./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/chl-array-int-subst.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/chl-array-int-subst.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/chl-array-int-subst.wvr.c ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-array-int-subst.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 16:46:06,114 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 16:46:06,193 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 16:46:06,199 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 16:46:06,200 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 16:46:06,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 16:46:06,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 16:46:06,246 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 16:46:06,247 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 16:46:06,251 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 16:46:06,251 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 16:46:06,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 16:46:06,253 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 16:46:06,254 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 16:46:06,255 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 16:46:06,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 16:46:06,255 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 16:46:06,256 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 16:46:06,256 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 16:46:06,256 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 16:46:06,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 16:46:06,257 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 16:46:06,257 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 16:46:06,257 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 16:46:06,258 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 16:46:06,258 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 16:46:06,258 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 16:46:06,259 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 16:46:06,259 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 16:46:06,259 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 16:46:06,261 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 16:46:06,261 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 16:46:06,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:46:06,261 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 16:46:06,261 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 16:46:06,262 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 16:46:06,262 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 16:46:06,262 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 16:46:06,262 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 16:46:06,263 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 16:46:06,263 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 16:46:06,263 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 16:46:06,263 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 16:46:06,264 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 16:46:06,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 16:46:06,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 16:46:06,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 16:46:06,586 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 16:46:06,587 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 16:46:06,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2024-01-31 16:46:07,829 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 16:46:08,058 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 16:46:08,059 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-array-int-subst.wvr.c [2024-01-31 16:46:08,066 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4e0e99cc/25e70388c86941009a263e1a20695b12/FLAGc1bb7603a [2024-01-31 16:46:08,076 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4e0e99cc/25e70388c86941009a263e1a20695b12 [2024-01-31 16:46:08,079 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 16:46:08,079 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 16:46:08,081 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/chl-array-int-subst.wvr.yml/witness.yml [2024-01-31 16:46:08,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 16:46:08,275 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 16:46:08,276 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 16:46:08,276 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 16:46:08,280 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 16:46:08,281 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:08" (1/2) ... [2024-01-31 16:46:08,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6617e5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:08, skipping insertion in model container [2024-01-31 16:46:08,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 04:46:08" (1/2) ... [2024-01-31 16:46:08,283 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@380d0a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 04:46:08, skipping insertion in model container [2024-01-31 16:46:08,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:08" (2/2) ... [2024-01-31 16:46:08,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6617e5c5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:46:08, skipping insertion in model container [2024-01-31 16:46:08,284 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:08" (2/2) ... [2024-01-31 16:46:08,284 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 16:46:08,329 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 16:46:08,330 INFO L98 nessWitnessExtractor]: Location invariant after [L62-L62] (unsigned long )_argptr == 0UL [2024-01-31 16:46:08,330 INFO L98 nessWitnessExtractor]: Location invariant after [L48-L48] (unsigned long )_argptr == 0UL [2024-01-31 16:46:08,330 INFO L98 nessWitnessExtractor]: Location invariant after [L76-L76] (unsigned long )_argptr == 0UL [2024-01-31 16:46:08,352 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 16:46:08,526 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/chl-array-int-subst.wvr.c[2820,2833] [2024-01-31 16:46:08,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:46:08,556 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 16:46:08,572 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:46:08,578 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:46:08,586 WARN L424 MainDispatcher]: Unable to annotate int with a witness entry [2024-01-31 16:46:08,591 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/chl-array-int-subst.wvr.c[2820,2833] [2024-01-31 16:46:08,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 16:46:08,610 INFO L208 MainTranslator]: Completed translation [2024-01-31 16:46:08,610 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 04:46:08 WrapperNode [2024-01-31 16:46:08,611 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 16:46:08,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 16:46:08,612 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 16:46:08,612 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 16:46:08,617 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,641 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,679 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 292 [2024-01-31 16:46:08,682 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 16:46:08,682 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 16:46:08,683 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 16:46:08,683 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 16:46:08,691 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,692 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,704 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,729 INFO L175 MemorySlicer]: Split 23 memory accesses to 5 slices as follows [2, 2, 2, 2, 15]. 65 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 3]. [2024-01-31 16:46:08,730 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,730 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,740 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,758 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,760 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,762 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,767 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 16:46:08,770 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 16:46:08,770 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 16:46:08,770 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 16:46:08,771 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 04:46:08" (1/1) ... [2024-01-31 16:46:08,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 16:46:08,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:08,801 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 16:46:08,829 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 16:46:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 16:46:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 16:46:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 16:46:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 16:46:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 16:46:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 16:46:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 16:46:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 16:46:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 16:46:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 16:46:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 16:46:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 16:46:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-31 16:46:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-31 16:46:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-31 16:46:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-31 16:46:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-31 16:46:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-31 16:46:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 16:46:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 16:46:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 16:46:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 16:46:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 16:46:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-31 16:46:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 16:46:08,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 16:46:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 16:46:08,854 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 16:46:08,989 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 16:46:08,991 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 16:46:09,379 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 16:46:09,379 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 16:46:09,683 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 16:46:09,683 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-01-31 16:46:09,683 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:09 BoogieIcfgContainer [2024-01-31 16:46:09,683 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 16:46:09,685 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 16:46:09,685 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 16:46:09,688 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 16:46:09,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 04:46:08" (1/4) ... [2024-01-31 16:46:09,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d74ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 04:46:09, skipping insertion in model container [2024-01-31 16:46:09,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 04:46:08" (2/4) ... [2024-01-31 16:46:09,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d74ac6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:46:09, skipping insertion in model container [2024-01-31 16:46:09,689 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 04:46:08" (3/4) ... [2024-01-31 16:46:09,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70d74ac6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 04:46:09, skipping insertion in model container [2024-01-31 16:46:09,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 04:46:09" (4/4) ... [2024-01-31 16:46:09,690 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2024-01-31 16:46:09,705 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 16:46:09,705 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-31 16:46:09,705 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 16:46:09,747 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-01-31 16:46:09,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 105 flow [2024-01-31 16:46:09,793 INFO L124 PetriNetUnfolderBase]: 9/39 cut-off events. [2024-01-31 16:46:09,794 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:46:09,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 39 events. 9/39 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-01-31 16:46:09,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 105 flow [2024-01-31 16:46:09,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 38 transitions, 94 flow [2024-01-31 16:46:09,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 16:46:09,822 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;@428e323d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 16:46:09,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-01-31 16:46:09,838 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 16:46:09,838 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2024-01-31 16:46:09,838 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-31 16:46:09,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:09,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:09,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:09,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:09,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1310840306, now seen corresponding path program 1 times [2024-01-31 16:46:09,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:09,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904267488] [2024-01-31 16:46:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:09,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:10,803 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 16:46:10,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:10,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904267488] [2024-01-31 16:46:10,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904267488] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:10,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:10,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:46:10,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192850159] [2024-01-31 16:46:10,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:10,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:10,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:46:10,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:10,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:10,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:10,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:10,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:11,571 INFO L124 PetriNetUnfolderBase]: 2963/4045 cut-off events. [2024-01-31 16:46:11,571 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-01-31 16:46:11,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8312 conditions, 4045 events. 2963/4045 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16424 event pairs, 268 based on Foata normal form. 1/2916 useless extension candidates. Maximal degree in co-relation 4518. Up to 1349 conditions per place. [2024-01-31 16:46:11,592 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 16 changer transitions 1/142 dead transitions. [2024-01-31 16:46:11,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 142 transitions, 632 flow [2024-01-31 16:46:11,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-01-31 16:46:11,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-01-31 16:46:11,603 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 94 flow. Second operand 10 states and 182 transitions. [2024-01-31 16:46:11,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 142 transitions, 632 flow [2024-01-31 16:46:11,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 142 transitions, 588 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-01-31 16:46:11,610 INFO L231 Difference]: Finished difference. Result has 46 places, 54 transitions, 182 flow [2024-01-31 16:46:11,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=182, PETRI_PLACES=46, PETRI_TRANSITIONS=54} [2024-01-31 16:46:11,614 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2024-01-31 16:46:11,615 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 54 transitions, 182 flow [2024-01-31 16:46:11,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:11,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:11,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:11,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-31 16:46:11,616 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:11,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash 223476662, now seen corresponding path program 2 times [2024-01-31 16:46:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924908812] [2024-01-31 16:46:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:11,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:11,934 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 16:46:11,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:11,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924908812] [2024-01-31 16:46:11,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924908812] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:11,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:11,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 16:46:11,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018648155] [2024-01-31 16:46:11,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:11,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:11,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:11,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:11,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-01-31 16:46:11,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:11,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 54 transitions, 182 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:11,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:11,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:11,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:12,448 INFO L124 PetriNetUnfolderBase]: 3361/4649 cut-off events. [2024-01-31 16:46:12,448 INFO L125 PetriNetUnfolderBase]: For 643/643 co-relation queries the response was YES. [2024-01-31 16:46:12,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10220 conditions, 4649 events. 3361/4649 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19798 event pairs, 1194 based on Foata normal form. 1/3818 useless extension candidates. Maximal degree in co-relation 10196. Up to 1985 conditions per place. [2024-01-31 16:46:12,470 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 116 selfloop transitions, 14 changer transitions 1/132 dead transitions. [2024-01-31 16:46:12,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 132 transitions, 627 flow [2024-01-31 16:46:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 16:46:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 16:46:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-01-31 16:46:12,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-01-31 16:46:12,472 INFO L175 Difference]: Start difference. First operand has 46 places, 54 transitions, 182 flow. Second operand 9 states and 164 transitions. [2024-01-31 16:46:12,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 132 transitions, 627 flow [2024-01-31 16:46:12,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 132 transitions, 621 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-01-31 16:46:12,476 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 227 flow [2024-01-31 16:46:12,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=227, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2024-01-31 16:46:12,477 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2024-01-31 16:46:12,477 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 227 flow [2024-01-31 16:46:12,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:12,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:12,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:12,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 16:46:12,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:12,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:12,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1310299412, now seen corresponding path program 1 times [2024-01-31 16:46:12,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:12,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073548303] [2024-01-31 16:46:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:12,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:12,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:12,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073548303] [2024-01-31 16:46:12,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073548303] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:12,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039955168] [2024-01-31 16:46:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:12,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:12,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:12,623 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 16:46:12,656 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 16:46:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:12,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:46:12,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:12,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:12,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039955168] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:12,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:12,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2024-01-31 16:46:12,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061663833] [2024-01-31 16:46:12,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:12,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 16:46:12,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:12,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 16:46:12,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-01-31 16:46:12,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:12,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:12,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:12,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:12,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:13,515 INFO L124 PetriNetUnfolderBase]: 4810/6659 cut-off events. [2024-01-31 16:46:13,515 INFO L125 PetriNetUnfolderBase]: For 1912/1912 co-relation queries the response was YES. [2024-01-31 16:46:13,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 6659 events. 4810/6659 cut-off events. For 1912/1912 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29963 event pairs, 2572 based on Foata normal form. 1/5505 useless extension candidates. Maximal degree in co-relation 12196. Up to 3223 conditions per place. [2024-01-31 16:46:13,546 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 128 selfloop transitions, 8 changer transitions 7/144 dead transitions. [2024-01-31 16:46:13,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 144 transitions, 756 flow [2024-01-31 16:46:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:46:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:46:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-01-31 16:46:13,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-01-31 16:46:13,548 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 227 flow. Second operand 6 states and 155 transitions. [2024-01-31 16:46:13,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 144 transitions, 756 flow [2024-01-31 16:46:13,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 144 transitions, 738 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:13,558 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 244 flow [2024-01-31 16:46:13,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-01-31 16:46:13,559 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2024-01-31 16:46:13,559 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 244 flow [2024-01-31 16:46:13,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:13,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:13,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:13,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-31 16:46:13,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:13,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:13,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2084236390, now seen corresponding path program 1 times [2024-01-31 16:46:13,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:13,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293971752] [2024-01-31 16:46:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:13,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:13,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:13,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:13,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293971752] [2024-01-31 16:46:13,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293971752] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:13,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098382051] [2024-01-31 16:46:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:13,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:13,881 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 16:46:13,909 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 16:46:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:13,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:46:13,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:14,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:14,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098382051] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:14,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:14,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-01-31 16:46:14,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035202177] [2024-01-31 16:46:14,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:14,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:14,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:14,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:14,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-01-31 16:46:14,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:14,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:14,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:14,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:14,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:15,172 INFO L124 PetriNetUnfolderBase]: 7299/10084 cut-off events. [2024-01-31 16:46:15,172 INFO L125 PetriNetUnfolderBase]: For 3548/3548 co-relation queries the response was YES. [2024-01-31 16:46:15,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24234 conditions, 10084 events. 7299/10084 cut-off events. For 3548/3548 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 48093 event pairs, 4094 based on Foata normal form. 1/8743 useless extension candidates. Maximal degree in co-relation 18780. Up to 6649 conditions per place. [2024-01-31 16:46:15,226 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 140 selfloop transitions, 8 changer transitions 7/156 dead transitions. [2024-01-31 16:46:15,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 156 transitions, 849 flow [2024-01-31 16:46:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-01-31 16:46:15,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-01-31 16:46:15,229 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 244 flow. Second operand 7 states and 159 transitions. [2024-01-31 16:46:15,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 156 transitions, 849 flow [2024-01-31 16:46:15,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 156 transitions, 838 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:15,241 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 283 flow [2024-01-31 16:46:15,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=283, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-01-31 16:46:15,244 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2024-01-31 16:46:15,244 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 283 flow [2024-01-31 16:46:15,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:15,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:15,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:15,277 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 16:46:15,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-01-31 16:46:15,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:15,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:15,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1724503114, now seen corresponding path program 1 times [2024-01-31 16:46:15,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:15,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092754426] [2024-01-31 16:46:15,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:15,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:15,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:15,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092754426] [2024-01-31 16:46:15,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092754426] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:15,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200626692] [2024-01-31 16:46:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:15,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:15,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:15,792 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 16:46:15,818 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 16:46:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:15,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:46:15,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:16,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:16,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200626692] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:16,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:16,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2024-01-31 16:46:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414269035] [2024-01-31 16:46:16,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:16,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:16,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2024-01-31 16:46:16,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:16,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 283 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 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 16:46:16,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:16,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:16,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:17,348 INFO L124 PetriNetUnfolderBase]: 8221/11360 cut-off events. [2024-01-31 16:46:17,348 INFO L125 PetriNetUnfolderBase]: For 5553/5553 co-relation queries the response was YES. [2024-01-31 16:46:17,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28026 conditions, 11360 events. 8221/11360 cut-off events. For 5553/5553 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 56587 event pairs, 1302 based on Foata normal form. 1/9841 useless extension candidates. Maximal degree in co-relation 22087. Up to 5195 conditions per place. [2024-01-31 16:46:17,399 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 184 selfloop transitions, 18 changer transitions 1/204 dead transitions. [2024-01-31 16:46:17,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 204 transitions, 1126 flow [2024-01-31 16:46:17,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:46:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:46:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-01-31 16:46:17,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043290043290043 [2024-01-31 16:46:17,401 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 283 flow. Second operand 11 states and 233 transitions. [2024-01-31 16:46:17,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 204 transitions, 1126 flow [2024-01-31 16:46:17,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 204 transitions, 1107 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-31 16:46:17,417 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 360 flow [2024-01-31 16:46:17,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=360, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-01-31 16:46:17,419 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 36 predicate places. [2024-01-31 16:46:17,420 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 360 flow [2024-01-31 16:46:17,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 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 16:46:17,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:17,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:17,435 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 16:46:17,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:17,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:17,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:17,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1950822736, now seen corresponding path program 2 times [2024-01-31 16:46:17,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:17,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307831230] [2024-01-31 16:46:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:17,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:17,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:17,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307831230] [2024-01-31 16:46:17,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307831230] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:17,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832710275] [2024-01-31 16:46:17,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:46:17,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:17,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:17,943 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 16:46:17,976 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 16:46:18,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:46:18,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:18,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:46:18,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:18,184 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 16:46:18,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832710275] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:18,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:18,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-01-31 16:46:18,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84684008] [2024-01-31 16:46:18,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:18,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:18,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:18,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:18,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:46:18,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:18,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 360 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:18,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:18,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:18,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:19,913 INFO L124 PetriNetUnfolderBase]: 13686/18984 cut-off events. [2024-01-31 16:46:19,913 INFO L125 PetriNetUnfolderBase]: For 13947/13947 co-relation queries the response was YES. [2024-01-31 16:46:19,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48587 conditions, 18984 events. 13686/18984 cut-off events. For 13947/13947 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 103707 event pairs, 2662 based on Foata normal form. 1/16378 useless extension candidates. Maximal degree in co-relation 41201. Up to 6260 conditions per place. [2024-01-31 16:46:20,002 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 177 selfloop transitions, 49 changer transitions 1/228 dead transitions. [2024-01-31 16:46:20,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 228 transitions, 1497 flow [2024-01-31 16:46:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:20,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-01-31 16:46:20,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-01-31 16:46:20,003 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 360 flow. Second operand 10 states and 198 transitions. [2024-01-31 16:46:20,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 228 transitions, 1497 flow [2024-01-31 16:46:20,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 228 transitions, 1411 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:20,069 INFO L231 Difference]: Finished difference. Result has 85 places, 109 transitions, 784 flow [2024-01-31 16:46:20,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=784, PETRI_PLACES=85, PETRI_TRANSITIONS=109} [2024-01-31 16:46:20,070 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 46 predicate places. [2024-01-31 16:46:20,070 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 109 transitions, 784 flow [2024-01-31 16:46:20,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:20,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:20,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:20,082 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 16:46:20,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:20,283 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:20,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:20,285 INFO L85 PathProgramCache]: Analyzing trace with hash 457740556, now seen corresponding path program 3 times [2024-01-31 16:46:20,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:20,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001060357] [2024-01-31 16:46:20,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:20,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:20,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:20,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:20,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001060357] [2024-01-31 16:46:20,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001060357] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:20,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504162341] [2024-01-31 16:46:20,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:46:20,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:20,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:20,581 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 16:46:20,583 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 16:46:20,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:46:20,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:20,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:46:20,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:20,840 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 16:46:20,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:20,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504162341] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:20,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:20,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-01-31 16:46:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575993652] [2024-01-31 16:46:20,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:20,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:20,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:20,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:46:20,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:20,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 109 transitions, 784 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:20,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:20,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:20,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:22,864 INFO L124 PetriNetUnfolderBase]: 16920/23505 cut-off events. [2024-01-31 16:46:22,864 INFO L125 PetriNetUnfolderBase]: For 31122/31122 co-relation queries the response was YES. [2024-01-31 16:46:22,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65342 conditions, 23505 events. 16920/23505 cut-off events. For 31122/31122 co-relation queries the response was YES. Maximal size of possible extension queue 997. Compared 131147 event pairs, 2842 based on Foata normal form. 1/20257 useless extension candidates. Maximal degree in co-relation 52229. Up to 8228 conditions per place. [2024-01-31 16:46:22,992 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 155 selfloop transitions, 68 changer transitions 1/225 dead transitions. [2024-01-31 16:46:22,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 225 transitions, 1715 flow [2024-01-31 16:46:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-01-31 16:46:22,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-01-31 16:46:22,994 INFO L175 Difference]: Start difference. First operand has 85 places, 109 transitions, 784 flow. Second operand 10 states and 194 transitions. [2024-01-31 16:46:22,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 225 transitions, 1715 flow [2024-01-31 16:46:23,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 225 transitions, 1683 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:23,146 INFO L231 Difference]: Finished difference. Result has 97 places, 125 transitions, 1164 flow [2024-01-31 16:46:23,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1164, PETRI_PLACES=97, PETRI_TRANSITIONS=125} [2024-01-31 16:46:23,147 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 58 predicate places. [2024-01-31 16:46:23,148 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 125 transitions, 1164 flow [2024-01-31 16:46:23,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:23,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:23,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:23,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-31 16:46:23,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:23,360 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:23,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1125886898, now seen corresponding path program 1 times [2024-01-31 16:46:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:23,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711908927] [2024-01-31 16:46:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:23,430 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 16:46:23,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:23,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711908927] [2024-01-31 16:46:23,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711908927] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:23,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:23,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:46:23,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690582029] [2024-01-31 16:46:23,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:23,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:46:23,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:46:23,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:46:23,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:23,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 125 transitions, 1164 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:23,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:23,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:23,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:24,738 INFO L124 PetriNetUnfolderBase]: 10841/15632 cut-off events. [2024-01-31 16:46:24,738 INFO L125 PetriNetUnfolderBase]: For 33634/33634 co-relation queries the response was YES. [2024-01-31 16:46:24,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45754 conditions, 15632 events. 10841/15632 cut-off events. For 33634/33634 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 89107 event pairs, 4138 based on Foata normal form. 0/13956 useless extension candidates. Maximal degree in co-relation 41069. Up to 10424 conditions per place. [2024-01-31 16:46:24,810 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 127 selfloop transitions, 25 changer transitions 0/153 dead transitions. [2024-01-31 16:46:24,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 153 transitions, 1436 flow [2024-01-31 16:46:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:46:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:46:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-01-31 16:46:24,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-01-31 16:46:24,812 INFO L175 Difference]: Start difference. First operand has 97 places, 125 transitions, 1164 flow. Second operand 6 states and 112 transitions. [2024-01-31 16:46:24,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 153 transitions, 1436 flow [2024-01-31 16:46:24,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 153 transitions, 1382 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:24,941 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 963 flow [2024-01-31 16:46:24,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=963, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-01-31 16:46:24,941 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 58 predicate places. [2024-01-31 16:46:24,942 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 963 flow [2024-01-31 16:46:24,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:24,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:24,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:24,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-31 16:46:24,942 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:24,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:24,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1394967700, now seen corresponding path program 1 times [2024-01-31 16:46:24,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:24,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693639121] [2024-01-31 16:46:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:24,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:25,014 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 16:46:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693639121] [2024-01-31 16:46:25,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693639121] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:25,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:25,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:25,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266746971] [2024-01-31 16:46:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:46:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:46:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:46:25,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:25,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 963 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:25,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:25,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:25,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:26,068 INFO L124 PetriNetUnfolderBase]: 7658/11359 cut-off events. [2024-01-31 16:46:26,068 INFO L125 PetriNetUnfolderBase]: For 25284/25284 co-relation queries the response was YES. [2024-01-31 16:46:26,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32679 conditions, 11359 events. 7658/11359 cut-off events. For 25284/25284 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 65723 event pairs, 3421 based on Foata normal form. 0/10547 useless extension candidates. Maximal degree in co-relation 30401. Up to 5448 conditions per place. [2024-01-31 16:46:26,105 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 126 selfloop transitions, 8 changer transitions 16/151 dead transitions. [2024-01-31 16:46:26,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 151 transitions, 1381 flow [2024-01-31 16:46:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:46:26,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:46:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-01-31 16:46:26,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-01-31 16:46:26,107 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 963 flow. Second operand 5 states and 108 transitions. [2024-01-31 16:46:26,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 151 transitions, 1381 flow [2024-01-31 16:46:26,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 151 transitions, 1305 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:26,171 INFO L231 Difference]: Finished difference. Result has 97 places, 88 transitions, 677 flow [2024-01-31 16:46:26,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=677, PETRI_PLACES=97, PETRI_TRANSITIONS=88} [2024-01-31 16:46:26,172 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 58 predicate places. [2024-01-31 16:46:26,172 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 88 transitions, 677 flow [2024-01-31 16:46:26,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:26,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:26,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:26,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-31 16:46:26,173 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:26,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash 643701842, now seen corresponding path program 4 times [2024-01-31 16:46:26,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:26,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802939263] [2024-01-31 16:46:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:26,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:26,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:26,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802939263] [2024-01-31 16:46:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802939263] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155541857] [2024-01-31 16:46:26,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:46:26,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:26,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:26,369 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 16:46:26,403 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 16:46:26,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:46:26,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:26,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:46:26,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:26,516 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 16:46:26,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:26,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155541857] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:26,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:26,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2024-01-31 16:46:26,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102301210] [2024-01-31 16:46:26,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:26,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:46:26,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:26,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:46:26,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-01-31 16:46:26,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:26,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 88 transitions, 677 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:26,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:26,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:26,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:27,463 INFO L124 PetriNetUnfolderBase]: 7798/11211 cut-off events. [2024-01-31 16:46:27,463 INFO L125 PetriNetUnfolderBase]: For 19670/19670 co-relation queries the response was YES. [2024-01-31 16:46:27,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31939 conditions, 11211 events. 7798/11211 cut-off events. For 19670/19670 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 60879 event pairs, 840 based on Foata normal form. 2/10705 useless extension candidates. Maximal degree in co-relation 31828. Up to 4481 conditions per place. [2024-01-31 16:46:27,504 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 44 changer transitions 1/171 dead transitions. [2024-01-31 16:46:27,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 171 transitions, 1413 flow [2024-01-31 16:46:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:46:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:46:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-01-31 16:46:27,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-01-31 16:46:27,506 INFO L175 Difference]: Start difference. First operand has 97 places, 88 transitions, 677 flow. Second operand 6 states and 134 transitions. [2024-01-31 16:46:27,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 171 transitions, 1413 flow [2024-01-31 16:46:27,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 171 transitions, 1369 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-01-31 16:46:27,539 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1002 flow [2024-01-31 16:46:27,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1002, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2024-01-31 16:46:27,540 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 53 predicate places. [2024-01-31 16:46:27,540 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1002 flow [2024-01-31 16:46:27,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:27,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:27,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:27,552 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 16:46:27,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:27,752 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:27,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:27,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1954180808, now seen corresponding path program 1 times [2024-01-31 16:46:27,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:27,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61517813] [2024-01-31 16:46:27,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:27,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:27,853 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 16:46:27,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:27,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61517813] [2024-01-31 16:46:27,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61517813] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:27,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:27,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:27,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065615996] [2024-01-31 16:46:27,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:27,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:46:27,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:46:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:46:27,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:27,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1002 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:27,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:27,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:27,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:28,604 INFO L124 PetriNetUnfolderBase]: 6552/9468 cut-off events. [2024-01-31 16:46:28,604 INFO L125 PetriNetUnfolderBase]: For 26542/26542 co-relation queries the response was YES. [2024-01-31 16:46:28,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29130 conditions, 9468 events. 6552/9468 cut-off events. For 26542/26542 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 50649 event pairs, 3794 based on Foata normal form. 0/9154 useless extension candidates. Maximal degree in co-relation 23315. Up to 6953 conditions per place. [2024-01-31 16:46:28,652 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 75 selfloop transitions, 2 changer transitions 62/140 dead transitions. [2024-01-31 16:46:28,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 140 transitions, 1358 flow [2024-01-31 16:46:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 16:46:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 16:46:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-01-31 16:46:28,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-01-31 16:46:28,653 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1002 flow. Second operand 5 states and 101 transitions. [2024-01-31 16:46:28,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 140 transitions, 1358 flow [2024-01-31 16:46:28,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 140 transitions, 1298 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-01-31 16:46:28,738 INFO L231 Difference]: Finished difference. Result has 96 places, 78 transitions, 610 flow [2024-01-31 16:46:28,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=610, PETRI_PLACES=96, PETRI_TRANSITIONS=78} [2024-01-31 16:46:28,738 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 57 predicate places. [2024-01-31 16:46:28,739 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 78 transitions, 610 flow [2024-01-31 16:46:28,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:28,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:28,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:28,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-31 16:46:28,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:28,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash 865069364, now seen corresponding path program 1 times [2024-01-31 16:46:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:28,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230404713] [2024-01-31 16:46:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:28,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:28,810 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 16:46:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230404713] [2024-01-31 16:46:28,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230404713] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:28,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:28,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:46:28,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213740152] [2024-01-31 16:46:28,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:28,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:46:28,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:28,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:46:28,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:46:28,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:28,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 78 transitions, 610 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:28,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:28,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:28,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:29,306 INFO L124 PetriNetUnfolderBase]: 3869/5475 cut-off events. [2024-01-31 16:46:29,306 INFO L125 PetriNetUnfolderBase]: For 12612/12612 co-relation queries the response was YES. [2024-01-31 16:46:29,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16392 conditions, 5475 events. 3869/5475 cut-off events. For 12612/12612 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25514 event pairs, 1921 based on Foata normal form. 154/5626 useless extension candidates. Maximal degree in co-relation 16350. Up to 3328 conditions per place. [2024-01-31 16:46:29,332 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 49 selfloop transitions, 2 changer transitions 54/106 dead transitions. [2024-01-31 16:46:29,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 106 transitions, 839 flow [2024-01-31 16:46:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 16:46:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 16:46:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-01-31 16:46:29,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-01-31 16:46:29,334 INFO L175 Difference]: Start difference. First operand has 96 places, 78 transitions, 610 flow. Second operand 6 states and 105 transitions. [2024-01-31 16:46:29,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 106 transitions, 839 flow [2024-01-31 16:46:29,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 779 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-01-31 16:46:29,364 INFO L231 Difference]: Finished difference. Result has 79 places, 52 transitions, 267 flow [2024-01-31 16:46:29,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=79, PETRI_TRANSITIONS=52} [2024-01-31 16:46:29,365 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 40 predicate places. [2024-01-31 16:46:29,365 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 52 transitions, 267 flow [2024-01-31 16:46:29,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:29,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:29,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:29,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-31 16:46:29,366 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:29,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2023832690, now seen corresponding path program 1 times [2024-01-31 16:46:29,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:29,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967118831] [2024-01-31 16:46:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:29,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:29,464 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 16:46:29,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967118831] [2024-01-31 16:46:29,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967118831] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233301844] [2024-01-31 16:46:29,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:29,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:29,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:29,466 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 16:46:29,468 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 16:46:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:29,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-31 16:46:29,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:29,632 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 16:46:29,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 16:46:29,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233301844] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:29,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:29,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2024-01-31 16:46:29,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412658965] [2024-01-31 16:46:29,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:29,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:29,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-01-31 16:46:29,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:29,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:29,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:29,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:29,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:30,080 INFO L124 PetriNetUnfolderBase]: 3384/4678 cut-off events. [2024-01-31 16:46:30,080 INFO L125 PetriNetUnfolderBase]: For 7422/7422 co-relation queries the response was YES. [2024-01-31 16:46:30,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13556 conditions, 4678 events. 3384/4678 cut-off events. For 7422/7422 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19781 event pairs, 1603 based on Foata normal form. 154/4578 useless extension candidates. Maximal degree in co-relation 13515. Up to 2507 conditions per place. [2024-01-31 16:46:30,100 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 73 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2024-01-31 16:46:30,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 577 flow [2024-01-31 16:46:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 16:46:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 16:46:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2024-01-31 16:46:30,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3163265306122449 [2024-01-31 16:46:30,102 INFO L175 Difference]: Start difference. First operand has 79 places, 52 transitions, 267 flow. Second operand 7 states and 93 transitions. [2024-01-31 16:46:30,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 577 flow [2024-01-31 16:46:30,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 505 flow, removed 34 selfloop flow, removed 13 redundant places. [2024-01-31 16:46:30,121 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 260 flow [2024-01-31 16:46:30,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=260, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-01-31 16:46:30,122 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 20 predicate places. [2024-01-31 16:46:30,122 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 260 flow [2024-01-31 16:46:30,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:30,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:30,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:30,152 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 16:46:30,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:30,334 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:30,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash -74119910, now seen corresponding path program 1 times [2024-01-31 16:46:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:30,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969476053] [2024-01-31 16:46:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:30,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:30,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969476053] [2024-01-31 16:46:30,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969476053] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:30,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:46:30,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 16:46:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462637665] [2024-01-31 16:46:30,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:30,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 16:46:30,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 16:46:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-31 16:46:30,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:30,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 260 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:30,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:30,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:30,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:30,865 INFO L124 PetriNetUnfolderBase]: 3384/4674 cut-off events. [2024-01-31 16:46:30,866 INFO L125 PetriNetUnfolderBase]: For 4445/4445 co-relation queries the response was YES. [2024-01-31 16:46:30,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12968 conditions, 4674 events. 3384/4674 cut-off events. For 4445/4445 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20007 event pairs, 1428 based on Foata normal form. 2/4206 useless extension candidates. Maximal degree in co-relation 12934. Up to 3021 conditions per place. [2024-01-31 16:46:30,879 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 69 selfloop transitions, 3 changer transitions 28/101 dead transitions. [2024-01-31 16:46:30,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 641 flow [2024-01-31 16:46:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-31 16:46:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-31 16:46:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-01-31 16:46:30,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-01-31 16:46:30,880 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 260 flow. Second operand 4 states and 94 transitions. [2024-01-31 16:46:30,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 641 flow [2024-01-31 16:46:30,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 101 transitions, 628 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:30,886 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 235 flow [2024-01-31 16:46:30,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-01-31 16:46:30,887 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 19 predicate places. [2024-01-31 16:46:30,887 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 235 flow [2024-01-31 16:46:30,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:30,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:30,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:30,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-01-31 16:46:30,888 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:30,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:30,888 INFO L85 PathProgramCache]: Analyzing trace with hash -254196320, now seen corresponding path program 1 times [2024-01-31 16:46:30,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:30,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450624945] [2024-01-31 16:46:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:30,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:31,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:31,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450624945] [2024-01-31 16:46:31,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450624945] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:31,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946479745] [2024-01-31 16:46:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:31,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:31,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:31,130 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 16:46:31,158 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 16:46:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:31,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:46:31,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:31,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:31,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946479745] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 16:46:31,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-31 16:46:31,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-01-31 16:46:31,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274725209] [2024-01-31 16:46:31,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-31 16:46:31,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-01-31 16:46:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-01-31 16:46:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-01-31 16:46:31,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:31,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 235 flow. Second operand has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:31,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:31,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:31,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:32,753 INFO L124 PetriNetUnfolderBase]: 7003/9676 cut-off events. [2024-01-31 16:46:32,753 INFO L125 PetriNetUnfolderBase]: For 10404/10404 co-relation queries the response was YES. [2024-01-31 16:46:32,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27022 conditions, 9676 events. 7003/9676 cut-off events. For 10404/10404 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 46973 event pairs, 1616 based on Foata normal form. 1/8652 useless extension candidates. Maximal degree in co-relation 26990. Up to 3740 conditions per place. [2024-01-31 16:46:32,797 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 139 selfloop transitions, 22 changer transitions 1/163 dead transitions. [2024-01-31 16:46:32,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 163 transitions, 989 flow [2024-01-31 16:46:32,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-31 16:46:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-31 16:46:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 192 transitions. [2024-01-31 16:46:32,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-01-31 16:46:32,799 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 235 flow. Second operand 12 states and 192 transitions. [2024-01-31 16:46:32,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 163 transitions, 989 flow [2024-01-31 16:46:32,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 163 transitions, 955 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:32,819 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 421 flow [2024-01-31 16:46:32,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=421, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-01-31 16:46:32,819 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 31 predicate places. [2024-01-31 16:46:32,820 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 421 flow [2024-01-31 16:46:32,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:32,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:32,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:32,831 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 16:46:33,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-31 16:46:33,028 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:33,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:33,028 INFO L85 PathProgramCache]: Analyzing trace with hash 589652670, now seen corresponding path program 2 times [2024-01-31 16:46:33,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:33,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633266312] [2024-01-31 16:46:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:33,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:33,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:33,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633266312] [2024-01-31 16:46:33,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633266312] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:33,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034009251] [2024-01-31 16:46:33,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 16:46:33,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:33,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:33,252 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 16:46:33,280 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 16:46:33,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 16:46:33,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:33,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:46:33,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:46:33,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:33,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034009251] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:33,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:33,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2024-01-31 16:46:33,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883678219] [2024-01-31 16:46:33,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:33,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:33,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-01-31 16:46:33,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:33,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 421 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 16:46:33,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:33,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:33,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:34,363 INFO L124 PetriNetUnfolderBase]: 7003/9674 cut-off events. [2024-01-31 16:46:34,363 INFO L125 PetriNetUnfolderBase]: For 15360/15360 co-relation queries the response was YES. [2024-01-31 16:46:34,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28011 conditions, 9674 events. 7003/9674 cut-off events. For 15360/15360 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 46972 event pairs, 1720 based on Foata normal form. 1/8651 useless extension candidates. Maximal degree in co-relation 27972. Up to 3740 conditions per place. [2024-01-31 16:46:34,411 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 142 selfloop transitions, 20 changer transitions 1/164 dead transitions. [2024-01-31 16:46:34,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 164 transitions, 1102 flow [2024-01-31 16:46:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:34,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:34,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-01-31 16:46:34,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-01-31 16:46:34,413 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 421 flow. Second operand 10 states and 181 transitions. [2024-01-31 16:46:34,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 164 transitions, 1102 flow [2024-01-31 16:46:34,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 164 transitions, 1083 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-01-31 16:46:34,447 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 535 flow [2024-01-31 16:46:34,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=535, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2024-01-31 16:46:34,448 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 40 predicate places. [2024-01-31 16:46:34,448 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 535 flow [2024-01-31 16:46:34,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 16:46:34,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:34,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:34,462 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 16:46:34,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 16:46:34,660 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:34,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:34,660 INFO L85 PathProgramCache]: Analyzing trace with hash -441475722, now seen corresponding path program 3 times [2024-01-31 16:46:34,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:34,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711906653] [2024-01-31 16:46:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:34,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:34,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711906653] [2024-01-31 16:46:34,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711906653] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437911799] [2024-01-31 16:46:34,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 16:46:34,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:34,921 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 16:46:34,923 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 16:46:35,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 16:46:35,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:35,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:46:35,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:46:35,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:35,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437911799] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:35,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:35,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-01-31 16:46:35,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427649048] [2024-01-31 16:46:35,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:35,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:35,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:35,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:46:35,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:35,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 535 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 16:46:35,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:35,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:35,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:36,270 INFO L124 PetriNetUnfolderBase]: 7649/10665 cut-off events. [2024-01-31 16:46:36,270 INFO L125 PetriNetUnfolderBase]: For 22846/22846 co-relation queries the response was YES. [2024-01-31 16:46:36,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31768 conditions, 10665 events. 7649/10665 cut-off events. For 22846/22846 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 53575 event pairs, 2012 based on Foata normal form. 1/9587 useless extension candidates. Maximal degree in co-relation 31727. Up to 3740 conditions per place. [2024-01-31 16:46:36,330 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 153 selfloop transitions, 26 changer transitions 1/181 dead transitions. [2024-01-31 16:46:36,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 181 transitions, 1331 flow [2024-01-31 16:46:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-01-31 16:46:36,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-01-31 16:46:36,332 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 535 flow. Second operand 10 states and 189 transitions. [2024-01-31 16:46:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 181 transitions, 1331 flow [2024-01-31 16:46:36,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 181 transitions, 1291 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-01-31 16:46:36,391 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 692 flow [2024-01-31 16:46:36,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=692, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2024-01-31 16:46:36,391 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 48 predicate places. [2024-01-31 16:46:36,391 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 692 flow [2024-01-31 16:46:36,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 16:46:36,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:36,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:36,405 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 16:46:36,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-31 16:46:36,602 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:36,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:36,603 INFO L85 PathProgramCache]: Analyzing trace with hash 227247490, now seen corresponding path program 4 times [2024-01-31 16:46:36,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:36,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927083708] [2024-01-31 16:46:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:36,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:37,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:37,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927083708] [2024-01-31 16:46:37,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927083708] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:37,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989570152] [2024-01-31 16:46:37,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 16:46:37,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:37,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:37,148 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 16:46:37,150 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 16:46:37,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 16:46:37,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:37,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:46:37,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:37,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:37,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989570152] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:37,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:37,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2024-01-31 16:46:37,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690466693] [2024-01-31 16:46:37,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:37,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:37,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:37,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:37,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:46:37,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:37,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 692 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:37,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:37,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:37,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:39,772 INFO L124 PetriNetUnfolderBase]: 17064/24443 cut-off events. [2024-01-31 16:46:39,772 INFO L125 PetriNetUnfolderBase]: For 54759/54759 co-relation queries the response was YES. [2024-01-31 16:46:39,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69934 conditions, 24443 events. 17064/24443 cut-off events. For 54759/54759 co-relation queries the response was YES. Maximal size of possible extension queue 934. Compared 147098 event pairs, 1536 based on Foata normal form. 2/21586 useless extension candidates. Maximal degree in co-relation 69889. Up to 7833 conditions per place. [2024-01-31 16:46:39,873 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 90 changer transitions 3/293 dead transitions. [2024-01-31 16:46:39,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 293 transitions, 2654 flow [2024-01-31 16:46:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:46:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:46:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-01-31 16:46:39,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2024-01-31 16:46:39,875 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 692 flow. Second operand 11 states and 234 transitions. [2024-01-31 16:46:39,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 293 transitions, 2654 flow [2024-01-31 16:46:40,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 293 transitions, 2548 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-01-31 16:46:40,023 INFO L231 Difference]: Finished difference. Result has 101 places, 156 transitions, 1869 flow [2024-01-31 16:46:40,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1869, PETRI_PLACES=101, PETRI_TRANSITIONS=156} [2024-01-31 16:46:40,024 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 62 predicate places. [2024-01-31 16:46:40,024 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 156 transitions, 1869 flow [2024-01-31 16:46:40,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:40,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:40,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:40,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-01-31 16:46:40,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 16:46:40,236 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:40,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2043186780, now seen corresponding path program 5 times [2024-01-31 16:46:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872442921] [2024-01-31 16:46:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:40,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:40,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872442921] [2024-01-31 16:46:40,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872442921] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784693520] [2024-01-31 16:46:40,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 16:46:40,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:40,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:40,446 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 16:46:40,468 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 16:46:40,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 16:46:40,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:40,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-31 16:46:40,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:40,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:40,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784693520] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:40,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:40,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 19 [2024-01-31 16:46:40,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952236454] [2024-01-31 16:46:40,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:40,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-31 16:46:40,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-31 16:46:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2024-01-31 16:46:40,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:40,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 156 transitions, 1869 flow. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:40,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:40,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:40,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:44,389 INFO L124 PetriNetUnfolderBase]: 30077/43382 cut-off events. [2024-01-31 16:46:44,390 INFO L125 PetriNetUnfolderBase]: For 132227/132227 co-relation queries the response was YES. [2024-01-31 16:46:44,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143636 conditions, 43382 events. 30077/43382 cut-off events. For 132227/132227 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 283963 event pairs, 4001 based on Foata normal form. 4/40661 useless extension candidates. Maximal degree in co-relation 143583. Up to 18175 conditions per place. [2024-01-31 16:46:44,892 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 219 selfloop transitions, 205 changer transitions 9/434 dead transitions. [2024-01-31 16:46:44,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 434 transitions, 5013 flow [2024-01-31 16:46:44,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:46:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:46:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-01-31 16:46:44,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-01-31 16:46:44,894 INFO L175 Difference]: Start difference. First operand has 101 places, 156 transitions, 1869 flow. Second operand 11 states and 242 transitions. [2024-01-31 16:46:44,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 434 transitions, 5013 flow [2024-01-31 16:46:46,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 434 transitions, 4847 flow, removed 83 selfloop flow, removed 0 redundant places. [2024-01-31 16:46:46,027 INFO L231 Difference]: Finished difference. Result has 120 places, 276 transitions, 4107 flow [2024-01-31 16:46:46,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1797, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4107, PETRI_PLACES=120, PETRI_TRANSITIONS=276} [2024-01-31 16:46:46,027 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 81 predicate places. [2024-01-31 16:46:46,028 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 276 transitions, 4107 flow [2024-01-31 16:46:46,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:46:46,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:46,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:46,041 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 16:46:46,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:46,240 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:46,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -404647614, now seen corresponding path program 6 times [2024-01-31 16:46:46,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:46,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098649134] [2024-01-31 16:46:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:46,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:46,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098649134] [2024-01-31 16:46:46,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098649134] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:46,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356271716] [2024-01-31 16:46:46,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 16:46:46,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:46,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:46,469 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 16:46:46,470 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 16:46:46,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-31 16:46:46,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 16:46:46,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-31 16:46:46,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:46:46,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 16:46:46,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356271716] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:46:46,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-31 16:46:46,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-01-31 16:46:46,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949511146] [2024-01-31 16:46:46,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:46,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 16:46:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 16:46:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-01-31 16:46:46,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:46,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 276 transitions, 4107 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 16:46:46,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:46,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:46,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:46:52,368 INFO L124 PetriNetUnfolderBase]: 31469/45320 cut-off events. [2024-01-31 16:46:52,368 INFO L125 PetriNetUnfolderBase]: For 204059/204059 co-relation queries the response was YES. [2024-01-31 16:46:52,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175126 conditions, 45320 events. 31469/45320 cut-off events. For 204059/204059 co-relation queries the response was YES. Maximal size of possible extension queue 1665. Compared 297724 event pairs, 9826 based on Foata normal form. 6/45325 useless extension candidates. Maximal degree in co-relation 175062. Up to 17462 conditions per place. [2024-01-31 16:46:52,851 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 356 selfloop transitions, 123 changer transitions 2/482 dead transitions. [2024-01-31 16:46:52,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 482 transitions, 6795 flow [2024-01-31 16:46:52,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 16:46:52,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 16:46:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-01-31 16:46:52,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-01-31 16:46:52,852 INFO L175 Difference]: Start difference. First operand has 120 places, 276 transitions, 4107 flow. Second operand 10 states and 186 transitions. [2024-01-31 16:46:52,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 482 transitions, 6795 flow [2024-01-31 16:46:54,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 482 transitions, 6686 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-01-31 16:46:54,048 INFO L231 Difference]: Finished difference. Result has 130 places, 299 transitions, 4840 flow [2024-01-31 16:46:54,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4840, PETRI_PLACES=130, PETRI_TRANSITIONS=299} [2024-01-31 16:46:54,049 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 91 predicate places. [2024-01-31 16:46:54,049 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 299 transitions, 4840 flow [2024-01-31 16:46:54,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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 16:46:54,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:46:54,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:46:54,061 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 16:46:54,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-01-31 16:46:54,253 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:46:54,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:46:54,254 INFO L85 PathProgramCache]: Analyzing trace with hash -655107274, now seen corresponding path program 7 times [2024-01-31 16:46:54,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:46:54,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198529332] [2024-01-31 16:46:54,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:46:54,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:46:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-31 16:46:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:46:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198529332] [2024-01-31 16:46:54,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198529332] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:54,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735921549] [2024-01-31 16:46:54,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 16:46:54,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:46:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 16:46:54,497 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 16:46:54,498 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 16:46:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:46:54,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 14 conjunts are in the unsatisfiable core [2024-01-31 16:46:54,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 16:46:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:54,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 16:46:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-31 16:46:55,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735921549] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-31 16:46:55,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-31 16:46:55,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 22 [2024-01-31 16:46:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759659120] [2024-01-31 16:46:55,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:46:55,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-31 16:46:55,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:46:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-31 16:46:55,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-01-31 16:46:55,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:46:55,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 299 transitions, 4840 flow. Second operand has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 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 16:46:55,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:46:55,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:46:55,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 16:47:00,712 INFO L124 PetriNetUnfolderBase]: 31469/45312 cut-off events. [2024-01-31 16:47:00,712 INFO L125 PetriNetUnfolderBase]: For 232583/232583 co-relation queries the response was YES. [2024-01-31 16:47:01,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178543 conditions, 45312 events. 31469/45312 cut-off events. For 232583/232583 co-relation queries the response was YES. Maximal size of possible extension queue 1653. Compared 296694 event pairs, 8488 based on Foata normal form. 4/45315 useless extension candidates. Maximal degree in co-relation 178476. Up to 17399 conditions per place. [2024-01-31 16:47:01,156 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 361 selfloop transitions, 140 changer transitions 2/504 dead transitions. [2024-01-31 16:47:01,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 504 transitions, 7419 flow [2024-01-31 16:47:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 16:47:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 16:47:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 197 transitions. [2024-01-31 16:47:01,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264069264069264 [2024-01-31 16:47:01,157 INFO L175 Difference]: Start difference. First operand has 130 places, 299 transitions, 4840 flow. Second operand 11 states and 197 transitions. [2024-01-31 16:47:01,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 504 transitions, 7419 flow [2024-01-31 16:47:02,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 504 transitions, 7290 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-01-31 16:47:02,315 INFO L231 Difference]: Finished difference. Result has 139 places, 337 transitions, 5887 flow [2024-01-31 16:47:02,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4720, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5887, PETRI_PLACES=139, PETRI_TRANSITIONS=337} [2024-01-31 16:47:02,315 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 100 predicate places. [2024-01-31 16:47:02,315 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 337 transitions, 5887 flow [2024-01-31 16:47:02,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.222222222222222) internal successors, (65), 9 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 16:47:02,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 16:47:02,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 16:47:02,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-01-31 16:47:02,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 16:47:02,527 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-01-31 16:47:02,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 16:47:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1313800348, now seen corresponding path program 1 times [2024-01-31 16:47:02,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 16:47:02,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222175415] [2024-01-31 16:47:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 16:47:02,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 16:47:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 16:47:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-31 16:47:02,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 16:47:02,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222175415] [2024-01-31 16:47:02,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222175415] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 16:47:02,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 16:47:02,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 16:47:02,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79980685] [2024-01-31 16:47:02,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 16:47:02,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 16:47:02,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 16:47:02,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 16:47:02,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-31 16:47:02,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 42 [2024-01-31 16:47:02,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 337 transitions, 5887 flow. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 16:47:02,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 16:47:02,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 42 [2024-01-31 16:47:02,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand