./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/unroll-cond-2.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/unroll-cond-2.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 17:22:43,505 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:22:43,623 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:22:43,627 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:22:43,628 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:22:43,653 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:22:43,655 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:22:43,656 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:22:43,657 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:22:43,661 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:22:43,661 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:22:43,662 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:22:43,663 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:22:43,664 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:22:43,664 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:22:43,664 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:22:43,664 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:22:43,665 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:22:43,665 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:22:43,665 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:22:43,665 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:22:43,666 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:22:43,666 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:22:43,666 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:22:43,667 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:22:43,667 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:22:43,667 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:22:43,667 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:22:43,668 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:22:43,668 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:22:43,669 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:22:43,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:22:43,670 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:22:43,670 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:22:43,670 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:22:43,671 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:22:43,671 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:22:43,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:22:43,671 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:22:43,671 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:22:43,672 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:22:43,672 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:22:43,672 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:22:43,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:22:43,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:22:43,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:22:43,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:22:43,942 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:22:43,943 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:22:43,944 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2024-01-31 17:22:45,215 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:22:45,426 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:22:45,427 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2024-01-31 17:22:45,435 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b8525b2/33f1d6ba2d9e460a856d8a595a4fe21a/FLAG394f67b98 [2024-01-31 17:22:45,450 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72b8525b2/33f1d6ba2d9e460a856d8a595a4fe21a [2024-01-31 17:22:45,453 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:22:45,454 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:22:45,455 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/unroll-cond-2.wvr.yml/witness.yml [2024-01-31 17:22:45,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:22:45,614 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:22:45,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:22:45,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:22:45,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:22:45,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:22:45" (1/2) ... [2024-01-31 17:22:45,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53238e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:22:45, skipping insertion in model container [2024-01-31 17:22:45,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:22:45" (1/2) ... [2024-01-31 17:22:45,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c2b3eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:22:45, skipping insertion in model container [2024-01-31 17:22:45,625 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:22:45" (2/2) ... [2024-01-31 17:22:45,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53238e8d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:22:45, skipping insertion in model container [2024-01-31 17:22:45,626 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:22:45" (2/2) ... [2024-01-31 17:22:45,626 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:22:45,680 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:22:45,682 INFO L98 nessWitnessExtractor]: Location invariant after [L48-L48] (unsigned long )_argptr == 0UL [2024-01-31 17:22:45,682 INFO L98 nessWitnessExtractor]: Location invariant after [L58-L58] (unsigned long )_argptr == 0UL [2024-01-31 17:22:45,702 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:22:45,857 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-01-31 17:22:45,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:22:45,877 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:22:45,890 WARN L424 MainDispatcher]: Unable to annotate unsigned int with a witness entry [2024-01-31 17:22:45,892 WARN L424 MainDispatcher]: Unable to annotate unsigned int with a witness entry [2024-01-31 17:22:45,898 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c[2500,2513] [2024-01-31 17:22:45,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:22:45,917 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:22:45,917 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:22:45 WrapperNode [2024-01-31 17:22:45,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:22:45,919 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:22:45,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:22:45,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:22:45,926 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 05:22:45" (1/1) ... [2024-01-31 17:22:45,935 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 05:22:45" (1/1) ... [2024-01-31 17:22:45,962 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 146 [2024-01-31 17:22:45,963 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:22:45,964 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:22:45,964 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:22:45,964 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:22:45,975 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 05:22:45" (1/1) ... [2024-01-31 17:22:45,975 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 05:22:45" (1/1) ... [2024-01-31 17:22:45,983 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 05:22:45" (1/1) ... [2024-01-31 17:22:46,000 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [2, 2, 2, 5]. 45 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-31 17:22:46,000 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 05:22:45" (1/1) ... [2024-01-31 17:22:46,000 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 05:22:45" (1/1) ... [2024-01-31 17:22:46,009 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 05:22:45" (1/1) ... [2024-01-31 17:22:46,013 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 05:22:45" (1/1) ... [2024-01-31 17:22:46,015 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 05:22:45" (1/1) ... [2024-01-31 17:22:46,017 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 05:22:45" (1/1) ... [2024-01-31 17:22:46,020 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:22:46,021 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:22:46,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:22:46,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:22:46,022 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 05:22:45" (1/1) ... [2024-01-31 17:22:46,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:22:46,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:22:46,070 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 17:22:46,088 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 17:22:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:22:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 17:22:46,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 17:22:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 17:22:46,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 17:22:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:22:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:22:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:22:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:22:46,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:22:46,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:22:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:22:46,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:22:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:22:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 17:22:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:22:46,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:22:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:22:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:22:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:22:46,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:22:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:22:46,126 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 17:22:46,269 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:22:46,271 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:22:46,532 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:22:46,532 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:22:46,795 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:22:46,795 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-31 17:22:46,797 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:22:46 BoogieIcfgContainer [2024-01-31 17:22:46,798 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:22:46,803 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:22:46,803 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:22:46,807 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:22:46,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:22:45" (1/4) ... [2024-01-31 17:22:46,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e2035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:22:46, skipping insertion in model container [2024-01-31 17:22:46,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:22:45" (2/4) ... [2024-01-31 17:22:46,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e2035 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:22:46, skipping insertion in model container [2024-01-31 17:22:46,808 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 05:22:45" (3/4) ... [2024-01-31 17:22:46,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e2035 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:22:46, skipping insertion in model container [2024-01-31 17:22:46,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:22:46" (4/4) ... [2024-01-31 17:22:46,810 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-01-31 17:22:46,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:22:46,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 17:22:46,829 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:22:46,869 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:22:46,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2024-01-31 17:22:46,931 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2024-01-31 17:22:46,931 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:22:46,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-01-31 17:22:46,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2024-01-31 17:22:46,938 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2024-01-31 17:22:46,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:22:46,955 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;@6248648a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:22:46,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-31 17:22:46,966 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:22:46,966 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-01-31 17:22:46,966 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:22:46,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:46,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:46,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:46,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash 587578817, now seen corresponding path program 1 times [2024-01-31 17:22:46,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:46,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588967743] [2024-01-31 17:22:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:46,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:47,479 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 17:22:47,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:47,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588967743] [2024-01-31 17:22:47,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588967743] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:22:47,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:22:47,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:22:47,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014460548] [2024-01-31 17:22:47,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:22:47,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:22:47,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:47,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:22:47,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:22:47,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:47,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:47,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:47,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:47,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:47,615 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2024-01-31 17:22:47,615 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-01-31 17:22:47,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 77 events. 41/77 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 24 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2024-01-31 17:22:47,621 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 16 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2024-01-31 17:22:47,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 19 transitions, 86 flow [2024-01-31 17:22:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:22:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:22:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2024-01-31 17:22:47,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-31 17:22:47,638 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 28 transitions. [2024-01-31 17:22:47,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 19 transitions, 86 flow [2024-01-31 17:22:47,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 17:22:47,645 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2024-01-31 17:22:47,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2024-01-31 17:22:47,655 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-01-31 17:22:47,655 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2024-01-31 17:22:47,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:47,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:47,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:47,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 17:22:47,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:47,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2041042086, now seen corresponding path program 1 times [2024-01-31 17:22:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:47,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23774097] [2024-01-31 17:22:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:47,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:48,033 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 17:22:48,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:48,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23774097] [2024-01-31 17:22:48,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23774097] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:22:48,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:22:48,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:22:48,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783200586] [2024-01-31 17:22:48,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:22:48,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:22:48,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:48,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:22:48,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:22:48,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:48,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:48,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:48,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:48,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:48,197 INFO L124 PetriNetUnfolderBase]: 74/137 cut-off events. [2024-01-31 17:22:48,198 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:22:48,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 137 events. 74/137 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 361 event pairs, 3 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 277. Up to 85 conditions per place. [2024-01-31 17:22:48,200 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 33 selfloop transitions, 11 changer transitions 2/47 dead transitions. [2024-01-31 17:22:48,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 47 transitions, 206 flow [2024-01-31 17:22:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:22:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:22:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-01-31 17:22:48,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-01-31 17:22:48,203 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 6 states and 65 transitions. [2024-01-31 17:22:48,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 47 transitions, 206 flow [2024-01-31 17:22:48,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 47 transitions, 202 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 17:22:48,205 INFO L231 Difference]: Finished difference. Result has 28 places, 29 transitions, 116 flow [2024-01-31 17:22:48,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=28, PETRI_TRANSITIONS=29} [2024-01-31 17:22:48,206 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-01-31 17:22:48,206 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 29 transitions, 116 flow [2024-01-31 17:22:48,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:48,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:48,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:48,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:22:48,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:48,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1036133586, now seen corresponding path program 2 times [2024-01-31 17:22:48,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:48,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281080198] [2024-01-31 17:22:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:48,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:48,444 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 17:22:48,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:48,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281080198] [2024-01-31 17:22:48,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281080198] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:22:48,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:22:48,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:22:48,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22052486] [2024-01-31 17:22:48,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:22:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:22:48,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:22:48,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:22:48,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:48,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:48,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:48,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:48,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:48,604 INFO L124 PetriNetUnfolderBase]: 83/154 cut-off events. [2024-01-31 17:22:48,604 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-01-31 17:22:48,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 154 events. 83/154 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 413 event pairs, 11 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 452. Up to 95 conditions per place. [2024-01-31 17:22:48,609 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 33 selfloop transitions, 17 changer transitions 2/53 dead transitions. [2024-01-31 17:22:48,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 53 transitions, 306 flow [2024-01-31 17:22:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:22:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:22:48,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-01-31 17:22:48,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-01-31 17:22:48,614 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 116 flow. Second operand 6 states and 64 transitions. [2024-01-31 17:22:48,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 53 transitions, 306 flow [2024-01-31 17:22:48,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 53 transitions, 296 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-01-31 17:22:48,619 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 205 flow [2024-01-31 17:22:48,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2024-01-31 17:22:48,621 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-01-31 17:22:48,622 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 205 flow [2024-01-31 17:22:48,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:48,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:48,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:48,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:22:48,623 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:48,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:48,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1189714720, now seen corresponding path program 3 times [2024-01-31 17:22:48,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:48,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741230772] [2024-01-31 17:22:48,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:48,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:48,847 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 17:22:48,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:48,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741230772] [2024-01-31 17:22:48,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741230772] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:22:48,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:22:48,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:22:48,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720752697] [2024-01-31 17:22:48,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:22:48,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:22:48,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:48,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:22:48,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:22:48,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:48,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 205 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:48,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:48,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:48,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:48,960 INFO L124 PetriNetUnfolderBase]: 84/157 cut-off events. [2024-01-31 17:22:48,961 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-01-31 17:22:48,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 157 events. 84/157 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 447 event pairs, 2 based on Foata normal form. 1/135 useless extension candidates. Maximal degree in co-relation 556. Up to 95 conditions per place. [2024-01-31 17:22:48,963 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 32 selfloop transitions, 19 changer transitions 4/56 dead transitions. [2024-01-31 17:22:48,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 377 flow [2024-01-31 17:22:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:22:48,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:22:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 66 transitions. [2024-01-31 17:22:48,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-31 17:22:48,965 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 205 flow. Second operand 6 states and 66 transitions. [2024-01-31 17:22:48,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 377 flow [2024-01-31 17:22:48,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 348 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-01-31 17:22:48,968 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 254 flow [2024-01-31 17:22:48,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-01-31 17:22:48,969 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2024-01-31 17:22:48,969 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 254 flow [2024-01-31 17:22:48,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:48,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:48,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:48,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:22:48,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:48,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:48,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1054567612, now seen corresponding path program 4 times [2024-01-31 17:22:48,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:48,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356746738] [2024-01-31 17:22:48,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:48,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:49,152 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 17:22:49,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:49,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356746738] [2024-01-31 17:22:49,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356746738] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:22:49,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:22:49,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:22:49,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007791562] [2024-01-31 17:22:49,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:22:49,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:22:49,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:22:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:22:49,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:49,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:49,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:49,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:49,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:49,261 INFO L124 PetriNetUnfolderBase]: 102/194 cut-off events. [2024-01-31 17:22:49,262 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2024-01-31 17:22:49,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 194 events. 102/194 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 592 event pairs, 15 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 726. Up to 73 conditions per place. [2024-01-31 17:22:49,264 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 39 selfloop transitions, 20 changer transitions 2/62 dead transitions. [2024-01-31 17:22:49,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 62 transitions, 464 flow [2024-01-31 17:22:49,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:22:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:22:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 67 transitions. [2024-01-31 17:22:49,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-01-31 17:22:49,267 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 254 flow. Second operand 6 states and 67 transitions. [2024-01-31 17:22:49,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 62 transitions, 464 flow [2024-01-31 17:22:49,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 421 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-01-31 17:22:49,272 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 308 flow [2024-01-31 17:22:49,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-01-31 17:22:49,272 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2024-01-31 17:22:49,273 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 308 flow [2024-01-31 17:22:49,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:49,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:49,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:49,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-31 17:22:49,274 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:49,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash 930289695, now seen corresponding path program 1 times [2024-01-31 17:22:49,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:49,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647865119] [2024-01-31 17:22:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:49,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:49,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647865119] [2024-01-31 17:22:49,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647865119] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:22:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800503189] [2024-01-31 17:22:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:49,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:49,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:22:49,544 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 17:22:49,564 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 17:22:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:49,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:22:49,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:22:49,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-31 17:22:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:49,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:22:50,030 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:22:50,030 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 46 treesize of output 26 [2024-01-31 17:22:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:50,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800503189] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:22:50,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:22:50,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-01-31 17:22:50,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178991731] [2024-01-31 17:22:50,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:22:50,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:22:50,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:50,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:22:50,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:22:50,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:50,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 308 flow. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:50,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:50,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:50,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:50,420 INFO L124 PetriNetUnfolderBase]: 145/270 cut-off events. [2024-01-31 17:22:50,420 INFO L125 PetriNetUnfolderBase]: For 499/499 co-relation queries the response was YES. [2024-01-31 17:22:50,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 270 events. 145/270 cut-off events. For 499/499 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 943 event pairs, 7 based on Foata normal form. 1/270 useless extension candidates. Maximal degree in co-relation 1042. Up to 157 conditions per place. [2024-01-31 17:22:50,423 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 53 selfloop transitions, 26 changer transitions 4/84 dead transitions. [2024-01-31 17:22:50,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 635 flow [2024-01-31 17:22:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:22:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:22:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2024-01-31 17:22:50,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-31 17:22:50,425 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 308 flow. Second operand 10 states and 100 transitions. [2024-01-31 17:22:50,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 635 flow [2024-01-31 17:22:50,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 599 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-01-31 17:22:50,430 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 405 flow [2024-01-31 17:22:50,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=405, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-01-31 17:22:50,431 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 34 predicate places. [2024-01-31 17:22:50,431 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 405 flow [2024-01-31 17:22:50,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:50,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:50,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:50,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:22:50,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-31 17:22:50,645 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:50,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:50,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1530794246, now seen corresponding path program 1 times [2024-01-31 17:22:50,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:50,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147475410] [2024-01-31 17:22:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:50,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:50,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:50,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147475410] [2024-01-31 17:22:50,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147475410] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:22:50,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215925475] [2024-01-31 17:22:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:50,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:50,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:22:50,843 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 17:22:50,850 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 17:22:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:50,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 17:22:50,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:22:50,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:22:51,240 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:22:51,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2024-01-31 17:22:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:51,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:22:51,998 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 72 treesize of output 64 [2024-01-31 17:22:52,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:22:52,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 116 [2024-01-31 17:22:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:52,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215925475] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:22:52,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:22:52,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2024-01-31 17:22:52,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82234097] [2024-01-31 17:22:52,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:22:52,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:22:52,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:22:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:22:52,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:52,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 405 flow. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 17:22:52,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:52,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:52,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:53,976 INFO L124 PetriNetUnfolderBase]: 415/749 cut-off events. [2024-01-31 17:22:53,977 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-01-31 17:22:53,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3184 conditions, 749 events. 415/749 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3437 event pairs, 39 based on Foata normal form. 15/764 useless extension candidates. Maximal degree in co-relation 3116. Up to 277 conditions per place. [2024-01-31 17:22:53,983 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 94 selfloop transitions, 63 changer transitions 65/223 dead transitions. [2024-01-31 17:22:53,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 223 transitions, 1739 flow [2024-01-31 17:22:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 17:22:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 17:22:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 291 transitions. [2024-01-31 17:22:53,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-01-31 17:22:53,988 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 405 flow. Second operand 30 states and 291 transitions. [2024-01-31 17:22:53,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 223 transitions, 1739 flow [2024-01-31 17:22:53,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 223 transitions, 1643 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-01-31 17:22:53,999 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 882 flow [2024-01-31 17:22:53,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=882, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-01-31 17:22:54,000 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2024-01-31 17:22:54,000 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 882 flow [2024-01-31 17:22:54,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 17:22:54,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:54,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:54,019 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 17:22:54,219 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,SelfDestructingSolverStorable6 [2024-01-31 17:22:54,219 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:54,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash -974695041, now seen corresponding path program 2 times [2024-01-31 17:22:54,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:54,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521441620] [2024-01-31 17:22:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:54,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:54,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521441620] [2024-01-31 17:22:54,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521441620] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:22:54,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041105500] [2024-01-31 17:22:54,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:22:54,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:54,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:22:54,542 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 17:22:54,568 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 17:22:54,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:22:54,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:22:54,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2024-01-31 17:22:54,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:22:54,778 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 40 treesize of output 32 [2024-01-31 17:22:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:54,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:22:54,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:22:54,921 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 48 treesize of output 33 [2024-01-31 17:22:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:55,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041105500] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:22:55,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:22:55,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2024-01-31 17:22:55,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733256783] [2024-01-31 17:22:55,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:22:55,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:22:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:22:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:22:55,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:55,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 882 flow. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:55,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:55,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:55,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:55,375 INFO L124 PetriNetUnfolderBase]: 285/523 cut-off events. [2024-01-31 17:22:55,375 INFO L125 PetriNetUnfolderBase]: For 1864/1864 co-relation queries the response was YES. [2024-01-31 17:22:55,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2667 conditions, 523 events. 285/523 cut-off events. For 1864/1864 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2178 event pairs, 30 based on Foata normal form. 1/522 useless extension candidates. Maximal degree in co-relation 2593. Up to 401 conditions per place. [2024-01-31 17:22:55,381 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 79 selfloop transitions, 41 changer transitions 4/125 dead transitions. [2024-01-31 17:22:55,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 125 transitions, 1286 flow [2024-01-31 17:22:55,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:22:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:22:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 98 transitions. [2024-01-31 17:22:55,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-01-31 17:22:55,383 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 882 flow. Second operand 11 states and 98 transitions. [2024-01-31 17:22:55,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 125 transitions, 1286 flow [2024-01-31 17:22:55,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 125 transitions, 1136 flow, removed 42 selfloop flow, removed 12 redundant places. [2024-01-31 17:22:55,397 INFO L231 Difference]: Finished difference. Result has 84 places, 97 transitions, 903 flow [2024-01-31 17:22:55,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=903, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2024-01-31 17:22:55,398 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 62 predicate places. [2024-01-31 17:22:55,398 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 903 flow [2024-01-31 17:22:55,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:55,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:55,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:55,416 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 17:22:55,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:55,613 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:55,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:55,614 INFO L85 PathProgramCache]: Analyzing trace with hash 611109239, now seen corresponding path program 3 times [2024-01-31 17:22:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:55,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066859826] [2024-01-31 17:22:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:55,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:55,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066859826] [2024-01-31 17:22:55,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066859826] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:22:55,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419852754] [2024-01-31 17:22:55,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:22:55,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:22:55,876 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 17:22:55,897 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 17:22:55,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:22:55,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:22:55,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-31 17:22:55,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:22:56,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-31 17:22:56,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:56,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:22:56,185 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:22:56,186 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 81 treesize of output 73 [2024-01-31 17:22:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:56,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419852754] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:22:56,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:22:56,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2024-01-31 17:22:56,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651901324] [2024-01-31 17:22:56,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:22:56,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:22:56,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:22:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:22:56,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:56,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 903 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 17:22:56,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:56,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:56,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:56,643 INFO L124 PetriNetUnfolderBase]: 294/543 cut-off events. [2024-01-31 17:22:56,643 INFO L125 PetriNetUnfolderBase]: For 1825/1825 co-relation queries the response was YES. [2024-01-31 17:22:56,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2664 conditions, 543 events. 294/543 cut-off events. For 1825/1825 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2305 event pairs, 38 based on Foata normal form. 1/544 useless extension candidates. Maximal degree in co-relation 2533. Up to 411 conditions per place. [2024-01-31 17:22:56,649 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 79 selfloop transitions, 41 changer transitions 4/125 dead transitions. [2024-01-31 17:22:56,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 125 transitions, 1249 flow [2024-01-31 17:22:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:22:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:22:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 102 transitions. [2024-01-31 17:22:56,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2024-01-31 17:22:56,651 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 903 flow. Second operand 13 states and 102 transitions. [2024-01-31 17:22:56,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 125 transitions, 1249 flow [2024-01-31 17:22:56,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 125 transitions, 1135 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-01-31 17:22:56,667 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 910 flow [2024-01-31 17:22:56,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=910, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-01-31 17:22:56,668 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2024-01-31 17:22:56,669 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 910 flow [2024-01-31 17:22:56,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 17:22:56,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:56,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:56,684 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 17:22:56,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:56,884 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:56,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2139744699, now seen corresponding path program 2 times [2024-01-31 17:22:56,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:56,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099683577] [2024-01-31 17:22:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:56,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:22:57,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099683577] [2024-01-31 17:22:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099683577] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:22:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130748798] [2024-01-31 17:22:57,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:22:57,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:57,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:22:57,035 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 17:22:57,054 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 17:22:57,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:22:57,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:22:57,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 17:22:57,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:22:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:22:57,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:22:57,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:22:57,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130748798] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:22:57,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:22:57,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-01-31 17:22:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878121385] [2024-01-31 17:22:57,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:22:57,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-01-31 17:22:57,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:57,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-01-31 17:22:57,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-01-31 17:22:57,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:57,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 910 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 17:22:57,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:57,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:57,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:22:57,645 INFO L124 PetriNetUnfolderBase]: 303/564 cut-off events. [2024-01-31 17:22:57,646 INFO L125 PetriNetUnfolderBase]: For 1637/1637 co-relation queries the response was YES. [2024-01-31 17:22:57,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2656 conditions, 564 events. 303/564 cut-off events. For 1637/1637 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2440 event pairs, 94 based on Foata normal form. 12/576 useless extension candidates. Maximal degree in co-relation 2575. Up to 398 conditions per place. [2024-01-31 17:22:57,651 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 100 selfloop transitions, 31 changer transitions 0/132 dead transitions. [2024-01-31 17:22:57,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 132 transitions, 1285 flow [2024-01-31 17:22:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:22:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:22:57,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2024-01-31 17:22:57,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-01-31 17:22:57,653 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 910 flow. Second operand 9 states and 86 transitions. [2024-01-31 17:22:57,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 132 transitions, 1285 flow [2024-01-31 17:22:57,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 1216 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-01-31 17:22:57,668 INFO L231 Difference]: Finished difference. Result has 97 places, 105 transitions, 986 flow [2024-01-31 17:22:57,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=986, PETRI_PLACES=97, PETRI_TRANSITIONS=105} [2024-01-31 17:22:57,670 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 75 predicate places. [2024-01-31 17:22:57,670 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 105 transitions, 986 flow [2024-01-31 17:22:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 17:22:57,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:22:57,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:22:57,692 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 17:22:57,884 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,SelfDestructingSolverStorable9 [2024-01-31 17:22:57,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:22:57,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:22:57,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1647846022, now seen corresponding path program 4 times [2024-01-31 17:22:57,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:22:57,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384757869] [2024-01-31 17:22:57,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:22:57,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:22:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:22:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:22:58,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:22:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384757869] [2024-01-31 17:22:58,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384757869] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:22:58,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922971322] [2024-01-31 17:22:58,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:22:58,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:22:58,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:22:58,027 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 17:22:58,028 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 17:22:58,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:22:58,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:22:58,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 17:22:58,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:22:58,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:22:58,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-31 17:22:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:58,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:22:58,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-31 17:22:58,874 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:22:58,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-31 17:22:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:22:58,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922971322] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:22:58,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:22:58,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-01-31 17:22:58,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021640634] [2024-01-31 17:22:58,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:22:58,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 17:22:58,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:22:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 17:22:58,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-01-31 17:22:58,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:22:58,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 105 transitions, 986 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:22:58,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:22:58,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:22:58,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:03,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-01-31 17:23:07,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-01-31 17:23:11,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-01-31 17:23:16,714 INFO L124 PetriNetUnfolderBase]: 429/835 cut-off events. [2024-01-31 17:23:16,714 INFO L125 PetriNetUnfolderBase]: For 2971/2971 co-relation queries the response was YES. [2024-01-31 17:23:16,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 835 events. 429/835 cut-off events. For 2971/2971 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4251 event pairs, 36 based on Foata normal form. 17/851 useless extension candidates. Maximal degree in co-relation 3928. Up to 211 conditions per place. [2024-01-31 17:23:16,721 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 102 selfloop transitions, 60 changer transitions 79/242 dead transitions. [2024-01-31 17:23:16,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 242 transitions, 2273 flow [2024-01-31 17:23:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:23:16,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:23:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 272 transitions. [2024-01-31 17:23:16,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-01-31 17:23:16,725 INFO L175 Difference]: Start difference. First operand has 97 places, 105 transitions, 986 flow. Second operand 28 states and 272 transitions. [2024-01-31 17:23:16,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 242 transitions, 2273 flow [2024-01-31 17:23:16,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 242 transitions, 2232 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-31 17:23:16,743 INFO L231 Difference]: Finished difference. Result has 128 places, 95 transitions, 1056 flow [2024-01-31 17:23:16,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1056, PETRI_PLACES=128, PETRI_TRANSITIONS=95} [2024-01-31 17:23:16,744 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 106 predicate places. [2024-01-31 17:23:16,744 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 95 transitions, 1056 flow [2024-01-31 17:23:16,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:16,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:16,745 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:16,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:16,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:16,960 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:16,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash 673884840, now seen corresponding path program 5 times [2024-01-31 17:23:16,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:16,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53226711] [2024-01-31 17:23:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:16,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:17,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:17,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53226711] [2024-01-31 17:23:17,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53226711] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:17,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963627600] [2024-01-31 17:23:17,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:23:17,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:17,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:17,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:17,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:23:17,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:17,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:17,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2024-01-31 17:23:17,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:17,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:23:17,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-31 17:23:17,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:17,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:18,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-31 17:23:18,144 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:23:18,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-31 17:23:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:18,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963627600] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:18,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:18,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2024-01-31 17:23:18,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403653609] [2024-01-31 17:23:18,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:18,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-31 17:23:18,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:18,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-31 17:23:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-01-31 17:23:18,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:18,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 95 transitions, 1056 flow. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:18,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:18,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:18,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:19,221 INFO L124 PetriNetUnfolderBase]: 260/555 cut-off events. [2024-01-31 17:23:19,221 INFO L125 PetriNetUnfolderBase]: For 3045/3045 co-relation queries the response was YES. [2024-01-31 17:23:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 555 events. 260/555 cut-off events. For 3045/3045 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2775 event pairs, 7 based on Foata normal form. 5/559 useless extension candidates. Maximal degree in co-relation 2862. Up to 166 conditions per place. [2024-01-31 17:23:19,226 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 92 selfloop transitions, 41 changer transitions 37/171 dead transitions. [2024-01-31 17:23:19,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 171 transitions, 1809 flow [2024-01-31 17:23:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 17:23:19,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 17:23:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 203 transitions. [2024-01-31 17:23:19,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-01-31 17:23:19,228 INFO L175 Difference]: Start difference. First operand has 128 places, 95 transitions, 1056 flow. Second operand 25 states and 203 transitions. [2024-01-31 17:23:19,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 171 transitions, 1809 flow [2024-01-31 17:23:19,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1582 flow, removed 56 selfloop flow, removed 21 redundant places. [2024-01-31 17:23:19,271 INFO L231 Difference]: Finished difference. Result has 126 places, 87 transitions, 897 flow [2024-01-31 17:23:19,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=897, PETRI_PLACES=126, PETRI_TRANSITIONS=87} [2024-01-31 17:23:19,273 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 104 predicate places. [2024-01-31 17:23:19,273 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 87 transitions, 897 flow [2024-01-31 17:23:19,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:19,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:19,274 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:19,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:19,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:19,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:19,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:19,490 INFO L85 PathProgramCache]: Analyzing trace with hash 633277, now seen corresponding path program 3 times [2024-01-31 17:23:19,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:19,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862394862] [2024-01-31 17:23:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:19,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862394862] [2024-01-31 17:23:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862394862] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465240675] [2024-01-31 17:23:19,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:23:19,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:19,654 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:19,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:23:19,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:23:19,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:19,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:19,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:19,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465240675] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:19,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:19,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:23:19,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102139787] [2024-01-31 17:23:19,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:19,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:23:19,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:19,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:23:19,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:23:19,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:19,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 87 transitions, 897 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:19,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:19,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:19,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:20,511 INFO L124 PetriNetUnfolderBase]: 336/696 cut-off events. [2024-01-31 17:23:20,511 INFO L125 PetriNetUnfolderBase]: For 3065/3065 co-relation queries the response was YES. [2024-01-31 17:23:20,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3503 conditions, 696 events. 336/696 cut-off events. For 3065/3065 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3543 event pairs, 58 based on Foata normal form. 20/715 useless extension candidates. Maximal degree in co-relation 3453. Up to 189 conditions per place. [2024-01-31 17:23:20,518 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 121 selfloop transitions, 75 changer transitions 1/198 dead transitions. [2024-01-31 17:23:20,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 198 transitions, 2046 flow [2024-01-31 17:23:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:23:20,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:23:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 191 transitions. [2024-01-31 17:23:20,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47869674185463656 [2024-01-31 17:23:20,519 INFO L175 Difference]: Start difference. First operand has 126 places, 87 transitions, 897 flow. Second operand 19 states and 191 transitions. [2024-01-31 17:23:20,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 198 transitions, 2046 flow [2024-01-31 17:23:20,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 198 transitions, 1844 flow, removed 35 selfloop flow, removed 20 redundant places. [2024-01-31 17:23:20,535 INFO L231 Difference]: Finished difference. Result has 126 places, 123 transitions, 1412 flow [2024-01-31 17:23:20,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1412, PETRI_PLACES=126, PETRI_TRANSITIONS=123} [2024-01-31 17:23:20,536 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 104 predicate places. [2024-01-31 17:23:20,536 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 123 transitions, 1412 flow [2024-01-31 17:23:20,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:20,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:20,536 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:20,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:20,752 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,SelfDestructingSolverStorable12 [2024-01-31 17:23:20,752 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:20,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:20,753 INFO L85 PathProgramCache]: Analyzing trace with hash 384082948, now seen corresponding path program 6 times [2024-01-31 17:23:20,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:20,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142022335] [2024-01-31 17:23:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:20,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:20,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142022335] [2024-01-31 17:23:20,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142022335] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:20,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836161736] [2024-01-31 17:23:20,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:23:20,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:20,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:20,892 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:20,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:23:20,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:23:20,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:20,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-31 17:23:20,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:21,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:23:21,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-01-31 17:23:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:21,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:21,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-01-31 17:23:21,601 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-31 17:23:21,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-01-31 17:23:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836161736] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:21,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:21,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-01-31 17:23:21,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525638105] [2024-01-31 17:23:21,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:21,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:23:21,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:21,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:23:21,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:23:21,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:21,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 123 transitions, 1412 flow. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:21,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:21,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:21,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:22,215 INFO L124 PetriNetUnfolderBase]: 345/713 cut-off events. [2024-01-31 17:23:22,215 INFO L125 PetriNetUnfolderBase]: For 4302/4302 co-relation queries the response was YES. [2024-01-31 17:23:22,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3993 conditions, 713 events. 345/713 cut-off events. For 4302/4302 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3668 event pairs, 15 based on Foata normal form. 8/720 useless extension candidates. Maximal degree in co-relation 3824. Up to 319 conditions per place. [2024-01-31 17:23:22,222 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 100 selfloop transitions, 53 changer transitions 29/183 dead transitions. [2024-01-31 17:23:22,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 183 transitions, 2176 flow [2024-01-31 17:23:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:23:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:23:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 148 transitions. [2024-01-31 17:23:22,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37092731829573933 [2024-01-31 17:23:22,224 INFO L175 Difference]: Start difference. First operand has 126 places, 123 transitions, 1412 flow. Second operand 19 states and 148 transitions. [2024-01-31 17:23:22,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 183 transitions, 2176 flow [2024-01-31 17:23:22,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 183 transitions, 2013 flow, removed 77 selfloop flow, removed 2 redundant places. [2024-01-31 17:23:22,243 INFO L231 Difference]: Finished difference. Result has 145 places, 120 transitions, 1386 flow [2024-01-31 17:23:22,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1386, PETRI_PLACES=145, PETRI_TRANSITIONS=120} [2024-01-31 17:23:22,244 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 123 predicate places. [2024-01-31 17:23:22,245 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 120 transitions, 1386 flow [2024-01-31 17:23:22,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:22,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:22,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:22,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:22,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-31 17:23:22,461 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:22,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:22,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1645902709, now seen corresponding path program 4 times [2024-01-31 17:23:22,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:22,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112257569] [2024-01-31 17:23:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:22,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:22,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:22,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112257569] [2024-01-31 17:23:22,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112257569] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:22,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895257284] [2024-01-31 17:23:22,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:23:22,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:22,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:22,606 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:22,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:23:22,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:23:22,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:22,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:22,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:22,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:22,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895257284] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:22,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:22,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:23:22,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932050938] [2024-01-31 17:23:22,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:22,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:23:22,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:22,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:23:22,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:23:22,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:22,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 120 transitions, 1386 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:22,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:22,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:22,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:23,328 INFO L124 PetriNetUnfolderBase]: 318/618 cut-off events. [2024-01-31 17:23:23,329 INFO L125 PetriNetUnfolderBase]: For 5199/5199 co-relation queries the response was YES. [2024-01-31 17:23:23,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 618 events. 318/618 cut-off events. For 5199/5199 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 2946 event pairs, 46 based on Foata normal form. 18/635 useless extension candidates. Maximal degree in co-relation 3650. Up to 198 conditions per place. [2024-01-31 17:23:23,336 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 110 selfloop transitions, 67 changer transitions 1/179 dead transitions. [2024-01-31 17:23:23,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 179 transitions, 2090 flow [2024-01-31 17:23:23,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-01-31 17:23:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-01-31 17:23:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 155 transitions. [2024-01-31 17:23:23,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-01-31 17:23:23,338 INFO L175 Difference]: Start difference. First operand has 145 places, 120 transitions, 1386 flow. Second operand 15 states and 155 transitions. [2024-01-31 17:23:23,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 179 transitions, 2090 flow [2024-01-31 17:23:23,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 179 transitions, 1932 flow, removed 63 selfloop flow, removed 11 redundant places. [2024-01-31 17:23:23,359 INFO L231 Difference]: Finished difference. Result has 131 places, 123 transitions, 1493 flow [2024-01-31 17:23:23,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1493, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2024-01-31 17:23:23,359 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2024-01-31 17:23:23,360 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 1493 flow [2024-01-31 17:23:23,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:23,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:23,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:23,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:23,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 17:23:23,568 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:23,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash 818365597, now seen corresponding path program 5 times [2024-01-31 17:23:23,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:23,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876121664] [2024-01-31 17:23:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:23,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:23,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:23,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876121664] [2024-01-31 17:23:23,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876121664] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:23,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128973847] [2024-01-31 17:23:23,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:23:23,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:23,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:23,704 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:23,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 17:23:23,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:23,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:23,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:23,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:23,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:23,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128973847] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:23,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:23,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:23:23,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11133970] [2024-01-31 17:23:23,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:23,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:23:23,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:23:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:23:23,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:23,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 1493 flow. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 17:23:23,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:23,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:23,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:24,487 INFO L124 PetriNetUnfolderBase]: 492/955 cut-off events. [2024-01-31 17:23:24,488 INFO L125 PetriNetUnfolderBase]: For 9036/9036 co-relation queries the response was YES. [2024-01-31 17:23:24,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5951 conditions, 955 events. 492/955 cut-off events. For 9036/9036 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5132 event pairs, 78 based on Foata normal form. 28/982 useless extension candidates. Maximal degree in co-relation 5890. Up to 488 conditions per place. [2024-01-31 17:23:24,498 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 142 selfloop transitions, 87 changer transitions 2/232 dead transitions. [2024-01-31 17:23:24,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 232 transitions, 2953 flow [2024-01-31 17:23:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:23:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:23:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 162 transitions. [2024-01-31 17:23:24,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453781512605042 [2024-01-31 17:23:24,502 INFO L175 Difference]: Start difference. First operand has 131 places, 123 transitions, 1493 flow. Second operand 17 states and 162 transitions. [2024-01-31 17:23:24,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 232 transitions, 2953 flow [2024-01-31 17:23:24,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 232 transitions, 2715 flow, removed 68 selfloop flow, removed 10 redundant places. [2024-01-31 17:23:24,534 INFO L231 Difference]: Finished difference. Result has 144 places, 170 transitions, 2284 flow [2024-01-31 17:23:24,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2284, PETRI_PLACES=144, PETRI_TRANSITIONS=170} [2024-01-31 17:23:24,535 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 122 predicate places. [2024-01-31 17:23:24,535 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 170 transitions, 2284 flow [2024-01-31 17:23:24,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 17:23:24,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:24,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:24,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:24,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:23:24,752 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:24,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:24,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1179854851, now seen corresponding path program 6 times [2024-01-31 17:23:24,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:24,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633366286] [2024-01-31 17:23:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:24,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:24,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:24,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633366286] [2024-01-31 17:23:24,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633366286] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:24,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707867133] [2024-01-31 17:23:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:23:24,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:24,896 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:24,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 17:23:25,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:23:25,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:25,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:25,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:25,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:25,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707867133] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:25,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:25,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:23:25,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280926850] [2024-01-31 17:23:25,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:25,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:23:25,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:25,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:23:25,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:23:25,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:25,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 170 transitions, 2284 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:25,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:25,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:25,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:25,626 INFO L124 PetriNetUnfolderBase]: 493/923 cut-off events. [2024-01-31 17:23:25,626 INFO L125 PetriNetUnfolderBase]: For 10641/10641 co-relation queries the response was YES. [2024-01-31 17:23:25,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6274 conditions, 923 events. 493/923 cut-off events. For 10641/10641 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4721 event pairs, 78 based on Foata normal form. 18/940 useless extension candidates. Maximal degree in co-relation 6207. Up to 494 conditions per place. [2024-01-31 17:23:25,638 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 132 selfloop transitions, 86 changer transitions 2/221 dead transitions. [2024-01-31 17:23:25,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 221 transitions, 3088 flow [2024-01-31 17:23:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:23:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:23:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 138 transitions. [2024-01-31 17:23:25,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-01-31 17:23:25,639 INFO L175 Difference]: Start difference. First operand has 144 places, 170 transitions, 2284 flow. Second operand 14 states and 138 transitions. [2024-01-31 17:23:25,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 221 transitions, 3088 flow [2024-01-31 17:23:25,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 221 transitions, 2788 flow, removed 128 selfloop flow, removed 8 redundant places. [2024-01-31 17:23:25,684 INFO L231 Difference]: Finished difference. Result has 151 places, 174 transitions, 2305 flow [2024-01-31 17:23:25,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2305, PETRI_PLACES=151, PETRI_TRANSITIONS=174} [2024-01-31 17:23:25,685 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 129 predicate places. [2024-01-31 17:23:25,685 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 174 transitions, 2305 flow [2024-01-31 17:23:25,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:25,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:25,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:25,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:25,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 17:23:25,900 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:25,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1780521115, now seen corresponding path program 7 times [2024-01-31 17:23:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:25,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979519662] [2024-01-31 17:23:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:25,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:26,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979519662] [2024-01-31 17:23:26,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979519662] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373866225] [2024-01-31 17:23:26,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:23:26,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:26,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:26,037 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:26,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 17:23:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:26,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:26,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:26,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:26,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373866225] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:26,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:26,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:23:26,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760997389] [2024-01-31 17:23:26,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:26,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:23:26,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:26,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:23:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:23:26,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:26,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 174 transitions, 2305 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:26,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:26,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:26,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:26,880 INFO L124 PetriNetUnfolderBase]: 724/1371 cut-off events. [2024-01-31 17:23:26,880 INFO L125 PetriNetUnfolderBase]: For 18613/18613 co-relation queries the response was YES. [2024-01-31 17:23:26,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9669 conditions, 1371 events. 724/1371 cut-off events. For 18613/18613 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7697 event pairs, 16 based on Foata normal form. 6/1376 useless extension candidates. Maximal degree in co-relation 9600. Up to 331 conditions per place. [2024-01-31 17:23:26,907 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 178 selfloop transitions, 126 changer transitions 0/305 dead transitions. [2024-01-31 17:23:26,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 305 transitions, 4455 flow [2024-01-31 17:23:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-01-31 17:23:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-01-31 17:23:26,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 177 transitions. [2024-01-31 17:23:26,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2024-01-31 17:23:26,909 INFO L175 Difference]: Start difference. First operand has 151 places, 174 transitions, 2305 flow. Second operand 17 states and 177 transitions. [2024-01-31 17:23:26,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 305 transitions, 4455 flow [2024-01-31 17:23:26,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 305 transitions, 4201 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-01-31 17:23:26,981 INFO L231 Difference]: Finished difference. Result has 165 places, 211 transitions, 3124 flow [2024-01-31 17:23:26,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3124, PETRI_PLACES=165, PETRI_TRANSITIONS=211} [2024-01-31 17:23:26,982 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 143 predicate places. [2024-01-31 17:23:26,982 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 211 transitions, 3124 flow [2024-01-31 17:23:26,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:26,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:26,983 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:26,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-31 17:23:27,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 17:23:27,196 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:27,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1798955141, now seen corresponding path program 8 times [2024-01-31 17:23:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:27,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191860220] [2024-01-31 17:23:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:27,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:27,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:27,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191860220] [2024-01-31 17:23:27,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191860220] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:27,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440394002] [2024-01-31 17:23:27,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:23:27,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:27,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:27,372 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:27,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 17:23:27,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:27,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:27,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:27,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:27,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:27,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440394002] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:27,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:27,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:23:27,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659562431] [2024-01-31 17:23:27,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:27,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:23:27,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:23:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:23:27,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:27,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 211 transitions, 3124 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:27,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:27,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:27,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:28,528 INFO L124 PetriNetUnfolderBase]: 860/1620 cut-off events. [2024-01-31 17:23:28,529 INFO L125 PetriNetUnfolderBase]: For 32274/32274 co-relation queries the response was YES. [2024-01-31 17:23:28,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12615 conditions, 1620 events. 860/1620 cut-off events. For 32274/32274 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9351 event pairs, 60 based on Foata normal form. 14/1633 useless extension candidates. Maximal degree in co-relation 12539. Up to 582 conditions per place. [2024-01-31 17:23:28,545 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 175 selfloop transitions, 154 changer transitions 0/330 dead transitions. [2024-01-31 17:23:28,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 330 transitions, 5100 flow [2024-01-31 17:23:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:23:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:23:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 192 transitions. [2024-01-31 17:23:28,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48120300751879697 [2024-01-31 17:23:28,547 INFO L175 Difference]: Start difference. First operand has 165 places, 211 transitions, 3124 flow. Second operand 19 states and 192 transitions. [2024-01-31 17:23:28,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 330 transitions, 5100 flow [2024-01-31 17:23:28,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 330 transitions, 4729 flow, removed 164 selfloop flow, removed 4 redundant places. [2024-01-31 17:23:28,638 INFO L231 Difference]: Finished difference. Result has 187 places, 247 transitions, 3890 flow [2024-01-31 17:23:28,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=2835, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3890, PETRI_PLACES=187, PETRI_TRANSITIONS=247} [2024-01-31 17:23:28,638 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 165 predicate places. [2024-01-31 17:23:28,639 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 247 transitions, 3890 flow [2024-01-31 17:23:28,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:28,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:28,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:28,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:28,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:28,839 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:28,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash -660589819, now seen corresponding path program 9 times [2024-01-31 17:23:28,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:28,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505338627] [2024-01-31 17:23:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:28,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:28,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505338627] [2024-01-31 17:23:28,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505338627] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:28,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871786578] [2024-01-31 17:23:28,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:23:28,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:28,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:28,995 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:29,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 17:23:29,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:23:29,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:29,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:29,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:29,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:29,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871786578] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:29,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:29,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-01-31 17:23:29,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574878495] [2024-01-31 17:23:29,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:29,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:23:29,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:29,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:23:29,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:23:29,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:29,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 247 transitions, 3890 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:29,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:29,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:29,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:29,826 INFO L124 PetriNetUnfolderBase]: 869/1627 cut-off events. [2024-01-31 17:23:29,826 INFO L125 PetriNetUnfolderBase]: For 35200/35200 co-relation queries the response was YES. [2024-01-31 17:23:29,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13183 conditions, 1627 events. 869/1627 cut-off events. For 35200/35200 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9287 event pairs, 70 based on Foata normal form. 16/1642 useless extension candidates. Maximal degree in co-relation 13101. Up to 626 conditions per place. [2024-01-31 17:23:29,845 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 151 selfloop transitions, 158 changer transitions 0/310 dead transitions. [2024-01-31 17:23:29,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 310 transitions, 5094 flow [2024-01-31 17:23:29,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:23:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:23:29,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 148 transitions. [2024-01-31 17:23:29,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-01-31 17:23:29,850 INFO L175 Difference]: Start difference. First operand has 187 places, 247 transitions, 3890 flow. Second operand 16 states and 148 transitions. [2024-01-31 17:23:29,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 310 transitions, 5094 flow [2024-01-31 17:23:29,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 310 transitions, 4904 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-01-31 17:23:29,958 INFO L231 Difference]: Finished difference. Result has 200 places, 256 transitions, 4326 flow [2024-01-31 17:23:29,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3647, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4326, PETRI_PLACES=200, PETRI_TRANSITIONS=256} [2024-01-31 17:23:29,959 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 178 predicate places. [2024-01-31 17:23:29,959 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 256 transitions, 4326 flow [2024-01-31 17:23:29,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:29,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:29,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:29,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:30,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:30,177 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:30,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:30,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1283324516, now seen corresponding path program 1 times [2024-01-31 17:23:30,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:30,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668483872] [2024-01-31 17:23:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:30,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:30,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:30,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668483872] [2024-01-31 17:23:30,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668483872] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:30,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663350246] [2024-01-31 17:23:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:30,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:30,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:30,321 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:30,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 17:23:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:30,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:23:30,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:30,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:30,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663350246] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:30,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:30,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-01-31 17:23:30,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191657767] [2024-01-31 17:23:30,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:30,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:23:30,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:23:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:23:30,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:30,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 256 transitions, 4326 flow. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 17:23:30,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:30,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:30,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:31,387 INFO L124 PetriNetUnfolderBase]: 780/1498 cut-off events. [2024-01-31 17:23:31,388 INFO L125 PetriNetUnfolderBase]: For 37472/37472 co-relation queries the response was YES. [2024-01-31 17:23:31,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12705 conditions, 1498 events. 780/1498 cut-off events. For 37472/37472 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8590 event pairs, 105 based on Foata normal form. 68/1565 useless extension candidates. Maximal degree in co-relation 12621. Up to 377 conditions per place. [2024-01-31 17:23:31,406 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 150 selfloop transitions, 145 changer transitions 12/308 dead transitions. [2024-01-31 17:23:31,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 308 transitions, 5454 flow [2024-01-31 17:23:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:23:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:23:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 113 transitions. [2024-01-31 17:23:31,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-01-31 17:23:31,408 INFO L175 Difference]: Start difference. First operand has 200 places, 256 transitions, 4326 flow. Second operand 12 states and 113 transitions. [2024-01-31 17:23:31,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 308 transitions, 5454 flow [2024-01-31 17:23:31,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 308 transitions, 5234 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-01-31 17:23:31,546 INFO L231 Difference]: Finished difference. Result has 205 places, 258 transitions, 4656 flow [2024-01-31 17:23:31,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4656, PETRI_PLACES=205, PETRI_TRANSITIONS=258} [2024-01-31 17:23:31,546 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 183 predicate places. [2024-01-31 17:23:31,546 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 258 transitions, 4656 flow [2024-01-31 17:23:31,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 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 17:23:31,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:31,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:31,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:31,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:31,747 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:31,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:31,748 INFO L85 PathProgramCache]: Analyzing trace with hash -599566659, now seen corresponding path program 7 times [2024-01-31 17:23:31,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:31,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36116441] [2024-01-31 17:23:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:31,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:31,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:31,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36116441] [2024-01-31 17:23:31,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36116441] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:31,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520553554] [2024-01-31 17:23:31,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:23:31,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:31,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:31,934 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:31,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 17:23:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:32,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:23:32,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:32,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:32,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520553554] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:32,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:32,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-01-31 17:23:32,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265571394] [2024-01-31 17:23:32,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:32,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:23:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:23:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:23:32,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:32,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 258 transitions, 4656 flow. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:32,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:32,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:32,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:32,692 INFO L124 PetriNetUnfolderBase]: 787/1457 cut-off events. [2024-01-31 17:23:32,692 INFO L125 PetriNetUnfolderBase]: For 39048/39048 co-relation queries the response was YES. [2024-01-31 17:23:32,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13183 conditions, 1457 events. 787/1457 cut-off events. For 39048/39048 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8016 event pairs, 41 based on Foata normal form. 32/1488 useless extension candidates. Maximal degree in co-relation 13096. Up to 365 conditions per place. [2024-01-31 17:23:32,707 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 216 selfloop transitions, 122 changer transitions 3/342 dead transitions. [2024-01-31 17:23:32,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 342 transitions, 6545 flow [2024-01-31 17:23:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-31 17:23:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-31 17:23:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 140 transitions. [2024-01-31 17:23:32,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-31 17:23:32,709 INFO L175 Difference]: Start difference. First operand has 205 places, 258 transitions, 4656 flow. Second operand 14 states and 140 transitions. [2024-01-31 17:23:32,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 342 transitions, 6545 flow [2024-01-31 17:23:32,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 342 transitions, 6073 flow, removed 179 selfloop flow, removed 8 redundant places. [2024-01-31 17:23:32,936 INFO L231 Difference]: Finished difference. Result has 214 places, 271 transitions, 4946 flow [2024-01-31 17:23:32,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4231, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4946, PETRI_PLACES=214, PETRI_TRANSITIONS=271} [2024-01-31 17:23:32,936 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 192 predicate places. [2024-01-31 17:23:32,936 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 271 transitions, 4946 flow [2024-01-31 17:23:32,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:32,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:32,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:32,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:33,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:33,152 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:33,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2109596357, now seen corresponding path program 8 times [2024-01-31 17:23:33,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:33,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127665520] [2024-01-31 17:23:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:33,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:33,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:33,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127665520] [2024-01-31 17:23:33,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127665520] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:33,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119460597] [2024-01-31 17:23:33,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:23:33,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:33,320 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:33,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 17:23:33,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:33,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:33,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:23:33,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:33,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:33,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119460597] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:33,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:33,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2024-01-31 17:23:33,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815172467] [2024-01-31 17:23:33,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:33,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:23:33,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:33,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:23:33,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:23:33,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:33,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 271 transitions, 4946 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:33,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:33,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:33,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:34,345 INFO L124 PetriNetUnfolderBase]: 847/1607 cut-off events. [2024-01-31 17:23:34,345 INFO L125 PetriNetUnfolderBase]: For 33207/33207 co-relation queries the response was YES. [2024-01-31 17:23:34,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13760 conditions, 1607 events. 847/1607 cut-off events. For 33207/33207 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9185 event pairs, 37 based on Foata normal form. 12/1618 useless extension candidates. Maximal degree in co-relation 13670. Up to 577 conditions per place. [2024-01-31 17:23:34,360 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 202 selfloop transitions, 150 changer transitions 4/357 dead transitions. [2024-01-31 17:23:34,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 357 transitions, 6488 flow [2024-01-31 17:23:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-31 17:23:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-31 17:23:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 178 transitions. [2024-01-31 17:23:34,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44611528822055135 [2024-01-31 17:23:34,362 INFO L175 Difference]: Start difference. First operand has 214 places, 271 transitions, 4946 flow. Second operand 19 states and 178 transitions. [2024-01-31 17:23:34,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 357 transitions, 6488 flow [2024-01-31 17:23:34,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 357 transitions, 6102 flow, removed 68 selfloop flow, removed 10 redundant places. [2024-01-31 17:23:34,494 INFO L231 Difference]: Finished difference. Result has 226 places, 292 transitions, 5435 flow [2024-01-31 17:23:34,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5435, PETRI_PLACES=226, PETRI_TRANSITIONS=292} [2024-01-31 17:23:34,495 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 204 predicate places. [2024-01-31 17:23:34,495 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 292 transitions, 5435 flow [2024-01-31 17:23:34,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:34,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:34,495 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:34,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:34,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:34,708 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:34,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash -798911359, now seen corresponding path program 9 times [2024-01-31 17:23:34,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:34,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016147773] [2024-01-31 17:23:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:34,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016147773] [2024-01-31 17:23:34,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016147773] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105691192] [2024-01-31 17:23:34,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:23:34,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:34,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:34,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:34,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 17:23:34,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:23:34,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:34,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:34,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:35,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:35,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105691192] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:35,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:35,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:23:35,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076188580] [2024-01-31 17:23:35,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:35,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:23:35,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:35,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:23:35,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:23:35,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:35,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 292 transitions, 5435 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:35,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:35,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:35,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:35,672 INFO L124 PetriNetUnfolderBase]: 950/1815 cut-off events. [2024-01-31 17:23:35,672 INFO L125 PetriNetUnfolderBase]: For 33803/33803 co-relation queries the response was YES. [2024-01-31 17:23:35,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15183 conditions, 1815 events. 950/1815 cut-off events. For 33803/33803 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10706 event pairs, 238 based on Foata normal form. 12/1826 useless extension candidates. Maximal degree in co-relation 15096. Up to 913 conditions per place. [2024-01-31 17:23:35,688 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 244 selfloop transitions, 109 changer transitions 0/354 dead transitions. [2024-01-31 17:23:35,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 354 transitions, 6759 flow [2024-01-31 17:23:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:23:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:23:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 122 transitions. [2024-01-31 17:23:35,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-01-31 17:23:35,690 INFO L175 Difference]: Start difference. First operand has 226 places, 292 transitions, 5435 flow. Second operand 12 states and 122 transitions. [2024-01-31 17:23:35,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 354 transitions, 6759 flow [2024-01-31 17:23:35,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 354 transitions, 6550 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-01-31 17:23:35,849 INFO L231 Difference]: Finished difference. Result has 231 places, 301 transitions, 5727 flow [2024-01-31 17:23:35,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5234, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5727, PETRI_PLACES=231, PETRI_TRANSITIONS=301} [2024-01-31 17:23:35,850 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 209 predicate places. [2024-01-31 17:23:35,850 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 301 transitions, 5727 flow [2024-01-31 17:23:35,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:35,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:35,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:35,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:36,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:36,060 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:36,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1672652039, now seen corresponding path program 10 times [2024-01-31 17:23:36,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:36,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861340514] [2024-01-31 17:23:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:36,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:36,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:36,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861340514] [2024-01-31 17:23:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861340514] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134973269] [2024-01-31 17:23:36,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:23:36,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:36,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:36,217 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:36,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 17:23:36,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:23:36,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:36,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-31 17:23:36,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:36,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:36,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134973269] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:36,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:36,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-01-31 17:23:36,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026157131] [2024-01-31 17:23:36,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:36,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:23:36,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:23:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:23:36,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:36,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 301 transitions, 5727 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:36,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:36,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:36,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:40,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:23:40,620 INFO L124 PetriNetUnfolderBase]: 1028/1971 cut-off events. [2024-01-31 17:23:40,620 INFO L125 PetriNetUnfolderBase]: For 38445/38445 co-relation queries the response was YES. [2024-01-31 17:23:40,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16906 conditions, 1971 events. 1028/1971 cut-off events. For 38445/38445 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11956 event pairs, 157 based on Foata normal form. 2/1972 useless extension candidates. Maximal degree in co-relation 16816. Up to 683 conditions per place. [2024-01-31 17:23:40,634 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 246 selfloop transitions, 122 changer transitions 2/371 dead transitions. [2024-01-31 17:23:40,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 371 transitions, 7387 flow [2024-01-31 17:23:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:23:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:23:40,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 137 transitions. [2024-01-31 17:23:40,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-01-31 17:23:40,642 INFO L175 Difference]: Start difference. First operand has 231 places, 301 transitions, 5727 flow. Second operand 16 states and 137 transitions. [2024-01-31 17:23:40,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 371 transitions, 7387 flow [2024-01-31 17:23:40,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 371 transitions, 7269 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-01-31 17:23:40,758 INFO L231 Difference]: Finished difference. Result has 239 places, 309 transitions, 6098 flow [2024-01-31 17:23:40,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6098, PETRI_PLACES=239, PETRI_TRANSITIONS=309} [2024-01-31 17:23:40,759 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 217 predicate places. [2024-01-31 17:23:40,759 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 309 transitions, 6098 flow [2024-01-31 17:23:40,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:40,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:40,759 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:40,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:40,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-31 17:23:40,960 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:40,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1193997861, now seen corresponding path program 11 times [2024-01-31 17:23:40,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:40,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230753376] [2024-01-31 17:23:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:41,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:41,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230753376] [2024-01-31 17:23:41,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230753376] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:41,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659040365] [2024-01-31 17:23:41,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:23:41,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:41,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:41,077 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:41,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 17:23:41,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:41,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:41,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:23:41,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:41,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:41,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659040365] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:41,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:41,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-01-31 17:23:41,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860077983] [2024-01-31 17:23:41,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:41,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-31 17:23:41,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:41,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-31 17:23:41,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-01-31 17:23:41,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:41,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 309 transitions, 6098 flow. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:41,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:41,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:41,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:42,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:23:43,155 INFO L124 PetriNetUnfolderBase]: 1045/2026 cut-off events. [2024-01-31 17:23:43,156 INFO L125 PetriNetUnfolderBase]: For 40148/40148 co-relation queries the response was YES. [2024-01-31 17:23:43,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17521 conditions, 2026 events. 1045/2026 cut-off events. For 40148/40148 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12523 event pairs, 248 based on Foata normal form. 6/2031 useless extension candidates. Maximal degree in co-relation 17430. Up to 1398 conditions per place. [2024-01-31 17:23:43,177 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 253 selfloop transitions, 98 changer transitions 0/352 dead transitions. [2024-01-31 17:23:43,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 352 transitions, 7128 flow [2024-01-31 17:23:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 17:23:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 17:23:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 109 transitions. [2024-01-31 17:23:43,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-01-31 17:23:43,179 INFO L175 Difference]: Start difference. First operand has 239 places, 309 transitions, 6098 flow. Second operand 12 states and 109 transitions. [2024-01-31 17:23:43,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 352 transitions, 7128 flow [2024-01-31 17:23:43,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 352 transitions, 6938 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-01-31 17:23:43,329 INFO L231 Difference]: Finished difference. Result has 238 places, 313 transitions, 6226 flow [2024-01-31 17:23:43,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6226, PETRI_PLACES=238, PETRI_TRANSITIONS=313} [2024-01-31 17:23:43,330 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 216 predicate places. [2024-01-31 17:23:43,330 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 313 transitions, 6226 flow [2024-01-31 17:23:43,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:43,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:43,331 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:43,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-01-31 17:23:43,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-31 17:23:43,531 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:43,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2115968991, now seen corresponding path program 12 times [2024-01-31 17:23:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:43,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481643682] [2024-01-31 17:23:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:43,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:43,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481643682] [2024-01-31 17:23:43,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481643682] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:43,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195629911] [2024-01-31 17:23:43,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:23:43,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:43,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:43,697 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:43,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-31 17:23:43,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:23:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:43,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 17:23:43,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:43,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:43,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195629911] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:43,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:43,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-01-31 17:23:43,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106950933] [2024-01-31 17:23:43,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:43,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-31 17:23:43,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:43,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-31 17:23:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-01-31 17:23:44,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:44,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 313 transitions, 6226 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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 17:23:44,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:44,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:44,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:45,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:23:45,855 INFO L124 PetriNetUnfolderBase]: 1068/2077 cut-off events. [2024-01-31 17:23:45,855 INFO L125 PetriNetUnfolderBase]: For 41816/41816 co-relation queries the response was YES. [2024-01-31 17:23:45,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18267 conditions, 2077 events. 1068/2077 cut-off events. For 41816/41816 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12948 event pairs, 246 based on Foata normal form. 2/2078 useless extension candidates. Maximal degree in co-relation 18178. Up to 1098 conditions per place. [2024-01-31 17:23:45,872 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 284 selfloop transitions, 71 changer transitions 2/358 dead transitions. [2024-01-31 17:23:45,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 358 transitions, 7480 flow [2024-01-31 17:23:45,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-31 17:23:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-31 17:23:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 104 transitions. [2024-01-31 17:23:45,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-01-31 17:23:45,875 INFO L175 Difference]: Start difference. First operand has 238 places, 313 transitions, 6226 flow. Second operand 13 states and 104 transitions. [2024-01-31 17:23:45,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 358 transitions, 7480 flow [2024-01-31 17:23:46,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 358 transitions, 7340 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-01-31 17:23:46,011 INFO L231 Difference]: Finished difference. Result has 242 places, 310 transitions, 6175 flow [2024-01-31 17:23:46,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6053, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6175, PETRI_PLACES=242, PETRI_TRANSITIONS=310} [2024-01-31 17:23:46,011 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 220 predicate places. [2024-01-31 17:23:46,012 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 310 transitions, 6175 flow [2024-01-31 17:23:46,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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 17:23:46,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:46,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:46,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-31 17:23:46,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-31 17:23:46,226 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:46,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:46,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1652231713, now seen corresponding path program 10 times [2024-01-31 17:23:46,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:46,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835952689] [2024-01-31 17:23:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:46,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:46,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:46,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835952689] [2024-01-31 17:23:46,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835952689] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:46,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760082090] [2024-01-31 17:23:46,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:23:46,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:46,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:46,374 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:46,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-31 17:23:46,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:23:46,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:46,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:23:46,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:46,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:46,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760082090] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:46,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:46,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-01-31 17:23:46,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358692586] [2024-01-31 17:23:46,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:46,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-31 17:23:46,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:46,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-31 17:23:46,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-01-31 17:23:46,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:46,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 310 transitions, 6175 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:46,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:46,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:46,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:47,429 INFO L124 PetriNetUnfolderBase]: 1078/2105 cut-off events. [2024-01-31 17:23:47,429 INFO L125 PetriNetUnfolderBase]: For 42686/42686 co-relation queries the response was YES. [2024-01-31 17:23:47,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18422 conditions, 2105 events. 1078/2105 cut-off events. For 42686/42686 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 13125 event pairs, 172 based on Foata normal form. 24/2128 useless extension candidates. Maximal degree in co-relation 18334. Up to 896 conditions per place. [2024-01-31 17:23:47,444 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 242 selfloop transitions, 116 changer transitions 0/359 dead transitions. [2024-01-31 17:23:47,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 359 transitions, 7226 flow [2024-01-31 17:23:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-01-31 17:23:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-01-31 17:23:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 134 transitions. [2024-01-31 17:23:47,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-01-31 17:23:47,445 INFO L175 Difference]: Start difference. First operand has 242 places, 310 transitions, 6175 flow. Second operand 16 states and 134 transitions. [2024-01-31 17:23:47,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 359 transitions, 7226 flow [2024-01-31 17:23:47,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 359 transitions, 6963 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-01-31 17:23:47,574 INFO L231 Difference]: Finished difference. Result has 244 places, 315 transitions, 6249 flow [2024-01-31 17:23:47,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6249, PETRI_PLACES=244, PETRI_TRANSITIONS=315} [2024-01-31 17:23:47,575 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 222 predicate places. [2024-01-31 17:23:47,575 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 315 transitions, 6249 flow [2024-01-31 17:23:47,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:47,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:47,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:47,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-01-31 17:23:47,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:47,777 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:47,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1535468623, now seen corresponding path program 2 times [2024-01-31 17:23:47,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:47,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572442529] [2024-01-31 17:23:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:47,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:48,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:48,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572442529] [2024-01-31 17:23:48,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572442529] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:48,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384159962] [2024-01-31 17:23:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:23:48,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:48,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:48,878 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:48,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-31 17:23:48,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:23:48,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:48,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:23:48,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:49,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:49,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-01-31 17:23:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:49,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:49,554 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:23:49,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:23:49,627 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:23:49,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:23:49,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:49,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384159962] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:49,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:49,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-31 17:23:49,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180362451] [2024-01-31 17:23:49,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:49,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:23:49,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:49,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:23:49,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:23:49,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:49,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 315 transitions, 6249 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:49,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:49,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:49,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:51,421 INFO L124 PetriNetUnfolderBase]: 1370/2658 cut-off events. [2024-01-31 17:23:51,422 INFO L125 PetriNetUnfolderBase]: For 52470/52470 co-relation queries the response was YES. [2024-01-31 17:23:51,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23524 conditions, 2658 events. 1370/2658 cut-off events. For 52470/52470 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17483 event pairs, 161 based on Foata normal form. 7/2663 useless extension candidates. Maximal degree in co-relation 23363. Up to 2006 conditions per place. [2024-01-31 17:23:51,444 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 368 selfloop transitions, 135 changer transitions 14/518 dead transitions. [2024-01-31 17:23:51,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 518 transitions, 9845 flow [2024-01-31 17:23:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:23:51,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:23:51,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 251 transitions. [2024-01-31 17:23:51,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426807760141093 [2024-01-31 17:23:51,445 INFO L175 Difference]: Start difference. First operand has 244 places, 315 transitions, 6249 flow. Second operand 27 states and 251 transitions. [2024-01-31 17:23:51,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 518 transitions, 9845 flow [2024-01-31 17:23:51,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 518 transitions, 9684 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-01-31 17:23:51,613 INFO L231 Difference]: Finished difference. Result has 272 places, 413 transitions, 8338 flow [2024-01-31 17:23:51,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=6155, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8338, PETRI_PLACES=272, PETRI_TRANSITIONS=413} [2024-01-31 17:23:51,614 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 250 predicate places. [2024-01-31 17:23:51,614 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 413 transitions, 8338 flow [2024-01-31 17:23:51,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:51,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:51,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:51,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-01-31 17:23:51,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-01-31 17:23:51,829 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:51,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1699117443, now seen corresponding path program 3 times [2024-01-31 17:23:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:51,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281769022] [2024-01-31 17:23:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:52,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281769022] [2024-01-31 17:23:52,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281769022] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321883372] [2024-01-31 17:23:52,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:23:52,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:52,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:52,765 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:52,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-31 17:23:52,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:23:52,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:52,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:23:52,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:53,093 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:53,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-01-31 17:23:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:53,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:53,516 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:23:53,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:23:53,587 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:23:53,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:23:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:53,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321883372] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:53,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:53,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2024-01-31 17:23:53,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44573717] [2024-01-31 17:23:53,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:53,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:23:53,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:53,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:23:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:23:53,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:53,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 413 transitions, 8338 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:53,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:53,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:53,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:54,997 INFO L124 PetriNetUnfolderBase]: 1370/2653 cut-off events. [2024-01-31 17:23:54,997 INFO L125 PetriNetUnfolderBase]: For 55543/55543 co-relation queries the response was YES. [2024-01-31 17:23:55,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24461 conditions, 2653 events. 1370/2653 cut-off events. For 55543/55543 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17393 event pairs, 140 based on Foata normal form. 1/2653 useless extension candidates. Maximal degree in co-relation 24291. Up to 2154 conditions per place. [2024-01-31 17:23:55,022 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 382 selfloop transitions, 108 changer transitions 11/502 dead transitions. [2024-01-31 17:23:55,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 502 transitions, 10080 flow [2024-01-31 17:23:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-01-31 17:23:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-01-31 17:23:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 212 transitions. [2024-01-31 17:23:55,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4389233954451346 [2024-01-31 17:23:55,024 INFO L175 Difference]: Start difference. First operand has 272 places, 413 transitions, 8338 flow. Second operand 23 states and 212 transitions. [2024-01-31 17:23:55,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 502 transitions, 10080 flow [2024-01-31 17:23:55,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 502 transitions, 9836 flow, removed 112 selfloop flow, removed 4 redundant places. [2024-01-31 17:23:55,228 INFO L231 Difference]: Finished difference. Result has 293 places, 427 transitions, 8654 flow [2024-01-31 17:23:55,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8125, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8654, PETRI_PLACES=293, PETRI_TRANSITIONS=427} [2024-01-31 17:23:55,229 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 271 predicate places. [2024-01-31 17:23:55,229 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 427 transitions, 8654 flow [2024-01-31 17:23:55,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:55,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:55,229 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:55,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-01-31 17:23:55,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:55,430 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:55,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash -760427517, now seen corresponding path program 4 times [2024-01-31 17:23:55,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:55,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031042396] [2024-01-31 17:23:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:55,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:23:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:23:56,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:23:56,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031042396] [2024-01-31 17:23:56,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031042396] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:23:56,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760865249] [2024-01-31 17:23:56,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:23:56,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:23:56,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:23:56,364 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:23:56,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-31 17:23:56,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:23:56,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:23:56,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:23:56,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:23:56,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:23:56,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-01-31 17:23:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:23:56,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:23:57,044 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:23:57,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:23:57,166 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:23:57,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:23:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:23:57,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760865249] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:23:57,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:23:57,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-01-31 17:23:57,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775205014] [2024-01-31 17:23:57,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:23:57,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:23:57,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:23:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:23:57,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:23:57,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:23:57,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 427 transitions, 8654 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:57,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:23:57,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:23:57,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:23:58,864 INFO L124 PetriNetUnfolderBase]: 1404/2712 cut-off events. [2024-01-31 17:23:58,864 INFO L125 PetriNetUnfolderBase]: For 58547/58547 co-relation queries the response was YES. [2024-01-31 17:23:58,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25009 conditions, 2712 events. 1404/2712 cut-off events. For 58547/58547 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17757 event pairs, 153 based on Foata normal form. 3/2715 useless extension candidates. Maximal degree in co-relation 24837. Up to 2181 conditions per place. [2024-01-31 17:23:58,885 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 392 selfloop transitions, 123 changer transitions 14/530 dead transitions. [2024-01-31 17:23:58,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 530 transitions, 10475 flow [2024-01-31 17:23:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:23:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:23:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 251 transitions. [2024-01-31 17:23:58,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4597069597069597 [2024-01-31 17:23:58,887 INFO L175 Difference]: Start difference. First operand has 293 places, 427 transitions, 8654 flow. Second operand 26 states and 251 transitions. [2024-01-31 17:23:58,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 530 transitions, 10475 flow [2024-01-31 17:23:59,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 530 transitions, 10356 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-01-31 17:23:59,075 INFO L231 Difference]: Finished difference. Result has 312 places, 438 transitions, 9032 flow [2024-01-31 17:23:59,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8561, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9032, PETRI_PLACES=312, PETRI_TRANSITIONS=438} [2024-01-31 17:23:59,075 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 290 predicate places. [2024-01-31 17:23:59,075 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 438 transitions, 9032 flow [2024-01-31 17:23:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:23:59,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:23:59,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:23:59,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-01-31 17:23:59,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-01-31 17:23:59,280 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:23:59,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:23:59,281 INFO L85 PathProgramCache]: Analyzing trace with hash 283515967, now seen corresponding path program 5 times [2024-01-31 17:23:59,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:23:59,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810099937] [2024-01-31 17:23:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:23:59,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:23:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:00,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:00,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810099937] [2024-01-31 17:24:00,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810099937] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:00,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64004889] [2024-01-31 17:24:00,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:24:00,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:00,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:00,120 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:00,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-01-31 17:24:00,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:24:00,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:00,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:24:00,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:00,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:00,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-01-31 17:24:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:00,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:00,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:00,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2024-01-31 17:24:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64004889] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:01,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:01,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2024-01-31 17:24:01,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483922640] [2024-01-31 17:24:01,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:01,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:24:01,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:01,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:24:01,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:24:01,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:01,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 438 transitions, 9032 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:01,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:01,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:01,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:02,876 INFO L124 PetriNetUnfolderBase]: 1479/2835 cut-off events. [2024-01-31 17:24:02,877 INFO L125 PetriNetUnfolderBase]: For 63804/63804 co-relation queries the response was YES. [2024-01-31 17:24:02,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26670 conditions, 2835 events. 1479/2835 cut-off events. For 63804/63804 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18568 event pairs, 229 based on Foata normal form. 4/2839 useless extension candidates. Maximal degree in co-relation 26494. Up to 2518 conditions per place. [2024-01-31 17:24:02,907 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 439 selfloop transitions, 91 changer transitions 16/547 dead transitions. [2024-01-31 17:24:02,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 547 transitions, 11234 flow [2024-01-31 17:24:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:24:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:24:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 249 transitions. [2024-01-31 17:24:02,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-01-31 17:24:02,908 INFO L175 Difference]: Start difference. First operand has 312 places, 438 transitions, 9032 flow. Second operand 28 states and 249 transitions. [2024-01-31 17:24:02,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 547 transitions, 11234 flow [2024-01-31 17:24:03,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 547 transitions, 10983 flow, removed 24 selfloop flow, removed 22 redundant places. [2024-01-31 17:24:03,137 INFO L231 Difference]: Finished difference. Result has 325 places, 469 transitions, 9710 flow [2024-01-31 17:24:03,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=8781, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9710, PETRI_PLACES=325, PETRI_TRANSITIONS=469} [2024-01-31 17:24:03,138 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 303 predicate places. [2024-01-31 17:24:03,138 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 469 transitions, 9710 flow [2024-01-31 17:24:03,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:03,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:03,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:03,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-01-31 17:24:03,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:03,339 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:03,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:03,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1812063377, now seen corresponding path program 6 times [2024-01-31 17:24:03,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:03,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070003312] [2024-01-31 17:24:03,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:03,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:04,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:04,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070003312] [2024-01-31 17:24:04,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070003312] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:04,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985163799] [2024-01-31 17:24:04,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:24:04,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:04,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:04,284 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:04,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-01-31 17:24:04,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:24:04,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:04,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:24:04,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:04,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:04,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-01-31 17:24:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:04,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:05,022 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:05,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:24:05,077 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:24:05,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:24:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:05,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985163799] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:05,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:05,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-31 17:24:05,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789153097] [2024-01-31 17:24:05,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:05,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:24:05,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:05,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:24:05,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:24:05,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:05,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 469 transitions, 9710 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:05,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:05,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:05,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:06,790 INFO L124 PetriNetUnfolderBase]: 1533/2919 cut-off events. [2024-01-31 17:24:06,790 INFO L125 PetriNetUnfolderBase]: For 72140/72140 co-relation queries the response was YES. [2024-01-31 17:24:06,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28229 conditions, 2919 events. 1533/2919 cut-off events. For 72140/72140 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19096 event pairs, 228 based on Foata normal form. 3/2922 useless extension candidates. Maximal degree in co-relation 28046. Up to 2597 conditions per place. [2024-01-31 17:24:06,819 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 461 selfloop transitions, 86 changer transitions 14/562 dead transitions. [2024-01-31 17:24:06,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 562 transitions, 11714 flow [2024-01-31 17:24:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 17:24:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 17:24:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 226 transitions. [2024-01-31 17:24:06,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43047619047619046 [2024-01-31 17:24:06,820 INFO L175 Difference]: Start difference. First operand has 325 places, 469 transitions, 9710 flow. Second operand 25 states and 226 transitions. [2024-01-31 17:24:06,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 562 transitions, 11714 flow [2024-01-31 17:24:07,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 562 transitions, 11341 flow, removed 128 selfloop flow, removed 17 redundant places. [2024-01-31 17:24:07,066 INFO L231 Difference]: Finished difference. Result has 337 places, 488 transitions, 10025 flow [2024-01-31 17:24:07,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9337, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=10025, PETRI_PLACES=337, PETRI_TRANSITIONS=488} [2024-01-31 17:24:07,066 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 315 predicate places. [2024-01-31 17:24:07,066 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 488 transitions, 10025 flow [2024-01-31 17:24:07,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:07,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:07,067 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:07,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-01-31 17:24:07,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:07,267 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:07,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash 626032063, now seen corresponding path program 7 times [2024-01-31 17:24:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:07,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008673302] [2024-01-31 17:24:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:08,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:08,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008673302] [2024-01-31 17:24:08,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008673302] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:08,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126912360] [2024-01-31 17:24:08,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:24:08,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:08,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:08,121 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:08,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-01-31 17:24:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:08,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:24:08,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:08,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:08,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-01-31 17:24:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:08,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:08,788 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:08,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:24:08,862 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:24:08,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:24:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:08,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126912360] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:08,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:08,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 25 [2024-01-31 17:24:08,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440585110] [2024-01-31 17:24:08,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:08,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:24:08,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:08,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:24:08,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:24:08,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:08,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 488 transitions, 10025 flow. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:08,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:08,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:08,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:10,195 INFO L124 PetriNetUnfolderBase]: 1553/2970 cut-off events. [2024-01-31 17:24:10,196 INFO L125 PetriNetUnfolderBase]: For 77235/77235 co-relation queries the response was YES. [2024-01-31 17:24:10,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28995 conditions, 2970 events. 1553/2970 cut-off events. For 77235/77235 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 19623 event pairs, 227 based on Foata normal form. 2/2972 useless extension candidates. Maximal degree in co-relation 28808. Up to 2616 conditions per place. [2024-01-31 17:24:10,225 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 474 selfloop transitions, 84 changer transitions 22/581 dead transitions. [2024-01-31 17:24:10,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 581 transitions, 11920 flow [2024-01-31 17:24:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:24:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:24:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 243 transitions. [2024-01-31 17:24:10,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-01-31 17:24:10,226 INFO L175 Difference]: Start difference. First operand has 337 places, 488 transitions, 10025 flow. Second operand 27 states and 243 transitions. [2024-01-31 17:24:10,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 581 transitions, 11920 flow [2024-01-31 17:24:10,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 581 transitions, 11624 flow, removed 114 selfloop flow, removed 12 redundant places. [2024-01-31 17:24:10,496 INFO L231 Difference]: Finished difference. Result has 358 places, 496 transitions, 10125 flow [2024-01-31 17:24:10,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9759, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=10125, PETRI_PLACES=358, PETRI_TRANSITIONS=496} [2024-01-31 17:24:10,496 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 336 predicate places. [2024-01-31 17:24:10,496 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 496 transitions, 10125 flow [2024-01-31 17:24:10,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:10,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:10,497 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:10,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-01-31 17:24:10,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:10,698 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:10,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:10,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1986398877, now seen corresponding path program 8 times [2024-01-31 17:24:10,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:10,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353230723] [2024-01-31 17:24:10,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:10,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353230723] [2024-01-31 17:24:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353230723] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:11,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14225007] [2024-01-31 17:24:11,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:24:11,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:11,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:11,464 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:11,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-01-31 17:24:11,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:24:11,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:11,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:24:11,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:11,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:11,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-01-31 17:24:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:11,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:12,196 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:12,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:24:12,247 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:24:12,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:24:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:12,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14225007] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:12,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:12,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-01-31 17:24:12,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664283784] [2024-01-31 17:24:12,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:12,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:24:12,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:12,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:24:12,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:24:12,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:12,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 496 transitions, 10125 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:12,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:12,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:12,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:13,533 INFO L124 PetriNetUnfolderBase]: 1575/3002 cut-off events. [2024-01-31 17:24:13,533 INFO L125 PetriNetUnfolderBase]: For 83538/83538 co-relation queries the response was YES. [2024-01-31 17:24:13,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29711 conditions, 3002 events. 1575/3002 cut-off events. For 83538/83538 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19762 event pairs, 242 based on Foata normal form. 2/3004 useless extension candidates. Maximal degree in co-relation 29516. Up to 2663 conditions per place. [2024-01-31 17:24:13,565 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 450 selfloop transitions, 98 changer transitions 9/558 dead transitions. [2024-01-31 17:24:13,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 558 transitions, 12055 flow [2024-01-31 17:24:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:24:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:24:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 160 transitions. [2024-01-31 17:24:13,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-01-31 17:24:13,566 INFO L175 Difference]: Start difference. First operand has 358 places, 496 transitions, 10125 flow. Second operand 20 states and 160 transitions. [2024-01-31 17:24:13,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 558 transitions, 12055 flow [2024-01-31 17:24:13,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 558 transitions, 11897 flow, removed 21 selfloop flow, removed 21 redundant places. [2024-01-31 17:24:13,873 INFO L231 Difference]: Finished difference. Result has 360 places, 518 transitions, 10846 flow [2024-01-31 17:24:13,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=9967, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=10846, PETRI_PLACES=360, PETRI_TRANSITIONS=518} [2024-01-31 17:24:13,874 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 338 predicate places. [2024-01-31 17:24:13,874 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 518 transitions, 10846 flow [2024-01-31 17:24:13,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:13,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:13,875 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:13,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:14,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-01-31 17:24:14,089 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:14,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1434827739, now seen corresponding path program 9 times [2024-01-31 17:24:14,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:14,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411676406] [2024-01-31 17:24:14,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:14,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:14,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:14,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411676406] [2024-01-31 17:24:14,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411676406] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:14,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121367731] [2024-01-31 17:24:14,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:24:14,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:14,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:14,772 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:14,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-01-31 17:24:14,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:24:14,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:14,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:24:14,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:15,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:15,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-01-31 17:24:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:15,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:15,422 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:15,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:24:15,489 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:24:15,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:24:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:15,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121367731] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:15,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:15,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2024-01-31 17:24:15,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053335494] [2024-01-31 17:24:15,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:15,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:24:15,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:15,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:24:15,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:24:15,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:15,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 518 transitions, 10846 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:15,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:15,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:15,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:16,828 INFO L124 PetriNetUnfolderBase]: 1578/3014 cut-off events. [2024-01-31 17:24:16,828 INFO L125 PetriNetUnfolderBase]: For 90126/90126 co-relation queries the response was YES. [2024-01-31 17:24:16,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30445 conditions, 3014 events. 1578/3014 cut-off events. For 90126/90126 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19934 event pairs, 230 based on Foata normal form. 2/3016 useless extension candidates. Maximal degree in co-relation 30245. Up to 2713 conditions per place. [2024-01-31 17:24:16,858 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 478 selfloop transitions, 86 changer transitions 13/578 dead transitions. [2024-01-31 17:24:16,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 578 transitions, 12443 flow [2024-01-31 17:24:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-31 17:24:16,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-31 17:24:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 198 transitions. [2024-01-31 17:24:16,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-01-31 17:24:16,859 INFO L175 Difference]: Start difference. First operand has 360 places, 518 transitions, 10846 flow. Second operand 24 states and 198 transitions. [2024-01-31 17:24:16,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 578 transitions, 12443 flow [2024-01-31 17:24:17,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 578 transitions, 12158 flow, removed 104 selfloop flow, removed 12 redundant places. [2024-01-31 17:24:17,203 INFO L231 Difference]: Finished difference. Result has 374 places, 520 transitions, 10804 flow [2024-01-31 17:24:17,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10561, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10804, PETRI_PLACES=374, PETRI_TRANSITIONS=520} [2024-01-31 17:24:17,204 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 352 predicate places. [2024-01-31 17:24:17,204 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 520 transitions, 10804 flow [2024-01-31 17:24:17,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:17,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:17,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:17,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-01-31 17:24:17,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-01-31 17:24:17,412 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:17,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:17,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1516135705, now seen corresponding path program 10 times [2024-01-31 17:24:17,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:17,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723240420] [2024-01-31 17:24:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:18,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:18,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723240420] [2024-01-31 17:24:18,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723240420] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:18,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172216352] [2024-01-31 17:24:18,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:24:18,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:18,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:18,209 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:18,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-01-31 17:24:18,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:24:18,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:18,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:24:18,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:18,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:18,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-01-31 17:24:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:18,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:18,845 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:24:18,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:24:18,996 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:18,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:24:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:19,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172216352] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:19,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:19,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-01-31 17:24:19,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264324543] [2024-01-31 17:24:19,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:19,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:24:19,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:19,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:24:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:24:19,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:19,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 520 transitions, 10804 flow. Second operand has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:19,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:19,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:19,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:20,749 INFO L124 PetriNetUnfolderBase]: 1653/3137 cut-off events. [2024-01-31 17:24:20,750 INFO L125 PetriNetUnfolderBase]: For 99501/99501 co-relation queries the response was YES. [2024-01-31 17:24:20,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32045 conditions, 3137 events. 1653/3137 cut-off events. For 99501/99501 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20854 event pairs, 240 based on Foata normal form. 8/3145 useless extension candidates. Maximal degree in co-relation 31841. Up to 2877 conditions per place. [2024-01-31 17:24:20,786 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 528 selfloop transitions, 75 changer transitions 14/618 dead transitions. [2024-01-31 17:24:20,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 618 transitions, 13157 flow [2024-01-31 17:24:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:24:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:24:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 241 transitions. [2024-01-31 17:24:20,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098639455782313 [2024-01-31 17:24:20,788 INFO L175 Difference]: Start difference. First operand has 374 places, 520 transitions, 10804 flow. Second operand 28 states and 241 transitions. [2024-01-31 17:24:20,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 618 transitions, 13157 flow [2024-01-31 17:24:21,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 618 transitions, 12977 flow, removed 30 selfloop flow, removed 20 redundant places. [2024-01-31 17:24:21,229 INFO L231 Difference]: Finished difference. Result has 388 places, 545 transitions, 11501 flow [2024-01-31 17:24:21,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=10624, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11501, PETRI_PLACES=388, PETRI_TRANSITIONS=545} [2024-01-31 17:24:21,230 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 366 predicate places. [2024-01-31 17:24:21,231 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 545 transitions, 11501 flow [2024-01-31 17:24:21,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.851851851851852) internal successors, (131), 27 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:21,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:21,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:21,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:21,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:21,446 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:21,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:21,446 INFO L85 PathProgramCache]: Analyzing trace with hash -340736151, now seen corresponding path program 11 times [2024-01-31 17:24:21,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:21,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387151517] [2024-01-31 17:24:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:21,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:22,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:22,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387151517] [2024-01-31 17:24:22,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387151517] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:22,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812708036] [2024-01-31 17:24:22,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:24:22,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:22,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:22,107 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:22,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-01-31 17:24:22,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:24:22,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:22,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:24:22,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:22,427 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:22,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-01-31 17:24:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:22,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:22,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:22,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 137 treesize of output 162 [2024-01-31 17:24:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:23,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812708036] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:23,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:23,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2024-01-31 17:24:23,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988073213] [2024-01-31 17:24:23,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:23,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:24:23,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:23,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:24:23,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:24:23,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:23,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 545 transitions, 11501 flow. Second operand has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:23,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:23,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:23,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:24,379 INFO L124 PetriNetUnfolderBase]: 1647/3126 cut-off events. [2024-01-31 17:24:24,380 INFO L125 PetriNetUnfolderBase]: For 110883/110883 co-relation queries the response was YES. [2024-01-31 17:24:24,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32750 conditions, 3126 events. 1647/3126 cut-off events. For 110883/110883 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20654 event pairs, 228 based on Foata normal form. 2/3128 useless extension candidates. Maximal degree in co-relation 32538. Up to 2888 conditions per place. [2024-01-31 17:24:24,522 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 524 selfloop transitions, 67 changer transitions 10/602 dead transitions. [2024-01-31 17:24:24,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 602 transitions, 13149 flow [2024-01-31 17:24:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 17:24:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 17:24:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 203 transitions. [2024-01-31 17:24:24,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-01-31 17:24:24,523 INFO L175 Difference]: Start difference. First operand has 388 places, 545 transitions, 11501 flow. Second operand 25 states and 203 transitions. [2024-01-31 17:24:24,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 602 transitions, 13149 flow [2024-01-31 17:24:25,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 602 transitions, 12732 flow, removed 151 selfloop flow, removed 19 redundant places. [2024-01-31 17:24:25,069 INFO L231 Difference]: Finished difference. Result has 396 places, 547 transitions, 11297 flow [2024-01-31 17:24:25,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11084, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11297, PETRI_PLACES=396, PETRI_TRANSITIONS=547} [2024-01-31 17:24:25,070 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 374 predicate places. [2024-01-31 17:24:25,070 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 547 transitions, 11297 flow [2024-01-31 17:24:25,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.769230769230769) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:25,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:25,071 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:25,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:25,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-01-31 17:24:25,286 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:25,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:25,287 INFO L85 PathProgramCache]: Analyzing trace with hash 171385601, now seen corresponding path program 11 times [2024-01-31 17:24:25,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:25,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243423454] [2024-01-31 17:24:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:25,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:25,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:25,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243423454] [2024-01-31 17:24:25,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243423454] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:25,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967697310] [2024-01-31 17:24:25,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:24:25,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:25,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:25,428 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:25,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-01-31 17:24:25,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:24:25,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:25,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:24:25,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:25,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:25,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:25,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967697310] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:25,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:25,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-31 17:24:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291714999] [2024-01-31 17:24:25,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:25,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:24:25,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:24:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:24:25,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:25,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 547 transitions, 11297 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:25,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:25,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:25,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:27,871 INFO L124 PetriNetUnfolderBase]: 1669/3173 cut-off events. [2024-01-31 17:24:27,871 INFO L125 PetriNetUnfolderBase]: For 115676/115676 co-relation queries the response was YES. [2024-01-31 17:24:27,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32864 conditions, 3173 events. 1669/3173 cut-off events. For 115676/115676 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21290 event pairs, 312 based on Foata normal form. 20/3193 useless extension candidates. Maximal degree in co-relation 32648. Up to 1450 conditions per place. [2024-01-31 17:24:27,906 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 412 selfloop transitions, 217 changer transitions 1/631 dead transitions. [2024-01-31 17:24:27,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 631 transitions, 13102 flow [2024-01-31 17:24:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-01-31 17:24:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-01-31 17:24:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 197 transitions. [2024-01-31 17:24:27,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-01-31 17:24:27,907 INFO L175 Difference]: Start difference. First operand has 396 places, 547 transitions, 11297 flow. Second operand 22 states and 197 transitions. [2024-01-31 17:24:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 631 transitions, 13102 flow [2024-01-31 17:24:28,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 631 transitions, 12931 flow, removed 42 selfloop flow, removed 20 redundant places. [2024-01-31 17:24:28,427 INFO L231 Difference]: Finished difference. Result has 395 places, 555 transitions, 11701 flow [2024-01-31 17:24:28,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11142, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=11701, PETRI_PLACES=395, PETRI_TRANSITIONS=555} [2024-01-31 17:24:28,428 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 373 predicate places. [2024-01-31 17:24:28,428 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 555 transitions, 11701 flow [2024-01-31 17:24:28,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:28,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:28,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:28,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:28,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-01-31 17:24:28,630 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:28,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:28,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1231400929, now seen corresponding path program 12 times [2024-01-31 17:24:28,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:28,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698405293] [2024-01-31 17:24:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:28,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698405293] [2024-01-31 17:24:29,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698405293] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:29,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850379686] [2024-01-31 17:24:29,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:24:29,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:29,633 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:29,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-01-31 17:24:29,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:24:29,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:29,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:24:29,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:30,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:30,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-01-31 17:24:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:30,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:30,398 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:24:30,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:24:30,516 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:30,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:24:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:30,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850379686] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:30,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:30,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-31 17:24:30,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717571618] [2024-01-31 17:24:30,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:30,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:24:30,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:30,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:24:30,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:24:30,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:30,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 555 transitions, 11701 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:30,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:30,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:30,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:32,440 INFO L124 PetriNetUnfolderBase]: 1750/3309 cut-off events. [2024-01-31 17:24:32,441 INFO L125 PetriNetUnfolderBase]: For 127229/127229 co-relation queries the response was YES. [2024-01-31 17:24:32,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35314 conditions, 3309 events. 1750/3309 cut-off events. For 127229/127229 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22181 event pairs, 252 based on Foata normal form. 7/3316 useless extension candidates. Maximal degree in co-relation 35109. Up to 3017 conditions per place. [2024-01-31 17:24:32,487 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 560 selfloop transitions, 86 changer transitions 12/659 dead transitions. [2024-01-31 17:24:32,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 659 transitions, 14407 flow [2024-01-31 17:24:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:24:32,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:24:32,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 244 transitions. [2024-01-31 17:24:32,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-01-31 17:24:32,488 INFO L175 Difference]: Start difference. First operand has 395 places, 555 transitions, 11701 flow. Second operand 28 states and 244 transitions. [2024-01-31 17:24:32,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 659 transitions, 14407 flow [2024-01-31 17:24:33,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 659 transitions, 14137 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-01-31 17:24:33,115 INFO L231 Difference]: Finished difference. Result has 424 places, 584 transitions, 12497 flow [2024-01-31 17:24:33,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=11441, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12497, PETRI_PLACES=424, PETRI_TRANSITIONS=584} [2024-01-31 17:24:33,117 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 402 predicate places. [2024-01-31 17:24:33,117 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 584 transitions, 12497 flow [2024-01-31 17:24:33,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:33,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:33,117 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:33,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-01-31 17:24:33,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-01-31 17:24:33,318 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:33,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:33,318 INFO L85 PathProgramCache]: Analyzing trace with hash -676621253, now seen corresponding path program 13 times [2024-01-31 17:24:33,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:33,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131016762] [2024-01-31 17:24:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:33,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131016762] [2024-01-31 17:24:34,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131016762] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:34,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836152267] [2024-01-31 17:24:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:24:34,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:34,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:34,072 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:34,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-01-31 17:24:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:34,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:24:34,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:34,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:34,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2024-01-31 17:24:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:34,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:34,800 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:34,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:24:34,856 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:24:34,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:24:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:34,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836152267] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:34,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:34,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 25 [2024-01-31 17:24:34,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838547469] [2024-01-31 17:24:34,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:34,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:24:34,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:34,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:24:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:24:34,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:34,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 584 transitions, 12497 flow. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:34,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:34,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:34,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:36,295 INFO L124 PetriNetUnfolderBase]: 1756/3334 cut-off events. [2024-01-31 17:24:36,295 INFO L125 PetriNetUnfolderBase]: For 135781/135781 co-relation queries the response was YES. [2024-01-31 17:24:36,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36011 conditions, 3334 events. 1756/3334 cut-off events. For 135781/135781 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22485 event pairs, 252 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 35802. Up to 3038 conditions per place. [2024-01-31 17:24:36,341 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 568 selfloop transitions, 74 changer transitions 7/650 dead transitions. [2024-01-31 17:24:36,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 650 transitions, 14472 flow [2024-01-31 17:24:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 17:24:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 17:24:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 210 transitions. [2024-01-31 17:24:36,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-01-31 17:24:36,342 INFO L175 Difference]: Start difference. First operand has 424 places, 584 transitions, 12497 flow. Second operand 25 states and 210 transitions. [2024-01-31 17:24:36,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 650 transitions, 14472 flow [2024-01-31 17:24:37,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 650 transitions, 13973 flow, removed 178 selfloop flow, removed 16 redundant places. [2024-01-31 17:24:37,187 INFO L231 Difference]: Finished difference. Result has 435 places, 590 transitions, 12340 flow [2024-01-31 17:24:37,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12003, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12340, PETRI_PLACES=435, PETRI_TRANSITIONS=590} [2024-01-31 17:24:37,188 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 413 predicate places. [2024-01-31 17:24:37,188 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 590 transitions, 12340 flow [2024-01-31 17:24:37,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:37,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:37,189 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:37,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-01-31 17:24:37,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:37,389 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:37,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:37,390 INFO L85 PathProgramCache]: Analyzing trace with hash -739421309, now seen corresponding path program 14 times [2024-01-31 17:24:37,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:37,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680029912] [2024-01-31 17:24:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:37,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:38,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:38,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680029912] [2024-01-31 17:24:38,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680029912] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:38,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224575439] [2024-01-31 17:24:38,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:24:38,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:38,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:38,103 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:38,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-01-31 17:24:38,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:24:38,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:38,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:24:38,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:38,454 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:38,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-01-31 17:24:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:38,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:38,715 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:24:38,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:24:38,847 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:38,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:24:38,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:38,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224575439] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:38,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:38,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-31 17:24:38,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187398465] [2024-01-31 17:24:38,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:38,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:24:38,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:38,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:24:38,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:24:38,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:38,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 590 transitions, 12340 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:38,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:38,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:38,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:40,874 INFO L124 PetriNetUnfolderBase]: 1803/3410 cut-off events. [2024-01-31 17:24:40,874 INFO L125 PetriNetUnfolderBase]: For 149272/149272 co-relation queries the response was YES. [2024-01-31 17:24:40,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36714 conditions, 3410 events. 1803/3410 cut-off events. For 149272/149272 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22934 event pairs, 254 based on Foata normal form. 3/3413 useless extension candidates. Maximal degree in co-relation 36502. Up to 3143 conditions per place. [2024-01-31 17:24:40,924 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 600 selfloop transitions, 74 changer transitions 8/683 dead transitions. [2024-01-31 17:24:40,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 683 transitions, 14830 flow [2024-01-31 17:24:40,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:24:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:24:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 234 transitions. [2024-01-31 17:24:40,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-01-31 17:24:40,926 INFO L175 Difference]: Start difference. First operand has 435 places, 590 transitions, 12340 flow. Second operand 27 states and 234 transitions. [2024-01-31 17:24:40,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 683 transitions, 14830 flow [2024-01-31 17:24:41,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 683 transitions, 14624 flow, removed 55 selfloop flow, removed 18 redundant places. [2024-01-31 17:24:41,788 INFO L231 Difference]: Finished difference. Result has 447 places, 609 transitions, 12998 flow [2024-01-31 17:24:41,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12134, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12998, PETRI_PLACES=447, PETRI_TRANSITIONS=609} [2024-01-31 17:24:41,789 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 425 predicate places. [2024-01-31 17:24:41,789 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 609 transitions, 12998 flow [2024-01-31 17:24:41,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:41,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:41,790 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:41,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-01-31 17:24:41,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:41,995 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:41,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:41,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1720123651, now seen corresponding path program 15 times [2024-01-31 17:24:41,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:41,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300678839] [2024-01-31 17:24:41,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:41,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:42,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:42,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300678839] [2024-01-31 17:24:42,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300678839] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:42,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132232012] [2024-01-31 17:24:42,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:24:42,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:42,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:42,581 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:42,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-01-31 17:24:42,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:24:42,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:42,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:24:42,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:42,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-01-31 17:24:42,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:42,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-01-31 17:24:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:42,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:43,289 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 63 treesize of output 55 [2024-01-31 17:24:43,374 INFO L349 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2024-01-31 17:24:43,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 308 treesize of output 291 [2024-01-31 17:24:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:43,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132232012] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:43,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:43,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-01-31 17:24:43,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747831719] [2024-01-31 17:24:43,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:43,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:24:43,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:43,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:24:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:24:43,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:43,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 609 transitions, 12998 flow. Second operand has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:43,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:43,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:43,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:45,288 INFO L124 PetriNetUnfolderBase]: 1804/3423 cut-off events. [2024-01-31 17:24:45,289 INFO L125 PetriNetUnfolderBase]: For 160824/160824 co-relation queries the response was YES. [2024-01-31 17:24:45,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37379 conditions, 3423 events. 1804/3423 cut-off events. For 160824/160824 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 23124 event pairs, 240 based on Foata normal form. 2/3425 useless extension candidates. Maximal degree in co-relation 37163. Up to 3142 conditions per place. [2024-01-31 17:24:45,346 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 598 selfloop transitions, 66 changer transitions 15/680 dead transitions. [2024-01-31 17:24:45,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 680 transitions, 14960 flow [2024-01-31 17:24:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-31 17:24:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-31 17:24:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 213 transitions. [2024-01-31 17:24:45,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057142857142857 [2024-01-31 17:24:45,347 INFO L175 Difference]: Start difference. First operand has 447 places, 609 transitions, 12998 flow. Second operand 25 states and 213 transitions. [2024-01-31 17:24:45,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 680 transitions, 14960 flow [2024-01-31 17:24:46,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 680 transitions, 14481 flow, removed 199 selfloop flow, removed 17 redundant places. [2024-01-31 17:24:46,268 INFO L231 Difference]: Finished difference. Result has 460 places, 611 transitions, 12719 flow [2024-01-31 17:24:46,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12519, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=12719, PETRI_PLACES=460, PETRI_TRANSITIONS=611} [2024-01-31 17:24:46,269 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 438 predicate places. [2024-01-31 17:24:46,269 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 611 transitions, 12719 flow [2024-01-31 17:24:46,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.678571428571429) internal successors, (131), 28 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:46,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:46,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:46,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-01-31 17:24:46,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-01-31 17:24:46,470 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:46,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:46,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1992778557, now seen corresponding path program 16 times [2024-01-31 17:24:46,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:46,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272652989] [2024-01-31 17:24:46,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:46,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:47,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:47,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272652989] [2024-01-31 17:24:47,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272652989] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:47,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066021669] [2024-01-31 17:24:47,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:24:47,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:47,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:47,203 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:47,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-01-31 17:24:47,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:24:47,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:47,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:24:47,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:47,535 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:47,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2024-01-31 17:24:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:47,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:47,852 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:24:47,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:24:47,984 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:24:47,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:24:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:48,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066021669] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:48,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:48,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-01-31 17:24:48,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511039546] [2024-01-31 17:24:48,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:48,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:24:48,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:48,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:24:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:24:48,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:48,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 611 transitions, 12719 flow. Second operand has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:48,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:48,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:48,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:50,237 INFO L124 PetriNetUnfolderBase]: 2054/3830 cut-off events. [2024-01-31 17:24:50,237 INFO L125 PetriNetUnfolderBase]: For 182225/182225 co-relation queries the response was YES. [2024-01-31 17:24:50,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41222 conditions, 3830 events. 2054/3830 cut-off events. For 182225/182225 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 26039 event pairs, 262 based on Foata normal form. 1/3831 useless extension candidates. Maximal degree in co-relation 40999. Up to 3240 conditions per place. [2024-01-31 17:24:50,286 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 632 selfloop transitions, 140 changer transitions 5/778 dead transitions. [2024-01-31 17:24:50,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 778 transitions, 16726 flow [2024-01-31 17:24:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-01-31 17:24:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-01-31 17:24:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 262 transitions. [2024-01-31 17:24:50,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37806637806637805 [2024-01-31 17:24:50,287 INFO L175 Difference]: Start difference. First operand has 460 places, 611 transitions, 12719 flow. Second operand 33 states and 262 transitions. [2024-01-31 17:24:50,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 778 transitions, 16726 flow [2024-01-31 17:24:51,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 778 transitions, 16560 flow, removed 19 selfloop flow, removed 22 redundant places. [2024-01-31 17:24:51,111 INFO L231 Difference]: Finished difference. Result has 475 places, 678 transitions, 14750 flow [2024-01-31 17:24:51,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12553, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=14750, PETRI_PLACES=475, PETRI_TRANSITIONS=678} [2024-01-31 17:24:51,112 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 453 predicate places. [2024-01-31 17:24:51,112 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 678 transitions, 14750 flow [2024-01-31 17:24:51,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.777777777777778) internal successors, (129), 27 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:51,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:51,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:51,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-01-31 17:24:51,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-01-31 17:24:51,313 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:51,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:51,313 INFO L85 PathProgramCache]: Analyzing trace with hash 197119427, now seen corresponding path program 17 times [2024-01-31 17:24:51,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:51,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122520024] [2024-01-31 17:24:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:51,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:24:51,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:51,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122520024] [2024-01-31 17:24:51,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122520024] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:51,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189898472] [2024-01-31 17:24:51,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:24:51,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:51,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:51,902 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:51,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-01-31 17:24:52,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:24:52,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:52,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:24:52,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:52,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:52,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-01-31 17:24:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:24:52,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:52,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:24:52,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 137 treesize of output 162 [2024-01-31 17:24:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:52,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189898472] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:52,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:52,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 26 [2024-01-31 17:24:52,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359399277] [2024-01-31 17:24:52,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:52,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:24:52,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:24:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:24:52,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:52,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 678 transitions, 14750 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:52,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:52,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:52,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:24:54,758 INFO L124 PetriNetUnfolderBase]: 2058/3857 cut-off events. [2024-01-31 17:24:54,759 INFO L125 PetriNetUnfolderBase]: For 194442/194442 co-relation queries the response was YES. [2024-01-31 17:24:54,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42414 conditions, 3857 events. 2058/3857 cut-off events. For 194442/194442 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26303 event pairs, 276 based on Foata normal form. 3/3860 useless extension candidates. Maximal degree in co-relation 42186. Up to 3518 conditions per place. [2024-01-31 17:24:54,826 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 654 selfloop transitions, 90 changer transitions 10/755 dead transitions. [2024-01-31 17:24:54,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 755 transitions, 17079 flow [2024-01-31 17:24:54,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:24:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:24:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 234 transitions. [2024-01-31 17:24:54,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-01-31 17:24:54,828 INFO L175 Difference]: Start difference. First operand has 475 places, 678 transitions, 14750 flow. Second operand 27 states and 234 transitions. [2024-01-31 17:24:54,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 755 transitions, 17079 flow [2024-01-31 17:24:56,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 755 transitions, 16264 flow, removed 351 selfloop flow, removed 19 redundant places. [2024-01-31 17:24:56,095 INFO L231 Difference]: Finished difference. Result has 487 places, 686 transitions, 14440 flow [2024-01-31 17:24:56,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=14037, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14440, PETRI_PLACES=487, PETRI_TRANSITIONS=686} [2024-01-31 17:24:56,096 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 465 predicate places. [2024-01-31 17:24:56,096 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 686 transitions, 14440 flow [2024-01-31 17:24:56,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:56,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:24:56,096 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:24:56,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-01-31 17:24:56,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-01-31 17:24:56,297 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:24:56,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:24:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1361408925, now seen corresponding path program 12 times [2024-01-31 17:24:56,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:24:56,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157748866] [2024-01-31 17:24:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:24:56,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:24:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:24:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:56,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:24:56,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157748866] [2024-01-31 17:24:56,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157748866] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:24:56,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594760376] [2024-01-31 17:24:56,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:24:56,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:24:56,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:24:56,484 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:24:56,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-01-31 17:24:56,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:24:56,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:24:56,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:24:56,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:24:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:56,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:24:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:24:56,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594760376] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:24:56,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:24:56,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-31 17:24:56,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773728925] [2024-01-31 17:24:56,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:24:56,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:24:56,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:24:56,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:24:56,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:24:56,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:24:56,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 686 transitions, 14440 flow. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:24:56,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:24:56,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:24:56,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:03,266 INFO L124 PetriNetUnfolderBase]: 2084/3911 cut-off events. [2024-01-31 17:25:03,266 INFO L125 PetriNetUnfolderBase]: For 189100/189100 co-relation queries the response was YES. [2024-01-31 17:25:03,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41939 conditions, 3911 events. 2084/3911 cut-off events. For 189100/189100 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 26943 event pairs, 373 based on Foata normal form. 24/3935 useless extension candidates. Maximal degree in co-relation 41657. Up to 1661 conditions per place. [2024-01-31 17:25:03,335 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 480 selfloop transitions, 315 changer transitions 5/801 dead transitions. [2024-01-31 17:25:03,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 801 transitions, 16940 flow [2024-01-31 17:25:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 17:25:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 17:25:03,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 285 transitions. [2024-01-31 17:25:03,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39915966386554624 [2024-01-31 17:25:03,337 INFO L175 Difference]: Start difference. First operand has 487 places, 686 transitions, 14440 flow. Second operand 34 states and 285 transitions. [2024-01-31 17:25:03,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 801 transitions, 16940 flow [2024-01-31 17:25:04,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 801 transitions, 16726 flow, removed 59 selfloop flow, removed 18 redundant places. [2024-01-31 17:25:04,681 INFO L231 Difference]: Finished difference. Result has 502 places, 696 transitions, 15212 flow [2024-01-31 17:25:04,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=14209, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15212, PETRI_PLACES=502, PETRI_TRANSITIONS=696} [2024-01-31 17:25:04,682 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 480 predicate places. [2024-01-31 17:25:04,682 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 696 transitions, 15212 flow [2024-01-31 17:25:04,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:04,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:04,682 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:04,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-01-31 17:25:04,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-01-31 17:25:04,883 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:04,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:04,883 INFO L85 PathProgramCache]: Analyzing trace with hash 349046465, now seen corresponding path program 13 times [2024-01-31 17:25:04,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:04,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649474747] [2024-01-31 17:25:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:04,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:05,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:05,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649474747] [2024-01-31 17:25:05,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649474747] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:05,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949526517] [2024-01-31 17:25:05,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:25:05,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:05,066 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:05,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-01-31 17:25:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:05,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:25:05,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:05,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:05,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949526517] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:05,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:05,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 17:25:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128851267] [2024-01-31 17:25:05,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:25:05,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:25:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:25:05,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:05,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 696 transitions, 15212 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:08,352 INFO L124 PetriNetUnfolderBase]: 2204/4119 cut-off events. [2024-01-31 17:25:08,352 INFO L125 PetriNetUnfolderBase]: For 197561/197561 co-relation queries the response was YES. [2024-01-31 17:25:08,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44776 conditions, 4119 events. 2204/4119 cut-off events. For 197561/197561 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 28597 event pairs, 573 based on Foata normal form. 40/4159 useless extension candidates. Maximal degree in co-relation 44469. Up to 2546 conditions per place. [2024-01-31 17:25:08,420 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 557 selfloop transitions, 268 changer transitions 0/826 dead transitions. [2024-01-31 17:25:08,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 826 transitions, 18220 flow [2024-01-31 17:25:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 17:25:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 17:25:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 269 transitions. [2024-01-31 17:25:08,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41321044546851 [2024-01-31 17:25:08,421 INFO L175 Difference]: Start difference. First operand has 502 places, 696 transitions, 15212 flow. Second operand 31 states and 269 transitions. [2024-01-31 17:25:08,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 826 transitions, 18220 flow [2024-01-31 17:25:09,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 826 transitions, 17456 flow, removed 116 selfloop flow, removed 24 redundant places. [2024-01-31 17:25:09,789 INFO L231 Difference]: Finished difference. Result has 511 places, 736 transitions, 16093 flow [2024-01-31 17:25:09,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=14489, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=16093, PETRI_PLACES=511, PETRI_TRANSITIONS=736} [2024-01-31 17:25:09,791 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 489 predicate places. [2024-01-31 17:25:09,791 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 736 transitions, 16093 flow [2024-01-31 17:25:09,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:09,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:09,791 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:09,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-01-31 17:25:09,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:09,992 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:09,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:09,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1864674272, now seen corresponding path program 18 times [2024-01-31 17:25:09,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:09,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964493790] [2024-01-31 17:25:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:09,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:10,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:10,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964493790] [2024-01-31 17:25:10,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964493790] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:10,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285952482] [2024-01-31 17:25:10,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:25:10,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:10,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:10,232 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:10,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-01-31 17:25:10,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:25:10,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:10,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-31 17:25:10,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:10,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-31 17:25:10,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285952482] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:10,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:10,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 15 [2024-01-31 17:25:10,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850213788] [2024-01-31 17:25:10,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:10,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:25:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:10,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:25:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:25:10,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:10,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 736 transitions, 16093 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:10,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:10,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:10,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:12,922 INFO L124 PetriNetUnfolderBase]: 2319/4326 cut-off events. [2024-01-31 17:25:12,922 INFO L125 PetriNetUnfolderBase]: For 234653/234653 co-relation queries the response was YES. [2024-01-31 17:25:12,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46945 conditions, 4326 events. 2319/4326 cut-off events. For 234653/234653 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30288 event pairs, 56 based on Foata normal form. 56/4382 useless extension candidates. Maximal degree in co-relation 46656. Up to 1308 conditions per place. [2024-01-31 17:25:12,996 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 427 selfloop transitions, 481 changer transitions 9/918 dead transitions. [2024-01-31 17:25:12,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 918 transitions, 21730 flow [2024-01-31 17:25:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 17:25:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 17:25:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 273 transitions. [2024-01-31 17:25:12,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2024-01-31 17:25:12,998 INFO L175 Difference]: Start difference. First operand has 511 places, 736 transitions, 16093 flow. Second operand 35 states and 273 transitions. [2024-01-31 17:25:12,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 918 transitions, 21730 flow [2024-01-31 17:25:14,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 918 transitions, 21131 flow, removed 163 selfloop flow, removed 17 redundant places. [2024-01-31 17:25:14,226 INFO L231 Difference]: Finished difference. Result has 538 places, 802 transitions, 18825 flow [2024-01-31 17:25:14,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=15473, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=18825, PETRI_PLACES=538, PETRI_TRANSITIONS=802} [2024-01-31 17:25:14,227 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 516 predicate places. [2024-01-31 17:25:14,227 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 802 transitions, 18825 flow [2024-01-31 17:25:14,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:14,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:14,227 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:14,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-01-31 17:25:14,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-01-31 17:25:14,428 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:14,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -620462139, now seen corresponding path program 14 times [2024-01-31 17:25:14,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:14,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427535277] [2024-01-31 17:25:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:14,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:14,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427535277] [2024-01-31 17:25:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427535277] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593465310] [2024-01-31 17:25:14,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:25:14,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:14,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:14,610 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:14,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-01-31 17:25:14,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:25:14,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:14,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:25:14,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:14,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:15,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593465310] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:15,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:15,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 17:25:15,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883777769] [2024-01-31 17:25:15,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:15,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:25:15,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:25:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:25:15,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:15,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 802 transitions, 18825 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:15,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:15,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:15,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:17,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:25:20,188 INFO L124 PetriNetUnfolderBase]: 2494/4689 cut-off events. [2024-01-31 17:25:20,188 INFO L125 PetriNetUnfolderBase]: For 248190/248190 co-relation queries the response was YES. [2024-01-31 17:25:20,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52567 conditions, 4689 events. 2494/4689 cut-off events. For 248190/248190 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 33828 event pairs, 146 based on Foata normal form. 4/4693 useless extension candidates. Maximal degree in co-relation 52311. Up to 973 conditions per place. [2024-01-31 17:25:20,271 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 358 selfloop transitions, 620 changer transitions 0/979 dead transitions. [2024-01-31 17:25:20,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 979 transitions, 24188 flow [2024-01-31 17:25:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-31 17:25:20,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-31 17:25:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 270 transitions. [2024-01-31 17:25:20,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-01-31 17:25:20,273 INFO L175 Difference]: Start difference. First operand has 538 places, 802 transitions, 18825 flow. Second operand 27 states and 270 transitions. [2024-01-31 17:25:20,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 979 transitions, 24188 flow [2024-01-31 17:25:22,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 979 transitions, 22082 flow, removed 694 selfloop flow, removed 22 redundant places. [2024-01-31 17:25:22,241 INFO L231 Difference]: Finished difference. Result has 547 places, 867 transitions, 20881 flow [2024-01-31 17:25:22,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=17304, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=560, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20881, PETRI_PLACES=547, PETRI_TRANSITIONS=867} [2024-01-31 17:25:22,243 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 525 predicate places. [2024-01-31 17:25:22,243 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 867 transitions, 20881 flow [2024-01-31 17:25:22,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:22,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:22,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:22,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-01-31 17:25:22,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-01-31 17:25:22,444 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:22,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:22,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1408892581, now seen corresponding path program 19 times [2024-01-31 17:25:22,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:22,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38985060] [2024-01-31 17:25:22,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:22,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:25:23,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:23,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38985060] [2024-01-31 17:25:23,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38985060] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:23,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611789351] [2024-01-31 17:25:23,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:25:23,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:23,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:23,419 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:23,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-01-31 17:25:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:23,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:25:23,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:23,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:23,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-01-31 17:25:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:25:23,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:24,116 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:25:24,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:25:24,171 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:25:24,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:25:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:24,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611789351] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:24,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:24,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 26 [2024-01-31 17:25:24,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074441563] [2024-01-31 17:25:24,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:24,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:25:24,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:24,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:25:24,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:25:24,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:24,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 867 transitions, 20881 flow. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:24,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:24,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:24,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:27,963 INFO L124 PetriNetUnfolderBase]: 2615/4899 cut-off events. [2024-01-31 17:25:27,964 INFO L125 PetriNetUnfolderBase]: For 184101/184101 co-relation queries the response was YES. [2024-01-31 17:25:28,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53135 conditions, 4899 events. 2615/4899 cut-off events. For 184101/184101 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 35388 event pairs, 296 based on Foata normal form. 9/4908 useless extension candidates. Maximal degree in co-relation 52847. Up to 4452 conditions per place. [2024-01-31 17:25:28,045 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 850 selfloop transitions, 146 changer transitions 16/1013 dead transitions. [2024-01-31 17:25:28,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 1013 transitions, 25212 flow [2024-01-31 17:25:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-31 17:25:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-31 17:25:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 320 transitions. [2024-01-31 17:25:28,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-01-31 17:25:28,046 INFO L175 Difference]: Start difference. First operand has 547 places, 867 transitions, 20881 flow. Second operand 36 states and 320 transitions. [2024-01-31 17:25:28,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 1013 transitions, 25212 flow [2024-01-31 17:25:29,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1013 transitions, 24402 flow, removed 250 selfloop flow, removed 11 redundant places. [2024-01-31 17:25:29,688 INFO L231 Difference]: Finished difference. Result has 583 places, 918 transitions, 22213 flow [2024-01-31 17:25:29,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20110, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=22213, PETRI_PLACES=583, PETRI_TRANSITIONS=918} [2024-01-31 17:25:29,689 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 561 predicate places. [2024-01-31 17:25:29,689 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 918 transitions, 22213 flow [2024-01-31 17:25:29,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:29,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:29,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:29,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-01-31 17:25:29,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-01-31 17:25:29,891 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:29,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:29,891 INFO L85 PathProgramCache]: Analyzing trace with hash -426529755, now seen corresponding path program 20 times [2024-01-31 17:25:29,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:29,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523286762] [2024-01-31 17:25:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:29,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:25:30,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:30,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523286762] [2024-01-31 17:25:30,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523286762] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:30,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667083313] [2024-01-31 17:25:30,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:25:30,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:30,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:30,696 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:30,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-01-31 17:25:30,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:25:30,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:30,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:25:30,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:31,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:31,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 71 [2024-01-31 17:25:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:25:31,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:31,411 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:25:31,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:25:31,513 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:25:31,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:25:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:31,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667083313] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:31,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:31,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2024-01-31 17:25:31,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100999649] [2024-01-31 17:25:31,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:31,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:25:31,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:25:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:25:31,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:31,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 918 transitions, 22213 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:31,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:31,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:31,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:34,564 INFO L124 PetriNetUnfolderBase]: 2607/4893 cut-off events. [2024-01-31 17:25:34,564 INFO L125 PetriNetUnfolderBase]: For 168693/168693 co-relation queries the response was YES. [2024-01-31 17:25:34,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51450 conditions, 4893 events. 2607/4893 cut-off events. For 168693/168693 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 35341 event pairs, 276 based on Foata normal form. 3/4896 useless extension candidates. Maximal degree in co-relation 51140. Up to 4474 conditions per place. [2024-01-31 17:25:34,662 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 857 selfloop transitions, 130 changer transitions 15/1003 dead transitions. [2024-01-31 17:25:34,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1003 transitions, 24783 flow [2024-01-31 17:25:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 17:25:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 17:25:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 277 transitions. [2024-01-31 17:25:34,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254992319508449 [2024-01-31 17:25:34,664 INFO L175 Difference]: Start difference. First operand has 583 places, 918 transitions, 22213 flow. Second operand 31 states and 277 transitions. [2024-01-31 17:25:34,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1003 transitions, 24783 flow [2024-01-31 17:25:36,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 1003 transitions, 23980 flow, removed 339 selfloop flow, removed 13 redundant places. [2024-01-31 17:25:36,390 INFO L231 Difference]: Finished difference. Result has 604 places, 921 transitions, 21811 flow [2024-01-31 17:25:36,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21410, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21811, PETRI_PLACES=604, PETRI_TRANSITIONS=921} [2024-01-31 17:25:36,392 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 582 predicate places. [2024-01-31 17:25:36,392 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 921 transitions, 21811 flow [2024-01-31 17:25:36,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:36,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:36,392 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:36,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-01-31 17:25:36,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:36,593 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:36,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash 362626773, now seen corresponding path program 15 times [2024-01-31 17:25:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:36,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102427600] [2024-01-31 17:25:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:36,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:36,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:36,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102427600] [2024-01-31 17:25:36,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102427600] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:36,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784442066] [2024-01-31 17:25:36,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:25:36,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:36,750 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:36,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-01-31 17:25:36,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:25:36,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:36,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:25:36,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:36,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:36,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:37,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784442066] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:37,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:37,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-31 17:25:37,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316753837] [2024-01-31 17:25:37,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:37,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:25:37,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:25:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:25:37,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:37,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 921 transitions, 21811 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:37,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:37,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:37,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:41,446 INFO L124 PetriNetUnfolderBase]: 2676/5033 cut-off events. [2024-01-31 17:25:41,446 INFO L125 PetriNetUnfolderBase]: For 174551/174551 co-relation queries the response was YES. [2024-01-31 17:25:41,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52183 conditions, 5033 events. 2676/5033 cut-off events. For 174551/174551 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36679 event pairs, 175 based on Foata normal form. 24/5057 useless extension candidates. Maximal degree in co-relation 51839. Up to 1847 conditions per place. [2024-01-31 17:25:41,547 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 487 selfloop transitions, 579 changer transitions 0/1067 dead transitions. [2024-01-31 17:25:41,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 1067 transitions, 25635 flow [2024-01-31 17:25:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-31 17:25:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-31 17:25:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 302 transitions. [2024-01-31 17:25:41,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108843537414966 [2024-01-31 17:25:41,549 INFO L175 Difference]: Start difference. First operand has 604 places, 921 transitions, 21811 flow. Second operand 35 states and 302 transitions. [2024-01-31 17:25:41,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 1067 transitions, 25635 flow [2024-01-31 17:25:43,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1067 transitions, 25310 flow, removed 76 selfloop flow, removed 27 redundant places. [2024-01-31 17:25:43,238 INFO L231 Difference]: Finished difference. Result has 619 places, 951 transitions, 24201 flow [2024-01-31 17:25:43,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21522, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=24201, PETRI_PLACES=619, PETRI_TRANSITIONS=951} [2024-01-31 17:25:43,240 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 597 predicate places. [2024-01-31 17:25:43,240 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 951 transitions, 24201 flow [2024-01-31 17:25:43,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:43,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:43,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:43,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-01-31 17:25:43,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:43,453 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:43,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1143309755, now seen corresponding path program 21 times [2024-01-31 17:25:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:43,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905804801] [2024-01-31 17:25:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:43,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:25:44,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:44,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905804801] [2024-01-31 17:25:44,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905804801] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:44,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361847139] [2024-01-31 17:25:44,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:25:44,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:44,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:44,164 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:44,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-01-31 17:25:44,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:25:44,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:44,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:25:44,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:44,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:44,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-01-31 17:25:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:25:44,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:44,871 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:25:44,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:25:44,973 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:25:44,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:25:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:45,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361847139] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:45,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:45,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 26 [2024-01-31 17:25:45,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994609413] [2024-01-31 17:25:45,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:45,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:25:45,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:45,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:25:45,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:25:45,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:45,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 951 transitions, 24201 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:45,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:45,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:45,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:48,067 INFO L124 PetriNetUnfolderBase]: 2959/5502 cut-off events. [2024-01-31 17:25:48,067 INFO L125 PetriNetUnfolderBase]: For 204108/204108 co-relation queries the response was YES. [2024-01-31 17:25:48,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60062 conditions, 5502 events. 2959/5502 cut-off events. For 204108/204108 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40315 event pairs, 268 based on Foata normal form. 1/5503 useless extension candidates. Maximal degree in co-relation 59693. Up to 4377 conditions per place. [2024-01-31 17:25:48,161 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 894 selfloop transitions, 266 changer transitions 5/1166 dead transitions. [2024-01-31 17:25:48,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 1166 transitions, 30620 flow [2024-01-31 17:25:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 17:25:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 17:25:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 235 transitions. [2024-01-31 17:25:48,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-01-31 17:25:48,162 INFO L175 Difference]: Start difference. First operand has 619 places, 951 transitions, 24201 flow. Second operand 30 states and 235 transitions. [2024-01-31 17:25:48,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 1166 transitions, 30620 flow [2024-01-31 17:25:49,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 1166 transitions, 30064 flow, removed 156 selfloop flow, removed 17 redundant places. [2024-01-31 17:25:49,955 INFO L231 Difference]: Finished difference. Result has 639 places, 1036 transitions, 27255 flow [2024-01-31 17:25:49,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=23823, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=27255, PETRI_PLACES=639, PETRI_TRANSITIONS=1036} [2024-01-31 17:25:49,957 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 617 predicate places. [2024-01-31 17:25:49,957 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 1036 transitions, 27255 flow [2024-01-31 17:25:49,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:49,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:49,957 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:49,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-01-31 17:25:50,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:50,172 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:50,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:50,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1091708707, now seen corresponding path program 22 times [2024-01-31 17:25:50,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:50,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633604411] [2024-01-31 17:25:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:50,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:25:50,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:50,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633604411] [2024-01-31 17:25:50,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633604411] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:50,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267410860] [2024-01-31 17:25:50,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:25:50,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:50,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:50,879 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:50,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-01-31 17:25:51,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:25:51,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:51,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:25:51,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:51,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:51,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-01-31 17:25:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:25:51,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:51,505 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:25:51,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:25:51,560 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:25:51,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:25:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:51,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267410860] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:51,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:51,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 25 [2024-01-31 17:25:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638523861] [2024-01-31 17:25:51,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:51,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:25:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:25:51,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:25:51,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:51,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 1036 transitions, 27255 flow. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:51,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:51,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:51,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:25:54,455 INFO L124 PetriNetUnfolderBase]: 3025/5630 cut-off events. [2024-01-31 17:25:54,455 INFO L125 PetriNetUnfolderBase]: For 224630/224630 co-relation queries the response was YES. [2024-01-31 17:25:54,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62820 conditions, 5630 events. 3025/5630 cut-off events. For 224630/224630 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 41401 event pairs, 354 based on Foata normal form. 2/5632 useless extension candidates. Maximal degree in co-relation 62443. Up to 5283 conditions per place. [2024-01-31 17:25:54,550 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 1046 selfloop transitions, 89 changer transitions 10/1146 dead transitions. [2024-01-31 17:25:54,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1146 transitions, 31091 flow [2024-01-31 17:25:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:25:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:25:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 253 transitions. [2024-01-31 17:25:54,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302721088435374 [2024-01-31 17:25:54,552 INFO L175 Difference]: Start difference. First operand has 639 places, 1036 transitions, 27255 flow. Second operand 28 states and 253 transitions. [2024-01-31 17:25:54,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1146 transitions, 31091 flow [2024-01-31 17:25:57,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 1146 transitions, 30671 flow, removed 135 selfloop flow, removed 16 redundant places. [2024-01-31 17:25:57,104 INFO L231 Difference]: Finished difference. Result has 658 places, 1064 transitions, 28172 flow [2024-01-31 17:25:57,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=26839, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1036, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=959, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=28172, PETRI_PLACES=658, PETRI_TRANSITIONS=1064} [2024-01-31 17:25:57,106 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 636 predicate places. [2024-01-31 17:25:57,106 INFO L495 AbstractCegarLoop]: Abstraction has has 658 places, 1064 transitions, 28172 flow [2024-01-31 17:25:57,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:57,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:25:57,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:25:57,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-01-31 17:25:57,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-01-31 17:25:57,307 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:25:57,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:25:57,308 INFO L85 PathProgramCache]: Analyzing trace with hash 743713629, now seen corresponding path program 23 times [2024-01-31 17:25:57,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:25:57,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213560095] [2024-01-31 17:25:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:25:57,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:25:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:25:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:25:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:25:58,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213560095] [2024-01-31 17:25:58,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213560095] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:25:58,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199239477] [2024-01-31 17:25:58,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:25:58,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:25:58,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:25:58,134 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:25:58,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-01-31 17:25:58,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:25:58,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:25:58,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:25:58,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:25:58,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:58,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2024-01-31 17:25:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:25:58,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:25:58,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:25:58,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 158 [2024-01-31 17:25:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:25:59,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199239477] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:25:59,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:25:59,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 27 [2024-01-31 17:25:59,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316040771] [2024-01-31 17:25:59,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:25:59,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:25:59,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:25:59,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:25:59,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:25:59,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:25:59,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 1064 transitions, 28172 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:25:59,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:25:59,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:25:59,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:02,872 INFO L124 PetriNetUnfolderBase]: 3024/5627 cut-off events. [2024-01-31 17:26:02,872 INFO L125 PetriNetUnfolderBase]: For 232224/232224 co-relation queries the response was YES. [2024-01-31 17:26:02,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63049 conditions, 5627 events. 3024/5627 cut-off events. For 232224/232224 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 41310 event pairs, 342 based on Foata normal form. 4/5631 useless extension candidates. Maximal degree in co-relation 62663. Up to 5290 conditions per place. [2024-01-31 17:26:02,981 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 1040 selfloop transitions, 94 changer transitions 11/1146 dead transitions. [2024-01-31 17:26:02,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 1146 transitions, 30943 flow [2024-01-31 17:26:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-01-31 17:26:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-01-31 17:26:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 271 transitions. [2024-01-31 17:26:02,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4162826420890937 [2024-01-31 17:26:02,985 INFO L175 Difference]: Start difference. First operand has 658 places, 1064 transitions, 28172 flow. Second operand 31 states and 271 transitions. [2024-01-31 17:26:02,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 1146 transitions, 30943 flow [2024-01-31 17:26:05,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 1146 transitions, 30024 flow, removed 292 selfloop flow, removed 21 redundant places. [2024-01-31 17:26:05,391 INFO L231 Difference]: Finished difference. Result has 670 places, 1063 transitions, 27485 flow [2024-01-31 17:26:05,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27269, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=27485, PETRI_PLACES=670, PETRI_TRANSITIONS=1063} [2024-01-31 17:26:05,392 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 648 predicate places. [2024-01-31 17:26:05,392 INFO L495 AbstractCegarLoop]: Abstraction has has 670 places, 1063 transitions, 27485 flow [2024-01-31 17:26:05,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 17:26:05,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:05,392 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:05,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:05,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-01-31 17:26:05,593 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:26:05,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:05,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1317146173, now seen corresponding path program 24 times [2024-01-31 17:26:05,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:05,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191960988] [2024-01-31 17:26:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:05,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:06,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:06,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191960988] [2024-01-31 17:26:06,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191960988] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:26:06,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982807128] [2024-01-31 17:26:06,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:26:06,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:06,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:06,260 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:06,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-01-31 17:26:06,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:26:06,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:06,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:26:06,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:06,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:26:06,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2024-01-31 17:26:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:26:06,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:26:06,970 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:26:06,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:26:07,100 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:26:07,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:26:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:26:07,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982807128] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:07,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:26:07,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-31 17:26:07,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300856474] [2024-01-31 17:26:07,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:07,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:26:07,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:26:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:26:07,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:26:07,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 670 places, 1063 transitions, 27485 flow. Second operand has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 17:26:07,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:07,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:26:07,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:10,733 INFO L124 PetriNetUnfolderBase]: 3065/5694 cut-off events. [2024-01-31 17:26:10,733 INFO L125 PetriNetUnfolderBase]: For 233623/233623 co-relation queries the response was YES. [2024-01-31 17:26:10,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63706 conditions, 5694 events. 3065/5694 cut-off events. For 233623/233623 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 41815 event pairs, 348 based on Foata normal form. 3/5697 useless extension candidates. Maximal degree in co-relation 63317. Up to 5397 conditions per place. [2024-01-31 17:26:10,860 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 1052 selfloop transitions, 87 changer transitions 9/1149 dead transitions. [2024-01-31 17:26:10,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 1149 transitions, 31036 flow [2024-01-31 17:26:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 17:26:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 17:26:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 246 transitions. [2024-01-31 17:26:10,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-01-31 17:26:10,862 INFO L175 Difference]: Start difference. First operand has 670 places, 1063 transitions, 27485 flow. Second operand 30 states and 246 transitions. [2024-01-31 17:26:10,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 1149 transitions, 31036 flow [2024-01-31 17:26:13,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 671 places, 1149 transitions, 30767 flow, removed 46 selfloop flow, removed 28 redundant places. [2024-01-31 17:26:13,654 INFO L231 Difference]: Finished difference. Result has 678 places, 1082 transitions, 28292 flow [2024-01-31 17:26:13,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27216, PETRI_DIFFERENCE_MINUEND_PLACES=642, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=28292, PETRI_PLACES=678, PETRI_TRANSITIONS=1082} [2024-01-31 17:26:13,655 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 656 predicate places. [2024-01-31 17:26:13,655 INFO L495 AbstractCegarLoop]: Abstraction has has 678 places, 1082 transitions, 28292 flow [2024-01-31 17:26:13,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.857142857142857) internal successors, (136), 28 states have internal predecessors, (136), 0 states have call successors, (0), 0 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 17:26:13,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:13,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:13,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:13,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-01-31 17:26:13,856 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:26:13,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1142398787, now seen corresponding path program 25 times [2024-01-31 17:26:13,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:13,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199177708] [2024-01-31 17:26:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:13,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:14,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:14,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199177708] [2024-01-31 17:26:14,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199177708] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:26:14,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392032358] [2024-01-31 17:26:14,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:26:14,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:14,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:14,461 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-01-31 17:26:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:14,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:26:14,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:14,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:26:14,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 75 [2024-01-31 17:26:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:26:14,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:26:15,133 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:26:15,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:26:15,197 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:26:15,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:26:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:26:15,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392032358] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:15,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:26:15,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 25 [2024-01-31 17:26:15,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870759533] [2024-01-31 17:26:15,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:15,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:26:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:26:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:26:15,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:26:15,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 678 places, 1082 transitions, 28292 flow. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 17:26:15,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:15,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:26:15,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:18,670 INFO L124 PetriNetUnfolderBase]: 3072/5716 cut-off events. [2024-01-31 17:26:18,670 INFO L125 PetriNetUnfolderBase]: For 239710/239710 co-relation queries the response was YES. [2024-01-31 17:26:18,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64185 conditions, 5716 events. 3072/5716 cut-off events. For 239710/239710 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 42063 event pairs, 346 based on Foata normal form. 2/5718 useless extension candidates. Maximal degree in co-relation 63753. Up to 5418 conditions per place. [2024-01-31 17:26:18,791 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 1060 selfloop transitions, 83 changer transitions 14/1158 dead transitions. [2024-01-31 17:26:18,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 1158 transitions, 31272 flow [2024-01-31 17:26:18,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:26:18,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:26:18,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 238 transitions. [2024-01-31 17:26:18,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-01-31 17:26:18,793 INFO L175 Difference]: Start difference. First operand has 678 places, 1082 transitions, 28292 flow. Second operand 28 states and 238 transitions. [2024-01-31 17:26:18,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 1158 transitions, 31272 flow [2024-01-31 17:26:21,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 1158 transitions, 30575 flow, removed 264 selfloop flow, removed 24 redundant places. [2024-01-31 17:26:21,738 INFO L231 Difference]: Finished difference. Result has 686 places, 1089 transitions, 28032 flow [2024-01-31 17:26:21,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27655, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1004, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=28032, PETRI_PLACES=686, PETRI_TRANSITIONS=1089} [2024-01-31 17:26:21,739 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 664 predicate places. [2024-01-31 17:26:21,739 INFO L495 AbstractCegarLoop]: Abstraction has has 686 places, 1089 transitions, 28032 flow [2024-01-31 17:26:21,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 17:26:21,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:21,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:21,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-01-31 17:26:21,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-01-31 17:26:21,940 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:26:21,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash -509643619, now seen corresponding path program 26 times [2024-01-31 17:26:21,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:21,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554931948] [2024-01-31 17:26:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:22,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:22,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554931948] [2024-01-31 17:26:22,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554931948] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:26:22,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989534998] [2024-01-31 17:26:22,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:26:22,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:22,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:22,612 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:22,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-01-31 17:26:22,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:26:22,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:22,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:26:22,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:22,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:26:22,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-01-31 17:26:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:26:23,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:26:23,332 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:26:23,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:26:23,454 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:26:23,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:26:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:26:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989534998] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:23,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:26:23,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-31 17:26:23,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643850584] [2024-01-31 17:26:23,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:23,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:26:23,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:26:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:26:23,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:26:23,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 686 places, 1089 transitions, 28032 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 17:26:23,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:23,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:26:23,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:27,546 INFO L124 PetriNetUnfolderBase]: 3133/5805 cut-off events. [2024-01-31 17:26:27,546 INFO L125 PetriNetUnfolderBase]: For 238236/238236 co-relation queries the response was YES. [2024-01-31 17:26:27,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64847 conditions, 5805 events. 3133/5805 cut-off events. For 238236/238236 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 42633 event pairs, 314 based on Foata normal form. 1/5806 useless extension candidates. Maximal degree in co-relation 64450. Up to 5294 conditions per place. [2024-01-31 17:26:27,664 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1045 selfloop transitions, 143 changer transitions 5/1194 dead transitions. [2024-01-31 17:26:27,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 721 places, 1194 transitions, 31527 flow [2024-01-31 17:26:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-01-31 17:26:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-01-31 17:26:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 282 transitions. [2024-01-31 17:26:27,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533834586466165 [2024-01-31 17:26:27,666 INFO L175 Difference]: Start difference. First operand has 686 places, 1089 transitions, 28032 flow. Second operand 38 states and 282 transitions. [2024-01-31 17:26:27,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 721 places, 1194 transitions, 31527 flow [2024-01-31 17:26:30,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1194 transitions, 31272 flow, removed 44 selfloop flow, removed 23 redundant places. [2024-01-31 17:26:30,567 INFO L231 Difference]: Finished difference. Result has 705 places, 1113 transitions, 28865 flow [2024-01-31 17:26:30,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=27777, PETRI_DIFFERENCE_MINUEND_PLACES=661, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=28865, PETRI_PLACES=705, PETRI_TRANSITIONS=1113} [2024-01-31 17:26:30,569 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 683 predicate places. [2024-01-31 17:26:30,569 INFO L495 AbstractCegarLoop]: Abstraction has has 705 places, 1113 transitions, 28865 flow [2024-01-31 17:26:30,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 17:26:30,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:30,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:30,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:30,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-01-31 17:26:30,787 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:26:30,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1494052379, now seen corresponding path program 16 times [2024-01-31 17:26:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:30,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887181472] [2024-01-31 17:26:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:30,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:26:30,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:30,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887181472] [2024-01-31 17:26:30,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887181472] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:26:30,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454513764] [2024-01-31 17:26:30,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:26:30,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:30,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:30,961 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:30,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-01-31 17:26:31,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:26:31,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:31,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:26:31,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:26:31,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:26:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:26:31,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454513764] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:31,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:26:31,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-01-31 17:26:31,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130960490] [2024-01-31 17:26:31,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:31,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:26:31,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:26:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:26:31,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:26:31,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 705 places, 1113 transitions, 28865 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:31,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:31,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:26:31,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:34,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:26:37,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-01-31 17:26:42,729 INFO L124 PetriNetUnfolderBase]: 3285/6073 cut-off events. [2024-01-31 17:26:42,729 INFO L125 PetriNetUnfolderBase]: For 258295/258295 co-relation queries the response was YES. [2024-01-31 17:26:42,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68090 conditions, 6073 events. 3285/6073 cut-off events. For 258295/258295 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 44903 event pairs, 506 based on Foata normal form. 40/6113 useless extension candidates. Maximal degree in co-relation 67688. Up to 2658 conditions per place. [2024-01-31 17:26:42,867 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 706 selfloop transitions, 558 changer transitions 0/1265 dead transitions. [2024-01-31 17:26:42,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 1265 transitions, 34007 flow [2024-01-31 17:26:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-01-31 17:26:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-01-31 17:26:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 258 transitions. [2024-01-31 17:26:42,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-01-31 17:26:42,868 INFO L175 Difference]: Start difference. First operand has 705 places, 1113 transitions, 28865 flow. Second operand 30 states and 258 transitions. [2024-01-31 17:26:42,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 1265 transitions, 34007 flow [2024-01-31 17:26:46,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 705 places, 1265 transitions, 33659 flow, removed 56 selfloop flow, removed 28 redundant places. [2024-01-31 17:26:46,300 INFO L231 Difference]: Finished difference. Result has 710 places, 1165 transitions, 31623 flow [2024-01-31 17:26:46,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=28480, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=31623, PETRI_PLACES=710, PETRI_TRANSITIONS=1165} [2024-01-31 17:26:46,302 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 688 predicate places. [2024-01-31 17:26:46,302 INFO L495 AbstractCegarLoop]: Abstraction has has 710 places, 1165 transitions, 31623 flow [2024-01-31 17:26:46,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:46,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:46,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:46,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:46,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-01-31 17:26:46,520 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:26:46,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:46,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1300270435, now seen corresponding path program 27 times [2024-01-31 17:26:46,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:46,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687340546] [2024-01-31 17:26:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:46,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:47,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:47,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687340546] [2024-01-31 17:26:47,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687340546] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:26:47,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897560986] [2024-01-31 17:26:47,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:26:47,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:47,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:47,147 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:47,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-01-31 17:26:47,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:26:47,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:47,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-31 17:26:47,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:47,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:26:47,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 60 [2024-01-31 17:26:47,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:26:47,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:26:47,920 INFO L349 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2024-01-31 17:26:47,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2024-01-31 17:26:48,044 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:26:48,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:26:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:26:48,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897560986] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:48,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:26:48,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 27 [2024-01-31 17:26:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117196907] [2024-01-31 17:26:48,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:48,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-01-31 17:26:48,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-01-31 17:26:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-01-31 17:26:48,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:26:48,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 710 places, 1165 transitions, 31623 flow. Second operand has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 17:26:48,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:48,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:26:48,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:52,372 INFO L124 PetriNetUnfolderBase]: 3314/6125 cut-off events. [2024-01-31 17:26:52,372 INFO L125 PetriNetUnfolderBase]: For 268790/268790 co-relation queries the response was YES. [2024-01-31 17:26:52,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71112 conditions, 6125 events. 3314/6125 cut-off events. For 268790/268790 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 45472 event pairs, 360 based on Foata normal form. 1/6126 useless extension candidates. Maximal degree in co-relation 70708. Up to 5682 conditions per place. [2024-01-31 17:26:52,487 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1083 selfloop transitions, 158 changer transitions 5/1247 dead transitions. [2024-01-31 17:26:52,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 1247 transitions, 34940 flow [2024-01-31 17:26:52,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-31 17:26:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-31 17:26:52,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 266 transitions. [2024-01-31 17:26:52,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37254901960784315 [2024-01-31 17:26:52,488 INFO L175 Difference]: Start difference. First operand has 710 places, 1165 transitions, 31623 flow. Second operand 34 states and 266 transitions. [2024-01-31 17:26:52,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 1247 transitions, 34940 flow [2024-01-31 17:26:55,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 728 places, 1247 transitions, 34404 flow, removed 148 selfloop flow, removed 15 redundant places. [2024-01-31 17:26:55,184 INFO L231 Difference]: Finished difference. Result has 734 places, 1181 transitions, 32008 flow [2024-01-31 17:26:55,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=31087, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=32008, PETRI_PLACES=734, PETRI_TRANSITIONS=1181} [2024-01-31 17:26:55,185 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 712 predicate places. [2024-01-31 17:26:55,185 INFO L495 AbstractCegarLoop]: Abstraction has has 734 places, 1181 transitions, 32008 flow [2024-01-31 17:26:55,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.714285714285714) internal successors, (132), 28 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 17:26:55,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:55,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:55,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-01-31 17:26:55,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:55,386 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:26:55,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:55,386 INFO L85 PathProgramCache]: Analyzing trace with hash 806513685, now seen corresponding path program 28 times [2024-01-31 17:26:55,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:55,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475199620] [2024-01-31 17:26:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:55,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:55,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:55,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475199620] [2024-01-31 17:26:55,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475199620] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:26:55,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127101740] [2024-01-31 17:26:55,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:26:55,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:55,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:55,926 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:55,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-01-31 17:26:56,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:26:56,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:56,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 29 conjunts are in the unsatisfiable core [2024-01-31 17:26:56,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:56,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:26:56,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2024-01-31 17:26:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:26:56,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:26:56,497 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-01-31 17:26:56,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-01-31 17:26:56,548 INFO L349 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2024-01-31 17:26:56,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2024-01-31 17:26:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:26:56,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127101740] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:56,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:26:56,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 25 [2024-01-31 17:26:56,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601794253] [2024-01-31 17:26:56,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:56,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-01-31 17:26:56,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-01-31 17:26:56,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-01-31 17:26:56,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:26:56,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 734 places, 1181 transitions, 32008 flow. Second operand has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 17:26:56,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:56,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:26:56,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:59,999 INFO L124 PetriNetUnfolderBase]: 3364/6220 cut-off events. [2024-01-31 17:26:59,999 INFO L125 PetriNetUnfolderBase]: For 289574/289574 co-relation queries the response was YES. [2024-01-31 17:27:00,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72612 conditions, 6220 events. 3364/6220 cut-off events. For 289574/289574 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 46061 event pairs, 370 based on Foata normal form. 3/6223 useless extension candidates. Maximal degree in co-relation 72118. Up to 5827 conditions per place. [2024-01-31 17:27:00,106 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1157 selfloop transitions, 104 changer transitions 7/1269 dead transitions. [2024-01-31 17:27:00,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 1269 transitions, 36015 flow [2024-01-31 17:27:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-01-31 17:27:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-01-31 17:27:00,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 237 transitions. [2024-01-31 17:27:00,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030612244897959 [2024-01-31 17:27:00,107 INFO L175 Difference]: Start difference. First operand has 734 places, 1181 transitions, 32008 flow. Second operand 28 states and 237 transitions. [2024-01-31 17:27:00,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 1269 transitions, 36015 flow [2024-01-31 17:27:02,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 1269 transitions, 35644 flow, removed 99 selfloop flow, removed 24 redundant places. [2024-01-31 17:27:02,758 INFO L231 Difference]: Finished difference. Result has 743 places, 1201 transitions, 32885 flow [2024-01-31 17:27:02,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=31639, PETRI_DIFFERENCE_MINUEND_PLACES=709, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=32885, PETRI_PLACES=743, PETRI_TRANSITIONS=1201} [2024-01-31 17:27:02,759 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 721 predicate places. [2024-01-31 17:27:02,760 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 1201 transitions, 32885 flow [2024-01-31 17:27:02,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.8076923076923075) internal successors, (125), 26 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:02,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:02,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:02,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-01-31 17:27:02,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:02,960 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:02,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:02,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1678539557, now seen corresponding path program 29 times [2024-01-31 17:27:02,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:02,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946951364] [2024-01-31 17:27:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:03,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946951364] [2024-01-31 17:27:03,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946951364] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:03,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313017092] [2024-01-31 17:27:03,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:27:03,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:03,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:03,494 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:03,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-01-31 17:27:03,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:27:03,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:03,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:27:03,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:03,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:27:03,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 64 [2024-01-31 17:27:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 17:27:03,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:04,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:27:04,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 152 [2024-01-31 17:27:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313017092] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:04,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:04,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 26 [2024-01-31 17:27:04,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359358647] [2024-01-31 17:27:04,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:04,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-01-31 17:27:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:04,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-01-31 17:27:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2024-01-31 17:27:04,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:27:04,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 1201 transitions, 32885 flow. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:04,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:04,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:27:04,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:08,052 INFO L124 PetriNetUnfolderBase]: 3363/6211 cut-off events. [2024-01-31 17:27:08,052 INFO L125 PetriNetUnfolderBase]: For 293642/293642 co-relation queries the response was YES. [2024-01-31 17:27:08,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72884 conditions, 6211 events. 3363/6211 cut-off events. For 293642/293642 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 46138 event pairs, 392 based on Foata normal form. 1/6212 useless extension candidates. Maximal degree in co-relation 72448. Up to 5802 conditions per place. [2024-01-31 17:27:08,183 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1117 selfloop transitions, 128 changer transitions 5/1251 dead transitions. [2024-01-31 17:27:08,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 1251 transitions, 35644 flow [2024-01-31 17:27:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:27:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:27:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 204 transitions. [2024-01-31 17:27:08,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2024-01-31 17:27:08,184 INFO L175 Difference]: Start difference. First operand has 743 places, 1201 transitions, 32885 flow. Second operand 26 states and 204 transitions. [2024-01-31 17:27:08,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 1251 transitions, 35644 flow [2024-01-31 17:27:11,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 752 places, 1251 transitions, 35003 flow, removed 272 selfloop flow, removed 15 redundant places. [2024-01-31 17:27:11,438 INFO L231 Difference]: Finished difference. Result has 754 places, 1202 transitions, 32583 flow [2024-01-31 17:27:11,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32244, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=32583, PETRI_PLACES=754, PETRI_TRANSITIONS=1202} [2024-01-31 17:27:11,439 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 732 predicate places. [2024-01-31 17:27:11,439 INFO L495 AbstractCegarLoop]: Abstraction has has 754 places, 1202 transitions, 32583 flow [2024-01-31 17:27:11,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 27 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:11,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:11,440 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:11,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-01-31 17:27:11,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:11,648 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:11,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:11,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1214960197, now seen corresponding path program 17 times [2024-01-31 17:27:11,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:11,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596097161] [2024-01-31 17:27:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:11,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:11,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:11,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596097161] [2024-01-31 17:27:11,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596097161] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:11,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598846635] [2024-01-31 17:27:11,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:27:11,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:11,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:11,792 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:11,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-01-31 17:27:12,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-31 17:27:12,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:12,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:27:12,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:12,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:12,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598846635] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:12,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:12,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-31 17:27:12,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365086010] [2024-01-31 17:27:12,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:12,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:27:12,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:27:12,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:27:12,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:27:12,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 1202 transitions, 32583 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:12,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:12,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:27:12,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:17,550 INFO L124 PetriNetUnfolderBase]: 3345/6175 cut-off events. [2024-01-31 17:27:17,551 INFO L125 PetriNetUnfolderBase]: For 299261/299261 co-relation queries the response was YES. [2024-01-31 17:27:17,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72231 conditions, 6175 events. 3345/6175 cut-off events. For 299261/299261 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 46083 event pairs, 195 based on Foata normal form. 32/6207 useless extension candidates. Maximal degree in co-relation 71867. Up to 1205 conditions per place. [2024-01-31 17:27:17,681 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 438 selfloop transitions, 889 changer transitions 0/1328 dead transitions. [2024-01-31 17:27:17,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 1328 transitions, 36578 flow [2024-01-31 17:27:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-31 17:27:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-31 17:27:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 326 transitions. [2024-01-31 17:27:17,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-01-31 17:27:17,682 INFO L175 Difference]: Start difference. First operand has 754 places, 1202 transitions, 32583 flow. Second operand 36 states and 326 transitions. [2024-01-31 17:27:17,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 1328 transitions, 36578 flow [2024-01-31 17:27:20,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 764 places, 1328 transitions, 36184 flow, removed 45 selfloop flow, removed 24 redundant places. [2024-01-31 17:27:20,976 INFO L231 Difference]: Finished difference. Result has 766 places, 1208 transitions, 34277 flow [2024-01-31 17:27:20,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32101, PETRI_DIFFERENCE_MINUEND_PLACES=729, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=880, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=34277, PETRI_PLACES=766, PETRI_TRANSITIONS=1208} [2024-01-31 17:27:20,978 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 744 predicate places. [2024-01-31 17:27:20,978 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 1208 transitions, 34277 flow [2024-01-31 17:27:20,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:20,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:20,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:20,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-01-31 17:27:21,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-01-31 17:27:21,179 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:21,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:21,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1528334397, now seen corresponding path program 18 times [2024-01-31 17:27:21,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:21,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367278529] [2024-01-31 17:27:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:21,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:21,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:21,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:21,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367278529] [2024-01-31 17:27:21,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367278529] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:21,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597213911] [2024-01-31 17:27:21,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:27:21,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:21,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:21,339 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:21,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-01-31 17:27:21,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-31 17:27:21,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:21,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:27:21,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:21,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:21,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597213911] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:21,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:21,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-01-31 17:27:21,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712362604] [2024-01-31 17:27:21,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:21,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:27:21,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:21,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:27:21,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:27:21,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:27:21,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 1208 transitions, 34277 flow. Second operand has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:21,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:21,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:27:21,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:26,463 INFO L124 PetriNetUnfolderBase]: 4126/7481 cut-off events. [2024-01-31 17:27:26,463 INFO L125 PetriNetUnfolderBase]: For 380091/380091 co-relation queries the response was YES. [2024-01-31 17:27:26,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92005 conditions, 7481 events. 4126/7481 cut-off events. For 380091/380091 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 56072 event pairs, 105 based on Foata normal form. 6/7487 useless extension candidates. Maximal degree in co-relation 91637. Up to 1950 conditions per place. [2024-01-31 17:27:26,916 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 561 selfloop transitions, 911 changer transitions 0/1473 dead transitions. [2024-01-31 17:27:26,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 1473 transitions, 43773 flow [2024-01-31 17:27:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-31 17:27:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-31 17:27:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 262 transitions. [2024-01-31 17:27:26,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47985347985347987 [2024-01-31 17:27:26,918 INFO L175 Difference]: Start difference. First operand has 766 places, 1208 transitions, 34277 flow. Second operand 26 states and 262 transitions. [2024-01-31 17:27:26,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 1473 transitions, 43773 flow [2024-01-31 17:27:30,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 1473 transitions, 42169 flow, removed 155 selfloop flow, removed 23 redundant places. [2024-01-31 17:27:30,640 INFO L231 Difference]: Finished difference. Result has 775 places, 1353 transitions, 40459 flow [2024-01-31 17:27:30,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=32773, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=788, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=40459, PETRI_PLACES=775, PETRI_TRANSITIONS=1353} [2024-01-31 17:27:30,641 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 753 predicate places. [2024-01-31 17:27:30,641 INFO L495 AbstractCegarLoop]: Abstraction has has 775 places, 1353 transitions, 40459 flow [2024-01-31 17:27:30,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.705882352941177) internal successors, (80), 17 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:30,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:30,642 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:30,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-01-31 17:27:30,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-01-31 17:27:30,856 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:30,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:30,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1874193819, now seen corresponding path program 19 times [2024-01-31 17:27:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:30,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486954363] [2024-01-31 17:27:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:30,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:31,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:31,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486954363] [2024-01-31 17:27:31,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486954363] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:31,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547354875] [2024-01-31 17:27:31,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:27:31,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:31,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:31,005 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:31,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-01-31 17:27:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:31,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 17:27:31,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:31,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:31,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547354875] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:31,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:31,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-01-31 17:27:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624564344] [2024-01-31 17:27:31,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:31,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-01-31 17:27:31,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:31,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-01-31 17:27:31,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2024-01-31 17:27:31,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:27:31,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 775 places, 1353 transitions, 40459 flow. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:31,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:31,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:27:31,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:37,022 INFO L124 PetriNetUnfolderBase]: 4277/7723 cut-off events. [2024-01-31 17:27:37,023 INFO L125 PetriNetUnfolderBase]: For 433786/433786 co-relation queries the response was YES. [2024-01-31 17:27:37,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98915 conditions, 7723 events. 4277/7723 cut-off events. For 433786/433786 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 57778 event pairs, 106 based on Foata normal form. 48/7771 useless extension candidates. Maximal degree in co-relation 98544. Up to 1559 conditions per place. [2024-01-31 17:27:37,184 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 598 selfloop transitions, 922 changer transitions 0/1521 dead transitions. [2024-01-31 17:27:37,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 1521 transitions, 46895 flow [2024-01-31 17:27:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-01-31 17:27:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-01-31 17:27:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 257 transitions. [2024-01-31 17:27:37,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220032840722496 [2024-01-31 17:27:37,186 INFO L175 Difference]: Start difference. First operand has 775 places, 1353 transitions, 40459 flow. Second operand 29 states and 257 transitions. [2024-01-31 17:27:37,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 1521 transitions, 46895 flow [2024-01-31 17:27:42,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 1521 transitions, 45623 flow, removed 257 selfloop flow, removed 14 redundant places. [2024-01-31 17:27:42,054 INFO L231 Difference]: Finished difference. Result has 791 places, 1402 transitions, 42922 flow [2024-01-31 17:27:42,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=39115, PETRI_DIFFERENCE_MINUEND_PLACES=761, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=872, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=42922, PETRI_PLACES=791, PETRI_TRANSITIONS=1402} [2024-01-31 17:27:42,055 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 769 predicate places. [2024-01-31 17:27:42,056 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 1402 transitions, 42922 flow [2024-01-31 17:27:42,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:42,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:42,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:42,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-01-31 17:27:42,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:42,257 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:42,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:42,257 INFO L85 PathProgramCache]: Analyzing trace with hash -931210563, now seen corresponding path program 20 times [2024-01-31 17:27:42,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:42,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637119396] [2024-01-31 17:27:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:42,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:42,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:42,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637119396] [2024-01-31 17:27:42,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637119396] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:42,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873381909] [2024-01-31 17:27:42,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:27:42,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:42,402 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:42,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-01-31 17:27:42,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:27:42,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:42,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-31 17:27:42,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:42,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:42,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873381909] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:42,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:42,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-01-31 17:27:42,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039057661] [2024-01-31 17:27:42,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:42,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-31 17:27:42,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-31 17:27:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-01-31 17:27:42,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:27:42,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 1402 transitions, 42922 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:42,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:42,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:27:42,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:49,886 INFO L124 PetriNetUnfolderBase]: 4242/7671 cut-off events. [2024-01-31 17:27:49,886 INFO L125 PetriNetUnfolderBase]: For 438420/438420 co-relation queries the response was YES. [2024-01-31 17:27:50,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99599 conditions, 7671 events. 4242/7671 cut-off events. For 438420/438420 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 57507 event pairs, 110 based on Foata normal form. 40/7711 useless extension candidates. Maximal degree in co-relation 99227. Up to 2120 conditions per place. [2024-01-31 17:27:50,061 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 580 selfloop transitions, 957 changer transitions 0/1538 dead transitions. [2024-01-31 17:27:50,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 1538 transitions, 47554 flow [2024-01-31 17:27:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-31 17:27:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-31 17:27:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 331 transitions. [2024-01-31 17:27:50,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425997425997426 [2024-01-31 17:27:50,062 INFO L175 Difference]: Start difference. First operand has 791 places, 1402 transitions, 42922 flow. Second operand 37 states and 331 transitions. [2024-01-31 17:27:50,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 1538 transitions, 47554 flow [2024-01-31 17:27:55,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 810 places, 1538 transitions, 46266 flow, removed 234 selfloop flow, removed 16 redundant places. [2024-01-31 17:27:55,618 INFO L231 Difference]: Finished difference. Result has 814 places, 1404 transitions, 43965 flow [2024-01-31 17:27:55,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=41408, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=949, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=43965, PETRI_PLACES=814, PETRI_TRANSITIONS=1404} [2024-01-31 17:27:55,619 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 792 predicate places. [2024-01-31 17:27:55,619 INFO L495 AbstractCegarLoop]: Abstraction has has 814 places, 1404 transitions, 43965 flow [2024-01-31 17:27:55,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:55,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:55,619 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:55,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-01-31 17:27:55,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:55,820 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:27:55,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:55,821 INFO L85 PathProgramCache]: Analyzing trace with hash -813634015, now seen corresponding path program 21 times [2024-01-31 17:27:55,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:55,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288663401] [2024-01-31 17:27:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:55,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:27:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:55,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:55,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288663401] [2024-01-31 17:27:55,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288663401] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:27:55,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677670729] [2024-01-31 17:27:55,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:27:55,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:55,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:55,999 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:56,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-01-31 17:27:56,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-31 17:27:56,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:56,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjunts are in the unsatisfiable core [2024-01-31 17:27:56,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:56,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:27:56,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677670729] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:56,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 17:27:56,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-01-31 17:27:56,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509961235] [2024-01-31 17:27:56,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:56,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-01-31 17:27:56,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:56,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-01-31 17:27:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2024-01-31 17:27:56,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-01-31 17:27:56,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 814 places, 1404 transitions, 43965 flow. Second operand has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:27:56,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:56,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-01-31 17:27:56,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:28:02,639 INFO L124 PetriNetUnfolderBase]: 4250/7711 cut-off events. [2024-01-31 17:28:02,639 INFO L125 PetriNetUnfolderBase]: For 433246/433246 co-relation queries the response was YES. [2024-01-31 17:28:02,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101470 conditions, 7711 events. 4250/7711 cut-off events. For 433246/433246 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 57876 event pairs, 769 based on Foata normal form. 48/7759 useless extension candidates. Maximal degree in co-relation 101095. Up to 2761 conditions per place. [2024-01-31 17:28:02,794 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 820 selfloop transitions, 661 changer transitions 0/1482 dead transitions. [2024-01-31 17:28:02,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 833 places, 1482 transitions, 47707 flow [2024-01-31 17:28:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-01-31 17:28:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-01-31 17:28:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 167 transitions. [2024-01-31 17:28:02,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-01-31 17:28:02,795 INFO L175 Difference]: Start difference. First operand has 814 places, 1404 transitions, 43965 flow. Second operand 20 states and 167 transitions. [2024-01-31 17:28:02,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 833 places, 1482 transitions, 47707 flow [2024-01-31 17:28:08,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 811 places, 1482 transitions, 46525 flow, removed 136 selfloop flow, removed 22 redundant places. [2024-01-31 17:28:08,278 INFO L231 Difference]: Finished difference. Result has 813 places, 1407 transitions, 44159 flow [2024-01-31 17:28:08,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=42649, PETRI_DIFFERENCE_MINUEND_PLACES=792, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=44159, PETRI_PLACES=813, PETRI_TRANSITIONS=1407} [2024-01-31 17:28:08,280 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 791 predicate places. [2024-01-31 17:28:08,280 INFO L495 AbstractCegarLoop]: Abstraction has has 813 places, 1407 transitions, 44159 flow [2024-01-31 17:28:08,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.75) internal successors, (95), 20 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:28:08,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:28:08,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:28:08,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-01-31 17:28:08,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-01-31 17:28:08,481 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-31 17:28:08,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:28:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1043775991, now seen corresponding path program 30 times [2024-01-31 17:28:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:28:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111672698] [2024-01-31 17:28:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:28:08,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:28:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:28:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 17:28:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:28:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111672698] [2024-01-31 17:28:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111672698] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 17:28:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126550198] [2024-01-31 17:28:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:28:08,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:28:08,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:28:08,648 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:28:08,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-01-31 17:28:08,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:28:08,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:28:08,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 54 conjunts are in the unsatisfiable core [2024-01-31 17:28:08,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:28:08,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:28:08,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-01-31 17:28:09,396 INFO L349 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2024-01-31 17:28:09,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 209 treesize of output 114 [2024-01-31 17:28:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:28:09,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:28:10,958 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 442 treesize of output 406 [2024-01-31 17:28:12,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-31 17:28:12,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 353724 treesize of output 185052