 flow [2024-01-31 17:23:56,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2454, PETRI_PLACES=158, PETRI_TRANSITIONS=180} [2024-01-31 17:23:56,524 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2024-01-31 17:23:56,525 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 180 transitions, 2454 flow [2024-01-31 17:23:56,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 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) [2024-01-31 17:23:56,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:56,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:56,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:56,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 17:23:56,740 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:56,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1694873620, now seen corresponding path program 3 times [2024-01-31 17:23:56,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:56,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44186071] [2024-01-31 17:23:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:56,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:56,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:56,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44186071] [2024-01-31 17:23:56,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44186071] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:56,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016860027] [2024-01-31 17:23:56,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:23:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:56,876 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:56,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 17:23:57,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:23:57,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:57,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:57,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:57,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:57,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016860027] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:57,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:57,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:23:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26385428] [2024-01-31 17:23:57,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:57,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:23:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:57,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:23:57,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:23:57,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:57,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 180 transitions, 2454 flow. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:57,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:57,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:57,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:01,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:24:01,858 INFO L124 PetriNetUnfolderBase]: 412/873 cut-off events. [2024-01-31 17:24:01,858 INFO L125 PetriNetUnfolderBase]: For 5635/5635 co-relation queries the response was YES. [2024-01-31 17:24:01,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5502 conditions, 873 events. 412/873 cut-off events. For 5635/5635 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4909 event pairs, 49 based on Foata normal form. 16/889 useless extension candidates. Maximal degree in co-relation 5428. Up to 259 conditions per place. [2024-01-31 17:24:01,867 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 143 selfloop transitions, 96 changer transitions 0/240 dead transitions. [2024-01-31 17:24:01,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 240 transitions, 3159 flow [2024-01-31 17:24:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:24:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:24:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 165 transitions. [2024-01-31 17:24:01,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46218487394957986 [2024-01-31 17:24:01,869 INFO L175 Difference]: Start difference. First operand has 158 places, 180 transitions, 2454 flow. Second operand 17 states and 165 transitions. [2024-01-31 17:24:01,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 240 transitions, 3159 flow [2024-01-31 17:24:01,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 240 transitions, 2996 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-01-31 17:24:01,903 INFO L231 Difference]: Finished difference. Result has 175 places, 181 transitions, 2525 flow [2024-01-31 17:24:01,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2525, PETRI_PLACES=175, PETRI_TRANSITIONS=181} [2024-01-31 17:24:01,904 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 153 predicate places. [2024-01-31 17:24:01,904 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 181 transitions, 2525 flow [2024-01-31 17:24:01,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:01,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:01,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:01,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:02,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 17:24:02,119 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:02,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:02,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1739445774, now seen corresponding path program 4 times [2024-01-31 17:24:02,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:02,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309790040] [2024-01-31 17:24:02,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:02,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:02,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:02,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309790040] [2024-01-31 17:24:02,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309790040] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:02,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701385291] [2024-01-31 17:24:02,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:24:02,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:02,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:02,249 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:02,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 17:24:02,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:24:02,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:02,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:24:02,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:02,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:02,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701385291] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:02,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:02,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:24:02,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429529220] [2024-01-31 17:24:02,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:02,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:24:02,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:02,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:24:02,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:24:02,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:02,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 181 transitions, 2525 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:02,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:02,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:02,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:03,256 INFO L124 PetriNetUnfolderBase]: 408/841 cut-off events. [2024-01-31 17:24:03,256 INFO L125 PetriNetUnfolderBase]: For 5352/5352 co-relation queries the response was YES. [2024-01-31 17:24:03,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5392 conditions, 841 events. 408/841 cut-off events. For 5352/5352 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4575 event pairs, 76 based on Foata normal form. 8/849 useless extension candidates. Maximal degree in co-relation 5314. Up to 337 conditions per place. [2024-01-31 17:24:03,266 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 152 selfloop transitions, 82 changer transitions 0/235 dead transitions. [2024-01-31 17:24:03,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 235 transitions, 3160 flow [2024-01-31 17:24:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:24:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:24:03,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 167 transitions. [2024-01-31 17:24:03,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677871148459384 [2024-01-31 17:24:03,268 INFO L175 Difference]: Start difference. First operand has 175 places, 181 transitions, 2525 flow. Second operand 17 states and 167 transitions. [2024-01-31 17:24:03,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 235 transitions, 3160 flow [2024-01-31 17:24:03,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 235 transitions, 3000 flow, removed 24 selfloop flow, removed 13 redundant places. [2024-01-31 17:24:03,305 INFO L231 Difference]: Finished difference. Result has 181 places, 182 transitions, 2579 flow [2024-01-31 17:24:03,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2579, PETRI_PLACES=181, PETRI_TRANSITIONS=182} [2024-01-31 17:24:03,306 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 159 predicate places. [2024-01-31 17:24:03,306 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 182 transitions, 2579 flow [2024-01-31 17:24:03,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:03,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:03,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:03,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:03,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:03,524 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:03,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash -855691780, now seen corresponding path program 5 times [2024-01-31 17:24:03,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:03,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470846622] [2024-01-31 17:24:03,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:03,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:03,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:03,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470846622] [2024-01-31 17:24:03,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470846622] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:03,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979147816] [2024-01-31 17:24:03,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:24:03,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:03,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:03,666 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:03,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 17:24:03,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:24:03,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:03,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:24:03,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:03,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:03,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979147816] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:03,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:03,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-31 17:24:03,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198845693] [2024-01-31 17:24:03,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:03,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:24:03,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:03,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:24:03,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:24:03,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:03,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 182 transitions, 2579 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:03,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:03,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:03,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:05,580 INFO L124 PetriNetUnfolderBase]: 518/1017 cut-off events. [2024-01-31 17:24:05,580 INFO L125 PetriNetUnfolderBase]: For 6677/6677 co-relation queries the response was YES. [2024-01-31 17:24:05,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6612 conditions, 1017 events. 518/1017 cut-off events. For 6677/6677 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5585 event pairs, 70 based on Foata normal form. 20/1037 useless extension candidates. Maximal degree in co-relation 6536. Up to 360 conditions per place. [2024-01-31 17:24:05,597 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 153 selfloop transitions, 116 changer transitions 0/270 dead transitions. [2024-01-31 17:24:05,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 270 transitions, 3913 flow [2024-01-31 17:24:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:24:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:24:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2024-01-31 17:24:05,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-01-31 17:24:05,601 INFO L175 Difference]: Start difference. First operand has 181 places, 182 transitions, 2579 flow. Second operand 16 states and 147 transitions. [2024-01-31 17:24:05,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 270 transitions, 3913 flow [2024-01-31 17:24:05,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 270 transitions, 3732 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-01-31 17:24:05,692 INFO L231 Difference]: Finished difference. Result has 189 places, 216 transitions, 3189 flow [2024-01-31 17:24:05,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3189, PETRI_PLACES=189, PETRI_TRANSITIONS=216} [2024-01-31 17:24:05,693 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 167 predicate places. [2024-01-31 17:24:05,693 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 216 transitions, 3189 flow [2024-01-31 17:24:05,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:05,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:05,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:05,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:05,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-01-31 17:24:05,908 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:05,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:05,909 INFO L85 PathProgramCache]: Analyzing trace with hash 470096963, now seen corresponding path program 9 times [2024-01-31 17:24:05,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:05,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687377369] [2024-01-31 17:24:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:05,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:06,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:06,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687377369] [2024-01-31 17:24:06,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687377369] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:06,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821272749] [2024-01-31 17:24:06,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:24:06,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:06,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:06,058 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:06,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 17:24:06,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:24:06,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:06,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 17:24:06,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:06,530 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:06,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2024-01-31 17:24:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:06,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:06,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:06,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 154 [2024-01-31 17:24:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:07,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821272749] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:07,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:07,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-01-31 17:24:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88538163] [2024-01-31 17:24:07,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:07,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:24:07,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:07,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:24:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:24:07,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:07,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 216 transitions, 3189 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:07,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:07,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:07,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:08,444 INFO L124 PetriNetUnfolderBase]: 519/1018 cut-off events. [2024-01-31 17:24:08,445 INFO L125 PetriNetUnfolderBase]: For 6865/6865 co-relation queries the response was YES. [2024-01-31 17:24:08,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6904 conditions, 1018 events. 519/1018 cut-off events. For 6865/6865 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5584 event pairs, 3 based on Foata normal form. 3/1021 useless extension candidates. Maximal degree in co-relation 6826. Up to 645 conditions per place. [2024-01-31 17:24:08,457 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 141 selfloop transitions, 106 changer transitions 5/253 dead transitions. [2024-01-31 17:24:08,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 253 transitions, 3831 flow [2024-01-31 17:24:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:24:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:24:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2024-01-31 17:24:08,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-01-31 17:24:08,458 INFO L175 Difference]: Start difference. First operand has 189 places, 216 transitions, 3189 flow. Second operand 16 states and 130 transitions. [2024-01-31 17:24:08,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 253 transitions, 3831 flow [2024-01-31 17:24:08,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 253 transitions, 3630 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-01-31 17:24:08,504 INFO L231 Difference]: Finished difference. Result has 203 places, 217 transitions, 3230 flow [2024-01-31 17:24:08,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3230, PETRI_PLACES=203, PETRI_TRANSITIONS=217} [2024-01-31 17:24:08,505 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 181 predicate places. [2024-01-31 17:24:08,505 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 217 transitions, 3230 flow [2024-01-31 17:24:08,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:08,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:08,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:08,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:08,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:08,706 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:08,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash -2017665944, now seen corresponding path program 6 times [2024-01-31 17:24:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:08,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706983091] [2024-01-31 17:24:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:08,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:08,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:08,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706983091] [2024-01-31 17:24:08,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706983091] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:08,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035992702] [2024-01-31 17:24:08,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:24:08,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:08,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:08,892 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:08,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 17:24:09,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:24:09,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:09,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:24:09,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:09,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:09,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035992702] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:09,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:09,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:24:09,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573075260] [2024-01-31 17:24:09,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:09,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:24:09,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:09,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:24:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:24:09,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:09,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 217 transitions, 3230 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:09,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:09,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:09,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:10,593 INFO L124 PetriNetUnfolderBase]: 635/1237 cut-off events. [2024-01-31 17:24:10,593 INFO L125 PetriNetUnfolderBase]: For 9963/9963 co-relation queries the response was YES. [2024-01-31 17:24:10,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8573 conditions, 1237 events. 635/1237 cut-off events. For 9963/9963 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7092 event pairs, 99 based on Foata normal form. 10/1247 useless extension candidates. Maximal degree in co-relation 8489. Up to 595 conditions per place. [2024-01-31 17:24:10,604 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 186 selfloop transitions, 136 changer transitions 0/323 dead transitions. [2024-01-31 17:24:10,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 323 transitions, 4929 flow [2024-01-31 17:24:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:24:10,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:24:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 162 transitions. [2024-01-31 17:24:10,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-01-31 17:24:10,605 INFO L175 Difference]: Start difference. First operand has 203 places, 217 transitions, 3230 flow. Second operand 16 states and 162 transitions. [2024-01-31 17:24:10,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 323 transitions, 4929 flow [2024-01-31 17:24:10,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 323 transitions, 4744 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-01-31 17:24:10,649 INFO L231 Difference]: Finished difference. Result has 213 places, 259 transitions, 4206 flow [2024-01-31 17:24:10,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4206, PETRI_PLACES=213, PETRI_TRANSITIONS=259} [2024-01-31 17:24:10,650 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 191 predicate places. [2024-01-31 17:24:10,650 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 259 transitions, 4206 flow [2024-01-31 17:24:10,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:10,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:10,650 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:10,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:10,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:10,856 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:10,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:10,857 INFO L85 PathProgramCache]: Analyzing trace with hash 961144048, now seen corresponding path program 7 times [2024-01-31 17:24:10,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:10,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085034434] [2024-01-31 17:24:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:10,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:11,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:11,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085034434] [2024-01-31 17:24:11,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085034434] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:11,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703076924] [2024-01-31 17:24:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:24:11,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:11,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:11,069 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:11,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 17:24:11,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:11,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:24:11,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:11,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:11,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703076924] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:11,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:11,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:24:11,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913288388] [2024-01-31 17:24:11,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:11,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:24:11,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:11,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:24:11,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:24:11,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:11,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 259 transitions, 4206 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:11,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:11,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:11,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:12,099 INFO L124 PetriNetUnfolderBase]: 893/1777 cut-off events. [2024-01-31 17:24:12,099 INFO L125 PetriNetUnfolderBase]: For 18620/18620 co-relation queries the response was YES. [2024-01-31 17:24:12,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12836 conditions, 1777 events. 893/1777 cut-off events. For 18620/18620 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11179 event pairs, 57 based on Foata normal form. 8/1785 useless extension candidates. Maximal degree in co-relation 12746. Up to 563 conditions per place. [2024-01-31 17:24:12,118 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 213 selfloop transitions, 210 changer transitions 0/424 dead transitions. [2024-01-31 17:24:12,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 424 transitions, 7168 flow [2024-01-31 17:24:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:24:12,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:24:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 163 transitions. [2024-01-31 17:24:12,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174603174603175 [2024-01-31 17:24:12,120 INFO L175 Difference]: Start difference. First operand has 213 places, 259 transitions, 4206 flow. Second operand 15 states and 163 transitions. [2024-01-31 17:24:12,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 424 transitions, 7168 flow [2024-01-31 17:24:12,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 424 transitions, 6911 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-01-31 17:24:12,247 INFO L231 Difference]: Finished difference. Result has 232 places, 331 transitions, 5990 flow [2024-01-31 17:24:12,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4009, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5990, PETRI_PLACES=232, PETRI_TRANSITIONS=331} [2024-01-31 17:24:12,248 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 210 predicate places. [2024-01-31 17:24:12,248 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 331 transitions, 5990 flow [2024-01-31 17:24:12,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:12,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:12,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:12,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-31 17:24:12,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-31 17:24:12,464 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:12,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1099620177, now seen corresponding path program 10 times [2024-01-31 17:24:12,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:12,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127495927] [2024-01-31 17:24:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:12,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127495927] [2024-01-31 17:24:12,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127495927] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061371695] [2024-01-31 17:24:12,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:24:12,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:12,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:12,608 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:12,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 17:24:12,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:24:12,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:12,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 17:24:12,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:12,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:24:12,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-31 17:24:12,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-31 17:24:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:13,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:13,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-01-31 17:24:13,986 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:24:13,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 444 treesize of output 351 [2024-01-31 17:24:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:14,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061371695] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:14,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:14,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 23 [2024-01-31 17:24:14,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946401272] [2024-01-31 17:24:14,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:14,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:24:14,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:14,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:24:14,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:24:14,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:14,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 331 transitions, 5990 flow. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:14,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:14,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:14,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:15,563 INFO L124 PetriNetUnfolderBase]: 892/1778 cut-off events. [2024-01-31 17:24:15,563 INFO L125 PetriNetUnfolderBase]: For 21355/21355 co-relation queries the response was YES. [2024-01-31 17:24:15,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13784 conditions, 1778 events. 892/1778 cut-off events. For 21355/21355 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 11100 event pairs, 96 based on Foata normal form. 4/1782 useless extension candidates. Maximal degree in co-relation 13685. Up to 1552 conditions per place. [2024-01-31 17:24:15,580 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 297 selfloop transitions, 69 changer transitions 4/371 dead transitions. [2024-01-31 17:24:15,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 371 transitions, 6898 flow [2024-01-31 17:24:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:24:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:24:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 145 transitions. [2024-01-31 17:24:15,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4061624649859944 [2024-01-31 17:24:15,582 INFO L175 Difference]: Start difference. First operand has 232 places, 331 transitions, 5990 flow. Second operand 17 states and 145 transitions. [2024-01-31 17:24:15,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 371 transitions, 6898 flow [2024-01-31 17:24:15,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 371 transitions, 6596 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-01-31 17:24:15,723 INFO L231 Difference]: Finished difference. Result has 245 places, 333 transitions, 5871 flow [2024-01-31 17:24:15,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5662, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5871, PETRI_PLACES=245, PETRI_TRANSITIONS=333} [2024-01-31 17:24:15,724 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 223 predicate places. [2024-01-31 17:24:15,724 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 333 transitions, 5871 flow [2024-01-31 17:24:15,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:15,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:15,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:15,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:15,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:15,939 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:15,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash -160794088, now seen corresponding path program 8 times [2024-01-31 17:24:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:15,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819268936] [2024-01-31 17:24:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:15,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:16,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:16,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819268936] [2024-01-31 17:24:16,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819268936] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:16,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309334030] [2024-01-31 17:24:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:24:16,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:16,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:16,100 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:16,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 17:24:16,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:24:16,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:16,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:24:16,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:16,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:16,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309334030] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:16,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:16,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:24:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412905086] [2024-01-31 17:24:16,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:16,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:24:16,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:16,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:24:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:24:16,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:16,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 333 transitions, 5871 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:16,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:16,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:16,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:17,246 INFO L124 PetriNetUnfolderBase]: 869/1729 cut-off events. [2024-01-31 17:24:17,246 INFO L125 PetriNetUnfolderBase]: For 20547/20547 co-relation queries the response was YES. [2024-01-31 17:24:17,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13203 conditions, 1729 events. 869/1729 cut-off events. For 20547/20547 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10730 event pairs, 192 based on Foata normal form. 28/1757 useless extension candidates. Maximal degree in co-relation 13099. Up to 1086 conditions per place. [2024-01-31 17:24:17,262 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 238 selfloop transitions, 142 changer transitions 0/381 dead transitions. [2024-01-31 17:24:17,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 381 transitions, 6843 flow [2024-01-31 17:24:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:24:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:24:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 153 transitions. [2024-01-31 17:24:17,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-31 17:24:17,263 INFO L175 Difference]: Start difference. First operand has 245 places, 333 transitions, 5871 flow. Second operand 17 states and 153 transitions. [2024-01-31 17:24:17,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 381 transitions, 6843 flow [2024-01-31 17:24:17,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 381 transitions, 6689 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-01-31 17:24:17,367 INFO L231 Difference]: Finished difference. Result has 251 places, 333 transitions, 6044 flow [2024-01-31 17:24:17,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5573, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6044, PETRI_PLACES=251, PETRI_TRANSITIONS=333} [2024-01-31 17:24:17,368 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 229 predicate places. [2024-01-31 17:24:17,368 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 333 transitions, 6044 flow [2024-01-31 17:24:17,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:17,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:17,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:17,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-01-31 17:24:17,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:17,576 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:17,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash 942710022, now seen corresponding path program 9 times [2024-01-31 17:24:17,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:17,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60984008] [2024-01-31 17:24:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:17,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:17,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:17,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60984008] [2024-01-31 17:24:17,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60984008] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:17,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751147663] [2024-01-31 17:24:17,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:24:17,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:17,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:17,703 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:17,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 17:24:17,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:24:17,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:17,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:24:17,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:17,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:17,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751147663] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:17,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:17,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:24:17,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821081942] [2024-01-31 17:24:17,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:17,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:24:17,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:24:17,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:24:17,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:17,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 333 transitions, 6044 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:17,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:17,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:17,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:18,674 INFO L124 PetriNetUnfolderBase]: 866/1705 cut-off events. [2024-01-31 17:24:18,674 INFO L125 PetriNetUnfolderBase]: For 20711/20711 co-relation queries the response was YES. [2024-01-31 17:24:18,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13461 conditions, 1705 events. 866/1705 cut-off events. For 20711/20711 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 10484 event pairs, 47 based on Foata normal form. 6/1711 useless extension candidates. Maximal degree in co-relation 13357. Up to 643 conditions per place. [2024-01-31 17:24:18,690 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 211 selfloop transitions, 195 changer transitions 0/407 dead transitions. [2024-01-31 17:24:18,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 407 transitions, 7634 flow [2024-01-31 17:24:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:24:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:24:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 150 transitions. [2024-01-31 17:24:18,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-31 17:24:18,693 INFO L175 Difference]: Start difference. First operand has 251 places, 333 transitions, 6044 flow. Second operand 15 states and 150 transitions. [2024-01-31 17:24:18,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 407 transitions, 7634 flow [2024-01-31 17:24:18,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 407 transitions, 7511 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-01-31 17:24:18,806 INFO L231 Difference]: Finished difference. Result has 260 places, 343 transitions, 6565 flow [2024-01-31 17:24:18,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5923, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6565, PETRI_PLACES=260, PETRI_TRANSITIONS=343} [2024-01-31 17:24:18,807 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 238 predicate places. [2024-01-31 17:24:18,807 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 343 transitions, 6565 flow [2024-01-31 17:24:18,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:18,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:18,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:18,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:19,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:19,008 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:19,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1482313772, now seen corresponding path program 10 times [2024-01-31 17:24:19,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:19,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662292407] [2024-01-31 17:24:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:19,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:19,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:19,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662292407] [2024-01-31 17:24:19,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662292407] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:19,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904077029] [2024-01-31 17:24:19,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:24:19,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:19,194 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:19,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 17:24:19,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:24:19,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:19,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:24:19,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:19,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:19,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904077029] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:19,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:19,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:24:19,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693904678] [2024-01-31 17:24:19,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:19,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:24:19,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:19,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:24:19,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:24:19,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:19,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 343 transitions, 6565 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:19,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:19,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:19,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:20,286 INFO L124 PetriNetUnfolderBase]: 853/1671 cut-off events. [2024-01-31 17:24:20,286 INFO L125 PetriNetUnfolderBase]: For 23618/23618 co-relation queries the response was YES. [2024-01-31 17:24:20,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13824 conditions, 1671 events. 853/1671 cut-off events. For 23618/23618 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 10141 event pairs, 49 based on Foata normal form. 16/1687 useless extension candidates. Maximal degree in co-relation 13715. Up to 549 conditions per place. [2024-01-31 17:24:20,301 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 207 selfloop transitions, 209 changer transitions 0/417 dead transitions. [2024-01-31 17:24:20,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 417 transitions, 8082 flow [2024-01-31 17:24:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:24:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:24:20,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 174 transitions. [2024-01-31 17:24:20,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43609022556390975 [2024-01-31 17:24:20,305 INFO L175 Difference]: Start difference. First operand has 260 places, 343 transitions, 6565 flow. Second operand 19 states and 174 transitions. [2024-01-31 17:24:20,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 417 transitions, 8082 flow [2024-01-31 17:24:20,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 417 transitions, 7938 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-01-31 17:24:20,424 INFO L231 Difference]: Finished difference. Result has 278 places, 343 transitions, 6862 flow [2024-01-31 17:24:20,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6333, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6862, PETRI_PLACES=278, PETRI_TRANSITIONS=343} [2024-01-31 17:24:20,425 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 256 predicate places. [2024-01-31 17:24:20,425 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 343 transitions, 6862 flow [2024-01-31 17:24:20,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:20,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:20,426 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:20,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:20,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 17:24:20,635 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:20,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash 46164820, now seen corresponding path program 11 times [2024-01-31 17:24:20,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:20,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280213097] [2024-01-31 17:24:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:20,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:21,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:21,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280213097] [2024-01-31 17:24:21,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280213097] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:21,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755344642] [2024-01-31 17:24:21,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:24:21,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:21,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:21,400 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:21,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 17:24:21,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:24:21,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:21,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:24:21,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:21,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:21,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2024-01-31 17:24:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:21,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:22,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:22,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 198 [2024-01-31 17:24:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:23,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755344642] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:23,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:23,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2024-01-31 17:24:23,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666338850] [2024-01-31 17:24:23,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:23,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-01-31 17:24:23,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:23,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-01-31 17:24:23,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2024-01-31 17:24:23,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:23,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 343 transitions, 6862 flow. Second operand has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:23,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:23,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:23,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:24,816 INFO L124 PetriNetUnfolderBase]: 1070/2100 cut-off events. [2024-01-31 17:24:24,817 INFO L125 PetriNetUnfolderBase]: For 28119/28119 co-relation queries the response was YES. [2024-01-31 17:24:24,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17811 conditions, 2100 events. 1070/2100 cut-off events. For 28119/28119 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13366 event pairs, 12 based on Foata normal form. 1/2101 useless extension candidates. Maximal degree in co-relation 17586. Up to 943 conditions per place. [2024-01-31 17:24:24,836 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 261 selfloop transitions, 229 changer transitions 2/493 dead transitions. [2024-01-31 17:24:24,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 493 transitions, 9881 flow [2024-01-31 17:24:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:24:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:24:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 211 transitions. [2024-01-31 17:24:24,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.358843537414966 [2024-01-31 17:24:24,838 INFO L175 Difference]: Start difference. First operand has 278 places, 343 transitions, 6862 flow. Second operand 28 states and 211 transitions. [2024-01-31 17:24:24,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 493 transitions, 9881 flow [2024-01-31 17:24:24,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 493 transitions, 9265 flow, removed 41 selfloop flow, removed 12 redundant places. [2024-01-31 17:24:24,990 INFO L231 Difference]: Finished difference. Result has 299 places, 437 transitions, 8821 flow [2024-01-31 17:24:24,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8821, PETRI_PLACES=299, PETRI_TRANSITIONS=437} [2024-01-31 17:24:24,990 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 277 predicate places. [2024-01-31 17:24:24,991 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 437 transitions, 8821 flow [2024-01-31 17:24:24,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.869565217391305) internal successors, (112), 23 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:24,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:24,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:25,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-31 17:24:25,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-31 17:24:25,196 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:25,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1897551926, now seen corresponding path program 12 times [2024-01-31 17:24:25,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:25,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977474101] [2024-01-31 17:24:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:25,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:25,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977474101] [2024-01-31 17:24:25,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977474101] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:25,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11255343] [2024-01-31 17:24:25,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:24:25,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:25,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:25,836 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:25,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 17:24:25,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:24:25,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:25,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:24:25,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:26,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:26,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 23 [2024-01-31 17:24:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:26,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:27,230 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:27,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 77 [2024-01-31 17:24:27,318 INFO L349 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2024-01-31 17:24:27,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 39 [2024-01-31 17:24:27,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:27,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2024-01-31 17:24:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:27,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11255343] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:27,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:27,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-01-31 17:24:27,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829057316] [2024-01-31 17:24:27,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:27,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:24:27,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:27,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:24:27,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:24:27,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:27,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 437 transitions, 8821 flow. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:27,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:27,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:27,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:30,130 INFO L124 PetriNetUnfolderBase]: 1111/2179 cut-off events. [2024-01-31 17:24:30,131 INFO L125 PetriNetUnfolderBase]: For 32034/32034 co-relation queries the response was YES. [2024-01-31 17:24:30,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19011 conditions, 2179 events. 1111/2179 cut-off events. For 32034/32034 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 14026 event pairs, 12 based on Foata normal form. 3/2182 useless extension candidates. Maximal degree in co-relation 18777. Up to 1427 conditions per place. [2024-01-31 17:24:30,154 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 317 selfloop transitions, 204 changer transitions 16/538 dead transitions. [2024-01-31 17:24:30,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 538 transitions, 10691 flow [2024-01-31 17:24:30,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-31 17:24:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-31 17:24:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 289 transitions. [2024-01-31 17:24:30,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38227513227513227 [2024-01-31 17:24:30,155 INFO L175 Difference]: Start difference. First operand has 299 places, 437 transitions, 8821 flow. Second operand 36 states and 289 transitions. [2024-01-31 17:24:30,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 538 transitions, 10691 flow [2024-01-31 17:24:30,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 538 transitions, 10486 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-01-31 17:24:30,344 INFO L231 Difference]: Finished difference. Result has 332 places, 454 transitions, 9718 flow [2024-01-31 17:24:30,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8624, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=9718, PETRI_PLACES=332, PETRI_TRANSITIONS=454} [2024-01-31 17:24:30,345 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 310 predicate places. [2024-01-31 17:24:30,346 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 454 transitions, 9718 flow [2024-01-31 17:24:30,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:30,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:30,346 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:30,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-01-31 17:24:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 17:24:30,548 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:30,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:30,549 INFO L85 PathProgramCache]: Analyzing trace with hash 611387231, now seen corresponding path program 1 times [2024-01-31 17:24:30,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:30,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977739853] [2024-01-31 17:24:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:30,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:30,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977739853] [2024-01-31 17:24:30,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977739853] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:30,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160285620] [2024-01-31 17:24:30,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:30,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:30,720 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:30,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 17:24:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:30,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:24:30,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:31,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160285620] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:31,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:31,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-01-31 17:24:31,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786744570] [2024-01-31 17:24:31,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:31,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:24:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:24:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:24:31,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:31,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 454 transitions, 9718 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:31,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:31,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:31,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:33,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:24:38,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:24:41,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:24:45,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:24:49,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:24:54,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:24:58,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:24:59,048 INFO L124 PetriNetUnfolderBase]: 1514/2992 cut-off events. [2024-01-31 17:24:59,049 INFO L125 PetriNetUnfolderBase]: For 55361/55361 co-relation queries the response was YES. [2024-01-31 17:24:59,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26829 conditions, 2992 events. 1514/2992 cut-off events. For 55361/55361 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20328 event pairs, 156 based on Foata normal form. 24/3016 useless extension candidates. Maximal degree in co-relation 26656. Up to 749 conditions per place. [2024-01-31 17:24:59,077 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 354 selfloop transitions, 340 changer transitions 1/696 dead transitions. [2024-01-31 17:24:59,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 696 transitions, 14522 flow [2024-01-31 17:24:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 17:24:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 17:24:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 280 transitions. [2024-01-31 17:24:59,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-31 17:24:59,079 INFO L175 Difference]: Start difference. First operand has 332 places, 454 transitions, 9718 flow. Second operand 32 states and 280 transitions. [2024-01-31 17:24:59,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 696 transitions, 14522 flow [2024-01-31 17:24:59,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 696 transitions, 14272 flow, removed 71 selfloop flow, removed 21 redundant places. [2024-01-31 17:24:59,376 INFO L231 Difference]: Finished difference. Result has 350 places, 534 transitions, 12187 flow [2024-01-31 17:24:59,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9514, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12187, PETRI_PLACES=350, PETRI_TRANSITIONS=534} [2024-01-31 17:24:59,377 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 328 predicate places. [2024-01-31 17:24:59,377 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 534 transitions, 12187 flow [2024-01-31 17:24:59,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:59,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:59,377 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:59,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-31 17:24:59,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:59,578 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:59,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:59,578 INFO L85 PathProgramCache]: Analyzing trace with hash -613255223, now seen corresponding path program 13 times [2024-01-31 17:24:59,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:59,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222791064] [2024-01-31 17:24:59,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:59,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:59,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:59,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222791064] [2024-01-31 17:24:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222791064] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:59,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162922792] [2024-01-31 17:24:59,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:24:59,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:59,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:59,724 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:59,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 17:24:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:59,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:24:59,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:59,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:00,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162922792] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:00,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:00,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 17 [2024-01-31 17:25:00,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029257439] [2024-01-31 17:25:00,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:00,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:25:00,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:00,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:25:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:25:00,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:00,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 534 transitions, 12187 flow. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:00,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:00,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:00,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:01,411 INFO L124 PetriNetUnfolderBase]: 1504/2964 cut-off events. [2024-01-31 17:25:01,411 INFO L125 PetriNetUnfolderBase]: For 61787/61787 co-relation queries the response was YES. [2024-01-31 17:25:01,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27674 conditions, 2964 events. 1504/2964 cut-off events. For 61787/61787 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19980 event pairs, 204 based on Foata normal form. 42/3006 useless extension candidates. Maximal degree in co-relation 27482. Up to 731 conditions per place. [2024-01-31 17:25:01,442 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 461 selfloop transitions, 190 changer transitions 0/652 dead transitions. [2024-01-31 17:25:01,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 652 transitions, 14891 flow [2024-01-31 17:25:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 17:25:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 17:25:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 188 transitions. [2024-01-31 17:25:01,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-01-31 17:25:01,443 INFO L175 Difference]: Start difference. First operand has 350 places, 534 transitions, 12187 flow. Second operand 18 states and 188 transitions. [2024-01-31 17:25:01,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 652 transitions, 14891 flow [2024-01-31 17:25:01,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 652 transitions, 13872 flow, removed 283 selfloop flow, removed 13 redundant places. [2024-01-31 17:25:01,776 INFO L231 Difference]: Finished difference. Result has 358 places, 541 transitions, 11747 flow [2024-01-31 17:25:01,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11085, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11747, PETRI_PLACES=358, PETRI_TRANSITIONS=541} [2024-01-31 17:25:01,777 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 336 predicate places. [2024-01-31 17:25:01,777 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 541 transitions, 11747 flow [2024-01-31 17:25:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:01,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:01,777 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:01,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-01-31 17:25:01,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:01,980 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:01,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash -676975830, now seen corresponding path program 2 times [2024-01-31 17:25:01,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:01,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91424923] [2024-01-31 17:25:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:01,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:02,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91424923] [2024-01-31 17:25:02,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91424923] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:02,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034367382] [2024-01-31 17:25:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:25:02,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:02,144 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:02,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 17:25:02,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:25:02,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:02,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:25:02,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:02,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:02,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034367382] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:02,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:02,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-01-31 17:25:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262279098] [2024-01-31 17:25:02,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:02,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:25:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:25:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:25:02,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:02,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 541 transitions, 11747 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:02,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:02,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:02,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:03,650 INFO L124 PetriNetUnfolderBase]: 1412/2815 cut-off events. [2024-01-31 17:25:03,651 INFO L125 PetriNetUnfolderBase]: For 52238/52238 co-relation queries the response was YES. [2024-01-31 17:25:03,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24757 conditions, 2815 events. 1412/2815 cut-off events. For 52238/52238 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 18989 event pairs, 218 based on Foata normal form. 36/2851 useless extension candidates. Maximal degree in co-relation 24557. Up to 647 conditions per place. [2024-01-31 17:25:03,758 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 316 selfloop transitions, 248 changer transitions 11/576 dead transitions. [2024-01-31 17:25:03,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 576 transitions, 12916 flow [2024-01-31 17:25:03,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:25:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:25:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-01-31 17:25:03,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-01-31 17:25:03,761 INFO L175 Difference]: Start difference. First operand has 358 places, 541 transitions, 11747 flow. Second operand 11 states and 115 transitions. [2024-01-31 17:25:03,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 576 transitions, 12916 flow [2024-01-31 17:25:04,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 576 transitions, 12618 flow, removed 46 selfloop flow, removed 15 redundant places. [2024-01-31 17:25:04,060 INFO L231 Difference]: Finished difference. Result has 353 places, 522 transitions, 11529 flow [2024-01-31 17:25:04,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11139, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11529, PETRI_PLACES=353, PETRI_TRANSITIONS=522} [2024-01-31 17:25:04,061 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 331 predicate places. [2024-01-31 17:25:04,061 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 522 transitions, 11529 flow [2024-01-31 17:25:04,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:04,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:04,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:04,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-01-31 17:25:04,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-01-31 17:25:04,270 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:04,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:04,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1058588242, now seen corresponding path program 3 times [2024-01-31 17:25:04,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:04,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538939896] [2024-01-31 17:25:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:04,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:04,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:04,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538939896] [2024-01-31 17:25:04,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538939896] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:04,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240055108] [2024-01-31 17:25:04,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:25:04,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:04,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:04,435 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:04,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 17:25:04,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:25:04,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:04,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:25:04,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:04,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:04,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240055108] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:04,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:04,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-01-31 17:25:04,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853434513] [2024-01-31 17:25:04,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:04,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:25:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:25:04,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:25:04,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:04,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 522 transitions, 11529 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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) [2024-01-31 17:25:04,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:04,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:04,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:06,716 INFO L124 PetriNetUnfolderBase]: 1538/3035 cut-off events. [2024-01-31 17:25:06,716 INFO L125 PetriNetUnfolderBase]: For 59079/59079 co-relation queries the response was YES. [2024-01-31 17:25:06,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26985 conditions, 3035 events. 1538/3035 cut-off events. For 59079/59079 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20594 event pairs, 204 based on Foata normal form. 42/3077 useless extension candidates. Maximal degree in co-relation 26789. Up to 754 conditions per place. [2024-01-31 17:25:06,748 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 366 selfloop transitions, 330 changer transitions 3/700 dead transitions. [2024-01-31 17:25:06,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 700 transitions, 14744 flow [2024-01-31 17:25:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 17:25:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 17:25:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 301 transitions. [2024-01-31 17:25:06,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2024-01-31 17:25:06,750 INFO L175 Difference]: Start difference. First operand has 353 places, 522 transitions, 11529 flow. Second operand 31 states and 301 transitions. [2024-01-31 17:25:06,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 700 transitions, 14744 flow [2024-01-31 17:25:07,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 700 transitions, 14180 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-01-31 17:25:07,085 INFO L231 Difference]: Finished difference. Result has 384 places, 570 transitions, 13103 flow [2024-01-31 17:25:07,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10921, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=13103, PETRI_PLACES=384, PETRI_TRANSITIONS=570} [2024-01-31 17:25:07,086 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 362 predicate places. [2024-01-31 17:25:07,086 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 570 transitions, 13103 flow [2024-01-31 17:25:07,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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) [2024-01-31 17:25:07,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:07,086 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:07,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-01-31 17:25:07,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-01-31 17:25:07,287 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:07,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash 375260267, now seen corresponding path program 14 times [2024-01-31 17:25:07,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:07,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194100686] [2024-01-31 17:25:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:07,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194100686] [2024-01-31 17:25:07,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194100686] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58303735] [2024-01-31 17:25:07,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:25:07,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:07,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:07,501 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:07,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 17:25:07,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:25:07,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:07,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:25:07,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:07,729 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:07,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58303735] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:07,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:07,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-31 17:25:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582595217] [2024-01-31 17:25:07,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:07,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:25:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:25:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:25:07,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:07,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 570 transitions, 13103 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:07,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:07,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:07,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:09,267 INFO L124 PetriNetUnfolderBase]: 1598/3121 cut-off events. [2024-01-31 17:25:09,267 INFO L125 PetriNetUnfolderBase]: For 62333/62333 co-relation queries the response was YES. [2024-01-31 17:25:09,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28926 conditions, 3121 events. 1598/3121 cut-off events. For 62333/62333 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 21060 event pairs, 218 based on Foata normal form. 2/3123 useless extension candidates. Maximal degree in co-relation 28710. Up to 819 conditions per place. [2024-01-31 17:25:09,300 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 432 selfloop transitions, 229 changer transitions 2/664 dead transitions. [2024-01-31 17:25:09,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 664 transitions, 15708 flow [2024-01-31 17:25:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:25:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:25:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 167 transitions. [2024-01-31 17:25:09,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41854636591478694 [2024-01-31 17:25:09,302 INFO L175 Difference]: Start difference. First operand has 384 places, 570 transitions, 13103 flow. Second operand 19 states and 167 transitions. [2024-01-31 17:25:09,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 664 transitions, 15708 flow [2024-01-31 17:25:09,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 664 transitions, 15299 flow, removed 108 selfloop flow, removed 10 redundant places. [2024-01-31 17:25:09,686 INFO L231 Difference]: Finished difference. Result has 392 places, 589 transitions, 13703 flow [2024-01-31 17:25:09,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12699, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13703, PETRI_PLACES=392, PETRI_TRANSITIONS=589} [2024-01-31 17:25:09,688 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 370 predicate places. [2024-01-31 17:25:09,688 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 589 transitions, 13703 flow [2024-01-31 17:25:09,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:09,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:09,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:09,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-01-31 17:25:09,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:09,903 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:09,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1509680123, now seen corresponding path program 4 times [2024-01-31 17:25:09,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:09,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298617279] [2024-01-31 17:25:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:10,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:10,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298617279] [2024-01-31 17:25:10,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298617279] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:10,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820519551] [2024-01-31 17:25:10,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:25:10,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:10,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:10,086 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:10,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 17:25:10,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:25:10,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:10,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:25:10,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:10,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:10,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820519551] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:10,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:10,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 17:25:10,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229845654] [2024-01-31 17:25:10,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:10,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:25:10,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:10,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:25:10,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:25:10,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:10,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 589 transitions, 13703 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 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) [2024-01-31 17:25:10,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:10,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:10,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:16,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:25:17,008 INFO L124 PetriNetUnfolderBase]: 1605/3142 cut-off events. [2024-01-31 17:25:17,009 INFO L125 PetriNetUnfolderBase]: For 64906/64906 co-relation queries the response was YES. [2024-01-31 17:25:17,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29265 conditions, 3142 events. 1605/3142 cut-off events. For 64906/64906 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 21333 event pairs, 223 based on Foata normal form. 20/3162 useless extension candidates. Maximal degree in co-relation 29042. Up to 749 conditions per place. [2024-01-31 17:25:17,041 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 342 selfloop transitions, 321 changer transitions 0/664 dead transitions. [2024-01-31 17:25:17,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 664 transitions, 15435 flow [2024-01-31 17:25:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 17:25:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 17:25:17,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 201 transitions. [2024-01-31 17:25:17,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-01-31 17:25:17,042 INFO L175 Difference]: Start difference. First operand has 392 places, 589 transitions, 13703 flow. Second operand 22 states and 201 transitions. [2024-01-31 17:25:17,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 664 transitions, 15435 flow [2024-01-31 17:25:17,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 664 transitions, 15222 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-01-31 17:25:17,450 INFO L231 Difference]: Finished difference. Result has 404 places, 594 transitions, 14280 flow [2024-01-31 17:25:17,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13470, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=14280, PETRI_PLACES=404, PETRI_TRANSITIONS=594} [2024-01-31 17:25:17,451 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 382 predicate places. [2024-01-31 17:25:17,451 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 594 transitions, 14280 flow [2024-01-31 17:25:17,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 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) [2024-01-31 17:25:17,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:17,452 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:17,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-01-31 17:25:17,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:17,652 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:17,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash -694401011, now seen corresponding path program 15 times [2024-01-31 17:25:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:17,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836799978] [2024-01-31 17:25:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:17,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:17,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:17,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836799978] [2024-01-31 17:25:17,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836799978] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:17,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367926864] [2024-01-31 17:25:17,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:25:17,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:17,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:17,760 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:17,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 17:25:17,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:25:17,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:17,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:25:17,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:17,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:22,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367926864] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:22,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:22,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-01-31 17:25:22,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181885130] [2024-01-31 17:25:22,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:22,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:25:22,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:22,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:25:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=178, Unknown=1, NotChecked=0, Total=240 [2024-01-31 17:25:22,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:22,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 594 transitions, 14280 flow. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:22,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:22,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:22,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:34,360 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification. DAG size of input: 27 DAG size of output: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:25:36,060 INFO L124 PetriNetUnfolderBase]: 1610/3146 cut-off events. [2024-01-31 17:25:36,060 INFO L125 PetriNetUnfolderBase]: For 66625/66625 co-relation queries the response was YES. [2024-01-31 17:25:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30094 conditions, 3146 events. 1610/3146 cut-off events. For 66625/66625 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21287 event pairs, 222 based on Foata normal form. 4/3150 useless extension candidates. Maximal degree in co-relation 29873. Up to 831 conditions per place. [2024-01-31 17:25:36,098 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 440 selfloop transitions, 223 changer transitions 4/668 dead transitions. [2024-01-31 17:25:36,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 668 transitions, 16504 flow [2024-01-31 17:25:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:25:36,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:25:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 165 transitions. [2024-01-31 17:25:36,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41353383458646614 [2024-01-31 17:25:36,099 INFO L175 Difference]: Start difference. First operand has 404 places, 594 transitions, 14280 flow. Second operand 19 states and 165 transitions. [2024-01-31 17:25:36,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 668 transitions, 16504 flow [2024-01-31 17:25:36,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 668 transitions, 15729 flow, removed 73 selfloop flow, removed 14 redundant places. [2024-01-31 17:25:36,709 INFO L231 Difference]: Finished difference. Result has 410 places, 596 transitions, 14064 flow [2024-01-31 17:25:36,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13524, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=14064, PETRI_PLACES=410, PETRI_TRANSITIONS=596} [2024-01-31 17:25:36,711 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 388 predicate places. [2024-01-31 17:25:36,711 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 596 transitions, 14064 flow [2024-01-31 17:25:36,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:36,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:36,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:36,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-01-31 17:25:36,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:36,924 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:36,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:36,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1301564589, now seen corresponding path program 5 times [2024-01-31 17:25:36,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:36,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844943689] [2024-01-31 17:25:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:36,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:37,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844943689] [2024-01-31 17:25:37,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844943689] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:37,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385044921] [2024-01-31 17:25:37,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:25:37,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:37,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:37,166 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:37,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 17:25:37,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:25:37,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:37,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-31 17:25:37,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:37,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:25:37,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:25:38,125 INFO L349 Elim1Store]: treesize reduction 180, result has 24.1 percent of original size [2024-01-31 17:25:38,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 302 treesize of output 208 [2024-01-31 17:25:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:25:38,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:41,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385044921] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:41,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:41,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2024-01-31 17:25:41,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13756330] [2024-01-31 17:25:41,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:41,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:25:41,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:25:41,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:25:41,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:41,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 596 transitions, 14064 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:41,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:41,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:41,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:11,511 WARN L293 SmtUtils]: Spent 16.99s on a formula simplification. DAG size of input: 191 DAG size of output: 185 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:26:26,754 WARN L293 SmtUtils]: Spent 12.48s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:26:49,559 WARN L293 SmtUtils]: Spent 20.83s on a formula simplification. DAG size of input: 167 DAG size of output: 161 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:26:51,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:27:20,162 WARN L293 SmtUtils]: Spent 28.34s on a formula simplification. DAG size of input: 166 DAG size of output: 160 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:27:22,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:27:25,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:27:26,975 INFO L124 PetriNetUnfolderBase]: 2006/3843 cut-off events. [2024-01-31 17:27:26,975 INFO L125 PetriNetUnfolderBase]: For 82751/82751 co-relation queries the response was YES. [2024-01-31 17:27:27,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36480 conditions, 3843 events. 2006/3843 cut-off events. For 82751/82751 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 26734 event pairs, 98 based on Foata normal form. 6/3849 useless extension candidates. Maximal degree in co-relation 36263. Up to 975 conditions per place. [2024-01-31 17:27:27,023 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 405 selfloop transitions, 513 changer transitions 2/921 dead transitions. [2024-01-31 17:27:27,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 921 transitions, 20505 flow [2024-01-31 17:27:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-01-31 17:27:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-01-31 17:27:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 494 transitions. [2024-01-31 17:27:27,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4277056277056277 [2024-01-31 17:27:27,025 INFO L175 Difference]: Start difference. First operand has 410 places, 596 transitions, 14064 flow. Second operand 55 states and 494 transitions. [2024-01-31 17:27:27,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 921 transitions, 20505 flow [2024-01-31 17:27:27,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 921 transitions, 20154 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-01-31 17:27:27,612 INFO L231 Difference]: Finished difference. Result has 461 places, 750 transitions, 18710 flow [2024-01-31 17:27:27,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=13764, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=18710, PETRI_PLACES=461, PETRI_TRANSITIONS=750} [2024-01-31 17:27:27,613 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 439 predicate places. [2024-01-31 17:27:27,613 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 750 transitions, 18710 flow [2024-01-31 17:27:27,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:27,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:27,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:27,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-01-31 17:27:27,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-01-31 17:27:27,814 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:27,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:27,815 INFO L85 PathProgramCache]: Analyzing trace with hash -2132754805, now seen corresponding path program 6 times [2024-01-31 17:27:27,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:27,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692862786] [2024-01-31 17:27:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:27,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:27,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:27,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692862786] [2024-01-31 17:27:27,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692862786] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:27,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096254411] [2024-01-31 17:27:27,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:27:27,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:27,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:27,991 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:27,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-31 17:27:28,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:27:28,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:28,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:27:28,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:28,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:28,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096254411] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:28,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:28,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-01-31 17:27:28,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86722134] [2024-01-31 17:27:28,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:28,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:27:28,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:28,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:27:28,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:27:28,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:27:28,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 750 transitions, 18710 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:28,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:28,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:27:28,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:38,301 WARN L293 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 28 DAG size of output: 27 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:27:42,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:27:46,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:27:48,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:27:49,701 INFO L124 PetriNetUnfolderBase]: 2008/3840 cut-off events. [2024-01-31 17:27:49,702 INFO L125 PetriNetUnfolderBase]: For 90996/90996 co-relation queries the response was YES. [2024-01-31 17:27:49,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38314 conditions, 3840 events. 2008/3840 cut-off events. For 90996/90996 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26666 event pairs, 264 based on Foata normal form. 24/3864 useless extension candidates. Maximal degree in co-relation 38074. Up to 956 conditions per place. [2024-01-31 17:27:49,753 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 408 selfloop transitions, 459 changer transitions 0/868 dead transitions. [2024-01-31 17:27:49,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 868 transitions, 21221 flow [2024-01-31 17:27:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 17:27:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 17:27:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 278 transitions. [2024-01-31 17:27:49,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4270353302611367 [2024-01-31 17:27:49,755 INFO L175 Difference]: Start difference. First operand has 461 places, 750 transitions, 18710 flow. Second operand 31 states and 278 transitions. [2024-01-31 17:27:49,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 868 transitions, 21221 flow [2024-01-31 17:27:50,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 868 transitions, 20370 flow, removed 249 selfloop flow, removed 16 redundant places. [2024-01-31 17:27:50,492 INFO L231 Difference]: Finished difference. Result has 480 places, 763 transitions, 19301 flow [2024-01-31 17:27:50,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=17765, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=441, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=19301, PETRI_PLACES=480, PETRI_TRANSITIONS=763} [2024-01-31 17:27:50,493 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 458 predicate places. [2024-01-31 17:27:50,494 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 763 transitions, 19301 flow [2024-01-31 17:27:50,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:50,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:50,494 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:50,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-01-31 17:27:50,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-31 17:27:50,708 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:50,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:50,709 INFO L85 PathProgramCache]: Analyzing trace with hash 274891275, now seen corresponding path program 16 times [2024-01-31 17:27:50,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:50,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756369457] [2024-01-31 17:27:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:50,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:50,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:50,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756369457] [2024-01-31 17:27:50,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756369457] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:50,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381678779] [2024-01-31 17:27:50,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:27:50,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:50,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:50,893 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:50,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-31 17:27:51,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:27:51,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:51,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:27:51,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:51,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:51,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381678779] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:51,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:51,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 17:27:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382155693] [2024-01-31 17:27:51,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:27:51,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:27:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:27:51,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:27:51,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 763 transitions, 19301 flow. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:51,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:51,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:27:51,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:53,384 INFO L124 PetriNetUnfolderBase]: 2304/4444 cut-off events. [2024-01-31 17:27:53,384 INFO L125 PetriNetUnfolderBase]: For 113581/113581 co-relation queries the response was YES. [2024-01-31 17:27:53,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44398 conditions, 4444 events. 2304/4444 cut-off events. For 113581/113581 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 31705 event pairs, 396 based on Foata normal form. 18/4462 useless extension candidates. Maximal degree in co-relation 44170. Up to 1315 conditions per place. [2024-01-31 17:27:53,440 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 651 selfloop transitions, 266 changer transitions 0/918 dead transitions. [2024-01-31 17:27:53,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 918 transitions, 23843 flow [2024-01-31 17:27:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:27:53,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:27:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 178 transitions. [2024-01-31 17:27:53,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49859943977591037 [2024-01-31 17:27:53,441 INFO L175 Difference]: Start difference. First operand has 480 places, 763 transitions, 19301 flow. Second operand 17 states and 178 transitions. [2024-01-31 17:27:53,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 918 transitions, 23843 flow [2024-01-31 17:27:54,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 918 transitions, 23167 flow, removed 93 selfloop flow, removed 19 redundant places. [2024-01-31 17:27:54,254 INFO L231 Difference]: Finished difference. Result has 482 places, 791 transitions, 20000 flow [2024-01-31 17:27:54,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=18663, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=20000, PETRI_PLACES=482, PETRI_TRANSITIONS=791} [2024-01-31 17:27:54,255 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 460 predicate places. [2024-01-31 17:27:54,256 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 791 transitions, 20000 flow [2024-01-31 17:27:54,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:54,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:54,256 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:54,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-31 17:27:54,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-31 17:27:54,458 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:54,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash 621756293, now seen corresponding path program 17 times [2024-01-31 17:27:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158161323] [2024-01-31 17:27:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:54,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158161323] [2024-01-31 17:27:54,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158161323] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065659537] [2024-01-31 17:27:54,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:27:54,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:54,588 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:54,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-31 17:27:54,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:27:54,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:54,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:27:54,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:55,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:55,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065659537] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:55,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:27:55,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-01-31 17:27:55,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438327580] [2024-01-31 17:27:55,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:27:55,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:27:55,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:27:55,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:27:55,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:27:55,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 791 transitions, 20000 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:55,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:55,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:27:55,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:57,595 INFO L124 PetriNetUnfolderBase]: 2297/4426 cut-off events. [2024-01-31 17:27:57,596 INFO L125 PetriNetUnfolderBase]: For 108919/108919 co-relation queries the response was YES. [2024-01-31 17:27:57,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44210 conditions, 4426 events. 2297/4426 cut-off events. For 108919/108919 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31454 event pairs, 369 based on Foata normal form. 4/4430 useless extension candidates. Maximal degree in co-relation 43978. Up to 2820 conditions per place. [2024-01-31 17:27:57,661 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 673 selfloop transitions, 140 changer transitions 2/816 dead transitions. [2024-01-31 17:27:57,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 816 transitions, 22024 flow [2024-01-31 17:27:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:27:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:27:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-01-31 17:27:57,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-31 17:27:57,662 INFO L175 Difference]: Start difference. First operand has 482 places, 791 transitions, 20000 flow. Second operand 6 states and 60 transitions. [2024-01-31 17:27:57,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 816 transitions, 22024 flow [2024-01-31 17:27:58,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 816 transitions, 21478 flow, removed 73 selfloop flow, removed 14 redundant places. [2024-01-31 17:27:58,614 INFO L231 Difference]: Finished difference. Result has 472 places, 786 transitions, 19622 flow [2024-01-31 17:27:58,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=19360, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=19622, PETRI_PLACES=472, PETRI_TRANSITIONS=786} [2024-01-31 17:27:58,615 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 450 predicate places. [2024-01-31 17:27:58,615 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 786 transitions, 19622 flow [2024-01-31 17:27:58,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:58,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:58,616 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:58,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-01-31 17:27:58,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-31 17:27:58,829 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:58,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:58,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1111743997, now seen corresponding path program 18 times [2024-01-31 17:27:58,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:58,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736672619] [2024-01-31 17:27:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:58,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:58,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:58,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736672619] [2024-01-31 17:27:58,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736672619] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:58,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362722737] [2024-01-31 17:27:58,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:27:58,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:58,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:58,953 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:58,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-31 17:27:59,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:27:59,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:59,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:27:59,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:59,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:28:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:28:03,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362722737] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:28:03,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:28:03,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2024-01-31 17:28:03,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470851463] [2024-01-31 17:28:03,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:28:03,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:28:03,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:28:03,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:28:03,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2024-01-31 17:28:03,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:28:03,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 786 transitions, 19622 flow. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:28:03,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:28:03,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:28:03,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:28:12,721 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification. DAG size of input: 17 DAG size of output: 18 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:28:16,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:28:22,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:28:26,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:28:30,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:28:32,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:28:36,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:28:37,514 INFO L124 PetriNetUnfolderBase]: 2413/4624 cut-off events. [2024-01-31 17:28:37,515 INFO L125 PetriNetUnfolderBase]: For 116591/116591 co-relation queries the response was YES. [2024-01-31 17:28:37,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45926 conditions, 4624 events. 2413/4624 cut-off events. For 116591/116591 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33115 event pairs, 474 based on Foata normal form. 6/4630 useless extension candidates. Maximal degree in co-relation 45696. Up to 1310 conditions per place. [2024-01-31 17:28:37,579 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 646 selfloop transitions, 277 changer transitions 6/930 dead transitions. [2024-01-31 17:28:37,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 930 transitions, 23633 flow [2024-01-31 17:28:37,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:28:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:28:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 218 transitions. [2024-01-31 17:28:37,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844797178130511 [2024-01-31 17:28:37,580 INFO L175 Difference]: Start difference. First operand has 472 places, 786 transitions, 19622 flow. Second operand 27 states and 218 transitions. [2024-01-31 17:28:37,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 930 transitions, 23633 flow [2024-01-31 17:28:38,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 930 transitions, 23549 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:28:38,518 INFO L231 Difference]: Finished difference. Result has 498 places, 816 transitions, 20979 flow [2024-01-31 17:28:38,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=19512, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20979, PETRI_PLACES=498, PETRI_TRANSITIONS=816} [2024-01-31 17:28:38,519 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 476 predicate places. [2024-01-31 17:28:38,519 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 816 transitions, 20979 flow [2024-01-31 17:28:38,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:28:38,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:28:38,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:28:38,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-01-31 17:28:38,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:28:38,720 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:28:38,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:28:38,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2014825842, now seen corresponding path program 11 times [2024-01-31 17:28:38,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:28:38,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596583810] [2024-01-31 17:28:38,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:28:38,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:28:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:28:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:28:38,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:28:38,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596583810] [2024-01-31 17:28:38,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596583810] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:28:38,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111745060] [2024-01-31 17:28:38,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:28:38,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:28:38,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:28:38,876 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:28:38,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-31 17:28:39,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:28:39,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:28:39,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:28:39,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:28:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:28:39,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:28:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:28:39,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111745060] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:28:39,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:28:39,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-31 17:28:39,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943803508] [2024-01-31 17:28:39,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:28:39,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:28:39,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:28:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:28:39,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:28:39,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:28:39,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 816 transitions, 20979 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:28:39,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:28:39,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:28:39,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:28:45,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:28:49,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:28:51,477 INFO L124 PetriNetUnfolderBase]: 2434/4707 cut-off events. [2024-01-31 17:28:51,477 INFO L125 PetriNetUnfolderBase]: For 124916/124916 co-relation queries the response was YES. [2024-01-31 17:28:51,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47345 conditions, 4707 events. 2434/4707 cut-off events. For 124916/124916 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 34315 event pairs, 596 based on Foata normal form. 40/4747 useless extension candidates. Maximal degree in co-relation 47110. Up to 2509 conditions per place. [2024-01-31 17:28:51,552 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 663 selfloop transitions, 273 changer transitions 0/937 dead transitions. [2024-01-31 17:28:51,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 937 transitions, 23430 flow [2024-01-31 17:28:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-31 17:28:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-31 17:28:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 284 transitions. [2024-01-31 17:28:51,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-01-31 17:28:51,553 INFO L175 Difference]: Start difference. First operand has 498 places, 816 transitions, 20979 flow. Second operand 32 states and 284 transitions. [2024-01-31 17:28:51,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 937 transitions, 23430 flow [2024-01-31 17:28:52,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 937 transitions, 23071 flow, removed 61 selfloop flow, removed 17 redundant places. [2024-01-31 17:28:52,688 INFO L231 Difference]: Finished difference. Result has 512 places, 828 transitions, 21432 flow [2024-01-31 17:28:52,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20543, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21432, PETRI_PLACES=512, PETRI_TRANSITIONS=828} [2024-01-31 17:28:52,689 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 490 predicate places. [2024-01-31 17:28:52,689 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 828 transitions, 21432 flow [2024-01-31 17:28:52,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:28:52,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:28:52,689 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:28:52,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-01-31 17:28:52,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-01-31 17:28:52,894 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:28:52,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:28:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1979073863, now seen corresponding path program 19 times [2024-01-31 17:28:52,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:28:52,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786362963] [2024-01-31 17:28:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:28:52,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:28:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:28:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:28:53,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:28:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786362963] [2024-01-31 17:28:53,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786362963] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:28:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543933180] [2024-01-31 17:28:53,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:28:53,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:28:53,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:28:53,016 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:28:53,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-31 17:28:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:28:53,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:28:53,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:28:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:28:53,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:28:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:28:53,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543933180] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:28:53,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:28:53,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:28:53,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419805367] [2024-01-31 17:28:53,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:28:53,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:28:53,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:28:53,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:28:53,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:28:53,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:28:53,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 828 transitions, 21432 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:28:53,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:28:53,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:28:53,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:28:59,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:03,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:05,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:09,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:10,757 INFO L124 PetriNetUnfolderBase]: 2521/4851 cut-off events. [2024-01-31 17:29:10,757 INFO L125 PetriNetUnfolderBase]: For 130144/130144 co-relation queries the response was YES. [2024-01-31 17:29:10,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49325 conditions, 4851 events. 2521/4851 cut-off events. For 130144/130144 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 35309 event pairs, 555 based on Foata normal form. 4/4855 useless extension candidates. Maximal degree in co-relation 49090. Up to 2325 conditions per place. [2024-01-31 17:29:10,833 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 657 selfloop transitions, 260 changer transitions 9/927 dead transitions. [2024-01-31 17:29:10,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 927 transitions, 24971 flow [2024-01-31 17:29:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 17:29:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 17:29:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 148 transitions. [2024-01-31 17:29:10,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-01-31 17:29:10,834 INFO L175 Difference]: Start difference. First operand has 512 places, 828 transitions, 21432 flow. Second operand 18 states and 148 transitions. [2024-01-31 17:29:10,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 927 transitions, 24971 flow [2024-01-31 17:29:11,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 927 transitions, 24508 flow, removed 83 selfloop flow, removed 20 redundant places. [2024-01-31 17:29:12,016 INFO L231 Difference]: Finished difference. Result has 514 places, 849 transitions, 22358 flow [2024-01-31 17:29:12,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20951, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22358, PETRI_PLACES=514, PETRI_TRANSITIONS=849} [2024-01-31 17:29:12,018 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 492 predicate places. [2024-01-31 17:29:12,018 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 849 transitions, 22358 flow [2024-01-31 17:29:12,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:12,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:12,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:12,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-01-31 17:29:12,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:12,219 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:29:12,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:12,219 INFO L85 PathProgramCache]: Analyzing trace with hash -799337149, now seen corresponding path program 7 times [2024-01-31 17:29:12,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:12,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001015283] [2024-01-31 17:29:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:12,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:29:12,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:12,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001015283] [2024-01-31 17:29:12,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001015283] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:12,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26933655] [2024-01-31 17:29:12,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:29:12,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:12,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:12,394 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:29:12,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-31 17:29:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:12,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-31 17:29:12,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:29:12,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:29:13,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26933655] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:13,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:13,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-31 17:29:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635921390] [2024-01-31 17:29:13,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:13,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:29:13,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:29:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:29:13,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:29:13,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 849 transitions, 22358 flow. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:13,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:13,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:29:13,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:18,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:22,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:26,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:30,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:34,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:35,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:39,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:43,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:29:49,502 INFO L124 PetriNetUnfolderBase]: 2643/5038 cut-off events. [2024-01-31 17:29:49,502 INFO L125 PetriNetUnfolderBase]: For 143370/143370 co-relation queries the response was YES. [2024-01-31 17:29:49,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51775 conditions, 5038 events. 2643/5038 cut-off events. For 143370/143370 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 36764 event pairs, 321 based on Foata normal form. 40/5078 useless extension candidates. Maximal degree in co-relation 51537. Up to 1354 conditions per place. [2024-01-31 17:29:49,580 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 501 selfloop transitions, 550 changer transitions 0/1052 dead transitions. [2024-01-31 17:29:49,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 1052 transitions, 26961 flow [2024-01-31 17:29:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 17:29:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 17:29:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 339 transitions. [2024-01-31 17:29:49,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424812030075188 [2024-01-31 17:29:49,581 INFO L175 Difference]: Start difference. First operand has 514 places, 849 transitions, 22358 flow. Second operand 38 states and 339 transitions. [2024-01-31 17:29:49,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 1052 transitions, 26961 flow [2024-01-31 17:29:50,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 1052 transitions, 26143 flow, removed 51 selfloop flow, removed 14 redundant places. [2024-01-31 17:29:50,765 INFO L231 Difference]: Finished difference. Result has 542 places, 926 transitions, 25207 flow [2024-01-31 17:29:50,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21506, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=25207, PETRI_PLACES=542, PETRI_TRANSITIONS=926} [2024-01-31 17:29:50,766 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 520 predicate places. [2024-01-31 17:29:50,766 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 926 transitions, 25207 flow [2024-01-31 17:29:50,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:50,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:50,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:50,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:50,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:50,968 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:29:50,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:50,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1570805867, now seen corresponding path program 8 times [2024-01-31 17:29:50,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:50,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394631630] [2024-01-31 17:29:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:29:51,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394631630] [2024-01-31 17:29:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394631630] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848290249] [2024-01-31 17:29:51,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:29:51,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:51,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:51,149 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:29:51,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-31 17:29:51,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:29:51,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:51,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:29:51,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:29:51,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:29:51,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848290249] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:51,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:51,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 17:29:51,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521291747] [2024-01-31 17:29:51,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:51,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:29:51,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:51,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:29:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:29:51,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:29:51,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 926 transitions, 25207 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 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) [2024-01-31 17:29:51,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:51,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:29:51,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:29:54,532 INFO L124 PetriNetUnfolderBase]: 2724/5200 cut-off events. [2024-01-31 17:29:54,533 INFO L125 PetriNetUnfolderBase]: For 163339/163339 co-relation queries the response was YES. [2024-01-31 17:29:54,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54709 conditions, 5200 events. 2724/5200 cut-off events. For 163339/163339 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 38227 event pairs, 909 based on Foata normal form. 12/5212 useless extension candidates. Maximal degree in co-relation 54461. Up to 4208 conditions per place. [2024-01-31 17:29:54,613 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 855 selfloop transitions, 167 changer transitions 0/1023 dead transitions. [2024-01-31 17:29:54,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1023 transitions, 28553 flow [2024-01-31 17:29:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 17:29:54,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 17:29:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 193 transitions. [2024-01-31 17:29:54,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-01-31 17:29:54,615 INFO L175 Difference]: Start difference. First operand has 542 places, 926 transitions, 25207 flow. Second operand 22 states and 193 transitions. [2024-01-31 17:29:54,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1023 transitions, 28553 flow [2024-01-31 17:29:56,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 1023 transitions, 28071 flow, removed 164 selfloop flow, removed 14 redundant places. [2024-01-31 17:29:56,058 INFO L231 Difference]: Finished difference. Result has 552 places, 960 transitions, 26197 flow [2024-01-31 17:29:56,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=24674, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=26197, PETRI_PLACES=552, PETRI_TRANSITIONS=960} [2024-01-31 17:29:56,060 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 530 predicate places. [2024-01-31 17:29:56,060 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 960 transitions, 26197 flow [2024-01-31 17:29:56,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 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) [2024-01-31 17:29:56,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:29:56,060 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:29:56,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-01-31 17:29:56,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-01-31 17:29:56,277 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:29:56,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:29:56,277 INFO L85 PathProgramCache]: Analyzing trace with hash 872651953, now seen corresponding path program 9 times [2024-01-31 17:29:56,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:29:56,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412076457] [2024-01-31 17:29:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:29:56,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:29:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:29:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:29:56,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:29:56,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412076457] [2024-01-31 17:29:56,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412076457] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:29:56,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089752678] [2024-01-31 17:29:56,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:29:56,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:29:56,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:29:56,611 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:29:56,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-31 17:29:56,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:29:56,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:29:56,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:29:56,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:29:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:29:56,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:29:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:29:57,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089752678] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:29:57,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:29:57,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 17:29:57,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673789719] [2024-01-31 17:29:57,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:29:57,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:29:57,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:29:57,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:29:57,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:29:57,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:29:57,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 960 transitions, 26197 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:29:57,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:29:57,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:29:57,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:30:00,123 INFO L124 PetriNetUnfolderBase]: 2732/5188 cut-off events. [2024-01-31 17:30:00,123 INFO L125 PetriNetUnfolderBase]: For 162932/162932 co-relation queries the response was YES. [2024-01-31 17:30:00,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54662 conditions, 5188 events. 2732/5188 cut-off events. For 162932/162932 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37890 event pairs, 909 based on Foata normal form. 8/5196 useless extension candidates. Maximal degree in co-relation 54411. Up to 4214 conditions per place. [2024-01-31 17:30:00,195 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 850 selfloop transitions, 161 changer transitions 0/1012 dead transitions. [2024-01-31 17:30:00,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1012 transitions, 28547 flow [2024-01-31 17:30:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-01-31 17:30:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-01-31 17:30:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 164 transitions. [2024-01-31 17:30:00,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-01-31 17:30:00,196 INFO L175 Difference]: Start difference. First operand has 552 places, 960 transitions, 26197 flow. Second operand 18 states and 164 transitions. [2024-01-31 17:30:00,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1012 transitions, 28547 flow [2024-01-31 17:30:01,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1012 transitions, 28152 flow, removed 100 selfloop flow, removed 16 redundant places. [2024-01-31 17:30:01,554 INFO L231 Difference]: Finished difference. Result has 555 places, 963 transitions, 26264 flow [2024-01-31 17:30:01,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25650, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=26264, PETRI_PLACES=555, PETRI_TRANSITIONS=963} [2024-01-31 17:30:01,555 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 533 predicate places. [2024-01-31 17:30:01,555 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 963 transitions, 26264 flow [2024-01-31 17:30:01,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:30:01,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:30:01,555 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:30:01,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-01-31 17:30:01,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-01-31 17:30:01,756 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:30:01,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:30:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1417318371, now seen corresponding path program 20 times [2024-01-31 17:30:01,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:30:01,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33586374] [2024-01-31 17:30:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:30:01,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:30:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:30:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:30:01,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:30:01,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33586374] [2024-01-31 17:30:01,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33586374] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:30:01,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819739345] [2024-01-31 17:30:01,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:30:01,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:30:01,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:30:01,970 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:30:01,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-31 17:30:02,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:30:02,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:30:02,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-31 17:30:02,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:30:02,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:30:02,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:30:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:30:02,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:30:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:30:05,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819739345] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:30:05,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:30:05,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 8] total 22 [2024-01-31 17:30:05,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630001232] [2024-01-31 17:30:05,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:30:05,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:30:05,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:30:05,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:30:05,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:30:05,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:30:05,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 963 transitions, 26264 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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) [2024-01-31 17:30:05,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:30:05,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:30:05,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:30:11,875 WARN L293 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 114 DAG size of output: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:30:17,971 WARN L293 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 111 DAG size of output: 99 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:30:19,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:30:37,022 WARN L293 SmtUtils]: Spent 11.20s on a formula simplification. DAG size of input: 125 DAG size of output: 122 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:30:44,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:30:46,256 INFO L124 PetriNetUnfolderBase]: 2810/5330 cut-off events. [2024-01-31 17:30:46,256 INFO L125 PetriNetUnfolderBase]: For 165179/165179 co-relation queries the response was YES. [2024-01-31 17:30:46,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56467 conditions, 5330 events. 2810/5330 cut-off events. For 165179/165179 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39099 event pairs, 312 based on Foata normal form. 10/5340 useless extension candidates. Maximal degree in co-relation 56215. Up to 2475 conditions per place. [2024-01-31 17:30:46,344 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 755 selfloop transitions, 361 changer transitions 8/1125 dead transitions. [2024-01-31 17:30:46,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 1125 transitions, 30941 flow [2024-01-31 17:30:46,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-01-31 17:30:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-01-31 17:30:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 373 transitions. [2024-01-31 17:30:46,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37003968253968256 [2024-01-31 17:30:46,346 INFO L175 Difference]: Start difference. First operand has 555 places, 963 transitions, 26264 flow. Second operand 48 states and 373 transitions. [2024-01-31 17:30:46,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 1125 transitions, 30941 flow [2024-01-31 17:30:47,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 1125 transitions, 30677 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-01-31 17:30:47,872 INFO L231 Difference]: Finished difference. Result has 594 places, 1011 transitions, 28566 flow [2024-01-31 17:30:47,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=25768, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=28566, PETRI_PLACES=594, PETRI_TRANSITIONS=1011} [2024-01-31 17:30:47,873 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 572 predicate places. [2024-01-31 17:30:47,873 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 1011 transitions, 28566 flow [2024-01-31 17:30:47,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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) [2024-01-31 17:30:47,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:30:47,873 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:30:47,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-01-31 17:30:48,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-01-31 17:30:48,074 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:30:48,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:30:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash 12964971, now seen corresponding path program 21 times [2024-01-31 17:30:48,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:30:48,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110147032] [2024-01-31 17:30:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:30:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:30:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:30:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:30:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:30:48,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110147032] [2024-01-31 17:30:48,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110147032] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:30:48,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77329920] [2024-01-31 17:30:48,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:30:48,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:30:48,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:30:48,190 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:30:48,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-31 17:30:48,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:30:48,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:30:48,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:30:48,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:30:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:30:48,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:30:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:30:48,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77329920] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:30:48,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:30:48,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 17:30:48,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001435639] [2024-01-31 17:30:48,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:30:48,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:30:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:30:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:30:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:30:48,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:30:48,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 1011 transitions, 28566 flow. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:30:48,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:30:48,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:30:48,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:30:51,291 INFO L124 PetriNetUnfolderBase]: 2877/5464 cut-off events. [2024-01-31 17:30:51,291 INFO L125 PetriNetUnfolderBase]: For 184923/184923 co-relation queries the response was YES. [2024-01-31 17:30:51,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58827 conditions, 5464 events. 2877/5464 cut-off events. For 184923/184923 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 40284 event pairs, 767 based on Foata normal form. 18/5482 useless extension candidates. Maximal degree in co-relation 58568. Up to 2794 conditions per place. [2024-01-31 17:30:51,374 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 860 selfloop transitions, 218 changer transitions 0/1079 dead transitions. [2024-01-31 17:30:51,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 1079 transitions, 31430 flow [2024-01-31 17:30:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:30:51,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:30:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 152 transitions. [2024-01-31 17:30:51,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-01-31 17:30:51,375 INFO L175 Difference]: Start difference. First operand has 594 places, 1011 transitions, 28566 flow. Second operand 16 states and 152 transitions. [2024-01-31 17:30:51,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 1079 transitions, 31430 flow [2024-01-31 17:30:53,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1079 transitions, 30536 flow, removed 158 selfloop flow, removed 36 redundant places. [2024-01-31 17:30:53,054 INFO L231 Difference]: Finished difference. Result has 571 places, 1013 transitions, 28260 flow [2024-01-31 17:30:53,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27454, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=28260, PETRI_PLACES=571, PETRI_TRANSITIONS=1013} [2024-01-31 17:30:53,055 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 549 predicate places. [2024-01-31 17:30:53,056 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 1013 transitions, 28260 flow [2024-01-31 17:30:53,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:30:53,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:30:53,056 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:30:53,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-01-31 17:30:53,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-31 17:30:53,257 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:30:53,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:30:53,257 INFO L85 PathProgramCache]: Analyzing trace with hash -47801643, now seen corresponding path program 10 times [2024-01-31 17:30:53,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:30:53,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861598497] [2024-01-31 17:30:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:30:53,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:30:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:30:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:30:53,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:30:53,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861598497] [2024-01-31 17:30:53,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861598497] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:30:53,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386238421] [2024-01-31 17:30:53,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:30:53,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:30:53,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:30:53,497 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:30:53,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-31 17:30:53,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:30:53,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:30:53,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-31 17:30:53,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:30:53,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:30:53,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:30:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:30:54,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:30:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:30:59,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386238421] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:30:59,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:30:59,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2024-01-31 17:30:59,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076815710] [2024-01-31 17:30:59,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:30:59,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:30:59,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:30:59,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:30:59,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:30:59,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:30:59,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 1013 transitions, 28260 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:30:59,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:30:59,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:30:59,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:31:03,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:31:06,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:31:16,861 WARN L293 SmtUtils]: Spent 6.59s on a formula simplification that was a NOOP. DAG size: 214 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:31:22,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:31:42,927 WARN L293 SmtUtils]: Spent 18.58s on a formula simplification that was a NOOP. DAG size: 214 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:31:49,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:31:53,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:32:02,773 WARN L293 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 214 DAG size of output: 208 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:32:04,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:32:11,463 WARN L293 SmtUtils]: Spent 5.85s on a formula simplification that was a NOOP. DAG size: 197 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:32:30,684 WARN L293 SmtUtils]: Spent 18.81s on a formula simplification. DAG size of input: 214 DAG size of output: 210 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:32:37,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:32:46,075 WARN L293 SmtUtils]: Spent 8.84s on a formula simplification. DAG size of input: 179 DAG size of output: 173 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:32:55,676 WARN L293 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 154 DAG size of output: 148 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:32:58,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:33:00,752 INFO L124 PetriNetUnfolderBase]: 3127/6039 cut-off events. [2024-01-31 17:33:00,752 INFO L125 PetriNetUnfolderBase]: For 197797/197797 co-relation queries the response was YES. [2024-01-31 17:33:00,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63931 conditions, 6039 events. 3127/6039 cut-off events. For 197797/197797 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 46510 event pairs, 142 based on Foata normal form. 16/6055 useless extension candidates. Maximal degree in co-relation 63674. Up to 2655 conditions per place. [2024-01-31 17:33:00,859 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 621 selfloop transitions, 681 changer transitions 20/1323 dead transitions. [2024-01-31 17:33:00,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 1323 transitions, 35097 flow [2024-01-31 17:33:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-01-31 17:33:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-01-31 17:33:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 528 transitions. [2024-01-31 17:33:00,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261501210653753 [2024-01-31 17:33:00,861 INFO L175 Difference]: Start difference. First operand has 571 places, 1013 transitions, 28260 flow. Second operand 59 states and 528 transitions. [2024-01-31 17:33:00,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 1323 transitions, 35097 flow [2024-01-31 17:33:03,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 1323 transitions, 34700 flow, removed 30 selfloop flow, removed 12 redundant places. [2024-01-31 17:33:03,089 INFO L231 Difference]: Finished difference. Result has 628 places, 1129 transitions, 33445 flow [2024-01-31 17:33:03,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27816, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=33445, PETRI_PLACES=628, PETRI_TRANSITIONS=1129} [2024-01-31 17:33:03,091 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 606 predicate places. [2024-01-31 17:33:03,091 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 1129 transitions, 33445 flow [2024-01-31 17:33:03,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:33:03,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:33:03,091 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:33:03,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-01-31 17:33:03,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:33:03,292 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:33:03,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:33:03,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2140404243, now seen corresponding path program 22 times [2024-01-31 17:33:03,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:33:03,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124892686] [2024-01-31 17:33:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:33:03,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:33:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:33:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:33:03,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:33:03,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124892686] [2024-01-31 17:33:03,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124892686] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:33:03,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089693112] [2024-01-31 17:33:03,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:33:03,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:33:03,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:33:03,413 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:33:03,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-31 17:33:03,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:33:03,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:33:03,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:33:03,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:33:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:33:03,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:33:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:33:03,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089693112] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:33:03,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:33:03,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2024-01-31 17:33:03,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491469410] [2024-01-31 17:33:03,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:33:03,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:33:03,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:33:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:33:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:33:03,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:33:03,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 1129 transitions, 33445 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 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) [2024-01-31 17:33:03,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:33:03,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:33:03,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:33:12,734 WARN L293 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 25 DAG size of output: 22 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:33:17,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-01-31 17:33:20,141 INFO L124 PetriNetUnfolderBase]: 3090/5955 cut-off events. [2024-01-31 17:33:20,141 INFO L125 PetriNetUnfolderBase]: For 221330/221330 co-relation queries the response was YES. [2024-01-31 17:33:20,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66860 conditions, 5955 events. 3090/5955 cut-off events. For 221330/221330 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 45368 event pairs, 791 based on Foata normal form. 6/5961 useless extension candidates. Maximal degree in co-relation 66604. Up to 3348 conditions per place. [2024-01-31 17:33:20,255 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 950 selfloop transitions, 213 changer transitions 17/1181 dead transitions. [2024-01-31 17:33:20,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 1181 transitions, 36532 flow [2024-01-31 17:33:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:33:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:33:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 95 transitions. [2024-01-31 17:33:20,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-01-31 17:33:20,261 INFO L175 Difference]: Start difference. First operand has 628 places, 1129 transitions, 33445 flow. Second operand 12 states and 95 transitions. [2024-01-31 17:33:20,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 1181 transitions, 36532 flow [2024-01-31 17:33:22,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 1181 transitions, 35736 flow, removed 268 selfloop flow, removed 30 redundant places. [2024-01-31 17:33:22,945 INFO L231 Difference]: Finished difference. Result has 609 places, 1116 transitions, 32676 flow [2024-01-31 17:33:22,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32632, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=32676, PETRI_PLACES=609, PETRI_TRANSITIONS=1116} [2024-01-31 17:33:22,946 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 587 predicate places. [2024-01-31 17:33:22,947 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1116 transitions, 32676 flow [2024-01-31 17:33:22,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 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) [2024-01-31 17:33:22,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:33:22,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:33:22,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-01-31 17:33:23,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-31 17:33:23,148 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:33:23,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:33:23,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1044933275, now seen corresponding path program 11 times [2024-01-31 17:33:23,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:33:23,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227741787] [2024-01-31 17:33:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:33:23,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:33:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:33:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:33:23,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:33:23,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227741787] [2024-01-31 17:33:23,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227741787] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:33:23,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323053099] [2024-01-31 17:33:23,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:33:23,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:33:23,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:33:23,348 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:33:23,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-31 17:33:23,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:33:23,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:33:23,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 52 conjunts are in the unsatisfiable core [2024-01-31 17:33:23,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:33:23,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:33:23,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:33:24,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:33:24,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:33:38,105 WARN L293 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 105 DAG size of output: 103 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:33:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:33:38,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323053099] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:33:38,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:33:38,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2024-01-31 17:33:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509881361] [2024-01-31 17:33:38,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:33:38,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:33:38,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:33:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:33:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:33:38,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:33:38,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1116 transitions, 32676 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:33:38,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:33:38,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:33:38,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:33:58,964 WARN L293 SmtUtils]: Spent 12.65s on a formula simplification. DAG size of input: 136 DAG size of output: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:34:31,949 WARN L293 SmtUtils]: Spent 27.45s on a formula simplification. DAG size of input: 189 DAG size of output: 186 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:34:46,970 WARN L293 SmtUtils]: Spent 13.40s on a formula simplification. DAG size of input: 135 DAG size of output: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:35:14,670 WARN L293 SmtUtils]: Spent 23.51s on a formula simplification. DAG size of input: 164 DAG size of output: 158 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:35:18,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:35:20,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:35:22,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:35:51,981 WARN L293 SmtUtils]: Spent 28.04s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:35:56,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:35:59,707 INFO L124 PetriNetUnfolderBase]: 3102/5997 cut-off events. [2024-01-31 17:35:59,707 INFO L125 PetriNetUnfolderBase]: For 219759/219759 co-relation queries the response was YES. [2024-01-31 17:35:59,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65903 conditions, 5997 events. 3102/5997 cut-off events. For 219759/219759 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 46135 event pairs, 148 based on Foata normal form. 14/6011 useless extension candidates. Maximal degree in co-relation 65638. Up to 3235 conditions per place. [2024-01-31 17:35:59,798 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 653 selfloop transitions, 577 changer transitions 13/1244 dead transitions. [2024-01-31 17:35:59,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 635 places, 1244 transitions, 36157 flow [2024-01-31 17:35:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-31 17:35:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-31 17:35:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 337 transitions. [2024-01-31 17:35:59,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914053426248548 [2024-01-31 17:35:59,800 INFO L175 Difference]: Start difference. First operand has 609 places, 1116 transitions, 32676 flow. Second operand 41 states and 337 transitions. [2024-01-31 17:35:59,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 635 places, 1244 transitions, 36157 flow [2024-01-31 17:36:01,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1244 transitions, 35248 flow, removed 46 selfloop flow, removed 11 redundant places. [2024-01-31 17:36:01,978 INFO L231 Difference]: Finished difference. Result has 631 places, 1129 transitions, 33411 flow [2024-01-31 17:36:01,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=31707, PETRI_DIFFERENCE_MINUEND_PLACES=584, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=33411, PETRI_PLACES=631, PETRI_TRANSITIONS=1129} [2024-01-31 17:36:01,979 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 609 predicate places. [2024-01-31 17:36:01,979 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 1129 transitions, 33411 flow [2024-01-31 17:36:01,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:36:01,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:36:01,980 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:36:01,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-01-31 17:36:02,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:36:02,188 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:36:02,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:36:02,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1629265679, now seen corresponding path program 23 times [2024-01-31 17:36:02,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:36:02,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443584922] [2024-01-31 17:36:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:36:02,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:36:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:36:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:36:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:36:02,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443584922] [2024-01-31 17:36:02,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443584922] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:36:02,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219698757] [2024-01-31 17:36:02,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:36:02,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:36:02,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:36:02,337 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:36:02,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-01-31 17:36:02,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:36:02,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:36:02,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:36:02,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:36:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:36:02,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:36:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:36:02,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219698757] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:36:02,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:36:02,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-01-31 17:36:02,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804197317] [2024-01-31 17:36:02,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:36:02,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:36:02,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:36:02,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:36:02,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:36:02,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:36:02,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 1129 transitions, 33411 flow. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:36:02,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:36:02,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:36:02,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:36:07,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:36:09,925 INFO L124 PetriNetUnfolderBase]: 3098/5994 cut-off events. [2024-01-31 17:36:09,926 INFO L125 PetriNetUnfolderBase]: For 227651/227651 co-relation queries the response was YES. [2024-01-31 17:36:10,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66631 conditions, 5994 events. 3098/5994 cut-off events. For 227651/227651 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 46154 event pairs, 697 based on Foata normal form. 12/6006 useless extension candidates. Maximal degree in co-relation 66360. Up to 4232 conditions per place. [2024-01-31 17:36:10,034 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 862 selfloop transitions, 314 changer transitions 0/1177 dead transitions. [2024-01-31 17:36:10,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 1177 transitions, 36122 flow [2024-01-31 17:36:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:36:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:36:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 138 transitions. [2024-01-31 17:36:10,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-01-31 17:36:10,035 INFO L175 Difference]: Start difference. First operand has 631 places, 1129 transitions, 33411 flow. Second operand 16 states and 138 transitions. [2024-01-31 17:36:10,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 1177 transitions, 36122 flow [2024-01-31 17:36:12,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1177 transitions, 35210 flow, removed 125 selfloop flow, removed 35 redundant places. [2024-01-31 17:36:12,821 INFO L231 Difference]: Finished difference. Result has 611 places, 1138 transitions, 33554 flow [2024-01-31 17:36:12,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32180, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=33554, PETRI_PLACES=611, PETRI_TRANSITIONS=1138} [2024-01-31 17:36:12,823 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 589 predicate places. [2024-01-31 17:36:12,823 INFO L495 AbstractCegarLoop]: Abstraction has has 611 places, 1138 transitions, 33554 flow [2024-01-31 17:36:12,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:36:12,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:36:12,824 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:36:12,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-01-31 17:36:13,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-01-31 17:36:13,034 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:36:13,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:36:13,034 INFO L85 PathProgramCache]: Analyzing trace with hash 643489771, now seen corresponding path program 12 times [2024-01-31 17:36:13,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:36:13,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491919025] [2024-01-31 17:36:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:36:13,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:36:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:36:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:36:13,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:36:13,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491919025] [2024-01-31 17:36:13,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491919025] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:36:13,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115924849] [2024-01-31 17:36:13,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:36:13,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:36:13,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:36:13,253 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:36:13,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-01-31 17:36:13,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:36:13,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:36:13,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-31 17:36:13,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:36:13,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:36:13,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:36:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:36:14,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:36:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:36:18,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115924849] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:36:18,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:36:18,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 25 [2024-01-31 17:36:18,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925847822] [2024-01-31 17:36:18,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:36:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-31 17:36:18,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:36:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-31 17:36:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2024-01-31 17:36:18,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:36:18,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 611 places, 1138 transitions, 33554 flow. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:36:18,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:36:18,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:36:18,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:36:46,388 WARN L293 SmtUtils]: Spent 20.15s on a formula simplification. DAG size of input: 192 DAG size of output: 185 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-01-31 17:37:02,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:37:14,268 WARN L293 SmtUtils]: Spent 7.71s on a formula simplification. DAG size of input: 104 DAG size of output: 100 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15