./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-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/popl20-queue-add-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/popl20-queue-add-3.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-queue-add-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 17:17:35,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:17:35,766 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:17:35,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:17:35,772 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:17:35,790 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:17:35,790 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:17:35,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:17:35,791 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:17:35,794 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:17:35,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:17:35,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:17:35,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:17:35,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:17:35,796 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:17:35,796 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:17:35,796 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:17:35,796 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:17:35,796 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:17:35,797 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:17:35,797 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:17:35,797 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:17:35,797 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:17:35,797 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:17:35,797 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:17:35,798 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:17:35,798 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:17:35,798 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:17:35,798 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:17:35,798 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:17:35,799 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:17:35,799 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:17:35,799 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:17:35,800 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:17:35,800 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:17:35,800 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:17:35,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:17:35,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:17:35,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:17:35,800 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:17:35,800 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:17:35,801 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:17:35,801 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:17:35,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:17:36,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:17:36,015 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:17:36,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:17:36,017 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:17:36,018 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:17:36,018 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2024-01-31 17:17:36,928 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:17:37,103 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:17:37,104 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c [2024-01-31 17:17:37,114 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952e4047b/2fde0fc7b1024eae82608b0b58c6a623/FLAG55da59a89 [2024-01-31 17:17:37,127 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952e4047b/2fde0fc7b1024eae82608b0b58c6a623 [2024-01-31 17:17:37,129 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:17:37,129 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:17:37,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/popl20-queue-add-3.wvr.yml/witness.yml [2024-01-31 17:17:37,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:17:37,278 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:17:37,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:17:37,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:17:37,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:17:37,286 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:17:37" (1/2) ... [2024-01-31 17:17:37,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd64bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:37, skipping insertion in model container [2024-01-31 17:17:37,287 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:17:37" (1/2) ... [2024-01-31 17:17:37,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@38ada33b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:17:37, skipping insertion in model container [2024-01-31 17:17:37,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:17:37" (2/2) ... [2024-01-31 17:17:37,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd64bc2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:17:37, skipping insertion in model container [2024-01-31 17:17:37,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:17:37" (2/2) ... [2024-01-31 17:17:37,289 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:17:37,374 INFO L93 nessWitnessExtractor]: Witness did not contain any usable entries. [2024-01-31 17:17:37,396 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:17:37,534 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2024-01-31 17:17:37,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:17:37,555 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:17:37,578 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-3.wvr.c[3451,3464] [2024-01-31 17:17:37,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:17:37,591 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:17:37,592 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:17:37 WrapperNode [2024-01-31 17:17:37,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:17:37,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:17:37,593 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:17:37,593 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:17:37,597 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,608 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,640 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 257 [2024-01-31 17:17:37,643 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:17:37,644 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:17:37,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:17:37,644 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:17:37,652 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,652 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,669 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,686 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 7, 2, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 5 writes are split as follows [0, 1, 2, 1, 1]. [2024-01-31 17:17:37,692 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,693 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,699 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,710 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,719 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,720 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,722 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:17:37,728 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:17:37,729 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:17:37,729 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:17:37,729 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 05:17:37" (1/1) ... [2024-01-31 17:17:37,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:17:37,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:37,762 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 17:17:37,764 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 17:17:37,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:17:37,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:17:37,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:17:37,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:17:37,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:17:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:17:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:17:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:17:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:17:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:17:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:17:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:17:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:17:37,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:17:37,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 17:17:37,790 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:17:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:17:37,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:17:37,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:17:37,792 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 17:17:37,932 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:17:37,934 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:17:38,176 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:17:38,176 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:17:38,443 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:17:38,443 INFO L320 CfgBuilder]: Removed 5 assume(true) statements. [2024-01-31 17:17:38,444 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:17:38 BoogieIcfgContainer [2024-01-31 17:17:38,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:17:38,446 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:17:38,446 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:17:38,449 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:17:38,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:17:37" (1/4) ... [2024-01-31 17:17:38,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c5cfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:17:38, skipping insertion in model container [2024-01-31 17:17:38,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:17:37" (2/4) ... [2024-01-31 17:17:38,449 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c5cfad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:17:38, skipping insertion in model container [2024-01-31 17:17:38,450 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 05:17:37" (3/4) ... [2024-01-31 17:17:38,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c5cfad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:17:38, skipping insertion in model container [2024-01-31 17:17:38,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:17:38" (4/4) ... [2024-01-31 17:17:38,451 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2024-01-31 17:17:38,465 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:17:38,465 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:17:38,465 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:17:38,501 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-31 17:17:38,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 46 transitions, 113 flow [2024-01-31 17:17:38,568 INFO L124 PetriNetUnfolderBase]: 7/43 cut-off events. [2024-01-31 17:17:38,568 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:17:38,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 43 events. 7/43 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-01-31 17:17:38,571 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 46 transitions, 113 flow [2024-01-31 17:17:38,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 42 transitions, 102 flow [2024-01-31 17:17:38,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:17:38,587 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;@311dca86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:17:38,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 17:17:38,601 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:17:38,601 INFO L124 PetriNetUnfolderBase]: 7/41 cut-off events. [2024-01-31 17:17:38,601 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 17:17:38,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:38,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:38,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:38,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:38,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1698639946, now seen corresponding path program 1 times [2024-01-31 17:17:38,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:38,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083904618] [2024-01-31 17:17:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:38,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:38,840 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 17:17:38,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:38,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083904618] [2024-01-31 17:17:38,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083904618] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:38,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:38,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:17:38,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657024588] [2024-01-31 17:17:38,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:38,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-31 17:17:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-31 17:17:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-31 17:17:38,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:17:38,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 102 flow. Second operand has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 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 17:17:38,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:38,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:17:38,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:39,056 INFO L124 PetriNetUnfolderBase]: 761/1311 cut-off events. [2024-01-31 17:17:39,056 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-01-31 17:17:39,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2463 conditions, 1311 events. 761/1311 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6600 event pairs, 629 based on Foata normal form. 140/1309 useless extension candidates. Maximal degree in co-relation 2182. Up to 1049 conditions per place. [2024-01-31 17:17:39,065 INFO L140 encePairwiseOnDemand]: 44/46 looper letters, 30 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2024-01-31 17:17:39,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 158 flow [2024-01-31 17:17:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-31 17:17:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-31 17:17:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 58 transitions. [2024-01-31 17:17:39,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-01-31 17:17:39,075 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 102 flow. Second operand 2 states and 58 transitions. [2024-01-31 17:17:39,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 158 flow [2024-01-31 17:17:39,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 17:17:39,081 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 86 flow [2024-01-31 17:17:39,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2024-01-31 17:17:39,085 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2024-01-31 17:17:39,085 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 86 flow [2024-01-31 17:17:39,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 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 17:17:39,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:39,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:39,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:17:39,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:39,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:39,087 INFO L85 PathProgramCache]: Analyzing trace with hash -253187180, now seen corresponding path program 1 times [2024-01-31 17:17:39,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:39,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781732593] [2024-01-31 17:17:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:39,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:39,229 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 17:17:39,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:39,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781732593] [2024-01-31 17:17:39,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781732593] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:39,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:39,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:17:39,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839518933] [2024-01-31 17:17:39,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:39,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:17:39,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:39,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:17:39,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:17:39,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:17:39,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 17:17:39,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:39,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:17:39,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:39,341 INFO L124 PetriNetUnfolderBase]: 767/1295 cut-off events. [2024-01-31 17:17:39,342 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-01-31 17:17:39,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2428 conditions, 1295 events. 767/1295 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6323 event pairs, 201 based on Foata normal form. 27/1243 useless extension candidates. Maximal degree in co-relation 2425. Up to 933 conditions per place. [2024-01-31 17:17:39,348 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2024-01-31 17:17:39,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 196 flow [2024-01-31 17:17:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:17:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:17:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-01-31 17:17:39,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-01-31 17:17:39,353 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 86 flow. Second operand 3 states and 82 transitions. [2024-01-31 17:17:39,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 196 flow [2024-01-31 17:17:39,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-31 17:17:39,360 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 105 flow [2024-01-31 17:17:39,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2024-01-31 17:17:39,361 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2024-01-31 17:17:39,361 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 105 flow [2024-01-31 17:17:39,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 17:17:39,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:39,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:39,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:17:39,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:39,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash 526989282, now seen corresponding path program 2 times [2024-01-31 17:17:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:39,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788748274] [2024-01-31 17:17:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:39,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:39,459 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 17:17:39,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:39,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788748274] [2024-01-31 17:17:39,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788748274] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:39,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:39,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:17:39,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004992732] [2024-01-31 17:17:39,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:39,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:17:39,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:17:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:17:39,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:17:39,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 17:17:39,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:39,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:17:39,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:39,608 INFO L124 PetriNetUnfolderBase]: 699/1289 cut-off events. [2024-01-31 17:17:39,608 INFO L125 PetriNetUnfolderBase]: For 210/213 co-relation queries the response was YES. [2024-01-31 17:17:39,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2592 conditions, 1289 events. 699/1289 cut-off events. For 210/213 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6483 event pairs, 261 based on Foata normal form. 29/1219 useless extension candidates. Maximal degree in co-relation 2587. Up to 597 conditions per place. [2024-01-31 17:17:39,614 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 43 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-01-31 17:17:39,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 229 flow [2024-01-31 17:17:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:17:39,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:17:39,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-01-31 17:17:39,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6014492753623188 [2024-01-31 17:17:39,617 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 105 flow. Second operand 3 states and 83 transitions. [2024-01-31 17:17:39,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 229 flow [2024-01-31 17:17:39,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:17:39,619 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 114 flow [2024-01-31 17:17:39,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-01-31 17:17:39,620 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-01-31 17:17:39,620 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 114 flow [2024-01-31 17:17:39,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 17:17:39,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:39,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:39,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:17:39,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:39,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:39,622 INFO L85 PathProgramCache]: Analyzing trace with hash -893344748, now seen corresponding path program 3 times [2024-01-31 17:17:39,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:39,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346713947] [2024-01-31 17:17:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:39,784 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 17:17:39,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346713947] [2024-01-31 17:17:39,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346713947] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:39,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:39,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:17:39,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25208323] [2024-01-31 17:17:39,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:39,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:17:39,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:39,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:17:39,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:17:39,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:17:39,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 17:17:39,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:39,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:17:39,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:39,913 INFO L124 PetriNetUnfolderBase]: 747/1380 cut-off events. [2024-01-31 17:17:39,914 INFO L125 PetriNetUnfolderBase]: For 299/301 co-relation queries the response was YES. [2024-01-31 17:17:39,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2924 conditions, 1380 events. 747/1380 cut-off events. For 299/301 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6927 event pairs, 550 based on Foata normal form. 27/1310 useless extension candidates. Maximal degree in co-relation 2918. Up to 1005 conditions per place. [2024-01-31 17:17:39,919 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 32 selfloop transitions, 2 changer transitions 13/57 dead transitions. [2024-01-31 17:17:39,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 57 transitions, 239 flow [2024-01-31 17:17:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:17:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:17:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-01-31 17:17:39,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-01-31 17:17:39,923 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 114 flow. Second operand 4 states and 98 transitions. [2024-01-31 17:17:39,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 57 transitions, 239 flow [2024-01-31 17:17:39,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:17:39,925 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 128 flow [2024-01-31 17:17:39,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2024-01-31 17:17:39,927 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 4 predicate places. [2024-01-31 17:17:39,927 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 128 flow [2024-01-31 17:17:39,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 17:17:39,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:39,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:39,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:17:39,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:39,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:39,928 INFO L85 PathProgramCache]: Analyzing trace with hash 156850980, now seen corresponding path program 1 times [2024-01-31 17:17:39,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:39,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879344427] [2024-01-31 17:17:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:39,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:40,040 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 17:17:40,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:40,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879344427] [2024-01-31 17:17:40,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879344427] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:40,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:40,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:17:40,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336850449] [2024-01-31 17:17:40,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:40,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:17:40,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:40,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:17:40,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:17:40,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:17:40,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 17:17:40,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:40,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:17:40,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:40,214 INFO L124 PetriNetUnfolderBase]: 948/1719 cut-off events. [2024-01-31 17:17:40,214 INFO L125 PetriNetUnfolderBase]: For 490/495 co-relation queries the response was YES. [2024-01-31 17:17:40,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3727 conditions, 1719 events. 948/1719 cut-off events. For 490/495 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8994 event pairs, 712 based on Foata normal form. 34/1655 useless extension candidates. Maximal degree in co-relation 3719. Up to 1006 conditions per place. [2024-01-31 17:17:40,223 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 33 selfloop transitions, 2 changer transitions 20/65 dead transitions. [2024-01-31 17:17:40,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 298 flow [2024-01-31 17:17:40,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:17:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:17:40,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-01-31 17:17:40,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-01-31 17:17:40,225 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 128 flow. Second operand 4 states and 102 transitions. [2024-01-31 17:17:40,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 298 flow [2024-01-31 17:17:40,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 286 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-31 17:17:40,228 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 134 flow [2024-01-31 17:17:40,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-01-31 17:17:40,228 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-01-31 17:17:40,228 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 134 flow [2024-01-31 17:17:40,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 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 17:17:40,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:40,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:40,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:17:40,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:40,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash -556197243, now seen corresponding path program 1 times [2024-01-31 17:17:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862160251] [2024-01-31 17:17:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:40,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:17:40,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:40,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862160251] [2024-01-31 17:17:40,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862160251] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:40,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:40,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 17:17:40,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665757180] [2024-01-31 17:17:40,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:40,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:17:40,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:40,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:17:40,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:17:40,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-01-31 17:17:40,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 17:17:40,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:40,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-01-31 17:17:40,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:40,711 INFO L124 PetriNetUnfolderBase]: 1383/2301 cut-off events. [2024-01-31 17:17:40,711 INFO L125 PetriNetUnfolderBase]: For 675/687 co-relation queries the response was YES. [2024-01-31 17:17:40,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5193 conditions, 2301 events. 1383/2301 cut-off events. For 675/687 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12739 event pairs, 368 based on Foata normal form. 1/2243 useless extension candidates. Maximal degree in co-relation 5184. Up to 819 conditions per place. [2024-01-31 17:17:40,721 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 86 selfloop transitions, 9 changer transitions 12/115 dead transitions. [2024-01-31 17:17:40,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 115 transitions, 541 flow [2024-01-31 17:17:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:17:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:17:40,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-01-31 17:17:40,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190217391304348 [2024-01-31 17:17:40,722 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 134 flow. Second operand 8 states and 191 transitions. [2024-01-31 17:17:40,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 115 transitions, 541 flow [2024-01-31 17:17:40,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 115 transitions, 531 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-31 17:17:40,726 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 178 flow [2024-01-31 17:17:40,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-01-31 17:17:40,727 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-01-31 17:17:40,727 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 178 flow [2024-01-31 17:17:40,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 17:17:40,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:40,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:40,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-31 17:17:40,728 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:40,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash 783623689, now seen corresponding path program 1 times [2024-01-31 17:17:40,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:40,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624882044] [2024-01-31 17:17:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:17:40,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:40,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624882044] [2024-01-31 17:17:40,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624882044] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:40,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147145850] [2024-01-31 17:17:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:40,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:40,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:40,860 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 17:17:40,876 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 17:17:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:40,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:17:40,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:17:41,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:17:41,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147145850] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:41,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:41,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-01-31 17:17:41,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840565929] [2024-01-31 17:17:41,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:41,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:17:41,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:41,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:17:41,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:17:41,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:17:41,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 178 flow. Second operand has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 17:17:41,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:41,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:17:41,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:41,536 INFO L124 PetriNetUnfolderBase]: 1778/3485 cut-off events. [2024-01-31 17:17:41,536 INFO L125 PetriNetUnfolderBase]: For 1514/1519 co-relation queries the response was YES. [2024-01-31 17:17:41,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8140 conditions, 3485 events. 1778/3485 cut-off events. For 1514/1519 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 23356 event pairs, 1124 based on Foata normal form. 114/3440 useless extension candidates. Maximal degree in co-relation 8129. Up to 1602 conditions per place. [2024-01-31 17:17:41,549 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 70 selfloop transitions, 5 changer transitions 4/92 dead transitions. [2024-01-31 17:17:41,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 92 transitions, 472 flow [2024-01-31 17:17:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:17:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:17:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-01-31 17:17:41,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-01-31 17:17:41,551 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 178 flow. Second operand 6 states and 148 transitions. [2024-01-31 17:17:41,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 92 transitions, 472 flow [2024-01-31 17:17:41,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 465 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-01-31 17:17:41,554 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 216 flow [2024-01-31 17:17:41,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2024-01-31 17:17:41,555 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-01-31 17:17:41,555 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 216 flow [2024-01-31 17:17:41,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 17:17:41,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:41,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:41,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 17:17:41,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:41,767 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:41,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2074720407, now seen corresponding path program 2 times [2024-01-31 17:17:41,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:41,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111272861] [2024-01-31 17:17:41,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:41,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:17:42,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:42,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111272861] [2024-01-31 17:17:42,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111272861] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:42,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038111246] [2024-01-31 17:17:42,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:17:42,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:42,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:42,331 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 17:17:42,356 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 17:17:42,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:17:42,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:42,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:17:42,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:17:42,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:42,568 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:17:42,568 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 24 treesize of output 11 [2024-01-31 17:17:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:42,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038111246] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:42,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:42,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-01-31 17:17:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102715834] [2024-01-31 17:17:42,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:17:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:17:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:17:42,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 46 [2024-01-31 17:17:42,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 216 flow. Second operand has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 17:17:42,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:42,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 46 [2024-01-31 17:17:42,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:43,229 INFO L124 PetriNetUnfolderBase]: 3199/5768 cut-off events. [2024-01-31 17:17:43,229 INFO L125 PetriNetUnfolderBase]: For 3369/3464 co-relation queries the response was YES. [2024-01-31 17:17:43,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14081 conditions, 5768 events. 3199/5768 cut-off events. For 3369/3464 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 38062 event pairs, 665 based on Foata normal form. 2/5586 useless extension candidates. Maximal degree in co-relation 14067. Up to 2294 conditions per place. [2024-01-31 17:17:43,264 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 129 selfloop transitions, 20 changer transitions 0/160 dead transitions. [2024-01-31 17:17:43,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 160 transitions, 878 flow [2024-01-31 17:17:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:17:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:17:43,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 295 transitions. [2024-01-31 17:17:43,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4580745341614907 [2024-01-31 17:17:43,266 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 216 flow. Second operand 14 states and 295 transitions. [2024-01-31 17:17:43,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 160 transitions, 878 flow [2024-01-31 17:17:43,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 160 transitions, 843 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-01-31 17:17:43,275 INFO L231 Difference]: Finished difference. Result has 77 places, 65 transitions, 316 flow [2024-01-31 17:17:43,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=316, PETRI_PLACES=77, PETRI_TRANSITIONS=65} [2024-01-31 17:17:43,276 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 32 predicate places. [2024-01-31 17:17:43,276 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 65 transitions, 316 flow [2024-01-31 17:17:43,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 17:17:43,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:43,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:43,290 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 17:17:43,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-01-31 17:17:43,491 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:43,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:43,491 INFO L85 PathProgramCache]: Analyzing trace with hash 976110403, now seen corresponding path program 1 times [2024-01-31 17:17:43,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:43,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566305070] [2024-01-31 17:17:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:43,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 17:17:43,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566305070] [2024-01-31 17:17:43,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566305070] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:17:43,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:17:43,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:17:43,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193678421] [2024-01-31 17:17:43,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:17:43,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:17:43,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:43,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:17:43,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:17:43,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:17:43,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 65 transitions, 316 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 17:17:43,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:43,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:17:43,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:44,033 INFO L124 PetriNetUnfolderBase]: 3138/6505 cut-off events. [2024-01-31 17:17:44,034 INFO L125 PetriNetUnfolderBase]: For 6478/6786 co-relation queries the response was YES. [2024-01-31 17:17:44,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16230 conditions, 6505 events. 3138/6505 cut-off events. For 6478/6786 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 49298 event pairs, 1067 based on Foata normal form. 222/6646 useless extension candidates. Maximal degree in co-relation 16214. Up to 1998 conditions per place. [2024-01-31 17:17:44,072 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 89 selfloop transitions, 6 changer transitions 0/109 dead transitions. [2024-01-31 17:17:44,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 109 transitions, 659 flow [2024-01-31 17:17:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 17:17:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 17:17:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-01-31 17:17:44,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-01-31 17:17:44,074 INFO L175 Difference]: Start difference. First operand has 77 places, 65 transitions, 316 flow. Second operand 4 states and 122 transitions. [2024-01-31 17:17:44,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 109 transitions, 659 flow [2024-01-31 17:17:44,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 109 transitions, 629 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-01-31 17:17:44,079 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 339 flow [2024-01-31 17:17:44,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=339, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2024-01-31 17:17:44,080 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-01-31 17:17:44,081 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 339 flow [2024-01-31 17:17:44,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 17:17:44,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:44,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:44,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 17:17:44,082 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:44,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:44,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1634115348, now seen corresponding path program 1 times [2024-01-31 17:17:44,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:44,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805855413] [2024-01-31 17:17:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:44,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:17:44,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:44,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805855413] [2024-01-31 17:17:44,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805855413] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:44,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69397029] [2024-01-31 17:17:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:44,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:44,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:44,284 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 17:17:44,288 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 17:17:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:44,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:17:44,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:17:44,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-01-31 17:17:44,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69397029] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:44,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:44,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-01-31 17:17:44,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804969954] [2024-01-31 17:17:44,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:44,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:17:44,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:17:44,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:17:44,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:17:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 339 flow. Second operand has 13 states, 13 states have (on average 16.615384615384617) internal successors, (216), 13 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 17:17:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:17:44,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:45,099 INFO L124 PetriNetUnfolderBase]: 2686/5420 cut-off events. [2024-01-31 17:17:45,100 INFO L125 PetriNetUnfolderBase]: For 7305/7600 co-relation queries the response was YES. [2024-01-31 17:17:45,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14864 conditions, 5420 events. 2686/5420 cut-off events. For 7305/7600 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 38396 event pairs, 1011 based on Foata normal form. 110/5414 useless extension candidates. Maximal degree in co-relation 14845. Up to 3490 conditions per place. [2024-01-31 17:17:45,123 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 53 selfloop transitions, 7 changer transitions 38/112 dead transitions. [2024-01-31 17:17:45,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 112 transitions, 662 flow [2024-01-31 17:17:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:17:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:17:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-01-31 17:17:45,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-31 17:17:45,124 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 339 flow. Second operand 8 states and 184 transitions. [2024-01-31 17:17:45,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 112 transitions, 662 flow [2024-01-31 17:17:45,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 112 transitions, 654 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-01-31 17:17:45,132 INFO L231 Difference]: Finished difference. Result has 87 places, 67 transitions, 334 flow [2024-01-31 17:17:45,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2024-01-31 17:17:45,133 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-01-31 17:17:45,133 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 334 flow [2024-01-31 17:17:45,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.615384615384617) internal successors, (216), 13 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 17:17:45,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:45,133 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:45,144 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 17:17:45,344 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 17:17:45,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:45,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:45,345 INFO L85 PathProgramCache]: Analyzing trace with hash 362084198, now seen corresponding path program 1 times [2024-01-31 17:17:45,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:45,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653510932] [2024-01-31 17:17:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:45,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:45,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653510932] [2024-01-31 17:17:45,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653510932] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:45,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004994332] [2024-01-31 17:17:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:45,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:45,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:45,475 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 17:17:45,477 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 17:17:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:45,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:17:45,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:45,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:45,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004994332] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:45,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:45,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:17:45,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041776553] [2024-01-31 17:17:45,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:45,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:17:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:17:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:17:45,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:17:45,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 67 transitions, 334 flow. Second operand has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 17:17:45,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:45,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:17:45,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:46,215 INFO L124 PetriNetUnfolderBase]: 3671/7416 cut-off events. [2024-01-31 17:17:46,216 INFO L125 PetriNetUnfolderBase]: For 10667/10952 co-relation queries the response was YES. [2024-01-31 17:17:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20227 conditions, 7416 events. 3671/7416 cut-off events. For 10667/10952 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 56491 event pairs, 2461 based on Foata normal form. 180/7441 useless extension candidates. Maximal degree in co-relation 20205. Up to 3679 conditions per place. [2024-01-31 17:17:46,255 INFO L140 encePairwiseOnDemand]: 42/46 looper letters, 49 selfloop transitions, 5 changer transitions 47/115 dead transitions. [2024-01-31 17:17:46,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 115 transitions, 745 flow [2024-01-31 17:17:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:17:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:17:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-01-31 17:17:46,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-01-31 17:17:46,256 INFO L175 Difference]: Start difference. First operand has 87 places, 67 transitions, 334 flow. Second operand 6 states and 147 transitions. [2024-01-31 17:17:46,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 115 transitions, 745 flow [2024-01-31 17:17:46,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 115 transitions, 707 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-01-31 17:17:46,274 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 339 flow [2024-01-31 17:17:46,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2024-01-31 17:17:46,275 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-01-31 17:17:46,275 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 339 flow [2024-01-31 17:17:46,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 0 states have call successors, (0), 0 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 17:17:46,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:46,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:46,286 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 17:17:46,486 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 17:17:46,487 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:46,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:46,487 INFO L85 PathProgramCache]: Analyzing trace with hash -495466113, now seen corresponding path program 2 times [2024-01-31 17:17:46,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:46,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909761572] [2024-01-31 17:17:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:46,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:46,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:46,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909761572] [2024-01-31 17:17:46,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909761572] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:46,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827277792] [2024-01-31 17:17:46,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:17:46,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:46,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:46,987 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 17:17:47,005 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 17:17:47,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:17:47,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:47,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:17:47,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:47,136 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 25 treesize of output 1 [2024-01-31 17:17:47,156 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 23 treesize of output 1 [2024-01-31 17:17:47,271 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 26 treesize of output 8 [2024-01-31 17:17:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:47,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:47,671 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 54 treesize of output 50 [2024-01-31 17:17:47,681 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:17:47,682 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 244 treesize of output 223 [2024-01-31 17:17:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:47,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827277792] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:47,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:47,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 27 [2024-01-31 17:17:47,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308890677] [2024-01-31 17:17:47,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:47,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:17:47,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:17:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:17:47,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-01-31 17:17:47,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 339 flow. Second operand has 27 states, 27 states have (on average 12.555555555555555) internal successors, (339), 27 states have internal predecessors, (339), 0 states have call successors, (0), 0 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 17:17:47,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:47,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-01-31 17:17:47,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:17:52,758 INFO L124 PetriNetUnfolderBase]: 22174/36388 cut-off events. [2024-01-31 17:17:52,758 INFO L125 PetriNetUnfolderBase]: For 49801/50195 co-relation queries the response was YES. [2024-01-31 17:17:52,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101141 conditions, 36388 events. 22174/36388 cut-off events. For 49801/50195 co-relation queries the response was YES. Maximal size of possible extension queue 1224. Compared 276974 event pairs, 2284 based on Foata normal form. 881/37230 useless extension candidates. Maximal degree in co-relation 101119. Up to 4831 conditions per place. [2024-01-31 17:17:53,042 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 673 selfloop transitions, 125 changer transitions 34/841 dead transitions. [2024-01-31 17:17:53,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 841 transitions, 5114 flow [2024-01-31 17:17:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-01-31 17:17:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-01-31 17:17:53,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 1199 transitions. [2024-01-31 17:17:53,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5110826939471441 [2024-01-31 17:17:53,047 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 339 flow. Second operand 51 states and 1199 transitions. [2024-01-31 17:17:53,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 841 transitions, 5114 flow [2024-01-31 17:17:53,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 841 transitions, 5077 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-01-31 17:17:53,237 INFO L231 Difference]: Finished difference. Result has 167 places, 187 transitions, 1797 flow [2024-01-31 17:17:53,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1797, PETRI_PLACES=167, PETRI_TRANSITIONS=187} [2024-01-31 17:17:53,238 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-01-31 17:17:53,238 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 187 transitions, 1797 flow [2024-01-31 17:17:53,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 12.555555555555555) internal successors, (339), 27 states have internal predecessors, (339), 0 states have call successors, (0), 0 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 17:17:53,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:17:53,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:17:53,253 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 17:17:53,453 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 17:17:53,454 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:17:53,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:17:53,455 INFO L85 PathProgramCache]: Analyzing trace with hash -640389149, now seen corresponding path program 3 times [2024-01-31 17:17:53,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:17:53,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362614700] [2024-01-31 17:17:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:17:53,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:17:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:17:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:53,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:17:53,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362614700] [2024-01-31 17:17:53,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362614700] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:17:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810325050] [2024-01-31 17:17:53,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:17:53,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:17:53,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:17:53,976 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 17:17:53,977 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 17:17:54,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:17:54,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:17:54,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-31 17:17:54,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:17:54,393 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 16 treesize of output 8 [2024-01-31 17:17:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:54,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:17:54,497 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:17:54,497 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 24 treesize of output 11 [2024-01-31 17:17:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:17:54,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810325050] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:17:54,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:17:54,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-01-31 17:17:54,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338687094] [2024-01-31 17:17:54,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:17:54,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:17:54,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:17:54,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:17:54,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:17:54,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-01-31 17:17:54,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 187 transitions, 1797 flow. Second operand has 27 states, 27 states have (on average 12.703703703703704) internal successors, (343), 27 states have internal predecessors, (343), 0 states have call successors, (0), 0 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 17:17:54,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:17:54,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-01-31 17:17:54,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:02,324 INFO L124 PetriNetUnfolderBase]: 26295/43405 cut-off events. [2024-01-31 17:18:02,324 INFO L125 PetriNetUnfolderBase]: For 657978/658446 co-relation queries the response was YES. [2024-01-31 17:18:02,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213284 conditions, 43405 events. 26295/43405 cut-off events. For 657978/658446 co-relation queries the response was YES. Maximal size of possible extension queue 1406. Compared 339611 event pairs, 2903 based on Foata normal form. 1393/44723 useless extension candidates. Maximal degree in co-relation 213224. Up to 5729 conditions per place. [2024-01-31 17:18:03,128 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 637 selfloop transitions, 159 changer transitions 32/837 dead transitions. [2024-01-31 17:18:03,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 837 transitions, 7599 flow [2024-01-31 17:18:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-31 17:18:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-31 17:18:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1092 transitions. [2024-01-31 17:18:03,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160680529300568 [2024-01-31 17:18:03,130 INFO L175 Difference]: Start difference. First operand has 167 places, 187 transitions, 1797 flow. Second operand 46 states and 1092 transitions. [2024-01-31 17:18:03,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 837 transitions, 7599 flow [2024-01-31 17:18:05,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 837 transitions, 7193 flow, removed 199 selfloop flow, removed 4 redundant places. [2024-01-31 17:18:05,423 INFO L231 Difference]: Finished difference. Result has 229 places, 229 transitions, 2722 flow [2024-01-31 17:18:05,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1531, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2722, PETRI_PLACES=229, PETRI_TRANSITIONS=229} [2024-01-31 17:18:05,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-01-31 17:18:05,424 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 229 transitions, 2722 flow [2024-01-31 17:18:05,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 12.703703703703704) internal successors, (343), 27 states have internal predecessors, (343), 0 states have call successors, (0), 0 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 17:18:05,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:05,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:05,439 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 17:18:05,627 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 17:18:05,628 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:18:05,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash -624523713, now seen corresponding path program 4 times [2024-01-31 17:18:05,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:05,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612601694] [2024-01-31 17:18:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:05,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:18:06,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:06,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612601694] [2024-01-31 17:18:06,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612601694] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:06,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165033633] [2024-01-31 17:18:06,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:18:06,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:06,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:06,115 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 17:18:06,137 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 17:18:06,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:18:06,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:06,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 17:18:06,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:06,428 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 25 treesize of output 7 [2024-01-31 17:18:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:18:06,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:18:06,620 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:18:06,620 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 24 treesize of output 11 [2024-01-31 17:18:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:18:06,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165033633] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:18:06,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:18:06,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 27 [2024-01-31 17:18:06,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567663238] [2024-01-31 17:18:06,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:18:06,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:18:06,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:06,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:18:06,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:18:06,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 46 [2024-01-31 17:18:06,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 229 transitions, 2722 flow. Second operand has 28 states, 28 states have (on average 12.428571428571429) internal successors, (348), 28 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 17:18:06,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:06,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 46 [2024-01-31 17:18:06,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:15,967 INFO L124 PetriNetUnfolderBase]: 30741/51028 cut-off events. [2024-01-31 17:18:15,967 INFO L125 PetriNetUnfolderBase]: For 1363001/1363308 co-relation queries the response was YES. [2024-01-31 17:18:16,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299512 conditions, 51028 events. 30741/51028 cut-off events. For 1363001/1363308 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 412513 event pairs, 2325 based on Foata normal form. 488/51508 useless extension candidates. Maximal degree in co-relation 299431. Up to 6837 conditions per place. [2024-01-31 17:18:16,945 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 408 selfloop transitions, 244 changer transitions 40/701 dead transitions. [2024-01-31 17:18:16,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 701 transitions, 8989 flow [2024-01-31 17:18:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:18:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:18:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 584 transitions. [2024-01-31 17:18:16,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882943143812709 [2024-01-31 17:18:16,947 INFO L175 Difference]: Start difference. First operand has 229 places, 229 transitions, 2722 flow. Second operand 26 states and 584 transitions. [2024-01-31 17:18:16,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 701 transitions, 8989 flow [2024-01-31 17:18:25,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 701 transitions, 8287 flow, removed 250 selfloop flow, removed 22 redundant places. [2024-01-31 17:18:25,134 INFO L231 Difference]: Finished difference. Result has 248 places, 385 transitions, 5930 flow [2024-01-31 17:18:25,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5930, PETRI_PLACES=248, PETRI_TRANSITIONS=385} [2024-01-31 17:18:25,135 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-01-31 17:18:25,135 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 385 transitions, 5930 flow [2024-01-31 17:18:25,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 12.428571428571429) internal successors, (348), 28 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 17:18:25,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:25,135 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:25,149 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 17:18:25,344 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 17:18:25,344 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:18:25,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash 352048231, now seen corresponding path program 5 times [2024-01-31 17:18:25,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:25,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209386017] [2024-01-31 17:18:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:18:25,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:25,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209386017] [2024-01-31 17:18:25,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209386017] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:18:25,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83133429] [2024-01-31 17:18:25,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:18:25,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:18:25,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:18:25,686 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 17:18:25,687 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 17:18:25,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:18:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:18:25,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:18:25,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:18:25,858 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 23 treesize of output 7 [2024-01-31 17:18:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-31 17:18:25,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:18:25,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83133429] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:18:25,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 17:18:25,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2024-01-31 17:18:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925896794] [2024-01-31 17:18:25,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:18:25,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:18:25,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:25,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:18:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:18:25,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 46 [2024-01-31 17:18:25,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 385 transitions, 5930 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:25,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:25,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 46 [2024-01-31 17:18:25,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:18:34,105 INFO L124 PetriNetUnfolderBase]: 26322/45888 cut-off events. [2024-01-31 17:18:34,105 INFO L125 PetriNetUnfolderBase]: For 1577156/1578092 co-relation queries the response was YES. [2024-01-31 17:18:34,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283080 conditions, 45888 events. 26322/45888 cut-off events. For 1577156/1578092 co-relation queries the response was YES. Maximal size of possible extension queue 1470. Compared 389079 event pairs, 3318 based on Foata normal form. 1398/47082 useless extension candidates. Maximal degree in co-relation 282986. Up to 21663 conditions per place. [2024-01-31 17:18:35,175 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 230 selfloop transitions, 218 changer transitions 14/505 dead transitions. [2024-01-31 17:18:35,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 505 transitions, 8018 flow [2024-01-31 17:18:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:18:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:18:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-01-31 17:18:35,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562111801242236 [2024-01-31 17:18:35,176 INFO L175 Difference]: Start difference. First operand has 248 places, 385 transitions, 5930 flow. Second operand 7 states and 181 transitions. [2024-01-31 17:18:35,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 505 transitions, 8018 flow [2024-01-31 17:18:53,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 505 transitions, 7153 flow, removed 405 selfloop flow, removed 10 redundant places. [2024-01-31 17:18:53,460 INFO L231 Difference]: Finished difference. Result has 247 places, 412 transitions, 6514 flow [2024-01-31 17:18:53,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5150, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6514, PETRI_PLACES=247, PETRI_TRANSITIONS=412} [2024-01-31 17:18:53,461 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-01-31 17:18:53,461 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 412 transitions, 6514 flow [2024-01-31 17:18:53,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:53,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:18:53,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:18:53,473 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 17:18:53,668 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 17:18:53,668 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 17:18:53,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:18:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash -616927547, now seen corresponding path program 2 times [2024-01-31 17:18:53,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:18:53,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084552431] [2024-01-31 17:18:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:18:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:18:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:18:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-01-31 17:18:53,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:18:53,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084552431] [2024-01-31 17:18:53,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084552431] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:18:53,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:18:53,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:18:53,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952013079] [2024-01-31 17:18:53,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:18:53,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:18:53,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:18:53,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:18:53,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:18:53,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2024-01-31 17:18:53,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 412 transitions, 6514 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:18:53,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:18:53,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2024-01-31 17:18:53,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand