./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-flipped-dist.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-flipped-dist.wvr.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:12:44,628 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:12:44,685 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:12:44,689 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:12:44,690 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:12:44,711 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:12:44,712 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:12:44,712 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:12:44,713 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:12:44,716 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:12:44,716 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:12:44,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:12:44,717 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:12:44,718 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:12:44,718 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:12:44,718 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:12:44,718 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:12:44,719 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:12:44,719 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:12:44,719 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:12:44,719 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:12:44,720 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:12:44,720 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:12:44,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:12:44,720 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:12:44,720 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:12:44,721 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:12:44,721 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:12:44,721 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:12:44,721 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:12:44,722 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:12:44,722 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:12:44,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:12:44,723 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:12:44,723 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:12:44,723 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:12:44,723 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:12:44,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:12:44,723 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:12:44,724 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:12:44,724 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:12:44,724 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:12:44,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:12:44,724 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:12:44,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:12:45,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:12:45,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:12:45,021 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:12:45,022 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:12:45,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2024-02-07 19:12:46,012 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:12:46,194 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:12:46,194 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2024-02-07 19:12:46,200 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83869aac5/d4cb8536171144e293e53a14f2bd3870/FLAG3b65abe5c [2024-02-07 19:12:46,210 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83869aac5/d4cb8536171144e293e53a14f2bd3870 [2024-02-07 19:12:46,212 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:12:46,213 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:12:46,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/mult-flipped-dist.wvr.yml/witness.yml [2024-02-07 19:12:46,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:12:46,271 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:12:46,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:12:46,273 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:12:46,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:12:46,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:12:46" (1/2) ... [2024-02-07 19:12:46,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@619cd96c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:46, skipping insertion in model container [2024-02-07 19:12:46,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:12:46" (1/2) ... [2024-02-07 19:12:46,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5babdcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:12:46, skipping insertion in model container [2024-02-07 19:12:46,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:12:46" (2/2) ... [2024-02-07 19:12:46,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@619cd96c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46, skipping insertion in model container [2024-02-07 19:12:46,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:12:46" (2/2) ... [2024-02-07 19:12:46,280 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:12:46,295 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:12:46,296 INFO L76 edCorrectnessWitness]: Location invariant before [L69-L69] ((((0LL - (long long )a) + (long long )c >= 0LL) && ((long long )a + (long long )c >= 0LL)) && ((0LL - (long long )a) - (long long )c >= 0LL)) && ((long long )a - (long long )c >= 0LL) [2024-02-07 19:12:46,311 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:12:46,453 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2174,2187] [2024-02-07 19:12:46,457 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:12:46,469 INFO L206 MainTranslator]: Completed pre-run Start Parsing Local [2024-02-07 19:12:46,504 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2174,2187] [2024-02-07 19:12:46,505 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:12:46,515 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:12:46,516 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46 WrapperNode [2024-02-07 19:12:46,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:12:46,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:12:46,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:12:46,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:12:46,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,545 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2024-02-07 19:12:46,546 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:12:46,546 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:12:46,546 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:12:46,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:12:46,555 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,559 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,569 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-02-07 19:12:46,570 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,573 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,579 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:12:46,581 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:12:46,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:12:46,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:12:46,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (1/1) ... [2024-02-07 19:12:46,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:12:46,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:46,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:12:46,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:12:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:12:46,632 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:12:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:12:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:12:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:12:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-02-07 19:12:46,633 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-02-07 19:12:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:12:46,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:12:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:12:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-02-07 19:12:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:12:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:12:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:12:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:12:46,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-02-07 19:12:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:12:46,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:12:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:12:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:12:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:12:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-02-07 19:12:46,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:12:46,636 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:12:46,777 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:12:46,779 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:12:46,943 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:12:46,943 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:12:47,085 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:12:47,086 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-07 19:12:47,086 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:12:47 BoogieIcfgContainer [2024-02-07 19:12:47,086 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:12:47,089 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:12:47,089 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:12:47,092 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:12:47,092 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:12:46" (1/4) ... [2024-02-07 19:12:47,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b6fcf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:12:47, skipping insertion in model container [2024-02-07 19:12:47,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:12:46" (2/4) ... [2024-02-07 19:12:47,093 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b6fcf0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:12:47, skipping insertion in model container [2024-02-07 19:12:47,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:12:46" (3/4) ... [2024-02-07 19:12:47,094 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b6fcf0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:12:47, skipping insertion in model container [2024-02-07 19:12:47,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:12:47" (4/4) ... [2024-02-07 19:12:47,095 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2024-02-07 19:12:47,110 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:12:47,113 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-02-07 19:12:47,113 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:12:47,179 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-02-07 19:12:47,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 29 transitions, 79 flow [2024-02-07 19:12:47,253 INFO L124 PetriNetUnfolderBase]: 3/26 cut-off events. [2024-02-07 19:12:47,254 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-07 19:12:47,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 26 events. 3/26 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-02-07 19:12:47,257 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 29 transitions, 79 flow [2024-02-07 19:12:47,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 25 transitions, 68 flow [2024-02-07 19:12:47,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:12:47,284 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;@45b7e1aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:12:47,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-07 19:12:47,288 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:12:47,289 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2024-02-07 19:12:47,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:12:47,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:47,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-02-07 19:12:47,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:47,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:47,295 INFO L85 PathProgramCache]: Analyzing trace with hash 8941, now seen corresponding path program 1 times [2024-02-07 19:12:47,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:47,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501917908] [2024-02-07 19:12:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:47,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:47,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:47,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501917908] [2024-02-07 19:12:47,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501917908] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:47,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:47,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-02-07 19:12:47,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070175815] [2024-02-07 19:12:47,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:47,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:12:47,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:47,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:12:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:12:47,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-02-07 19:12:47,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:47,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:47,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-02-07 19:12:47,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:47,749 INFO L124 PetriNetUnfolderBase]: 220/327 cut-off events. [2024-02-07 19:12:47,749 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-02-07 19:12:47,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 697 conditions, 327 events. 220/327 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 774 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 326 conditions per place. [2024-02-07 19:12:47,755 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 21 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-02-07 19:12:47,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 112 flow [2024-02-07 19:12:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:12:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:12:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2024-02-07 19:12:47,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-02-07 19:12:47,766 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 68 flow. Second operand 3 states and 36 transitions. [2024-02-07 19:12:47,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 112 flow [2024-02-07 19:12:47,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 19:12:47,771 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 58 flow [2024-02-07 19:12:47,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-02-07 19:12:47,776 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2024-02-07 19:12:47,776 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 58 flow [2024-02-07 19:12:47,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:47,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:47,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:47,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:12:47,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:47,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1872103532, now seen corresponding path program 1 times [2024-02-07 19:12:47,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:47,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967098237] [2024-02-07 19:12:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:47,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:48,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:48,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967098237] [2024-02-07 19:12:48,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967098237] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:48,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:48,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:12:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137626902] [2024-02-07 19:12:48,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:48,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:12:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:12:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:12:48,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:48,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:48,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:48,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:48,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:48,299 INFO L124 PetriNetUnfolderBase]: 428/632 cut-off events. [2024-02-07 19:12:48,299 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-02-07 19:12:48,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 632 events. 428/632 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1992 event pairs, 138 based on Foata normal form. 1/469 useless extension candidates. Maximal degree in co-relation 1282. Up to 389 conditions per place. [2024-02-07 19:12:48,306 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 37 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2024-02-07 19:12:48,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 43 transitions, 185 flow [2024-02-07 19:12:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:12:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:12:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-02-07 19:12:48,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-02-07 19:12:48,310 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 58 flow. Second operand 3 states and 58 transitions. [2024-02-07 19:12:48,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 43 transitions, 185 flow [2024-02-07 19:12:48,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:48,316 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 80 flow [2024-02-07 19:12:48,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2024-02-07 19:12:48,317 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -4 predicate places. [2024-02-07 19:12:48,321 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 80 flow [2024-02-07 19:12:48,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:48,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:48,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:48,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:12:48,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:48,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:48,322 INFO L85 PathProgramCache]: Analyzing trace with hash -895850470, now seen corresponding path program 1 times [2024-02-07 19:12:48,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:48,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881549641] [2024-02-07 19:12:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:48,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:48,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:48,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881549641] [2024-02-07 19:12:48,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881549641] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:48,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:48,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:12:48,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100835255] [2024-02-07 19:12:48,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:12:48,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:48,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:12:48,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:12:48,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:48,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 80 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) [2024-02-07 19:12:48,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:48,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:48,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:48,640 INFO L124 PetriNetUnfolderBase]: 562/810 cut-off events. [2024-02-07 19:12:48,641 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2024-02-07 19:12:48,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 810 events. 562/810 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2672 event pairs, 231 based on Foata normal form. 16/826 useless extension candidates. Maximal degree in co-relation 583. Up to 603 conditions per place. [2024-02-07 19:12:48,646 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 48 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2024-02-07 19:12:48,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 61 transitions, 299 flow [2024-02-07 19:12:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:12:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:12:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-02-07 19:12:48,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2024-02-07 19:12:48,649 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 80 flow. Second operand 5 states and 79 transitions. [2024-02-07 19:12:48,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 61 transitions, 299 flow [2024-02-07 19:12:48,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 61 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:48,652 INFO L231 Difference]: Finished difference. Result has 34 places, 37 transitions, 162 flow [2024-02-07 19:12:48,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=34, PETRI_TRANSITIONS=37} [2024-02-07 19:12:48,653 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2024-02-07 19:12:48,653 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 37 transitions, 162 flow [2024-02-07 19:12:48,654 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) [2024-02-07 19:12:48,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:48,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:48,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:12:48,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:48,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:48,655 INFO L85 PathProgramCache]: Analyzing trace with hash 998599555, now seen corresponding path program 1 times [2024-02-07 19:12:48,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:48,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762327166] [2024-02-07 19:12:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:48,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:48,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:48,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762327166] [2024-02-07 19:12:48,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762327166] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:48,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:48,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:12:48,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081471980] [2024-02-07 19:12:48,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:48,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:12:48,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:12:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:12:48,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:48,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 37 transitions, 162 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) [2024-02-07 19:12:48,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:48,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:48,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:48,929 INFO L124 PetriNetUnfolderBase]: 601/916 cut-off events. [2024-02-07 19:12:48,930 INFO L125 PetriNetUnfolderBase]: For 852/852 co-relation queries the response was YES. [2024-02-07 19:12:48,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 916 events. 601/916 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3572 event pairs, 158 based on Foata normal form. 86/1002 useless extension candidates. Maximal degree in co-relation 2190. Up to 406 conditions per place. [2024-02-07 19:12:48,934 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 54 selfloop transitions, 12 changer transitions 5/72 dead transitions. [2024-02-07 19:12:48,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 72 transitions, 409 flow [2024-02-07 19:12:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:12:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:12:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-02-07 19:12:48,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068965517241379 [2024-02-07 19:12:48,936 INFO L175 Difference]: Start difference. First operand has 34 places, 37 transitions, 162 flow. Second operand 5 states and 88 transitions. [2024-02-07 19:12:48,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 72 transitions, 409 flow [2024-02-07 19:12:48,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 72 transitions, 397 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-02-07 19:12:48,939 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 211 flow [2024-02-07 19:12:48,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-02-07 19:12:48,940 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2024-02-07 19:12:48,940 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 211 flow [2024-02-07 19:12:48,940 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) [2024-02-07 19:12:48,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:48,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:48,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:12:48,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:48,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash 863250367, now seen corresponding path program 2 times [2024-02-07 19:12:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:48,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047898160] [2024-02-07 19:12:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:49,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:49,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047898160] [2024-02-07 19:12:49,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047898160] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:49,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:49,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:12:49,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194815698] [2024-02-07 19:12:49,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:49,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:12:49,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:49,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:12:49,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:12:49,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:49,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:49,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:49,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:49,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:49,137 INFO L124 PetriNetUnfolderBase]: 671/1024 cut-off events. [2024-02-07 19:12:49,137 INFO L125 PetriNetUnfolderBase]: For 2332/2332 co-relation queries the response was YES. [2024-02-07 19:12:49,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3732 conditions, 1024 events. 671/1024 cut-off events. For 2332/2332 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3908 event pairs, 179 based on Foata normal form. 38/1062 useless extension candidates. Maximal degree in co-relation 2733. Up to 586 conditions per place. [2024-02-07 19:12:49,144 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 55 selfloop transitions, 7 changer transitions 12/75 dead transitions. [2024-02-07 19:12:49,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 75 transitions, 535 flow [2024-02-07 19:12:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:12:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:12:49,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 75 transitions. [2024-02-07 19:12:49,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646551724137931 [2024-02-07 19:12:49,146 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 211 flow. Second operand 4 states and 75 transitions. [2024-02-07 19:12:49,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 75 transitions, 535 flow [2024-02-07 19:12:49,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 75 transitions, 502 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:49,150 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 233 flow [2024-02-07 19:12:49,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-02-07 19:12:49,151 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2024-02-07 19:12:49,151 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 233 flow [2024-02-07 19:12:49,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:49,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:49,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:49,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:12:49,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:49,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:49,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1604458324, now seen corresponding path program 2 times [2024-02-07 19:12:49,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:49,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940225217] [2024-02-07 19:12:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:49,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:49,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:49,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940225217] [2024-02-07 19:12:49,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940225217] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:49,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:49,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:12:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249575461] [2024-02-07 19:12:49,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:49,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:12:49,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:12:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:12:49,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:49,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 233 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) [2024-02-07 19:12:49,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:49,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:49,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:49,388 INFO L124 PetriNetUnfolderBase]: 818/1227 cut-off events. [2024-02-07 19:12:49,388 INFO L125 PetriNetUnfolderBase]: For 3432/3432 co-relation queries the response was YES. [2024-02-07 19:12:49,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 1227 events. 818/1227 cut-off events. For 3432/3432 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4868 event pairs, 310 based on Foata normal form. 16/1243 useless extension candidates. Maximal degree in co-relation 3447. Up to 894 conditions per place. [2024-02-07 19:12:49,395 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 54 selfloop transitions, 18 changer transitions 3/76 dead transitions. [2024-02-07 19:12:49,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 76 transitions, 590 flow [2024-02-07 19:12:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:12:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:12:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 79 transitions. [2024-02-07 19:12:49,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2024-02-07 19:12:49,396 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 233 flow. Second operand 5 states and 79 transitions. [2024-02-07 19:12:49,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 76 transitions, 590 flow [2024-02-07 19:12:49,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 76 transitions, 573 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:49,403 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 378 flow [2024-02-07 19:12:49,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2024-02-07 19:12:49,403 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 17 predicate places. [2024-02-07 19:12:49,404 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 378 flow [2024-02-07 19:12:49,404 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) [2024-02-07 19:12:49,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:49,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:49,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:12:49,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:49,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:49,405 INFO L85 PathProgramCache]: Analyzing trace with hash 787183843, now seen corresponding path program 3 times [2024-02-07 19:12:49,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:49,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655710400] [2024-02-07 19:12:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:49,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:49,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:49,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655710400] [2024-02-07 19:12:49,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655710400] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:49,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:49,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:12:49,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760309979] [2024-02-07 19:12:49,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:49,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:12:49,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:49,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:12:49,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:12:49,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:49,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 378 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:49,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:49,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:49,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:49,619 INFO L124 PetriNetUnfolderBase]: 904/1353 cut-off events. [2024-02-07 19:12:49,619 INFO L125 PetriNetUnfolderBase]: For 5124/5124 co-relation queries the response was YES. [2024-02-07 19:12:49,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6211 conditions, 1353 events. 904/1353 cut-off events. For 5124/5124 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5397 event pairs, 248 based on Foata normal form. 40/1393 useless extension candidates. Maximal degree in co-relation 4503. Up to 894 conditions per place. [2024-02-07 19:12:49,628 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 64 selfloop transitions, 12 changer transitions 16/93 dead transitions. [2024-02-07 19:12:49,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 93 transitions, 849 flow [2024-02-07 19:12:49,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:12:49,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:12:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-02-07 19:12:49,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6293103448275862 [2024-02-07 19:12:49,630 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 378 flow. Second operand 4 states and 73 transitions. [2024-02-07 19:12:49,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 93 transitions, 849 flow [2024-02-07 19:12:49,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 93 transitions, 819 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-02-07 19:12:49,637 INFO L231 Difference]: Finished difference. Result has 54 places, 56 transitions, 460 flow [2024-02-07 19:12:49,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=460, PETRI_PLACES=54, PETRI_TRANSITIONS=56} [2024-02-07 19:12:49,638 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-02-07 19:12:49,638 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 56 transitions, 460 flow [2024-02-07 19:12:49,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:49,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:49,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:49,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:12:49,639 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:49,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:49,639 INFO L85 PathProgramCache]: Analyzing trace with hash 17252314, now seen corresponding path program 3 times [2024-02-07 19:12:49,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:49,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165197008] [2024-02-07 19:12:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:49,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:49,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:49,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165197008] [2024-02-07 19:12:49,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165197008] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:49,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:49,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:12:49,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226529162] [2024-02-07 19:12:49,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:49,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:12:49,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:49,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:12:49,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:12:49,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:49,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 460 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) [2024-02-07 19:12:49,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:49,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:49,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:49,983 INFO L124 PetriNetUnfolderBase]: 918/1429 cut-off events. [2024-02-07 19:12:49,983 INFO L125 PetriNetUnfolderBase]: For 6176/6176 co-relation queries the response was YES. [2024-02-07 19:12:49,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6470 conditions, 1429 events. 918/1429 cut-off events. For 6176/6176 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6298 event pairs, 272 based on Foata normal form. 46/1475 useless extension candidates. Maximal degree in co-relation 4743. Up to 770 conditions per place. [2024-02-07 19:12:49,992 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 62 selfloop transitions, 15 changer transitions 12/90 dead transitions. [2024-02-07 19:12:49,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 90 transitions, 803 flow [2024-02-07 19:12:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:12:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:12:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-02-07 19:12:49,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793103448275863 [2024-02-07 19:12:49,994 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 460 flow. Second operand 5 states and 84 transitions. [2024-02-07 19:12:49,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 90 transitions, 803 flow [2024-02-07 19:12:50,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 90 transitions, 795 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:50,004 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 511 flow [2024-02-07 19:12:50,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=511, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-02-07 19:12:50,005 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2024-02-07 19:12:50,005 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 511 flow [2024-02-07 19:12:50,005 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) [2024-02-07 19:12:50,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:50,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:50,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:12:50,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:50,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:50,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1316378133, now seen corresponding path program 4 times [2024-02-07 19:12:50,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:50,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330711586] [2024-02-07 19:12:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:50,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330711586] [2024-02-07 19:12:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330711586] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:50,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:50,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:12:50,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127508861] [2024-02-07 19:12:50,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:50,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:12:50,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:12:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:12:50,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:50,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 511 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:50,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:50,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:50,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:50,210 INFO L124 PetriNetUnfolderBase]: 879/1332 cut-off events. [2024-02-07 19:12:50,211 INFO L125 PetriNetUnfolderBase]: For 8294/8294 co-relation queries the response was YES. [2024-02-07 19:12:50,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6832 conditions, 1332 events. 879/1332 cut-off events. For 8294/8294 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5402 event pairs, 332 based on Foata normal form. 40/1372 useless extension candidates. Maximal degree in co-relation 4913. Up to 910 conditions per place. [2024-02-07 19:12:50,220 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 50 selfloop transitions, 24 changer transitions 11/86 dead transitions. [2024-02-07 19:12:50,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 86 transitions, 929 flow [2024-02-07 19:12:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:12:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:12:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-02-07 19:12:50,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775862068965517 [2024-02-07 19:12:50,221 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 511 flow. Second operand 4 states and 67 transitions. [2024-02-07 19:12:50,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 86 transitions, 929 flow [2024-02-07 19:12:50,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 866 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-02-07 19:12:50,232 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 564 flow [2024-02-07 19:12:50,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=564, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-02-07 19:12:50,233 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 26 predicate places. [2024-02-07 19:12:50,233 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 564 flow [2024-02-07 19:12:50,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:50,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:50,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:50,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:12:50,234 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:50,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:50,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1968253266, now seen corresponding path program 4 times [2024-02-07 19:12:50,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:50,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010802780] [2024-02-07 19:12:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:50,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:50,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:50,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010802780] [2024-02-07 19:12:50,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010802780] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:50,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:50,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:12:50,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143333861] [2024-02-07 19:12:50,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:50,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:12:50,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:50,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:12:50,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:12:50,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:50,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 564 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:50,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:50,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:50,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:50,438 INFO L124 PetriNetUnfolderBase]: 833/1225 cut-off events. [2024-02-07 19:12:50,438 INFO L125 PetriNetUnfolderBase]: For 7918/7918 co-relation queries the response was YES. [2024-02-07 19:12:50,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6623 conditions, 1225 events. 833/1225 cut-off events. For 7918/7918 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4629 event pairs, 161 based on Foata normal form. 32/1257 useless extension candidates. Maximal degree in co-relation 4473. Up to 952 conditions per place. [2024-02-07 19:12:50,449 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 68 selfloop transitions, 15 changer transitions 1/85 dead transitions. [2024-02-07 19:12:50,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 85 transitions, 958 flow [2024-02-07 19:12:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:12:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:12:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-02-07 19:12:50,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5948275862068966 [2024-02-07 19:12:50,451 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 564 flow. Second operand 4 states and 69 transitions. [2024-02-07 19:12:50,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 85 transitions, 958 flow [2024-02-07 19:12:50,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 85 transitions, 884 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-02-07 19:12:50,460 INFO L231 Difference]: Finished difference. Result has 56 places, 62 transitions, 631 flow [2024-02-07 19:12:50,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=631, PETRI_PLACES=56, PETRI_TRANSITIONS=62} [2024-02-07 19:12:50,460 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2024-02-07 19:12:50,460 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 62 transitions, 631 flow [2024-02-07 19:12:50,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:50,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:50,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:50,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 19:12:50,461 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:50,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1033237266, now seen corresponding path program 5 times [2024-02-07 19:12:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:50,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484318985] [2024-02-07 19:12:50,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:50,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:50,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484318985] [2024-02-07 19:12:50,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484318985] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:50,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:50,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:12:50,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301052876] [2024-02-07 19:12:50,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:50,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:12:50,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:12:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:12:50,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:50,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 62 transitions, 631 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) [2024-02-07 19:12:50,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:50,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:50,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:50,678 INFO L124 PetriNetUnfolderBase]: 887/1307 cut-off events. [2024-02-07 19:12:50,678 INFO L125 PetriNetUnfolderBase]: For 9062/9062 co-relation queries the response was YES. [2024-02-07 19:12:50,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7064 conditions, 1307 events. 887/1307 cut-off events. For 9062/9062 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4975 event pairs, 280 based on Foata normal form. 16/1323 useless extension candidates. Maximal degree in co-relation 4916. Up to 869 conditions per place. [2024-02-07 19:12:50,686 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 62 selfloop transitions, 28 changer transitions 4/95 dead transitions. [2024-02-07 19:12:50,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 95 transitions, 1130 flow [2024-02-07 19:12:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:12:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:12:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-02-07 19:12:50,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496551724137931 [2024-02-07 19:12:50,688 INFO L175 Difference]: Start difference. First operand has 56 places, 62 transitions, 631 flow. Second operand 5 states and 72 transitions. [2024-02-07 19:12:50,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 95 transitions, 1130 flow [2024-02-07 19:12:50,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 95 transitions, 1116 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:50,694 INFO L231 Difference]: Finished difference. Result has 62 places, 74 transitions, 877 flow [2024-02-07 19:12:50,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=877, PETRI_PLACES=62, PETRI_TRANSITIONS=74} [2024-02-07 19:12:50,695 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 30 predicate places. [2024-02-07 19:12:50,695 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 74 transitions, 877 flow [2024-02-07 19:12:50,695 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) [2024-02-07 19:12:50,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:50,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:50,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 19:12:50,696 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:50,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1123281814, now seen corresponding path program 6 times [2024-02-07 19:12:50,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:50,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68687932] [2024-02-07 19:12:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:50,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:50,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:50,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68687932] [2024-02-07 19:12:50,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68687932] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:50,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:50,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-02-07 19:12:50,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672339221] [2024-02-07 19:12:50,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:50,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:12:50,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:50,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:12:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:12:50,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:50,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 74 transitions, 877 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:50,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:50,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:50,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:50,892 INFO L124 PetriNetUnfolderBase]: 932/1343 cut-off events. [2024-02-07 19:12:50,892 INFO L125 PetriNetUnfolderBase]: For 11484/11484 co-relation queries the response was YES. [2024-02-07 19:12:50,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8324 conditions, 1343 events. 932/1343 cut-off events. For 11484/11484 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5050 event pairs, 243 based on Foata normal form. 32/1375 useless extension candidates. Maximal degree in co-relation 7149. Up to 872 conditions per place. [2024-02-07 19:12:50,902 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 74 selfloop transitions, 34 changer transitions 1/110 dead transitions. [2024-02-07 19:12:50,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 110 transitions, 1429 flow [2024-02-07 19:12:50,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:12:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:12:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-02-07 19:12:50,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5948275862068966 [2024-02-07 19:12:50,903 INFO L175 Difference]: Start difference. First operand has 62 places, 74 transitions, 877 flow. Second operand 4 states and 69 transitions. [2024-02-07 19:12:50,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 110 transitions, 1429 flow [2024-02-07 19:12:50,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 110 transitions, 1387 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:50,914 INFO L231 Difference]: Finished difference. Result has 63 places, 86 transitions, 1129 flow [2024-02-07 19:12:50,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1129, PETRI_PLACES=63, PETRI_TRANSITIONS=86} [2024-02-07 19:12:50,914 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 31 predicate places. [2024-02-07 19:12:50,914 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 86 transitions, 1129 flow [2024-02-07 19:12:50,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:50,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:50,915 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] [2024-02-07 19:12:50,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 19:12:50,915 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:50,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:50,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2028096481, now seen corresponding path program 1 times [2024-02-07 19:12:50,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:50,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190361203] [2024-02-07 19:12:50,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:50,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:12:50,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:50,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190361203] [2024-02-07 19:12:50,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190361203] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:50,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611230438] [2024-02-07 19:12:50,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:50,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:50,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:51,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:51,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-07 19:12:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:51,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2024-02-07 19:12:51,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:12:51,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-02-07 19:12:51,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611230438] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:51,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-02-07 19:12:51,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-02-07 19:12:51,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989075460] [2024-02-07 19:12:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:51,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:12:51,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:12:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:12:51,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:51,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 86 transitions, 1129 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) [2024-02-07 19:12:51,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:51,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:51,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:51,358 INFO L124 PetriNetUnfolderBase]: 1175/1686 cut-off events. [2024-02-07 19:12:51,359 INFO L125 PetriNetUnfolderBase]: For 16115/16115 co-relation queries the response was YES. [2024-02-07 19:12:51,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11085 conditions, 1686 events. 1175/1686 cut-off events. For 16115/16115 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6563 event pairs, 281 based on Foata normal form. 54/1740 useless extension candidates. Maximal degree in co-relation 7804. Up to 1173 conditions per place. [2024-02-07 19:12:51,371 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 95 selfloop transitions, 46 changer transitions 0/142 dead transitions. [2024-02-07 19:12:51,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 142 transitions, 2088 flow [2024-02-07 19:12:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:12:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:12:51,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-02-07 19:12:51,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103448275862069 [2024-02-07 19:12:51,373 INFO L175 Difference]: Start difference. First operand has 63 places, 86 transitions, 1129 flow. Second operand 5 states and 74 transitions. [2024-02-07 19:12:51,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 142 transitions, 2088 flow [2024-02-07 19:12:51,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 142 transitions, 1982 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-02-07 19:12:51,388 INFO L231 Difference]: Finished difference. Result has 68 places, 110 transitions, 1608 flow [2024-02-07 19:12:51,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1608, PETRI_PLACES=68, PETRI_TRANSITIONS=110} [2024-02-07 19:12:51,389 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2024-02-07 19:12:51,389 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 110 transitions, 1608 flow [2024-02-07 19:12:51,389 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) [2024-02-07 19:12:51,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:51,389 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] [2024-02-07 19:12:51,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-02-07 19:12:51,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-02-07 19:12:51,603 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:51,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:51,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1015403387, now seen corresponding path program 2 times [2024-02-07 19:12:51,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:51,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900679592] [2024-02-07 19:12:51,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:51,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:12:51,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:51,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900679592] [2024-02-07 19:12:51,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900679592] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:12:51,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:12:51,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-02-07 19:12:51,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081680758] [2024-02-07 19:12:51,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:12:51,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-02-07 19:12:51,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-02-07 19:12:51,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-02-07 19:12:51,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:51,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 110 transitions, 1608 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) [2024-02-07 19:12:51,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:51,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:51,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:51,945 INFO L124 PetriNetUnfolderBase]: 1162/1679 cut-off events. [2024-02-07 19:12:51,945 INFO L125 PetriNetUnfolderBase]: For 19291/19291 co-relation queries the response was YES. [2024-02-07 19:12:51,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11769 conditions, 1679 events. 1162/1679 cut-off events. For 19291/19291 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6553 event pairs, 316 based on Foata normal form. 22/1701 useless extension candidates. Maximal degree in co-relation 8270. Up to 1138 conditions per place. [2024-02-07 19:12:51,956 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 106 selfloop transitions, 25 changer transitions 8/140 dead transitions. [2024-02-07 19:12:51,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 140 transitions, 2211 flow [2024-02-07 19:12:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-02-07 19:12:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-02-07 19:12:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-02-07 19:12:51,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2024-02-07 19:12:51,958 INFO L175 Difference]: Start difference. First operand has 68 places, 110 transitions, 1608 flow. Second operand 5 states and 70 transitions. [2024-02-07 19:12:51,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 140 transitions, 2211 flow [2024-02-07 19:12:51,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 140 transitions, 2169 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:51,976 INFO L231 Difference]: Finished difference. Result has 72 places, 109 transitions, 1636 flow [2024-02-07 19:12:51,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1636, PETRI_PLACES=72, PETRI_TRANSITIONS=109} [2024-02-07 19:12:51,977 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2024-02-07 19:12:51,977 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 109 transitions, 1636 flow [2024-02-07 19:12:51,978 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) [2024-02-07 19:12:51,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:51,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:12:51,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 19:12:51,978 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:51,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:51,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1330922009, now seen corresponding path program 1 times [2024-02-07 19:12:51,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:51,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239244720] [2024-02-07 19:12:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:51,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:52,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:52,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239244720] [2024-02-07 19:12:52,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239244720] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:52,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260221298] [2024-02-07 19:12:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:52,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:52,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:52,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:52,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-07 19:12:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:52,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:12:52,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:52,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:52,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260221298] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:52,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:52,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-02-07 19:12:52,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861962775] [2024-02-07 19:12:52,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:52,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:12:52,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:52,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:12:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:52,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:52,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 109 transitions, 1636 flow. Second operand has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:52,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:52,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:52,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:53,368 INFO L124 PetriNetUnfolderBase]: 1680/2435 cut-off events. [2024-02-07 19:12:53,368 INFO L125 PetriNetUnfolderBase]: For 26314/26314 co-relation queries the response was YES. [2024-02-07 19:12:53,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16418 conditions, 2435 events. 1680/2435 cut-off events. For 26314/26314 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10018 event pairs, 210 based on Foata normal form. 2/2437 useless extension candidates. Maximal degree in co-relation 11683. Up to 1761 conditions per place. [2024-02-07 19:12:53,389 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 146 selfloop transitions, 54 changer transitions 2/203 dead transitions. [2024-02-07 19:12:53,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 203 transitions, 2777 flow [2024-02-07 19:12:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:12:53,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:12:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-02-07 19:12:53,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5586206896551724 [2024-02-07 19:12:53,391 INFO L175 Difference]: Start difference. First operand has 72 places, 109 transitions, 1636 flow. Second operand 10 states and 162 transitions. [2024-02-07 19:12:53,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 203 transitions, 2777 flow [2024-02-07 19:12:53,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 203 transitions, 2689 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-02-07 19:12:53,415 INFO L231 Difference]: Finished difference. Result has 80 places, 140 transitions, 2232 flow [2024-02-07 19:12:53,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2232, PETRI_PLACES=80, PETRI_TRANSITIONS=140} [2024-02-07 19:12:53,416 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 48 predicate places. [2024-02-07 19:12:53,416 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 140 transitions, 2232 flow [2024-02-07 19:12:53,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:53,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:53,417 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] [2024-02-07 19:12:53,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-02-07 19:12:53,628 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,SelfDestructingSolverStorable14 [2024-02-07 19:12:53,628 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:53,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:53,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2867399, now seen corresponding path program 2 times [2024-02-07 19:12:53,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:53,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205280841] [2024-02-07 19:12:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:53,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:53,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205280841] [2024-02-07 19:12:53,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205280841] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551064778] [2024-02-07 19:12:53,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:12:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:53,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:53,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-07 19:12:53,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:53,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:53,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:12:53,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:54,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:54,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551064778] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:54,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:54,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-02-07 19:12:54,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53557750] [2024-02-07 19:12:54,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:54,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:12:54,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:54,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:12:54,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:54,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:54,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 140 transitions, 2232 flow. Second operand has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:54,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:54,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:54,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:54,909 INFO L124 PetriNetUnfolderBase]: 2032/2955 cut-off events. [2024-02-07 19:12:54,910 INFO L125 PetriNetUnfolderBase]: For 34770/34770 co-relation queries the response was YES. [2024-02-07 19:12:54,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20409 conditions, 2955 events. 2032/2955 cut-off events. For 34770/34770 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12535 event pairs, 364 based on Foata normal form. 2/2957 useless extension candidates. Maximal degree in co-relation 19614. Up to 2319 conditions per place. [2024-02-07 19:12:54,927 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 161 selfloop transitions, 54 changer transitions 2/218 dead transitions. [2024-02-07 19:12:54,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 218 transitions, 3237 flow [2024-02-07 19:12:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:12:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:12:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-02-07 19:12:54,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2024-02-07 19:12:54,929 INFO L175 Difference]: Start difference. First operand has 80 places, 140 transitions, 2232 flow. Second operand 10 states and 158 transitions. [2024-02-07 19:12:54,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 218 transitions, 3237 flow [2024-02-07 19:12:54,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 218 transitions, 2997 flow, removed 108 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:54,969 INFO L231 Difference]: Finished difference. Result has 90 places, 159 transitions, 2466 flow [2024-02-07 19:12:54,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2466, PETRI_PLACES=90, PETRI_TRANSITIONS=159} [2024-02-07 19:12:54,970 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 58 predicate places. [2024-02-07 19:12:54,970 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 159 transitions, 2466 flow [2024-02-07 19:12:54,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:54,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:54,971 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] [2024-02-07 19:12:54,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-02-07 19:12:55,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:55,182 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:55,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:55,182 INFO L85 PathProgramCache]: Analyzing trace with hash 2030836959, now seen corresponding path program 3 times [2024-02-07 19:12:55,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:55,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840496662] [2024-02-07 19:12:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:55,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:55,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:55,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840496662] [2024-02-07 19:12:55,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840496662] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:55,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216999670] [2024-02-07 19:12:55,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:12:55,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:55,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:55,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:55,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-07 19:12:55,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-02-07 19:12:55,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:55,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:12:55,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:55,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:55,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216999670] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:55,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:55,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 10 [2024-02-07 19:12:55,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162761914] [2024-02-07 19:12:55,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:55,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-02-07 19:12:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-02-07 19:12:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-02-07 19:12:55,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:55,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 159 transitions, 2466 flow. Second operand has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:55,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:55,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:55,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:56,394 INFO L124 PetriNetUnfolderBase]: 2542/3705 cut-off events. [2024-02-07 19:12:56,394 INFO L125 PetriNetUnfolderBase]: For 43202/43202 co-relation queries the response was YES. [2024-02-07 19:12:56,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25015 conditions, 3705 events. 2542/3705 cut-off events. For 43202/43202 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16442 event pairs, 562 based on Foata normal form. 2/3707 useless extension candidates. Maximal degree in co-relation 24392. Up to 3059 conditions per place. [2024-02-07 19:12:56,417 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 193 selfloop transitions, 59 changer transitions 2/255 dead transitions. [2024-02-07 19:12:56,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 255 transitions, 3881 flow [2024-02-07 19:12:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:12:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:12:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-02-07 19:12:56,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448275862068965 [2024-02-07 19:12:56,419 INFO L175 Difference]: Start difference. First operand has 90 places, 159 transitions, 2466 flow. Second operand 10 states and 158 transitions. [2024-02-07 19:12:56,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 255 transitions, 3881 flow [2024-02-07 19:12:56,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 255 transitions, 3676 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-02-07 19:12:56,466 INFO L231 Difference]: Finished difference. Result has 99 places, 195 transitions, 3117 flow [2024-02-07 19:12:56,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3117, PETRI_PLACES=99, PETRI_TRANSITIONS=195} [2024-02-07 19:12:56,467 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 67 predicate places. [2024-02-07 19:12:56,467 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 195 transitions, 3117 flow [2024-02-07 19:12:56,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:56,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:56,467 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] [2024-02-07 19:12:56,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:56,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-02-07 19:12:56,679 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:56,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash -583633697, now seen corresponding path program 4 times [2024-02-07 19:12:56,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:56,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743286865] [2024-02-07 19:12:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:56,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:56,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:56,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743286865] [2024-02-07 19:12:56,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743286865] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:56,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587767130] [2024-02-07 19:12:56,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:12:56,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:56,838 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:56,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-07 19:12:56,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:12:56,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:56,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:12:56,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:57,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:57,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587767130] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:57,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:57,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-02-07 19:12:57,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932151957] [2024-02-07 19:12:57,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:57,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:12:57,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:57,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:12:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:12:57,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:57,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 195 transitions, 3117 flow. Second operand has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:57,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:57,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:57,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:12:57,954 INFO L124 PetriNetUnfolderBase]: 2862/4177 cut-off events. [2024-02-07 19:12:57,954 INFO L125 PetriNetUnfolderBase]: For 50491/50491 co-relation queries the response was YES. [2024-02-07 19:12:57,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28474 conditions, 4177 events. 2862/4177 cut-off events. For 50491/50491 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19043 event pairs, 706 based on Foata normal form. 2/4179 useless extension candidates. Maximal degree in co-relation 27841. Up to 3609 conditions per place. [2024-02-07 19:12:57,981 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 206 selfloop transitions, 59 changer transitions 2/268 dead transitions. [2024-02-07 19:12:57,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 268 transitions, 4297 flow [2024-02-07 19:12:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:12:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:12:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-02-07 19:12:57,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241379310344828 [2024-02-07 19:12:57,983 INFO L175 Difference]: Start difference. First operand has 99 places, 195 transitions, 3117 flow. Second operand 10 states and 152 transitions. [2024-02-07 19:12:57,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 268 transitions, 4297 flow [2024-02-07 19:12:58,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 268 transitions, 3985 flow, removed 144 selfloop flow, removed 2 redundant places. [2024-02-07 19:12:58,040 INFO L231 Difference]: Finished difference. Result has 109 places, 214 transitions, 3346 flow [2024-02-07 19:12:58,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2805, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3346, PETRI_PLACES=109, PETRI_TRANSITIONS=214} [2024-02-07 19:12:58,041 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 77 predicate places. [2024-02-07 19:12:58,041 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 214 transitions, 3346 flow [2024-02-07 19:12:58,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:58,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:12:58,042 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] [2024-02-07 19:12:58,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-07 19:12:58,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-02-07 19:12:58,257 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:12:58,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:12:58,258 INFO L85 PathProgramCache]: Analyzing trace with hash -728879869, now seen corresponding path program 5 times [2024-02-07 19:12:58,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:12:58,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847839053] [2024-02-07 19:12:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:12:58,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:12:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:12:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:58,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:12:58,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847839053] [2024-02-07 19:12:58,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847839053] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:12:58,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668317115] [2024-02-07 19:12:58,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:12:58,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:12:58,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:12:58,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:12:58,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-07 19:12:58,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:12:58,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:12:58,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:12:58,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:12:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:58,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:12:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:12:59,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668317115] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:12:59,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:12:59,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2024-02-07 19:12:59,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629493111] [2024-02-07 19:12:59,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:12:59,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:12:59,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:12:59,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:12:59,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:12:59,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:12:59,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 214 transitions, 3346 flow. Second operand has 12 states, 12 states have (on average 9.833333333333334) internal successors, (118), 12 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:12:59,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:12:59,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:12:59,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:00,036 INFO L124 PetriNetUnfolderBase]: 3324/4851 cut-off events. [2024-02-07 19:13:00,036 INFO L125 PetriNetUnfolderBase]: For 57268/57268 co-relation queries the response was YES. [2024-02-07 19:13:00,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32808 conditions, 4851 events. 3324/4851 cut-off events. For 57268/57268 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22811 event pairs, 868 based on Foata normal form. 2/4853 useless extension candidates. Maximal degree in co-relation 32131. Up to 4267 conditions per place. [2024-02-07 19:13:00,069 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 243 selfloop transitions, 62 changer transitions 2/308 dead transitions. [2024-02-07 19:13:00,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 308 transitions, 5013 flow [2024-02-07 19:13:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:13:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:13:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-02-07 19:13:00,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5241379310344828 [2024-02-07 19:13:00,071 INFO L175 Difference]: Start difference. First operand has 109 places, 214 transitions, 3346 flow. Second operand 10 states and 152 transitions. [2024-02-07 19:13:00,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 308 transitions, 5013 flow [2024-02-07 19:13:00,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 308 transitions, 4760 flow, removed 103 selfloop flow, removed 3 redundant places. [2024-02-07 19:13:00,143 INFO L231 Difference]: Finished difference. Result has 119 places, 253 transitions, 4073 flow [2024-02-07 19:13:00,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3093, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4073, PETRI_PLACES=119, PETRI_TRANSITIONS=253} [2024-02-07 19:13:00,143 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 87 predicate places. [2024-02-07 19:13:00,143 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 253 transitions, 4073 flow [2024-02-07 19:13:00,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.833333333333334) internal successors, (118), 12 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:00,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:00,144 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] [2024-02-07 19:13:00,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:00,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:00,356 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:00,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:00,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2074592515, now seen corresponding path program 6 times [2024-02-07 19:13:00,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:00,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225184472] [2024-02-07 19:13:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:00,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:00,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:00,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225184472] [2024-02-07 19:13:00,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225184472] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:00,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941683352] [2024-02-07 19:13:00,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:13:00,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:00,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:00,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-02-07 19:13:00,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-02-07 19:13:00,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:00,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2024-02-07 19:13:00,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:00,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941683352] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:01,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:01,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 12 [2024-02-07 19:13:01,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996126842] [2024-02-07 19:13:01,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:01,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:13:01,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:01,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:13:01,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:13:01,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:01,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 253 transitions, 4073 flow. Second operand has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:01,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:01,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:01,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:02,321 INFO L124 PetriNetUnfolderBase]: 3584/5234 cut-off events. [2024-02-07 19:13:02,322 INFO L125 PetriNetUnfolderBase]: For 61948/61948 co-relation queries the response was YES. [2024-02-07 19:13:02,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35735 conditions, 5234 events. 3584/5234 cut-off events. For 61948/61948 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 25022 event pairs, 1024 based on Foata normal form. 1/5235 useless extension candidates. Maximal degree in co-relation 35037. Up to 4757 conditions per place. [2024-02-07 19:13:02,360 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 252 selfloop transitions, 59 changer transitions 1/313 dead transitions. [2024-02-07 19:13:02,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 313 transitions, 5344 flow [2024-02-07 19:13:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:13:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:13:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-02-07 19:13:02,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057471264367817 [2024-02-07 19:13:02,361 INFO L175 Difference]: Start difference. First operand has 119 places, 253 transitions, 4073 flow. Second operand 9 states and 132 transitions. [2024-02-07 19:13:02,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 313 transitions, 5344 flow [2024-02-07 19:13:02,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 313 transitions, 4992 flow, removed 164 selfloop flow, removed 2 redundant places. [2024-02-07 19:13:02,445 INFO L231 Difference]: Finished difference. Result has 127 places, 269 transitions, 4254 flow [2024-02-07 19:13:02,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3721, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4254, PETRI_PLACES=127, PETRI_TRANSITIONS=269} [2024-02-07 19:13:02,445 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 95 predicate places. [2024-02-07 19:13:02,445 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 269 transitions, 4254 flow [2024-02-07 19:13:02,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.307692307692308) internal successors, (134), 13 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:02,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:02,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:13:02,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:02,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:02,657 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:02,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:02,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1257822727, now seen corresponding path program 7 times [2024-02-07 19:13:02,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:02,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731162227] [2024-02-07 19:13:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:02,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:02,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:02,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731162227] [2024-02-07 19:13:02,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731162227] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:02,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191559243] [2024-02-07 19:13:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:13:02,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:02,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:02,735 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:02,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-02-07 19:13:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:02,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:13:02,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:02,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:02,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191559243] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:02,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:02,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-02-07 19:13:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278009856] [2024-02-07 19:13:02,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:02,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:13:02,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:02,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:13:02,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:13:02,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:02,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 269 transitions, 4254 flow. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:02,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:02,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:02,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:04,095 INFO L124 PetriNetUnfolderBase]: 5354/7690 cut-off events. [2024-02-07 19:13:04,095 INFO L125 PetriNetUnfolderBase]: For 100570/100570 co-relation queries the response was YES. [2024-02-07 19:13:04,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51839 conditions, 7690 events. 5354/7690 cut-off events. For 100570/100570 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 37929 event pairs, 538 based on Foata normal form. 54/7744 useless extension candidates. Maximal degree in co-relation 50487. Up to 2961 conditions per place. [2024-02-07 19:13:04,149 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 503 selfloop transitions, 130 changer transitions 0/634 dead transitions. [2024-02-07 19:13:04,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 634 transitions, 10900 flow [2024-02-07 19:13:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 19:13:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 19:13:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 211 transitions. [2024-02-07 19:13:04,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596816976127321 [2024-02-07 19:13:04,151 INFO L175 Difference]: Start difference. First operand has 127 places, 269 transitions, 4254 flow. Second operand 13 states and 211 transitions. [2024-02-07 19:13:04,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 634 transitions, 10900 flow [2024-02-07 19:13:04,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 634 transitions, 10064 flow, removed 392 selfloop flow, removed 3 redundant places. [2024-02-07 19:13:04,397 INFO L231 Difference]: Finished difference. Result has 144 places, 333 transitions, 5409 flow [2024-02-07 19:13:04,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3978, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5409, PETRI_PLACES=144, PETRI_TRANSITIONS=333} [2024-02-07 19:13:04,398 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2024-02-07 19:13:04,398 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 333 transitions, 5409 flow [2024-02-07 19:13:04,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:04,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:04,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:13:04,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:04,611 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,SelfDestructingSolverStorable20 [2024-02-07 19:13:04,611 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:04,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:04,612 INFO L85 PathProgramCache]: Analyzing trace with hash -384839430, now seen corresponding path program 8 times [2024-02-07 19:13:04,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:04,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488774577] [2024-02-07 19:13:04,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:04,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:04,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:04,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488774577] [2024-02-07 19:13:04,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488774577] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:04,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996303410] [2024-02-07 19:13:04,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:13:04,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:04,745 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:04,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-02-07 19:13:04,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:13:04,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:04,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:13:04,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:04,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:04,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996303410] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:04,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:04,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-02-07 19:13:04,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101988483] [2024-02-07 19:13:04,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:04,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-02-07 19:13:04,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:04,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-02-07 19:13:04,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-02-07 19:13:04,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:04,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 333 transitions, 5409 flow. Second operand has 16 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:04,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:04,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:04,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:08,097 INFO L124 PetriNetUnfolderBase]: 7291/10399 cut-off events. [2024-02-07 19:13:08,097 INFO L125 PetriNetUnfolderBase]: For 147444/147444 co-relation queries the response was YES. [2024-02-07 19:13:08,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79161 conditions, 10399 events. 7291/10399 cut-off events. For 147444/147444 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 53000 event pairs, 413 based on Foata normal form. 162/10561 useless extension candidates. Maximal degree in co-relation 76714. Up to 4257 conditions per place. [2024-02-07 19:13:08,185 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 632 selfloop transitions, 470 changer transitions 0/1103 dead transitions. [2024-02-07 19:13:08,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1103 transitions, 18760 flow [2024-02-07 19:13:08,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-02-07 19:13:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-02-07 19:13:08,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 702 transitions. [2024-02-07 19:13:08,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44012539184952976 [2024-02-07 19:13:08,188 INFO L175 Difference]: Start difference. First operand has 144 places, 333 transitions, 5409 flow. Second operand 55 states and 702 transitions. [2024-02-07 19:13:08,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1103 transitions, 18760 flow [2024-02-07 19:13:08,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 1103 transitions, 18015 flow, removed 314 selfloop flow, removed 1 redundant places. [2024-02-07 19:13:08,615 INFO L231 Difference]: Finished difference. Result has 221 places, 657 transitions, 12511 flow [2024-02-07 19:13:08,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5078, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=12511, PETRI_PLACES=221, PETRI_TRANSITIONS=657} [2024-02-07 19:13:08,616 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 189 predicate places. [2024-02-07 19:13:08,616 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 657 transitions, 12511 flow [2024-02-07 19:13:08,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:08,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:08,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:13:08,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:08,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:08,829 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:08,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:08,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1547268981, now seen corresponding path program 9 times [2024-02-07 19:13:08,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:08,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989791989] [2024-02-07 19:13:08,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:08,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:09,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:09,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989791989] [2024-02-07 19:13:09,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989791989] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:09,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686347536] [2024-02-07 19:13:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:13:09,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:09,005 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:09,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-02-07 19:13:09,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 19:13:09,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:09,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:13:09,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:09,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:09,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686347536] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:09,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:09,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-02-07 19:13:09,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596984426] [2024-02-07 19:13:09,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:09,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:13:09,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:09,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:13:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:13:09,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:09,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 657 transitions, 12511 flow. Second operand has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:09,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:09,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:09,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:11,806 INFO L124 PetriNetUnfolderBase]: 7584/10910 cut-off events. [2024-02-07 19:13:11,806 INFO L125 PetriNetUnfolderBase]: For 295317/295317 co-relation queries the response was YES. [2024-02-07 19:13:11,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98652 conditions, 10910 events. 7584/10910 cut-off events. For 295317/295317 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 57210 event pairs, 1622 based on Foata normal form. 148/11058 useless extension candidates. Maximal degree in co-relation 97866. Up to 5536 conditions per place. [2024-02-07 19:13:11,892 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 538 selfloop transitions, 328 changer transitions 6/873 dead transitions. [2024-02-07 19:13:11,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 873 transitions, 17407 flow [2024-02-07 19:13:11,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 19:13:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 19:13:11,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 214 transitions. [2024-02-07 19:13:11,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49195402298850577 [2024-02-07 19:13:11,894 INFO L175 Difference]: Start difference. First operand has 221 places, 657 transitions, 12511 flow. Second operand 15 states and 214 transitions. [2024-02-07 19:13:11,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 873 transitions, 17407 flow [2024-02-07 19:13:13,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 873 transitions, 14141 flow, removed 1297 selfloop flow, removed 7 redundant places. [2024-02-07 19:13:13,397 INFO L231 Difference]: Finished difference. Result has 234 places, 722 transitions, 11507 flow [2024-02-07 19:13:13,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=9367, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11507, PETRI_PLACES=234, PETRI_TRANSITIONS=722} [2024-02-07 19:13:13,398 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 202 predicate places. [2024-02-07 19:13:13,398 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 722 transitions, 11507 flow [2024-02-07 19:13:13,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.6923076923076925) internal successors, (100), 13 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:13,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:13,398 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:13:13,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:13,602 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,SelfDestructingSolverStorable22 [2024-02-07 19:13:13,607 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:13,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:13,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1623615623, now seen corresponding path program 10 times [2024-02-07 19:13:13,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:13,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132841761] [2024-02-07 19:13:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:13,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:13,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:13,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132841761] [2024-02-07 19:13:13,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132841761] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:13,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839492751] [2024-02-07 19:13:13,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:13:13,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:13,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:13,773 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:13,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-02-07 19:13:13,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:13:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:13,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:13:13,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:13,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:13,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839492751] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:13,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:13,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-02-07 19:13:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842226480] [2024-02-07 19:13:13,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:13,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-02-07 19:13:13,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-02-07 19:13:13,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-02-07 19:13:14,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:14,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 722 transitions, 11507 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:14,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:14,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:14,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:16,538 INFO L124 PetriNetUnfolderBase]: 8036/11686 cut-off events. [2024-02-07 19:13:16,539 INFO L125 PetriNetUnfolderBase]: For 379515/379515 co-relation queries the response was YES. [2024-02-07 19:13:16,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101904 conditions, 11686 events. 8036/11686 cut-off events. For 379515/379515 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 63283 event pairs, 1960 based on Foata normal form. 220/11906 useless extension candidates. Maximal degree in co-relation 101229. Up to 6416 conditions per place. [2024-02-07 19:13:16,635 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 633 selfloop transitions, 263 changer transitions 39/936 dead transitions. [2024-02-07 19:13:16,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 936 transitions, 16849 flow [2024-02-07 19:13:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:13:16,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:13:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-02-07 19:13:16,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775862068965517 [2024-02-07 19:13:16,637 INFO L175 Difference]: Start difference. First operand has 234 places, 722 transitions, 11507 flow. Second operand 8 states and 134 transitions. [2024-02-07 19:13:16,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 936 transitions, 16849 flow [2024-02-07 19:13:19,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 936 transitions, 16076 flow, removed 295 selfloop flow, removed 3 redundant places. [2024-02-07 19:13:19,146 INFO L231 Difference]: Finished difference. Result has 242 places, 777 transitions, 12879 flow [2024-02-07 19:13:19,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=11040, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12879, PETRI_PLACES=242, PETRI_TRANSITIONS=777} [2024-02-07 19:13:19,148 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 210 predicate places. [2024-02-07 19:13:19,148 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 777 transitions, 12879 flow [2024-02-07 19:13:19,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:19,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:19,148 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:13:19,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:19,353 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,SelfDestructingSolverStorable23 [2024-02-07 19:13:19,353 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:19,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1225176091, now seen corresponding path program 11 times [2024-02-07 19:13:19,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:19,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271734648] [2024-02-07 19:13:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:19,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:19,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:19,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271734648] [2024-02-07 19:13:19,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271734648] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:19,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540833501] [2024-02-07 19:13:19,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-07 19:13:19,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:19,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:19,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:19,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-02-07 19:13:19,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-02-07 19:13:19,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:19,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:13:19,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:19,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:19,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540833501] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:19,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:19,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-02-07 19:13:19,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089140317] [2024-02-07 19:13:19,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:19,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 19:13:19,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:19,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 19:13:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-02-07 19:13:19,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:19,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 777 transitions, 12879 flow. Second operand has 17 states, 17 states have (on average 7.176470588235294) internal successors, (122), 17 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:19,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:19,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:19,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:23,263 INFO L124 PetriNetUnfolderBase]: 9326/13322 cut-off events. [2024-02-07 19:13:23,263 INFO L125 PetriNetUnfolderBase]: For 487439/487439 co-relation queries the response was YES. [2024-02-07 19:13:23,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126034 conditions, 13322 events. 9326/13322 cut-off events. For 487439/487439 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 71268 event pairs, 1655 based on Foata normal form. 110/13432 useless extension candidates. Maximal degree in co-relation 125576. Up to 8044 conditions per place. [2024-02-07 19:13:23,383 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 671 selfloop transitions, 635 changer transitions 0/1307 dead transitions. [2024-02-07 19:13:23,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 1307 transitions, 25645 flow [2024-02-07 19:13:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-02-07 19:13:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-02-07 19:13:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 423 transitions. [2024-02-07 19:13:23,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558189655172414 [2024-02-07 19:13:23,385 INFO L175 Difference]: Start difference. First operand has 242 places, 777 transitions, 12879 flow. Second operand 32 states and 423 transitions. [2024-02-07 19:13:23,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 1307 transitions, 25645 flow [2024-02-07 19:13:26,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 1307 transitions, 24822 flow, removed 320 selfloop flow, removed 1 redundant places. [2024-02-07 19:13:26,300 INFO L231 Difference]: Finished difference. Result has 283 places, 1087 transitions, 21837 flow [2024-02-07 19:13:26,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=12613, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=21837, PETRI_PLACES=283, PETRI_TRANSITIONS=1087} [2024-02-07 19:13:26,301 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 251 predicate places. [2024-02-07 19:13:26,301 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 1087 transitions, 21837 flow [2024-02-07 19:13:26,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.176470588235294) internal successors, (122), 17 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:26,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:26,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:13:26,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:26,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-02-07 19:13:26,512 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:26,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:26,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1048159375, now seen corresponding path program 12 times [2024-02-07 19:13:26,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:26,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330086102] [2024-02-07 19:13:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:26,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:26,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:26,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330086102] [2024-02-07 19:13:26,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330086102] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:26,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447101984] [2024-02-07 19:13:26,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-02-07 19:13:26,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:26,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:26,656 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:26,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-02-07 19:13:26,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-02-07 19:13:26,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:26,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:13:26,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:26,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:26,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447101984] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:26,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:26,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2024-02-07 19:13:26,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157900940] [2024-02-07 19:13:26,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:26,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-02-07 19:13:26,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:26,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-02-07 19:13:26,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-02-07 19:13:26,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:26,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 1087 transitions, 21837 flow. Second operand has 17 states, 17 states have (on average 7.882352941176471) internal successors, (134), 17 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:26,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:26,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:26,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:32,349 INFO L124 PetriNetUnfolderBase]: 10992/15620 cut-off events. [2024-02-07 19:13:32,349 INFO L125 PetriNetUnfolderBase]: For 737207/737207 co-relation queries the response was YES. [2024-02-07 19:13:32,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162078 conditions, 15620 events. 10992/15620 cut-off events. For 737207/737207 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 85133 event pairs, 1522 based on Foata normal form. 534/16154 useless extension candidates. Maximal degree in co-relation 161458. Up to 7414 conditions per place. [2024-02-07 19:13:32,510 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 726 selfloop transitions, 1218 changer transitions 4/1949 dead transitions. [2024-02-07 19:13:32,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1949 transitions, 45419 flow [2024-02-07 19:13:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-02-07 19:13:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2024-02-07 19:13:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 866 transitions. [2024-02-07 19:13:32,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41475095785440613 [2024-02-07 19:13:32,520 INFO L175 Difference]: Start difference. First operand has 283 places, 1087 transitions, 21837 flow. Second operand 72 states and 866 transitions. [2024-02-07 19:13:32,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1949 transitions, 45419 flow [2024-02-07 19:13:39,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1949 transitions, 35338 flow, removed 4729 selfloop flow, removed 3 redundant places. [2024-02-07 19:13:39,841 INFO L231 Difference]: Finished difference. Result has 379 places, 1642 transitions, 31986 flow [2024-02-07 19:13:39,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=17238, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1056, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=31986, PETRI_PLACES=379, PETRI_TRANSITIONS=1642} [2024-02-07 19:13:39,843 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 347 predicate places. [2024-02-07 19:13:39,843 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1642 transitions, 31986 flow [2024-02-07 19:13:39,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.882352941176471) internal successors, (134), 17 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:39,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:39,843 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:13:39,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-02-07 19:13:40,054 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,SelfDestructingSolverStorable25 [2024-02-07 19:13:40,055 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:40,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:40,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1425244954, now seen corresponding path program 13 times [2024-02-07 19:13:40,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:40,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790873460] [2024-02-07 19:13:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:40,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:13:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790873460] [2024-02-07 19:13:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790873460] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409099721] [2024-02-07 19:13:40,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-02-07 19:13:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:40,177 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:40,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-02-07 19:13:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:40,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:13:40,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:40,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:40,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409099721] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:40,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:40,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-02-07 19:13:40,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288903308] [2024-02-07 19:13:40,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:40,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-07 19:13:40,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:40,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-07 19:13:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-02-07 19:13:40,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:40,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1642 transitions, 31986 flow. Second operand has 13 states, 13 states have (on average 8.0) internal successors, (104), 13 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:40,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:40,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:40,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:13:47,027 INFO L124 PetriNetUnfolderBase]: 12386/17814 cut-off events. [2024-02-07 19:13:47,027 INFO L125 PetriNetUnfolderBase]: For 539476/539476 co-relation queries the response was YES. [2024-02-07 19:13:47,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170838 conditions, 17814 events. 12386/17814 cut-off events. For 539476/539476 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 102295 event pairs, 1521 based on Foata normal form. 534/18348 useless extension candidates. Maximal degree in co-relation 170099. Up to 7115 conditions per place. [2024-02-07 19:13:47,268 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 1173 selfloop transitions, 915 changer transitions 325/2414 dead transitions. [2024-02-07 19:13:47,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2414 transitions, 51273 flow [2024-02-07 19:13:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-07 19:13:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-07 19:13:47,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 440 transitions. [2024-02-07 19:13:47,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462474645030426 [2024-02-07 19:13:47,270 INFO L175 Difference]: Start difference. First operand has 379 places, 1642 transitions, 31986 flow. Second operand 34 states and 440 transitions. [2024-02-07 19:13:47,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 2414 transitions, 51273 flow [2024-02-07 19:13:53,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 2414 transitions, 43105 flow, removed 3432 selfloop flow, removed 12 redundant places. [2024-02-07 19:13:53,051 INFO L231 Difference]: Finished difference. Result has 426 places, 1792 transitions, 32192 flow [2024-02-07 19:13:53,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=25135, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=32192, PETRI_PLACES=426, PETRI_TRANSITIONS=1792} [2024-02-07 19:13:53,053 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 394 predicate places. [2024-02-07 19:13:53,053 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1792 transitions, 32192 flow [2024-02-07 19:13:53,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.0) internal successors, (104), 13 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:53,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:13:53,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:13:53,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-02-07 19:13:53,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:53,254 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:13:53,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:13:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash -949451591, now seen corresponding path program 14 times [2024-02-07 19:13:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:13:53,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638127105] [2024-02-07 19:13:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:13:53,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:13:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:13:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:53,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:13:53,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638127105] [2024-02-07 19:13:53,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638127105] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:13:53,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653166143] [2024-02-07 19:13:53,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-07 19:13:53,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:13:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:13:53,356 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:13:53,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-02-07 19:13:53,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-07 19:13:53,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:13:53,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:13:53,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:13:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:53,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:13:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:13:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653166143] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:13:53,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:13:53,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-02-07 19:13:53,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324957109] [2024-02-07 19:13:53,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:13:53,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:13:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:13:53,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:13:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:13:53,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:13:53,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1792 transitions, 32192 flow. Second operand has 14 states, 14 states have (on average 8.142857142857142) internal successors, (114), 14 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:13:53,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:13:53,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:13:53,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:01,003 INFO L124 PetriNetUnfolderBase]: 12577/17985 cut-off events. [2024-02-07 19:14:01,004 INFO L125 PetriNetUnfolderBase]: For 616613/616613 co-relation queries the response was YES. [2024-02-07 19:14:01,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181122 conditions, 17985 events. 12577/17985 cut-off events. For 616613/616613 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 102914 event pairs, 766 based on Foata normal form. 328/18313 useless extension candidates. Maximal degree in co-relation 180917. Up to 6151 conditions per place. [2024-02-07 19:14:01,218 INFO L140 encePairwiseOnDemand]: 20/29 looper letters, 1843 selfloop transitions, 971 changer transitions 51/2866 dead transitions. [2024-02-07 19:14:01,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 2866 transitions, 61036 flow [2024-02-07 19:14:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-02-07 19:14:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-02-07 19:14:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 457 transitions. [2024-02-07 19:14:01,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634888438133874 [2024-02-07 19:14:01,220 INFO L175 Difference]: Start difference. First operand has 426 places, 1792 transitions, 32192 flow. Second operand 34 states and 457 transitions. [2024-02-07 19:14:01,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 2866 transitions, 61036 flow [2024-02-07 19:14:08,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 2866 transitions, 57999 flow, removed 1355 selfloop flow, removed 12 redundant places. [2024-02-07 19:14:08,192 INFO L231 Difference]: Finished difference. Result has 464 places, 2102 transitions, 41520 flow [2024-02-07 19:14:08,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=30801, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1073, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=41520, PETRI_PLACES=464, PETRI_TRANSITIONS=2102} [2024-02-07 19:14:08,193 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 432 predicate places. [2024-02-07 19:14:08,194 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 2102 transitions, 41520 flow [2024-02-07 19:14:08,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.142857142857142) internal successors, (114), 14 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:08,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:08,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:08,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-02-07 19:14:08,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-02-07 19:14:08,405 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:08,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:08,405 INFO L85 PathProgramCache]: Analyzing trace with hash -274801783, now seen corresponding path program 15 times [2024-02-07 19:14:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:08,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770430904] [2024-02-07 19:14:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:08,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:08,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770430904] [2024-02-07 19:14:08,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770430904] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:08,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85274927] [2024-02-07 19:14:08,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-07 19:14:08,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:08,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:08,491 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:08,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-02-07 19:14:08,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-02-07 19:14:08,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:14:08,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:14:08,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:08,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:08,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85274927] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:08,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:08,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2024-02-07 19:14:08,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840645502] [2024-02-07 19:14:08,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:08,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-02-07 19:14:08,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-02-07 19:14:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-02-07 19:14:08,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:14:08,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 2102 transitions, 41520 flow. Second operand has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:08,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:08,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:14:08,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:14:18,380 INFO L124 PetriNetUnfolderBase]: 16134/22648 cut-off events. [2024-02-07 19:14:18,380 INFO L125 PetriNetUnfolderBase]: For 801123/801123 co-relation queries the response was YES. [2024-02-07 19:14:18,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240123 conditions, 22648 events. 16134/22648 cut-off events. For 801123/801123 co-relation queries the response was YES. Maximal size of possible extension queue 1034. Compared 128542 event pairs, 1490 based on Foata normal form. 270/22918 useless extension candidates. Maximal degree in co-relation 239363. Up to 9282 conditions per place. [2024-02-07 19:14:18,889 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 2105 selfloop transitions, 1294 changer transitions 25/3425 dead transitions. [2024-02-07 19:14:18,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 3425 transitions, 76269 flow [2024-02-07 19:14:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-02-07 19:14:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-02-07 19:14:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 291 transitions. [2024-02-07 19:14:18,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017241379310344 [2024-02-07 19:14:18,891 INFO L175 Difference]: Start difference. First operand has 464 places, 2102 transitions, 41520 flow. Second operand 20 states and 291 transitions. [2024-02-07 19:14:18,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 3425 transitions, 76269 flow [2024-02-07 19:14:30,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 3425 transitions, 73517 flow, removed 1071 selfloop flow, removed 4 redundant places. [2024-02-07 19:14:30,241 INFO L231 Difference]: Finished difference. Result has 489 places, 2586 transitions, 54058 flow [2024-02-07 19:14:30,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=39255, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=857, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1094, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=54058, PETRI_PLACES=489, PETRI_TRANSITIONS=2586} [2024-02-07 19:14:30,243 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 457 predicate places. [2024-02-07 19:14:30,243 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 2586 transitions, 54058 flow [2024-02-07 19:14:30,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.642857142857143) internal successors, (107), 14 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:30,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:14:30,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:14:30,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-02-07 19:14:30,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-02-07 19:14:30,454 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-02-07 19:14:30,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:14:30,454 INFO L85 PathProgramCache]: Analyzing trace with hash -273401407, now seen corresponding path program 16 times [2024-02-07 19:14:30,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:14:30,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197123500] [2024-02-07 19:14:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:14:30,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:14:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:14:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:14:30,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:14:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197123500] [2024-02-07 19:14:30,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197123500] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-07 19:14:30,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126483625] [2024-02-07 19:14:30,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-07 19:14:30,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-07 19:14:30,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:14:30,521 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-02-07 19:14:30,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-02-07 19:14:30,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-07 19:14:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-07 19:14:30,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2024-02-07 19:14:30,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-07 19:14:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:14:30,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-07 19:14:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-02-07 19:14:30,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126483625] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-07 19:14:30,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-07 19:14:30,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-02-07 19:14:30,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81170551] [2024-02-07 19:14:30,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-07 19:14:30,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-02-07 19:14:30,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:14:30,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-02-07 19:14:30,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-02-07 19:14:30,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-07 19:14:30,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 2586 transitions, 54058 flow. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-07 19:14:30,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:14:30,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-07 19:14:30,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand