./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/security.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/security.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 958ec4d9 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/security.wvr.c ./goblint.2024-02-07_10-47-16.files/SV-COMP24_unreach-call/security.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-dev-958ec4d-m [2024-02-07 14:42:57,065 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 14:42:57,237 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 14:42:57,244 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 14:42:57,245 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 14:42:57,275 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 14:42:57,276 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 14:42:57,276 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 14:42:57,277 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 14:42:57,281 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 14:42:57,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 14:42:57,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 14:42:57,283 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 14:42:57,284 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 14:42:57,284 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 14:42:57,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 14:42:57,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 14:42:57,285 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 14:42:57,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 14:42:57,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 14:42:57,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 14:42:57,286 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 14:42:57,286 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 14:42:57,287 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 14:42:57,287 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 14:42:57,287 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 14:42:57,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 14:42:57,288 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 14:42:57,288 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 14:42:57,289 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 14:42:57,290 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 14:42:57,290 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 14:42:57,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:42:57,290 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 14:42:57,290 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 14:42:57,291 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 14:42:57,291 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 14:42:57,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 14:42:57,291 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 14:42:57,291 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 14:42:57,292 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 14:42:57,292 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 14:42:57,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 14:42:57,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 14:42:57,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 14:42:57,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 14:42:57,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 14:42:57,557 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 14:42:57,558 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 14:42:57,558 INFO L431 ainManager$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/security.wvr.yml/witness.yml [2024-02-07 14:42:57,674 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 14:42:57,675 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 14:42:57,677 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/security.wvr.c [2024-02-07 14:42:58,764 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 14:42:58,981 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 14:42:58,981 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/security.wvr.c [2024-02-07 14:42:58,987 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71911da30/6188109ac136465da82d8f1f8e0d89ac/FLAG4e542ecf1 [2024-02-07 14:42:58,997 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71911da30/6188109ac136465da82d8f1f8e0d89ac [2024-02-07 14:42:58,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 14:42:58,998 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 14:42:58,999 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 14:42:58,999 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 14:42:59,003 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 14:42:59,004 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:42:57" (1/2) ... [2024-02-07 14:42:59,005 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f01d25b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:59, skipping insertion in model container [2024-02-07 14:42:59,005 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:42:57" (1/2) ... [2024-02-07 14:42:59,006 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e462721 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 02:42:59, skipping insertion in model container [2024-02-07 14:42:59,007 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:42:58" (2/2) ... [2024-02-07 14:42:59,007 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f01d25b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59, skipping insertion in model container [2024-02-07 14:42:59,007 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 02:42:58" (2/2) ... [2024-02-07 14:42:59,007 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 14:42:59,025 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 14:42:59,029 INFO L76 edCorrectnessWitness]: Location invariant before [L56-L56] (z2 <= 1U) && (z2 == 0U || z2 == 1U) [2024-02-07 14:42:59,029 INFO L76 edCorrectnessWitness]: Location invariant before [L48-L48] (x1 <= 1U) && (x1 == 0U || x1 == 1U) [2024-02-07 14:42:59,030 INFO L76 edCorrectnessWitness]: Location invariant before [L46-L46] (z1 <= 1U) && (z1 == 0U || z1 == 1U) [2024-02-07 14:42:59,030 INFO L76 edCorrectnessWitness]: Location invariant before [L60-L60] (x2 <= 1U) && (x2 == 0U || x2 == 1U) [2024-02-07 14:42:59,030 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] (z1 <= 1U) && (z1 == 0U || z1 == 1U) [2024-02-07 14:42:59,030 INFO L76 edCorrectnessWitness]: Location invariant before [L58-L58] (z2 <= 1U) && (z2 == 0U || z2 == 1U) [2024-02-07 14:42:59,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2024-02-07 14:42:59,174 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/security.wvr.c[1957,1970] [2024-02-07 14:42:59,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:42:59,188 INFO L203 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-02-07 14:42:59,225 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/security.wvr.c[1957,1970] [2024-02-07 14:42:59,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-02-07 14:42:59,240 INFO L207 MainTranslator]: Completed translation [2024-02-07 14:42:59,241 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59 WrapperNode [2024-02-07 14:42:59,241 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 14:42:59,242 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 14:42:59,242 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 14:42:59,242 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 14:42:59,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,270 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,293 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2024-02-07 14:42:59,294 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 14:42:59,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 14:42:59,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 14:42:59,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 14:42:59,306 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,316 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,328 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-02-07 14:42:59,328 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,328 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,333 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,334 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,335 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,336 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 14:42:59,339 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 14:42:59,339 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 14:42:59,339 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 14:42:59,340 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (1/1) ... [2024-02-07 14:42:59,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 14:42:59,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 14:42:59,369 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 14:42:59,385 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 14:42:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 14:42:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 14:42:59,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 14:42:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 14:42:59,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 14:42:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 14:42:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 14:42:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 14:42:59,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 14:42:59,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 14:42:59,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 14:42:59,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 14:42:59,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 14:42:59,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 14:42:59,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 14:42:59,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 14:42:59,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 14:42:59,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 14:42:59,403 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 14:42:59,484 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 14:42:59,487 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 14:42:59,655 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 14:42:59,656 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 14:42:59,775 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 14:42:59,775 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-07 14:42:59,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:42:59 BoogieIcfgContainer [2024-02-07 14:42:59,776 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 14:42:59,777 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 14:42:59,778 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 14:42:59,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 14:42:59,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 02:42:57" (1/4) ... [2024-02-07 14:42:59,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363364f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 02:42:59, skipping insertion in model container [2024-02-07 14:42:59,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 02:42:58" (2/4) ... [2024-02-07 14:42:59,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363364f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:42:59, skipping insertion in model container [2024-02-07 14:42:59,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 02:42:59" (3/4) ... [2024-02-07 14:42:59,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363364f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 02:42:59, skipping insertion in model container [2024-02-07 14:42:59,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 02:42:59" (4/4) ... [2024-02-07 14:42:59,783 INFO L112 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2024-02-07 14:42:59,799 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 14:42:59,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-02-07 14:42:59,799 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 14:42:59,851 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 14:42:59,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 31 transitions, 76 flow [2024-02-07 14:42:59,926 INFO L124 PetriNetUnfolderBase]: 2/29 cut-off events. [2024-02-07 14:42:59,926 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 14:42:59,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 2/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-02-07 14:42:59,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 31 transitions, 76 flow [2024-02-07 14:42:59,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 28 transitions, 68 flow [2024-02-07 14:42:59,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 14:42:59,957 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;@1e00a29e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 14:42:59,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-02-07 14:42:59,962 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 14:42:59,962 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2024-02-07 14:42:59,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 14:42:59,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:42:59,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 14:42:59,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:42:59,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:42:59,968 INFO L85 PathProgramCache]: Analyzing trace with hash 213529999, now seen corresponding path program 1 times [2024-02-07 14:42:59,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:42:59,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294988004] [2024-02-07 14:42:59,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:42:59,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:00,296 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 14:43:00,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:00,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294988004] [2024-02-07 14:43:00,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294988004] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:00,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:00,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:00,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396801508] [2024-02-07 14:43:00,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:00,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:00,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:00,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:00,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 14:43:00,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 14:43:00,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:00,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 14:43:00,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:00,466 INFO L124 PetriNetUnfolderBase]: 133/253 cut-off events. [2024-02-07 14:43:00,466 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-02-07 14:43:00,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 253 events. 133/253 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 972 event pairs, 5 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 440. Up to 210 conditions per place. [2024-02-07 14:43:00,471 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 29 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2024-02-07 14:43:00,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 145 flow [2024-02-07 14:43:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-02-07 14:43:00,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-02-07 14:43:00,505 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 68 flow. Second operand 3 states and 53 transitions. [2024-02-07 14:43:00,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 145 flow [2024-02-07 14:43:00,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:00,511 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 58 flow [2024-02-07 14:43:00,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-02-07 14:43:00,517 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2024-02-07 14:43:00,517 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 58 flow [2024-02-07 14:43:00,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 14:43:00,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:00,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 14:43:00,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 14:43:00,519 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:00,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1970504387, now seen corresponding path program 1 times [2024-02-07 14:43:00,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774076391] [2024-02-07 14:43:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:00,614 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 14:43:00,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:00,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774076391] [2024-02-07 14:43:00,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774076391] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:00,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:00,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:00,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485087303] [2024-02-07 14:43:00,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:00,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:00,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:00,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-02-07 14:43:00,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:43:00,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:00,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-02-07 14:43:00,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:00,717 INFO L124 PetriNetUnfolderBase]: 191/390 cut-off events. [2024-02-07 14:43:00,717 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-07 14:43:00,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 763 conditions, 390 events. 191/390 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1723 event pairs, 123 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 666. Up to 253 conditions per place. [2024-02-07 14:43:00,720 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 35 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2024-02-07 14:43:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 161 flow [2024-02-07 14:43:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-02-07 14:43:00,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2024-02-07 14:43:00,723 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 58 flow. Second operand 3 states and 61 transitions. [2024-02-07 14:43:00,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 161 flow [2024-02-07 14:43:00,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:00,725 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 62 flow [2024-02-07 14:43:00,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-02-07 14:43:00,726 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-02-07 14:43:00,726 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 62 flow [2024-02-07 14:43:00,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:43:00,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:00,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 14:43:00,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 14:43:00,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:00,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1970503364, now seen corresponding path program 1 times [2024-02-07 14:43:00,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:00,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079800806] [2024-02-07 14:43:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:00,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:00,808 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 14:43:00,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079800806] [2024-02-07 14:43:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079800806] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:00,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:00,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:00,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547117446] [2024-02-07 14:43:00,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:00,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:00,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:00,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-02-07 14:43:00,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:43:00,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:00,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-02-07 14:43:00,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:00,947 INFO L124 PetriNetUnfolderBase]: 171/320 cut-off events. [2024-02-07 14:43:00,948 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-02-07 14:43:00,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 320 events. 171/320 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1306 event pairs, 5 based on Foata normal form. 14/300 useless extension candidates. Maximal degree in co-relation 464. Up to 188 conditions per place. [2024-02-07 14:43:00,955 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 36 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-02-07 14:43:00,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 174 flow [2024-02-07 14:43:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-02-07 14:43:00,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-02-07 14:43:00,958 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 62 flow. Second operand 4 states and 64 transitions. [2024-02-07 14:43:00,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 174 flow [2024-02-07 14:43:00,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:00,963 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 62 flow [2024-02-07 14:43:00,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=62, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-02-07 14:43:00,964 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-02-07 14:43:00,965 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 62 flow [2024-02-07 14:43:00,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:43:00,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:00,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:00,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 14:43:00,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:00,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:00,967 INFO L85 PathProgramCache]: Analyzing trace with hash -972116303, now seen corresponding path program 1 times [2024-02-07 14:43:00,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:00,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162494823] [2024-02-07 14:43:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:00,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:00,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:01,053 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 14:43:01,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:01,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162494823] [2024-02-07 14:43:01,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162494823] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:01,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:01,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:01,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456883490] [2024-02-07 14:43:01,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:01,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:01,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:01,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:01,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:01,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 14:43:01,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 14:43:01,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:01,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 14:43:01,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:01,133 INFO L124 PetriNetUnfolderBase]: 171/334 cut-off events. [2024-02-07 14:43:01,133 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-02-07 14:43:01,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 334 events. 171/334 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1338 event pairs, 21 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 592. Up to 254 conditions per place. [2024-02-07 14:43:01,136 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2024-02-07 14:43:01,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 145 flow [2024-02-07 14:43:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-02-07 14:43:01,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-02-07 14:43:01,139 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 62 flow. Second operand 3 states and 53 transitions. [2024-02-07 14:43:01,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 145 flow [2024-02-07 14:43:01,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:01,141 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 56 flow [2024-02-07 14:43:01,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-02-07 14:43:01,143 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2024-02-07 14:43:01,143 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 56 flow [2024-02-07 14:43:01,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 14:43:01,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:01,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:01,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 14:43:01,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:01,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash -70834076, now seen corresponding path program 1 times [2024-02-07 14:43:01,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:01,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152761215] [2024-02-07 14:43:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:01,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:01,204 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 14:43:01,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:01,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152761215] [2024-02-07 14:43:01,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152761215] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:01,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:01,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 14:43:01,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548045026] [2024-02-07 14:43:01,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:01,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 14:43:01,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:01,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 14:43:01,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 14:43:01,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-02-07 14:43:01,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 14:43:01,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:01,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-02-07 14:43:01,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:01,295 INFO L124 PetriNetUnfolderBase]: 229/438 cut-off events. [2024-02-07 14:43:01,295 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-07 14:43:01,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 438 events. 229/438 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1762 event pairs, 177 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 859. Up to 339 conditions per place. [2024-02-07 14:43:01,298 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 33 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2024-02-07 14:43:01,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2024-02-07 14:43:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 14:43:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 14:43:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-02-07 14:43:01,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6344086021505376 [2024-02-07 14:43:01,307 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 56 flow. Second operand 3 states and 59 transitions. [2024-02-07 14:43:01,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2024-02-07 14:43:01,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-02-07 14:43:01,308 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 60 flow [2024-02-07 14:43:01,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2024-02-07 14:43:01,309 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-02-07 14:43:01,309 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 60 flow [2024-02-07 14:43:01,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 14:43:01,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:01,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:01,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 14:43:01,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:01,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash -70833053, now seen corresponding path program 1 times [2024-02-07 14:43:01,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:01,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351403826] [2024-02-07 14:43:01,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:01,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:01,363 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 14:43:01,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:01,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351403826] [2024-02-07 14:43:01,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351403826] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:01,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:01,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 14:43:01,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070234195] [2024-02-07 14:43:01,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:01,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 14:43:01,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 14:43:01,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 14:43:01,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-02-07 14:43:01,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 14:43:01,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:01,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-02-07 14:43:01,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:01,456 INFO L124 PetriNetUnfolderBase]: 203/392 cut-off events. [2024-02-07 14:43:01,456 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-02-07 14:43:01,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 392 events. 203/392 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1604 event pairs, 21 based on Foata normal form. 20/374 useless extension candidates. Maximal degree in co-relation 789. Up to 192 conditions per place. [2024-02-07 14:43:01,459 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 36 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-02-07 14:43:01,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 180 flow [2024-02-07 14:43:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 14:43:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 14:43:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-02-07 14:43:01,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-02-07 14:43:01,461 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 60 flow. Second operand 4 states and 64 transitions. [2024-02-07 14:43:01,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 180 flow [2024-02-07 14:43:01,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:01,462 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 60 flow [2024-02-07 14:43:01,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2024-02-07 14:43:01,463 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-02-07 14:43:01,464 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 60 flow [2024-02-07 14:43:01,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 14:43:01,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:01,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:01,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 14:43:01,465 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:01,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:01,465 INFO L85 PathProgramCache]: Analyzing trace with hash -828502913, now seen corresponding path program 1 times [2024-02-07 14:43:01,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:01,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349089884] [2024-02-07 14:43:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:01,658 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 14:43:01,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:01,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349089884] [2024-02-07 14:43:01,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349089884] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:01,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:01,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:43:01,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153990902] [2024-02-07 14:43:01,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:01,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:01,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:01,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:01,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:43:01,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 14:43:01,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 60 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:01,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:01,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 14:43:01,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:01,841 INFO L124 PetriNetUnfolderBase]: 205/403 cut-off events. [2024-02-07 14:43:01,841 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-02-07 14:43:01,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 403 events. 205/403 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1664 event pairs, 85 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 865. Up to 148 conditions per place. [2024-02-07 14:43:01,844 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 51 selfloop transitions, 8 changer transitions 10/70 dead transitions. [2024-02-07 14:43:01,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 70 transitions, 330 flow [2024-02-07 14:43:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-02-07 14:43:01,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080645161290323 [2024-02-07 14:43:01,845 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 60 flow. Second operand 8 states and 126 transitions. [2024-02-07 14:43:01,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 70 transitions, 330 flow [2024-02-07 14:43:01,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:01,848 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 107 flow [2024-02-07 14:43:01,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=107, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2024-02-07 14:43:01,848 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2024-02-07 14:43:01,849 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 107 flow [2024-02-07 14:43:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:01,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:01,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:01,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 14:43:01,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:01,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:01,850 INFO L85 PathProgramCache]: Analyzing trace with hash 581456629, now seen corresponding path program 2 times [2024-02-07 14:43:01,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:01,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892731305] [2024-02-07 14:43:01,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:02,026 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 14:43:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:02,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892731305] [2024-02-07 14:43:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892731305] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:02,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:02,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:43:02,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362451184] [2024-02-07 14:43:02,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:02,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:02,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:43:02,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 14:43:02,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 107 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:02,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:02,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 14:43:02,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:02,237 INFO L124 PetriNetUnfolderBase]: 204/413 cut-off events. [2024-02-07 14:43:02,238 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2024-02-07 14:43:02,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1218 conditions, 413 events. 204/413 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1737 event pairs, 83 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1190. Up to 152 conditions per place. [2024-02-07 14:43:02,241 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 56 selfloop transitions, 15 changer transitions 6/78 dead transitions. [2024-02-07 14:43:02,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 434 flow [2024-02-07 14:43:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:43:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:43:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-02-07 14:43:02,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-02-07 14:43:02,243 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 107 flow. Second operand 9 states and 135 transitions. [2024-02-07 14:43:02,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 434 flow [2024-02-07 14:43:02,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 78 transitions, 422 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:02,249 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 210 flow [2024-02-07 14:43:02,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=210, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2024-02-07 14:43:02,251 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2024-02-07 14:43:02,251 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 210 flow [2024-02-07 14:43:02,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:02,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:02,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:02,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 14:43:02,252 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:02,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1970302350, now seen corresponding path program 1 times [2024-02-07 14:43:02,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:02,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887483575] [2024-02-07 14:43:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:02,463 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 14:43:02,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:02,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887483575] [2024-02-07 14:43:02,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887483575] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:02,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:02,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:02,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703938969] [2024-02-07 14:43:02,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:02,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:02,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:02,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:02,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 210 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:02,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:02,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:02,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:02,801 INFO L124 PetriNetUnfolderBase]: 231/505 cut-off events. [2024-02-07 14:43:02,801 INFO L125 PetriNetUnfolderBase]: For 429/429 co-relation queries the response was YES. [2024-02-07 14:43:02,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 505 events. 231/505 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2456 event pairs, 85 based on Foata normal form. 3/464 useless extension candidates. Maximal degree in co-relation 1567. Up to 148 conditions per place. [2024-02-07 14:43:02,805 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 75 selfloop transitions, 24 changer transitions 15/115 dead transitions. [2024-02-07 14:43:02,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 115 transitions, 708 flow [2024-02-07 14:43:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 14:43:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 14:43:02,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 183 transitions. [2024-02-07 14:43:02,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-02-07 14:43:02,807 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 210 flow. Second operand 15 states and 183 transitions. [2024-02-07 14:43:02,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 115 transitions, 708 flow [2024-02-07 14:43:02,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 681 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-02-07 14:43:02,813 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 347 flow [2024-02-07 14:43:02,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=347, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2024-02-07 14:43:02,814 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2024-02-07 14:43:02,814 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 347 flow [2024-02-07 14:43:02,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:02,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:02,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:02,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 14:43:02,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:02,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:02,815 INFO L85 PathProgramCache]: Analyzing trace with hash -840619170, now seen corresponding path program 2 times [2024-02-07 14:43:02,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:02,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332591999] [2024-02-07 14:43:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:02,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:03,021 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 14:43:03,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:03,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332591999] [2024-02-07 14:43:03,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332591999] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:03,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:03,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:03,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999470705] [2024-02-07 14:43:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:03,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:03,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:03,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:03,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:03,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:03,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:03,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:03,260 INFO L124 PetriNetUnfolderBase]: 224/491 cut-off events. [2024-02-07 14:43:03,260 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-02-07 14:43:03,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1806 conditions, 491 events. 224/491 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2324 event pairs, 19 based on Foata normal form. 1/448 useless extension candidates. Maximal degree in co-relation 1742. Up to 155 conditions per place. [2024-02-07 14:43:03,265 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 53 selfloop transitions, 35 changer transitions 6/95 dead transitions. [2024-02-07 14:43:03,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 95 transitions, 748 flow [2024-02-07 14:43:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-02-07 14:43:03,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-02-07 14:43:03,267 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 347 flow. Second operand 11 states and 127 transitions. [2024-02-07 14:43:03,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 95 transitions, 748 flow [2024-02-07 14:43:03,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 95 transitions, 691 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-02-07 14:43:03,274 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 492 flow [2024-02-07 14:43:03,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=492, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2024-02-07 14:43:03,275 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 41 predicate places. [2024-02-07 14:43:03,275 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 492 flow [2024-02-07 14:43:03,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:03,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:03,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:03,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 14:43:03,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:03,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash -798026720, now seen corresponding path program 3 times [2024-02-07 14:43:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:03,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193261535] [2024-02-07 14:43:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:03,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:03,477 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 14:43:03,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:03,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193261535] [2024-02-07 14:43:03,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193261535] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:03,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:03,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:03,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961224579] [2024-02-07 14:43:03,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:03,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:03,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:03,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:03,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:03,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 56 transitions, 492 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:03,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:03,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:03,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:03,718 INFO L124 PetriNetUnfolderBase]: 231/510 cut-off events. [2024-02-07 14:43:03,718 INFO L125 PetriNetUnfolderBase]: For 905/905 co-relation queries the response was YES. [2024-02-07 14:43:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1961 conditions, 510 events. 231/510 cut-off events. For 905/905 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2490 event pairs, 85 based on Foata normal form. 1/463 useless extension candidates. Maximal degree in co-relation 1906. Up to 148 conditions per place. [2024-02-07 14:43:03,722 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 51 selfloop transitions, 26 changer transitions 19/97 dead transitions. [2024-02-07 14:43:03,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 97 transitions, 812 flow [2024-02-07 14:43:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:43:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:43:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-02-07 14:43:03,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-02-07 14:43:03,724 INFO L175 Difference]: Start difference. First operand has 74 places, 56 transitions, 492 flow. Second operand 9 states and 120 transitions. [2024-02-07 14:43:03,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 97 transitions, 812 flow [2024-02-07 14:43:03,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 769 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:03,731 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 496 flow [2024-02-07 14:43:03,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=496, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2024-02-07 14:43:03,732 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2024-02-07 14:43:03,732 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 496 flow [2024-02-07 14:43:03,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:03,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:03,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:03,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 14:43:03,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:03,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:03,734 INFO L85 PathProgramCache]: Analyzing trace with hash -396713507, now seen corresponding path program 3 times [2024-02-07 14:43:03,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:03,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628770639] [2024-02-07 14:43:03,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:03,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:03,870 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 14:43:03,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:03,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628770639] [2024-02-07 14:43:03,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628770639] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:03,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:03,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:43:03,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820937598] [2024-02-07 14:43:03,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:03,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:03,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:43:03,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 14:43:03,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 496 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:03,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:03,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 14:43:03,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:04,065 INFO L124 PetriNetUnfolderBase]: 213/461 cut-off events. [2024-02-07 14:43:04,065 INFO L125 PetriNetUnfolderBase]: For 888/888 co-relation queries the response was YES. [2024-02-07 14:43:04,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1800 conditions, 461 events. 213/461 cut-off events. For 888/888 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2112 event pairs, 85 based on Foata normal form. 2/419 useless extension candidates. Maximal degree in co-relation 1752. Up to 148 conditions per place. [2024-02-07 14:43:04,069 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 51 selfloop transitions, 19 changer transitions 14/85 dead transitions. [2024-02-07 14:43:04,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 85 transitions, 760 flow [2024-02-07 14:43:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:04,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-02-07 14:43:04,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879032258064516 [2024-02-07 14:43:04,070 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 496 flow. Second operand 8 states and 121 transitions. [2024-02-07 14:43:04,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 85 transitions, 760 flow [2024-02-07 14:43:04,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 85 transitions, 696 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:04,077 INFO L231 Difference]: Finished difference. Result has 79 places, 49 transitions, 419 flow [2024-02-07 14:43:04,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=419, PETRI_PLACES=79, PETRI_TRANSITIONS=49} [2024-02-07 14:43:04,077 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2024-02-07 14:43:04,078 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 49 transitions, 419 flow [2024-02-07 14:43:04,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:04,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:04,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:04,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 14:43:04,079 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:04,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:04,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1488183740, now seen corresponding path program 4 times [2024-02-07 14:43:04,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:04,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908974945] [2024-02-07 14:43:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:04,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:04,225 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 14:43:04,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:04,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908974945] [2024-02-07 14:43:04,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908974945] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:04,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:04,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:04,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471244392] [2024-02-07 14:43:04,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:04,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:04,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:04,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:04,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:04,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:04,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 49 transitions, 419 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:04,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:04,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:04,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:04,448 INFO L124 PetriNetUnfolderBase]: 209/448 cut-off events. [2024-02-07 14:43:04,448 INFO L125 PetriNetUnfolderBase]: For 752/752 co-relation queries the response was YES. [2024-02-07 14:43:04,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1704 conditions, 448 events. 209/448 cut-off events. For 752/752 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2004 event pairs, 21 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 1662. Up to 162 conditions per place. [2024-02-07 14:43:04,452 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 51 selfloop transitions, 24 changer transitions 13/89 dead transitions. [2024-02-07 14:43:04,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 89 transitions, 718 flow [2024-02-07 14:43:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-02-07 14:43:04,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-02-07 14:43:04,454 INFO L175 Difference]: Start difference. First operand has 79 places, 49 transitions, 419 flow. Second operand 10 states and 122 transitions. [2024-02-07 14:43:04,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 89 transitions, 718 flow [2024-02-07 14:43:04,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 681 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-02-07 14:43:04,460 INFO L231 Difference]: Finished difference. Result has 81 places, 49 transitions, 456 flow [2024-02-07 14:43:04,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=456, PETRI_PLACES=81, PETRI_TRANSITIONS=49} [2024-02-07 14:43:04,461 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2024-02-07 14:43:04,461 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 49 transitions, 456 flow [2024-02-07 14:43:04,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:04,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:04,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:04,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 14:43:04,462 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:04,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:04,462 INFO L85 PathProgramCache]: Analyzing trace with hash -437102862, now seen corresponding path program 5 times [2024-02-07 14:43:04,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:04,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938158324] [2024-02-07 14:43:04,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:04,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:04,626 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 14:43:04,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:04,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938158324] [2024-02-07 14:43:04,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938158324] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:04,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:04,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:04,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132072937] [2024-02-07 14:43:04,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:04,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:04,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:04,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:04,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 49 transitions, 456 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:04,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:04,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:04,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:04,848 INFO L124 PetriNetUnfolderBase]: 192/408 cut-off events. [2024-02-07 14:43:04,848 INFO L125 PetriNetUnfolderBase]: For 847/847 co-relation queries the response was YES. [2024-02-07 14:43:04,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 408 events. 192/408 cut-off events. For 847/847 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1757 event pairs, 79 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 1628. Up to 148 conditions per place. [2024-02-07 14:43:04,852 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 54 selfloop transitions, 20 changer transitions 14/89 dead transitions. [2024-02-07 14:43:04,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 745 flow [2024-02-07 14:43:04,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-02-07 14:43:04,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-02-07 14:43:04,854 INFO L175 Difference]: Start difference. First operand has 81 places, 49 transitions, 456 flow. Second operand 10 states and 127 transitions. [2024-02-07 14:43:04,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 745 flow [2024-02-07 14:43:04,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 89 transitions, 712 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:04,860 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 450 flow [2024-02-07 14:43:04,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=450, PETRI_PLACES=84, PETRI_TRANSITIONS=47} [2024-02-07 14:43:04,861 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 51 predicate places. [2024-02-07 14:43:04,861 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 450 flow [2024-02-07 14:43:04,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:04,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:04,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:04,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 14:43:04,862 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:04,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1523616886, now seen corresponding path program 6 times [2024-02-07 14:43:04,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:04,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30291899] [2024-02-07 14:43:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:04,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:05,011 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 14:43:05,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:05,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30291899] [2024-02-07 14:43:05,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30291899] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:05,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:05,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:05,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226283486] [2024-02-07 14:43:05,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:05,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:05,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:05,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:05,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:05,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:05,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 47 transitions, 450 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:05,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:05,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:05,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:05,250 INFO L124 PetriNetUnfolderBase]: 175/368 cut-off events. [2024-02-07 14:43:05,251 INFO L125 PetriNetUnfolderBase]: For 821/821 co-relation queries the response was YES. [2024-02-07 14:43:05,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1553 conditions, 368 events. 175/368 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1509 event pairs, 79 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1514. Up to 148 conditions per place. [2024-02-07 14:43:05,254 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 43 selfloop transitions, 16 changer transitions 17/77 dead transitions. [2024-02-07 14:43:05,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 77 transitions, 684 flow [2024-02-07 14:43:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:43:05,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:43:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-02-07 14:43:05,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-02-07 14:43:05,256 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 450 flow. Second operand 9 states and 110 transitions. [2024-02-07 14:43:05,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 77 transitions, 684 flow [2024-02-07 14:43:05,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 624 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-02-07 14:43:05,262 INFO L231 Difference]: Finished difference. Result has 80 places, 42 transitions, 375 flow [2024-02-07 14:43:05,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=375, PETRI_PLACES=80, PETRI_TRANSITIONS=42} [2024-02-07 14:43:05,262 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 47 predicate places. [2024-02-07 14:43:05,262 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 42 transitions, 375 flow [2024-02-07 14:43:05,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:05,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:05,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:05,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 14:43:05,263 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:05,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2144620339, now seen corresponding path program 4 times [2024-02-07 14:43:05,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:05,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528638850] [2024-02-07 14:43:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:05,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:05,395 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 14:43:05,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:05,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528638850] [2024-02-07 14:43:05,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528638850] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:05,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:05,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:43:05,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884092772] [2024-02-07 14:43:05,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:05,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:05,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:05,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:05,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:43:05,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 14:43:05,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 42 transitions, 375 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:05,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:05,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 14:43:05,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:05,584 INFO L124 PetriNetUnfolderBase]: 166/347 cut-off events. [2024-02-07 14:43:05,584 INFO L125 PetriNetUnfolderBase]: For 666/666 co-relation queries the response was YES. [2024-02-07 14:43:05,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1429 conditions, 347 events. 166/347 cut-off events. For 666/666 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1376 event pairs, 73 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1393. Up to 144 conditions per place. [2024-02-07 14:43:05,587 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 53 selfloop transitions, 14 changer transitions 8/76 dead transitions. [2024-02-07 14:43:05,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 623 flow [2024-02-07 14:43:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:05,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-02-07 14:43:05,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49193548387096775 [2024-02-07 14:43:05,589 INFO L175 Difference]: Start difference. First operand has 80 places, 42 transitions, 375 flow. Second operand 8 states and 122 transitions. [2024-02-07 14:43:05,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 623 flow [2024-02-07 14:43:05,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 566 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:05,594 INFO L231 Difference]: Finished difference. Result has 73 places, 42 transitions, 346 flow [2024-02-07 14:43:05,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=73, PETRI_TRANSITIONS=42} [2024-02-07 14:43:05,594 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 40 predicate places. [2024-02-07 14:43:05,595 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 42 transitions, 346 flow [2024-02-07 14:43:05,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:05,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:05,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:05,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-07 14:43:05,596 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:05,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash -378704953, now seen corresponding path program 5 times [2024-02-07 14:43:05,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:05,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844580900] [2024-02-07 14:43:05,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:05,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:05,749 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 14:43:05,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:05,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844580900] [2024-02-07 14:43:05,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844580900] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:05,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:05,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 14:43:05,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475701386] [2024-02-07 14:43:05,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:05,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 14:43:05,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:05,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 14:43:05,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-07 14:43:05,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 14:43:05,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 42 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:05,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:05,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 14:43:05,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:05,927 INFO L124 PetriNetUnfolderBase]: 164/336 cut-off events. [2024-02-07 14:43:05,927 INFO L125 PetriNetUnfolderBase]: For 593/593 co-relation queries the response was YES. [2024-02-07 14:43:05,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 336 events. 164/336 cut-off events. For 593/593 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1303 event pairs, 73 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 1293. Up to 144 conditions per place. [2024-02-07 14:43:05,930 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 48 selfloop transitions, 12 changer transitions 11/72 dead transitions. [2024-02-07 14:43:05,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 563 flow [2024-02-07 14:43:05,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-02-07 14:43:05,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-02-07 14:43:05,932 INFO L175 Difference]: Start difference. First operand has 73 places, 42 transitions, 346 flow. Second operand 8 states and 120 transitions. [2024-02-07 14:43:05,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 563 flow [2024-02-07 14:43:05,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 531 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-02-07 14:43:05,936 INFO L231 Difference]: Finished difference. Result has 74 places, 39 transitions, 300 flow [2024-02-07 14:43:05,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=300, PETRI_PLACES=74, PETRI_TRANSITIONS=39} [2024-02-07 14:43:05,936 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 41 predicate places. [2024-02-07 14:43:05,937 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 39 transitions, 300 flow [2024-02-07 14:43:05,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 14:43:05,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:05,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:05,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-07 14:43:05,937 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:05,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1402573638, now seen corresponding path program 7 times [2024-02-07 14:43:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:05,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371231653] [2024-02-07 14:43:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:06,117 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 14:43:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:06,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371231653] [2024-02-07 14:43:06,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371231653] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:06,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:06,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:06,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091256797] [2024-02-07 14:43:06,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:06,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:06,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:06,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:06,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:06,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 39 transitions, 300 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:06,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:06,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:06,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:06,366 INFO L124 PetriNetUnfolderBase]: 160/328 cut-off events. [2024-02-07 14:43:06,366 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2024-02-07 14:43:06,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1267 conditions, 328 events. 160/328 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1265 event pairs, 12 based on Foata normal form. 1/295 useless extension candidates. Maximal degree in co-relation 1237. Up to 115 conditions per place. [2024-02-07 14:43:06,369 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 55 selfloop transitions, 16 changer transitions 7/79 dead transitions. [2024-02-07 14:43:06,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 563 flow [2024-02-07 14:43:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-02-07 14:43:06,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-02-07 14:43:06,372 INFO L175 Difference]: Start difference. First operand has 74 places, 39 transitions, 300 flow. Second operand 11 states and 129 transitions. [2024-02-07 14:43:06,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 563 flow [2024-02-07 14:43:06,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 79 transitions, 534 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-02-07 14:43:06,376 INFO L231 Difference]: Finished difference. Result has 76 places, 39 transitions, 313 flow [2024-02-07 14:43:06,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=313, PETRI_PLACES=76, PETRI_TRANSITIONS=39} [2024-02-07 14:43:06,377 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 43 predicate places. [2024-02-07 14:43:06,378 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 39 transitions, 313 flow [2024-02-07 14:43:06,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:06,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:06,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:06,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-07 14:43:06,379 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:06,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:06,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1661075474, now seen corresponding path program 8 times [2024-02-07 14:43:06,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:06,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888539728] [2024-02-07 14:43:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:06,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:06,529 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 14:43:06,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888539728] [2024-02-07 14:43:06,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888539728] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:06,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:06,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864203221] [2024-02-07 14:43:06,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:06,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:06,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:06,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:06,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:06,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 39 transitions, 313 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:06,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:06,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:06,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:06,768 INFO L124 PetriNetUnfolderBase]: 158/326 cut-off events. [2024-02-07 14:43:06,768 INFO L125 PetriNetUnfolderBase]: For 623/623 co-relation queries the response was YES. [2024-02-07 14:43:06,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 326 events. 158/326 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1259 event pairs, 16 based on Foata normal form. 1/293 useless extension candidates. Maximal degree in co-relation 1271. Up to 87 conditions per place. [2024-02-07 14:43:06,771 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 45 selfloop transitions, 19 changer transitions 8/73 dead transitions. [2024-02-07 14:43:06,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 544 flow [2024-02-07 14:43:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-02-07 14:43:06,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-02-07 14:43:06,773 INFO L175 Difference]: Start difference. First operand has 76 places, 39 transitions, 313 flow. Second operand 10 states and 115 transitions. [2024-02-07 14:43:06,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 544 flow [2024-02-07 14:43:06,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 73 transitions, 503 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:06,780 INFO L231 Difference]: Finished difference. Result has 78 places, 38 transitions, 302 flow [2024-02-07 14:43:06,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=302, PETRI_PLACES=78, PETRI_TRANSITIONS=38} [2024-02-07 14:43:06,782 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 45 predicate places. [2024-02-07 14:43:06,782 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 38 transitions, 302 flow [2024-02-07 14:43:06,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:06,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:06,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:06,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-07 14:43:06,783 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:06,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash 104839912, now seen corresponding path program 9 times [2024-02-07 14:43:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:06,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988925201] [2024-02-07 14:43:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:06,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:06,929 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 14:43:06,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:06,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988925201] [2024-02-07 14:43:06,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988925201] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:06,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:06,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:06,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302697518] [2024-02-07 14:43:06,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:06,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:06,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:06,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:06,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:06,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:06,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 38 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:06,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:06,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:06,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:07,144 INFO L124 PetriNetUnfolderBase]: 156/315 cut-off events. [2024-02-07 14:43:07,144 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2024-02-07 14:43:07,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 315 events. 156/315 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1182 event pairs, 18 based on Foata normal form. 1/282 useless extension candidates. Maximal degree in co-relation 1249. Up to 100 conditions per place. [2024-02-07 14:43:07,147 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 42 selfloop transitions, 15 changer transitions 11/69 dead transitions. [2024-02-07 14:43:07,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 69 transitions, 511 flow [2024-02-07 14:43:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-02-07 14:43:07,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-02-07 14:43:07,149 INFO L175 Difference]: Start difference. First operand has 78 places, 38 transitions, 302 flow. Second operand 10 states and 113 transitions. [2024-02-07 14:43:07,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 69 transitions, 511 flow [2024-02-07 14:43:07,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 69 transitions, 452 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-02-07 14:43:07,153 INFO L231 Difference]: Finished difference. Result has 75 places, 35 transitions, 244 flow [2024-02-07 14:43:07,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=244, PETRI_PLACES=75, PETRI_TRANSITIONS=35} [2024-02-07 14:43:07,154 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2024-02-07 14:43:07,154 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 35 transitions, 244 flow [2024-02-07 14:43:07,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:07,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:07,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-07 14:43:07,155 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:07,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:07,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1363110848, now seen corresponding path program 10 times [2024-02-07 14:43:07,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:07,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485772019] [2024-02-07 14:43:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:07,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:07,298 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 14:43:07,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:07,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485772019] [2024-02-07 14:43:07,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485772019] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:07,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:07,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:07,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107192822] [2024-02-07 14:43:07,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:07,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:07,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:07,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:07,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:07,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:07,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 35 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:07,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:07,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:07,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:07,479 INFO L124 PetriNetUnfolderBase]: 153/301 cut-off events. [2024-02-07 14:43:07,480 INFO L125 PetriNetUnfolderBase]: For 477/477 co-relation queries the response was YES. [2024-02-07 14:43:07,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1158 conditions, 301 events. 153/301 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1085 event pairs, 12 based on Foata normal form. 1/268 useless extension candidates. Maximal degree in co-relation 1139. Up to 115 conditions per place. [2024-02-07 14:43:07,482 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 35 selfloop transitions, 9 changer transitions 18/63 dead transitions. [2024-02-07 14:43:07,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 433 flow [2024-02-07 14:43:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:43:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:43:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-02-07 14:43:07,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-02-07 14:43:07,484 INFO L175 Difference]: Start difference. First operand has 75 places, 35 transitions, 244 flow. Second operand 9 states and 104 transitions. [2024-02-07 14:43:07,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 433 flow [2024-02-07 14:43:07,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 405 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-02-07 14:43:07,487 INFO L231 Difference]: Finished difference. Result has 70 places, 30 transitions, 193 flow [2024-02-07 14:43:07,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=193, PETRI_PLACES=70, PETRI_TRANSITIONS=30} [2024-02-07 14:43:07,488 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 37 predicate places. [2024-02-07 14:43:07,488 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 30 transitions, 193 flow [2024-02-07 14:43:07,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:07,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:07,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-02-07 14:43:07,489 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:07,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:07,490 INFO L85 PathProgramCache]: Analyzing trace with hash 947168326, now seen corresponding path program 1 times [2024-02-07 14:43:07,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:07,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325177961] [2024-02-07 14:43:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:07,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:07,642 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 14:43:07,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:07,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325177961] [2024-02-07 14:43:07,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325177961] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:07,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:07,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:07,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325932753] [2024-02-07 14:43:07,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:07,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:07,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:07,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:07,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:07,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:07,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 30 transitions, 193 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:07,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:07,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:07,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:07,852 INFO L124 PetriNetUnfolderBase]: 122/255 cut-off events. [2024-02-07 14:43:07,852 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2024-02-07 14:43:07,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 255 events. 122/255 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 971 event pairs, 7 based on Foata normal form. 1/244 useless extension candidates. Maximal degree in co-relation 968. Up to 82 conditions per place. [2024-02-07 14:43:07,855 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 51 selfloop transitions, 19 changer transitions 6/77 dead transitions. [2024-02-07 14:43:07,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 575 flow [2024-02-07 14:43:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-02-07 14:43:07,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-02-07 14:43:07,856 INFO L175 Difference]: Start difference. First operand has 70 places, 30 transitions, 193 flow. Second operand 11 states and 125 transitions. [2024-02-07 14:43:07,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 575 flow [2024-02-07 14:43:07,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 492 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-02-07 14:43:07,859 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 287 flow [2024-02-07 14:43:07,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=287, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2024-02-07 14:43:07,860 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 26 predicate places. [2024-02-07 14:43:07,860 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 287 flow [2024-02-07 14:43:07,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:07,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:07,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:07,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-02-07 14:43:07,861 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:07,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1598817516, now seen corresponding path program 2 times [2024-02-07 14:43:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:07,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893597396] [2024-02-07 14:43:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:07,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,015 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 14:43:08,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893597396] [2024-02-07 14:43:08,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893597396] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:08,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:08,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:08,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940899373] [2024-02-07 14:43:08,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:08,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:08,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:08,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:08,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 287 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:08,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:08,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,236 INFO L124 PetriNetUnfolderBase]: 133/296 cut-off events. [2024-02-07 14:43:08,236 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-02-07 14:43:08,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 296 events. 133/296 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1160 event pairs, 51 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1189. Up to 98 conditions per place. [2024-02-07 14:43:08,239 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 56 selfloop transitions, 22 changer transitions 6/85 dead transitions. [2024-02-07 14:43:08,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 640 flow [2024-02-07 14:43:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:08,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-02-07 14:43:08,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-02-07 14:43:08,240 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 287 flow. Second operand 11 states and 131 transitions. [2024-02-07 14:43:08,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 640 flow [2024-02-07 14:43:08,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 85 transitions, 611 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-02-07 14:43:08,244 INFO L231 Difference]: Finished difference. Result has 72 places, 46 transitions, 415 flow [2024-02-07 14:43:08,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=415, PETRI_PLACES=72, PETRI_TRANSITIONS=46} [2024-02-07 14:43:08,245 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2024-02-07 14:43:08,245 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 46 transitions, 415 flow [2024-02-07 14:43:08,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:08,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:08,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:08,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-02-07 14:43:08,246 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:08,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1103178148, now seen corresponding path program 3 times [2024-02-07 14:43:08,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964709672] [2024-02-07 14:43:08,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,408 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 14:43:08,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964709672] [2024-02-07 14:43:08,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964709672] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:08,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:08,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592982209] [2024-02-07 14:43:08,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:08,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:08,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:08,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 46 transitions, 415 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:08,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:08,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,622 INFO L124 PetriNetUnfolderBase]: 133/298 cut-off events. [2024-02-07 14:43:08,622 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-02-07 14:43:08,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 298 events. 133/298 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1246 event pairs, 11 based on Foata normal form. 1/287 useless extension candidates. Maximal degree in co-relation 1288. Up to 107 conditions per place. [2024-02-07 14:43:08,624 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 44 selfloop transitions, 23 changer transitions 10/78 dead transitions. [2024-02-07 14:43:08,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 78 transitions, 666 flow [2024-02-07 14:43:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-02-07 14:43:08,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-02-07 14:43:08,626 INFO L175 Difference]: Start difference. First operand has 72 places, 46 transitions, 415 flow. Second operand 10 states and 112 transitions. [2024-02-07 14:43:08,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 78 transitions, 666 flow [2024-02-07 14:43:08,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 631 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-02-07 14:43:08,630 INFO L231 Difference]: Finished difference. Result has 77 places, 45 transitions, 417 flow [2024-02-07 14:43:08,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=417, PETRI_PLACES=77, PETRI_TRANSITIONS=45} [2024-02-07 14:43:08,631 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 44 predicate places. [2024-02-07 14:43:08,631 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 45 transitions, 417 flow [2024-02-07 14:43:08,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:08,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:08,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:08,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-02-07 14:43:08,632 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:08,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1486524048, now seen corresponding path program 4 times [2024-02-07 14:43:08,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:08,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621022050] [2024-02-07 14:43:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:08,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:08,789 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 14:43:08,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:08,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621022050] [2024-02-07 14:43:08,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621022050] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:08,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:08,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:08,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144070769] [2024-02-07 14:43:08,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:08,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:08,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:08,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 45 transitions, 417 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:08,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:08,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:08,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:08,994 INFO L124 PetriNetUnfolderBase]: 126/296 cut-off events. [2024-02-07 14:43:08,995 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2024-02-07 14:43:08,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1318 conditions, 296 events. 126/296 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1275 event pairs, 9 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1278. Up to 105 conditions per place. [2024-02-07 14:43:08,997 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 57 selfloop transitions, 22 changer transitions 7/87 dead transitions. [2024-02-07 14:43:08,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 87 transitions, 724 flow [2024-02-07 14:43:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-02-07 14:43:08,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-02-07 14:43:08,999 INFO L175 Difference]: Start difference. First operand has 77 places, 45 transitions, 417 flow. Second operand 11 states and 130 transitions. [2024-02-07 14:43:08,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 87 transitions, 724 flow [2024-02-07 14:43:09,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 642 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-02-07 14:43:09,005 INFO L231 Difference]: Finished difference. Result has 81 places, 47 transitions, 432 flow [2024-02-07 14:43:09,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=432, PETRI_PLACES=81, PETRI_TRANSITIONS=47} [2024-02-07 14:43:09,005 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2024-02-07 14:43:09,005 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 47 transitions, 432 flow [2024-02-07 14:43:09,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:09,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:09,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:09,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-02-07 14:43:09,007 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:09,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:09,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1428637680, now seen corresponding path program 5 times [2024-02-07 14:43:09,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:09,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549775973] [2024-02-07 14:43:09,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:09,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:09,161 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 14:43:09,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:09,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549775973] [2024-02-07 14:43:09,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549775973] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:09,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:09,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:09,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807880573] [2024-02-07 14:43:09,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:09,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:09,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:09,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:09,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:09,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:09,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 47 transitions, 432 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:09,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:09,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:09,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:09,406 INFO L124 PetriNetUnfolderBase]: 124/285 cut-off events. [2024-02-07 14:43:09,406 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2024-02-07 14:43:09,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 285 events. 124/285 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1189 event pairs, 11 based on Foata normal form. 1/272 useless extension candidates. Maximal degree in co-relation 1242. Up to 109 conditions per place. [2024-02-07 14:43:09,409 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 41 selfloop transitions, 22 changer transitions 13/77 dead transitions. [2024-02-07 14:43:09,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 77 transitions, 660 flow [2024-02-07 14:43:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-02-07 14:43:09,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-02-07 14:43:09,411 INFO L175 Difference]: Start difference. First operand has 81 places, 47 transitions, 432 flow. Second operand 10 states and 112 transitions. [2024-02-07 14:43:09,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 77 transitions, 660 flow [2024-02-07 14:43:09,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 632 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:09,415 INFO L231 Difference]: Finished difference. Result has 84 places, 44 transitions, 405 flow [2024-02-07 14:43:09,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=405, PETRI_PLACES=84, PETRI_TRANSITIONS=44} [2024-02-07 14:43:09,416 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 51 predicate places. [2024-02-07 14:43:09,416 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 44 transitions, 405 flow [2024-02-07 14:43:09,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:09,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:09,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:09,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-02-07 14:43:09,417 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:09,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:09,418 INFO L85 PathProgramCache]: Analyzing trace with hash -768670219, now seen corresponding path program 1 times [2024-02-07 14:43:09,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:09,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267462012] [2024-02-07 14:43:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:09,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:09,563 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 14:43:09,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:09,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267462012] [2024-02-07 14:43:09,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267462012] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:09,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:09,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:09,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146167667] [2024-02-07 14:43:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:09,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:09,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:09,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:09,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:09,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 44 transitions, 405 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:09,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:09,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:09,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:09,854 INFO L124 PetriNetUnfolderBase]: 132/319 cut-off events. [2024-02-07 14:43:09,854 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-02-07 14:43:09,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1435 conditions, 319 events. 132/319 cut-off events. For 676/676 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1383 event pairs, 11 based on Foata normal form. 1/304 useless extension candidates. Maximal degree in co-relation 1392. Up to 71 conditions per place. [2024-02-07 14:43:09,866 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 53 selfloop transitions, 30 changer transitions 7/91 dead transitions. [2024-02-07 14:43:09,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 791 flow [2024-02-07 14:43:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:43:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:43:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 114 transitions. [2024-02-07 14:43:09,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28287841191067 [2024-02-07 14:43:09,869 INFO L175 Difference]: Start difference. First operand has 84 places, 44 transitions, 405 flow. Second operand 13 states and 114 transitions. [2024-02-07 14:43:09,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 791 flow [2024-02-07 14:43:09,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 735 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:09,875 INFO L231 Difference]: Finished difference. Result has 90 places, 50 transitions, 532 flow [2024-02-07 14:43:09,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=532, PETRI_PLACES=90, PETRI_TRANSITIONS=50} [2024-02-07 14:43:09,875 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 57 predicate places. [2024-02-07 14:43:09,876 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 50 transitions, 532 flow [2024-02-07 14:43:09,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:09,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:09,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:09,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-02-07 14:43:09,876 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:09,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:09,877 INFO L85 PathProgramCache]: Analyzing trace with hash -346024523, now seen corresponding path program 2 times [2024-02-07 14:43:09,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:09,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949500002] [2024-02-07 14:43:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:09,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:10,019 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 14:43:10,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:10,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949500002] [2024-02-07 14:43:10,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949500002] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:10,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:10,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471823003] [2024-02-07 14:43:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:10,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:10,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:10,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:10,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 50 transitions, 532 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:10,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:10,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:10,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:10,295 INFO L124 PetriNetUnfolderBase]: 153/371 cut-off events. [2024-02-07 14:43:10,296 INFO L125 PetriNetUnfolderBase]: For 895/895 co-relation queries the response was YES. [2024-02-07 14:43:10,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1780 conditions, 371 events. 153/371 cut-off events. For 895/895 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1771 event pairs, 17 based on Foata normal form. 1/350 useless extension candidates. Maximal degree in co-relation 1728. Up to 129 conditions per place. [2024-02-07 14:43:10,299 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 55 selfloop transitions, 34 changer transitions 10/100 dead transitions. [2024-02-07 14:43:10,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 925 flow [2024-02-07 14:43:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:43:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:43:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2024-02-07 14:43:10,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29280397022332505 [2024-02-07 14:43:10,300 INFO L175 Difference]: Start difference. First operand has 90 places, 50 transitions, 532 flow. Second operand 13 states and 118 transitions. [2024-02-07 14:43:10,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 925 flow [2024-02-07 14:43:10,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 100 transitions, 862 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-02-07 14:43:10,307 INFO L231 Difference]: Finished difference. Result has 100 places, 56 transitions, 644 flow [2024-02-07 14:43:10,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=644, PETRI_PLACES=100, PETRI_TRANSITIONS=56} [2024-02-07 14:43:10,311 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 67 predicate places. [2024-02-07 14:43:10,311 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 56 transitions, 644 flow [2024-02-07 14:43:10,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:10,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:10,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:10,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-02-07 14:43:10,312 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:10,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:10,312 INFO L85 PathProgramCache]: Analyzing trace with hash 606249431, now seen corresponding path program 3 times [2024-02-07 14:43:10,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:10,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553025013] [2024-02-07 14:43:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:10,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:10,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553025013] [2024-02-07 14:43:10,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553025013] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:10,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:10,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:10,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508810185] [2024-02-07 14:43:10,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:10,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:10,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:10,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:10,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:10,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:10,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 56 transitions, 644 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:10,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:10,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:10,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:10,801 INFO L124 PetriNetUnfolderBase]: 221/533 cut-off events. [2024-02-07 14:43:10,801 INFO L125 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2024-02-07 14:43:10,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2668 conditions, 533 events. 221/533 cut-off events. For 1435/1435 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2817 event pairs, 29 based on Foata normal form. 2/501 useless extension candidates. Maximal degree in co-relation 2600. Up to 139 conditions per place. [2024-02-07 14:43:10,805 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 73 selfloop transitions, 37 changer transitions 11/122 dead transitions. [2024-02-07 14:43:10,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 122 transitions, 1300 flow [2024-02-07 14:43:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:43:10,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:43:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 129 transitions. [2024-02-07 14:43:10,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3200992555831266 [2024-02-07 14:43:10,810 INFO L175 Difference]: Start difference. First operand has 100 places, 56 transitions, 644 flow. Second operand 13 states and 129 transitions. [2024-02-07 14:43:10,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 122 transitions, 1300 flow [2024-02-07 14:43:10,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 122 transitions, 1212 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-02-07 14:43:10,817 INFO L231 Difference]: Finished difference. Result has 112 places, 70 transitions, 921 flow [2024-02-07 14:43:10,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=921, PETRI_PLACES=112, PETRI_TRANSITIONS=70} [2024-02-07 14:43:10,819 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 79 predicate places. [2024-02-07 14:43:10,820 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 70 transitions, 921 flow [2024-02-07 14:43:10,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:10,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:10,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:10,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-02-07 14:43:10,820 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:10,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:10,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1354648332, now seen corresponding path program 6 times [2024-02-07 14:43:10,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:10,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446012816] [2024-02-07 14:43:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:10,959 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 14:43:10,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:10,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446012816] [2024-02-07 14:43:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446012816] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:10,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:10,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:10,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379428598] [2024-02-07 14:43:10,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:10,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:10,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:10,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:10,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 70 transitions, 921 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:10,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:10,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:10,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:11,182 INFO L124 PetriNetUnfolderBase]: 212/500 cut-off events. [2024-02-07 14:43:11,182 INFO L125 PetriNetUnfolderBase]: For 1794/1794 co-relation queries the response was YES. [2024-02-07 14:43:11,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2690 conditions, 500 events. 212/500 cut-off events. For 1794/1794 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2574 event pairs, 37 based on Foata normal form. 2/470 useless extension candidates. Maximal degree in co-relation 2624. Up to 244 conditions per place. [2024-02-07 14:43:11,187 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 59 selfloop transitions, 28 changer transitions 14/102 dead transitions. [2024-02-07 14:43:11,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 102 transitions, 1219 flow [2024-02-07 14:43:11,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:11,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-02-07 14:43:11,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-02-07 14:43:11,190 INFO L175 Difference]: Start difference. First operand has 112 places, 70 transitions, 921 flow. Second operand 10 states and 114 transitions. [2024-02-07 14:43:11,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 102 transitions, 1219 flow [2024-02-07 14:43:11,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 102 transitions, 1193 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-02-07 14:43:11,199 INFO L231 Difference]: Finished difference. Result has 118 places, 65 transitions, 867 flow [2024-02-07 14:43:11,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=867, PETRI_PLACES=118, PETRI_TRANSITIONS=65} [2024-02-07 14:43:11,200 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 85 predicate places. [2024-02-07 14:43:11,200 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 65 transitions, 867 flow [2024-02-07 14:43:11,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:11,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:11,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:11,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-02-07 14:43:11,201 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:11,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash -548307953, now seen corresponding path program 4 times [2024-02-07 14:43:11,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:11,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567119534] [2024-02-07 14:43:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:11,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:11,346 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 14:43:11,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:11,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567119534] [2024-02-07 14:43:11,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567119534] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:11,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:11,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:11,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088290491] [2024-02-07 14:43:11,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:11,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:11,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:11,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:11,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 65 transitions, 867 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:11,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:11,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:11,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:11,695 INFO L124 PetriNetUnfolderBase]: 203/496 cut-off events. [2024-02-07 14:43:11,695 INFO L125 PetriNetUnfolderBase]: For 1880/1880 co-relation queries the response was YES. [2024-02-07 14:43:11,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2650 conditions, 496 events. 203/496 cut-off events. For 1880/1880 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2623 event pairs, 15 based on Foata normal form. 1/463 useless extension candidates. Maximal degree in co-relation 2576. Up to 143 conditions per place. [2024-02-07 14:43:11,699 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 77 selfloop transitions, 36 changer transitions 11/125 dead transitions. [2024-02-07 14:43:11,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 125 transitions, 1361 flow [2024-02-07 14:43:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:43:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:43:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 136 transitions. [2024-02-07 14:43:11,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.337468982630273 [2024-02-07 14:43:11,703 INFO L175 Difference]: Start difference. First operand has 118 places, 65 transitions, 867 flow. Second operand 13 states and 136 transitions. [2024-02-07 14:43:11,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 125 transitions, 1361 flow [2024-02-07 14:43:11,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 125 transitions, 1296 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:11,712 INFO L231 Difference]: Finished difference. Result has 125 places, 70 transitions, 992 flow [2024-02-07 14:43:11,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=992, PETRI_PLACES=125, PETRI_TRANSITIONS=70} [2024-02-07 14:43:11,713 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2024-02-07 14:43:11,713 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 70 transitions, 992 flow [2024-02-07 14:43:11,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:11,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:11,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:11,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-02-07 14:43:11,714 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:11,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -377910413, now seen corresponding path program 5 times [2024-02-07 14:43:11,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:11,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405172535] [2024-02-07 14:43:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:11,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:11,883 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 14:43:11,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:11,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405172535] [2024-02-07 14:43:11,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405172535] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:11,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:11,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:11,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280613707] [2024-02-07 14:43:11,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:11,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:11,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:11,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:11,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:11,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 70 transitions, 992 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:11,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:11,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:11,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:12,164 INFO L124 PetriNetUnfolderBase]: 210/515 cut-off events. [2024-02-07 14:43:12,164 INFO L125 PetriNetUnfolderBase]: For 2142/2142 co-relation queries the response was YES. [2024-02-07 14:43:12,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2857 conditions, 515 events. 210/515 cut-off events. For 2142/2142 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2760 event pairs, 37 based on Foata normal form. 1/480 useless extension candidates. Maximal degree in co-relation 2780. Up to 218 conditions per place. [2024-02-07 14:43:12,169 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 45 selfloop transitions, 39 changer transitions 20/105 dead transitions. [2024-02-07 14:43:12,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 105 transitions, 1306 flow [2024-02-07 14:43:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 99 transitions. [2024-02-07 14:43:12,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2024-02-07 14:43:12,171 INFO L175 Difference]: Start difference. First operand has 125 places, 70 transitions, 992 flow. Second operand 11 states and 99 transitions. [2024-02-07 14:43:12,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 105 transitions, 1306 flow [2024-02-07 14:43:12,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 105 transitions, 1246 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:12,183 INFO L231 Difference]: Finished difference. Result has 129 places, 68 transitions, 988 flow [2024-02-07 14:43:12,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=988, PETRI_PLACES=129, PETRI_TRANSITIONS=68} [2024-02-07 14:43:12,185 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 96 predicate places. [2024-02-07 14:43:12,185 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 68 transitions, 988 flow [2024-02-07 14:43:12,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:12,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:12,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:12,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-02-07 14:43:12,186 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:12,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:12,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1152917385, now seen corresponding path program 6 times [2024-02-07 14:43:12,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:12,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323414795] [2024-02-07 14:43:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:12,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:12,329 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 14:43:12,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323414795] [2024-02-07 14:43:12,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323414795] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:12,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:12,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493569206] [2024-02-07 14:43:12,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:12,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:12,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:12,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:12,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 68 transitions, 988 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:12,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:12,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:12,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:12,607 INFO L124 PetriNetUnfolderBase]: 194/481 cut-off events. [2024-02-07 14:43:12,607 INFO L125 PetriNetUnfolderBase]: For 1916/1916 co-relation queries the response was YES. [2024-02-07 14:43:12,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2749 conditions, 481 events. 194/481 cut-off events. For 1916/1916 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2526 event pairs, 35 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 2675. Up to 190 conditions per place. [2024-02-07 14:43:12,617 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 52 selfloop transitions, 36 changer transitions 15/104 dead transitions. [2024-02-07 14:43:12,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 104 transitions, 1297 flow [2024-02-07 14:43:12,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-02-07 14:43:12,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020527859237537 [2024-02-07 14:43:12,619 INFO L175 Difference]: Start difference. First operand has 129 places, 68 transitions, 988 flow. Second operand 11 states and 103 transitions. [2024-02-07 14:43:12,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 104 transitions, 1297 flow [2024-02-07 14:43:12,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 104 transitions, 1216 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-02-07 14:43:12,629 INFO L231 Difference]: Finished difference. Result has 127 places, 66 transitions, 954 flow [2024-02-07 14:43:12,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=954, PETRI_PLACES=127, PETRI_TRANSITIONS=66} [2024-02-07 14:43:12,629 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 94 predicate places. [2024-02-07 14:43:12,629 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 66 transitions, 954 flow [2024-02-07 14:43:12,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:12,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:12,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:12,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-02-07 14:43:12,630 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:12,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash -41961687, now seen corresponding path program 7 times [2024-02-07 14:43:12,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:12,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533463145] [2024-02-07 14:43:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:12,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:12,761 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 14:43:12,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:12,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533463145] [2024-02-07 14:43:12,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533463145] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:12,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:12,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:12,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264409329] [2024-02-07 14:43:12,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:12,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:12,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:12,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:12,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 66 transitions, 954 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:12,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:12,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:12,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:13,030 INFO L124 PetriNetUnfolderBase]: 177/441 cut-off events. [2024-02-07 14:43:13,030 INFO L125 PetriNetUnfolderBase]: For 1767/1767 co-relation queries the response was YES. [2024-02-07 14:43:13,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 441 events. 177/441 cut-off events. For 1767/1767 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2243 event pairs, 33 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 2496. Up to 190 conditions per place. [2024-02-07 14:43:13,034 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 41 selfloop transitions, 34 changer transitions 19/95 dead transitions. [2024-02-07 14:43:13,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 95 transitions, 1221 flow [2024-02-07 14:43:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-02-07 14:43:13,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2785923753665689 [2024-02-07 14:43:13,036 INFO L175 Difference]: Start difference. First operand has 127 places, 66 transitions, 954 flow. Second operand 11 states and 95 transitions. [2024-02-07 14:43:13,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 95 transitions, 1221 flow [2024-02-07 14:43:13,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 95 transitions, 1161 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:13,058 INFO L231 Difference]: Finished difference. Result has 127 places, 62 transitions, 908 flow [2024-02-07 14:43:13,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=908, PETRI_PLACES=127, PETRI_TRANSITIONS=62} [2024-02-07 14:43:13,059 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 94 predicate places. [2024-02-07 14:43:13,059 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 62 transitions, 908 flow [2024-02-07 14:43:13,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:13,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:13,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:13,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-02-07 14:43:13,060 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:13,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:13,060 INFO L85 PathProgramCache]: Analyzing trace with hash 840272566, now seen corresponding path program 7 times [2024-02-07 14:43:13,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:13,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132520677] [2024-02-07 14:43:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:13,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:13,187 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 14:43:13,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:13,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132520677] [2024-02-07 14:43:13,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132520677] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:13,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:13,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:13,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556432772] [2024-02-07 14:43:13,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:13,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:13,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:13,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 62 transitions, 908 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:13,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:13,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:13,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:13,395 INFO L124 PetriNetUnfolderBase]: 169/414 cut-off events. [2024-02-07 14:43:13,395 INFO L125 PetriNetUnfolderBase]: For 1713/1713 co-relation queries the response was YES. [2024-02-07 14:43:13,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2461 conditions, 414 events. 169/414 cut-off events. For 1713/1713 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2030 event pairs, 29 based on Foata normal form. 1/389 useless extension candidates. Maximal degree in co-relation 2398. Up to 212 conditions per place. [2024-02-07 14:43:13,398 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 43 selfloop transitions, 23 changer transitions 16/83 dead transitions. [2024-02-07 14:43:13,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 83 transitions, 1127 flow [2024-02-07 14:43:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:43:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:43:13,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-02-07 14:43:13,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-02-07 14:43:13,400 INFO L175 Difference]: Start difference. First operand has 127 places, 62 transitions, 908 flow. Second operand 9 states and 97 transitions. [2024-02-07 14:43:13,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 83 transitions, 1127 flow [2024-02-07 14:43:13,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 83 transitions, 1066 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:13,409 INFO L231 Difference]: Finished difference. Result has 119 places, 58 transitions, 824 flow [2024-02-07 14:43:13,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=824, PETRI_PLACES=119, PETRI_TRANSITIONS=58} [2024-02-07 14:43:13,410 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 86 predicate places. [2024-02-07 14:43:13,410 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 58 transitions, 824 flow [2024-02-07 14:43:13,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:13,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:13,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:13,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-02-07 14:43:13,411 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:13,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1323817431, now seen corresponding path program 8 times [2024-02-07 14:43:13,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:13,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398777684] [2024-02-07 14:43:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:13,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:13,555 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 14:43:13,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:13,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398777684] [2024-02-07 14:43:13,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398777684] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:13,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:13,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:13,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598740745] [2024-02-07 14:43:13,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:13,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:13,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:13,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:13,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:13,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:13,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 58 transitions, 824 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:13,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:13,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:13,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:13,841 INFO L124 PetriNetUnfolderBase]: 159/394 cut-off events. [2024-02-07 14:43:13,841 INFO L125 PetriNetUnfolderBase]: For 1443/1443 co-relation queries the response was YES. [2024-02-07 14:43:13,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 394 events. 159/394 cut-off events. For 1443/1443 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1916 event pairs, 15 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 2234. Up to 134 conditions per place. [2024-02-07 14:43:13,844 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 61 selfloop transitions, 29 changer transitions 10/101 dead transitions. [2024-02-07 14:43:13,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 101 transitions, 1155 flow [2024-02-07 14:43:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:43:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:43:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2024-02-07 14:43:13,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29280397022332505 [2024-02-07 14:43:13,846 INFO L175 Difference]: Start difference. First operand has 119 places, 58 transitions, 824 flow. Second operand 13 states and 118 transitions. [2024-02-07 14:43:13,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 101 transitions, 1155 flow [2024-02-07 14:43:13,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 101 transitions, 1070 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:13,853 INFO L231 Difference]: Finished difference. Result has 119 places, 60 transitions, 829 flow [2024-02-07 14:43:13,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=829, PETRI_PLACES=119, PETRI_TRANSITIONS=60} [2024-02-07 14:43:13,854 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 86 predicate places. [2024-02-07 14:43:13,854 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 60 transitions, 829 flow [2024-02-07 14:43:13,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:13,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:13,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:13,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-02-07 14:43:13,855 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:13,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:13,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2100473843, now seen corresponding path program 9 times [2024-02-07 14:43:13,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:13,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044955140] [2024-02-07 14:43:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:13,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:14,011 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 14:43:14,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:14,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044955140] [2024-02-07 14:43:14,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044955140] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:14,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:14,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:14,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600453064] [2024-02-07 14:43:14,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:14,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:14,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:14,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:14,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:14,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 60 transitions, 829 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:14,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:14,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:14,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:14,284 INFO L124 PetriNetUnfolderBase]: 155/379 cut-off events. [2024-02-07 14:43:14,284 INFO L125 PetriNetUnfolderBase]: For 1204/1204 co-relation queries the response was YES. [2024-02-07 14:43:14,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2257 conditions, 379 events. 155/379 cut-off events. For 1204/1204 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1806 event pairs, 11 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 2198. Up to 134 conditions per place. [2024-02-07 14:43:14,287 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 51 selfloop transitions, 27 changer transitions 16/95 dead transitions. [2024-02-07 14:43:14,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 95 transitions, 1100 flow [2024-02-07 14:43:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:43:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:43:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 108 transitions. [2024-02-07 14:43:14,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2024-02-07 14:43:14,288 INFO L175 Difference]: Start difference. First operand has 119 places, 60 transitions, 829 flow. Second operand 12 states and 108 transitions. [2024-02-07 14:43:14,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 95 transitions, 1100 flow [2024-02-07 14:43:14,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 95 transitions, 1051 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-02-07 14:43:14,296 INFO L231 Difference]: Finished difference. Result has 124 places, 58 transitions, 806 flow [2024-02-07 14:43:14,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=806, PETRI_PLACES=124, PETRI_TRANSITIONS=58} [2024-02-07 14:43:14,297 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 91 predicate places. [2024-02-07 14:43:14,297 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 58 transitions, 806 flow [2024-02-07 14:43:14,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:14,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:14,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:14,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-02-07 14:43:14,298 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:14,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2043699337, now seen corresponding path program 10 times [2024-02-07 14:43:14,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:14,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752069300] [2024-02-07 14:43:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:14,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:14,441 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 14:43:14,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:14,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752069300] [2024-02-07 14:43:14,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752069300] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:14,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:14,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:14,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794896871] [2024-02-07 14:43:14,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:14,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:14,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:14,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:14,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 58 transitions, 806 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:14,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:14,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:14,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:14,681 INFO L124 PetriNetUnfolderBase]: 138/339 cut-off events. [2024-02-07 14:43:14,681 INFO L125 PetriNetUnfolderBase]: For 1170/1170 co-relation queries the response was YES. [2024-02-07 14:43:14,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2061 conditions, 339 events. 138/339 cut-off events. For 1170/1170 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1541 event pairs, 11 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 2014. Up to 134 conditions per place. [2024-02-07 14:43:14,686 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 49 selfloop transitions, 23 changer transitions 15/88 dead transitions. [2024-02-07 14:43:14,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 88 transitions, 1047 flow [2024-02-07 14:43:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:43:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:43:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 103 transitions. [2024-02-07 14:43:14,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2768817204301075 [2024-02-07 14:43:14,687 INFO L175 Difference]: Start difference. First operand has 124 places, 58 transitions, 806 flow. Second operand 12 states and 103 transitions. [2024-02-07 14:43:14,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 88 transitions, 1047 flow [2024-02-07 14:43:14,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 88 transitions, 980 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-02-07 14:43:14,694 INFO L231 Difference]: Finished difference. Result has 122 places, 54 transitions, 730 flow [2024-02-07 14:43:14,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=730, PETRI_PLACES=122, PETRI_TRANSITIONS=54} [2024-02-07 14:43:14,695 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2024-02-07 14:43:14,695 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 54 transitions, 730 flow [2024-02-07 14:43:14,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:14,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:14,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:14,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-02-07 14:43:14,695 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:14,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:14,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1182094451, now seen corresponding path program 11 times [2024-02-07 14:43:14,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:14,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774100848] [2024-02-07 14:43:14,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:14,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:14,831 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 14:43:14,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:14,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774100848] [2024-02-07 14:43:14,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774100848] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:14,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:14,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:14,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439651547] [2024-02-07 14:43:14,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:14,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:14,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:14,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:14,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 54 transitions, 730 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:14,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:14,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:14,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:15,074 INFO L124 PetriNetUnfolderBase]: 128/321 cut-off events. [2024-02-07 14:43:15,074 INFO L125 PetriNetUnfolderBase]: For 1032/1032 co-relation queries the response was YES. [2024-02-07 14:43:15,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1922 conditions, 321 events. 128/321 cut-off events. For 1032/1032 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1451 event pairs, 11 based on Foata normal form. 1/304 useless extension candidates. Maximal degree in co-relation 1868. Up to 134 conditions per place. [2024-02-07 14:43:15,077 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 48 selfloop transitions, 21 changer transitions 12/82 dead transitions. [2024-02-07 14:43:15,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 82 transitions, 961 flow [2024-02-07 14:43:15,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 91 transitions. [2024-02-07 14:43:15,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29354838709677417 [2024-02-07 14:43:15,078 INFO L175 Difference]: Start difference. First operand has 122 places, 54 transitions, 730 flow. Second operand 10 states and 91 transitions. [2024-02-07 14:43:15,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 82 transitions, 961 flow [2024-02-07 14:43:15,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 82 transitions, 908 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-02-07 14:43:15,084 INFO L231 Difference]: Finished difference. Result has 115 places, 52 transitions, 692 flow [2024-02-07 14:43:15,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=692, PETRI_PLACES=115, PETRI_TRANSITIONS=52} [2024-02-07 14:43:15,085 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2024-02-07 14:43:15,085 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 52 transitions, 692 flow [2024-02-07 14:43:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:15,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:15,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:15,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-02-07 14:43:15,086 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:15,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash 363655849, now seen corresponding path program 12 times [2024-02-07 14:43:15,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:15,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982748188] [2024-02-07 14:43:15,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:15,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:15,215 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 14:43:15,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:15,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982748188] [2024-02-07 14:43:15,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982748188] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:15,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:15,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:15,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651705135] [2024-02-07 14:43:15,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:15,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:15,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:15,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:15,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:15,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 52 transitions, 692 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:15,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:15,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:15,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:15,435 INFO L124 PetriNetUnfolderBase]: 122/302 cut-off events. [2024-02-07 14:43:15,436 INFO L125 PetriNetUnfolderBase]: For 948/948 co-relation queries the response was YES. [2024-02-07 14:43:15,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1806 conditions, 302 events. 122/302 cut-off events. For 948/948 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1315 event pairs, 11 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 1758. Up to 134 conditions per place. [2024-02-07 14:43:15,438 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 17 changer transitions 22/74 dead transitions. [2024-02-07 14:43:15,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 74 transitions, 885 flow [2024-02-07 14:43:15,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:15,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-02-07 14:43:15,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2709677419354839 [2024-02-07 14:43:15,440 INFO L175 Difference]: Start difference. First operand has 115 places, 52 transitions, 692 flow. Second operand 10 states and 84 transitions. [2024-02-07 14:43:15,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 74 transitions, 885 flow [2024-02-07 14:43:15,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 74 transitions, 851 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-02-07 14:43:15,445 INFO L231 Difference]: Finished difference. Result has 115 places, 46 transitions, 617 flow [2024-02-07 14:43:15,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=617, PETRI_PLACES=115, PETRI_TRANSITIONS=46} [2024-02-07 14:43:15,446 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2024-02-07 14:43:15,446 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 46 transitions, 617 flow [2024-02-07 14:43:15,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:15,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:15,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:15,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-02-07 14:43:15,447 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:15,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:15,447 INFO L85 PathProgramCache]: Analyzing trace with hash -111690049, now seen corresponding path program 13 times [2024-02-07 14:43:15,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:15,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831164395] [2024-02-07 14:43:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:15,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:15,606 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 14:43:15,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:15,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831164395] [2024-02-07 14:43:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831164395] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:15,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:15,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:15,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490679529] [2024-02-07 14:43:15,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:15,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:15,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:15,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:15,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 46 transitions, 617 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:15,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:15,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:15,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:15,813 INFO L124 PetriNetUnfolderBase]: 93/241 cut-off events. [2024-02-07 14:43:15,813 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2024-02-07 14:43:15,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1568 conditions, 241 events. 93/241 cut-off events. For 713/713 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 992 event pairs, 6 based on Foata normal form. 1/228 useless extension candidates. Maximal degree in co-relation 1521. Up to 83 conditions per place. [2024-02-07 14:43:15,815 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 27 changer transitions 9/74 dead transitions. [2024-02-07 14:43:15,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 74 transitions, 839 flow [2024-02-07 14:43:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 14:43:15,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 14:43:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2024-02-07 14:43:15,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24317617866004962 [2024-02-07 14:43:15,818 INFO L175 Difference]: Start difference. First operand has 115 places, 46 transitions, 617 flow. Second operand 13 states and 98 transitions. [2024-02-07 14:43:15,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 74 transitions, 839 flow [2024-02-07 14:43:15,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 74 transitions, 743 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-02-07 14:43:15,822 INFO L231 Difference]: Finished difference. Result has 103 places, 46 transitions, 576 flow [2024-02-07 14:43:15,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=576, PETRI_PLACES=103, PETRI_TRANSITIONS=46} [2024-02-07 14:43:15,823 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 70 predicate places. [2024-02-07 14:43:15,823 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 46 transitions, 576 flow [2024-02-07 14:43:15,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:15,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:15,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:15,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-02-07 14:43:15,824 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:15,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 865011094, now seen corresponding path program 8 times [2024-02-07 14:43:15,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:15,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410343210] [2024-02-07 14:43:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:15,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:15,945 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 14:43:15,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:15,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410343210] [2024-02-07 14:43:15,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410343210] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:15,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:15,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:15,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055403028] [2024-02-07 14:43:15,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:15,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:15,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:15,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:15,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:15,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 46 transitions, 576 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:15,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:15,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:15,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:16,099 INFO L124 PetriNetUnfolderBase]: 93/245 cut-off events. [2024-02-07 14:43:16,100 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-02-07 14:43:16,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 245 events. 93/245 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1035 event pairs, 40 based on Foata normal form. 1/234 useless extension candidates. Maximal degree in co-relation 1491. Up to 99 conditions per place. [2024-02-07 14:43:16,102 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 49 selfloop transitions, 14 changer transitions 10/74 dead transitions. [2024-02-07 14:43:16,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 74 transitions, 813 flow [2024-02-07 14:43:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-02-07 14:43:16,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-02-07 14:43:16,104 INFO L175 Difference]: Start difference. First operand has 103 places, 46 transitions, 576 flow. Second operand 10 states and 111 transitions. [2024-02-07 14:43:16,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 74 transitions, 813 flow [2024-02-07 14:43:16,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 74 transitions, 741 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-02-07 14:43:16,108 INFO L231 Difference]: Finished difference. Result has 103 places, 45 transitions, 520 flow [2024-02-07 14:43:16,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=520, PETRI_PLACES=103, PETRI_TRANSITIONS=45} [2024-02-07 14:43:16,108 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 70 predicate places. [2024-02-07 14:43:16,109 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 45 transitions, 520 flow [2024-02-07 14:43:16,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:16,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:16,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-02-07 14:43:16,109 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:16,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash 766839186, now seen corresponding path program 9 times [2024-02-07 14:43:16,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:16,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593746226] [2024-02-07 14:43:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:16,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 14:43:16,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:16,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593746226] [2024-02-07 14:43:16,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593746226] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:16,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:16,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:16,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283194456] [2024-02-07 14:43:16,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:16,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:16,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:16,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:16,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 45 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:16,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:16,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:16,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:16,368 INFO L124 PetriNetUnfolderBase]: 87/226 cut-off events. [2024-02-07 14:43:16,369 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2024-02-07 14:43:16,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 226 events. 87/226 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 912 event pairs, 40 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 1301. Up to 99 conditions per place. [2024-02-07 14:43:16,370 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 43 selfloop transitions, 11 changer transitions 12/67 dead transitions. [2024-02-07 14:43:16,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 67 transitions, 709 flow [2024-02-07 14:43:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:43:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:43:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-02-07 14:43:16,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-02-07 14:43:16,372 INFO L175 Difference]: Start difference. First operand has 103 places, 45 transitions, 520 flow. Second operand 9 states and 99 transitions. [2024-02-07 14:43:16,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 67 transitions, 709 flow [2024-02-07 14:43:16,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 67 transitions, 671 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-02-07 14:43:16,376 INFO L231 Difference]: Finished difference. Result has 102 places, 42 transitions, 465 flow [2024-02-07 14:43:16,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=465, PETRI_PLACES=102, PETRI_TRANSITIONS=42} [2024-02-07 14:43:16,378 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 69 predicate places. [2024-02-07 14:43:16,378 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 42 transitions, 465 flow [2024-02-07 14:43:16,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:16,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:16,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:16,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-02-07 14:43:16,379 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:16,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:16,379 INFO L85 PathProgramCache]: Analyzing trace with hash -638655934, now seen corresponding path program 10 times [2024-02-07 14:43:16,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:16,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683525916] [2024-02-07 14:43:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:16,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:16,496 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 14:43:16,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:16,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683525916] [2024-02-07 14:43:16,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683525916] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:16,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:16,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 14:43:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464825939] [2024-02-07 14:43:16,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:16,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 14:43:16,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:16,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 14:43:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 14:43:16,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 14:43:16,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 42 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:16,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:16,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 14:43:16,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:16,672 INFO L124 PetriNetUnfolderBase]: 82/206 cut-off events. [2024-02-07 14:43:16,673 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-02-07 14:43:16,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1220 conditions, 206 events. 82/206 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 773 event pairs, 40 based on Foata normal form. 1/195 useless extension candidates. Maximal degree in co-relation 1187. Up to 99 conditions per place. [2024-02-07 14:43:16,674 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 8 changer transitions 18/57 dead transitions. [2024-02-07 14:43:16,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 57 transitions, 610 flow [2024-02-07 14:43:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 14:43:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 14:43:16,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-02-07 14:43:16,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-02-07 14:43:16,675 INFO L175 Difference]: Start difference. First operand has 102 places, 42 transitions, 465 flow. Second operand 8 states and 84 transitions. [2024-02-07 14:43:16,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 57 transitions, 610 flow [2024-02-07 14:43:16,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 57 transitions, 581 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:16,678 INFO L231 Difference]: Finished difference. Result has 97 places, 36 transitions, 371 flow [2024-02-07 14:43:16,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=97, PETRI_TRANSITIONS=36} [2024-02-07 14:43:16,678 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2024-02-07 14:43:16,678 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 36 transitions, 371 flow [2024-02-07 14:43:16,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 14:43:16,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:16,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:16,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-02-07 14:43:16,679 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:16,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1180863557, now seen corresponding path program 14 times [2024-02-07 14:43:16,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:16,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183825294] [2024-02-07 14:43:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:16,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:16,807 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 14:43:16,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:16,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183825294] [2024-02-07 14:43:16,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183825294] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:16,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:16,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:16,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622134668] [2024-02-07 14:43:16,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:16,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:16,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:16,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:16,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:16,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 36 transitions, 371 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:16,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:16,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:16,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:17,011 INFO L124 PetriNetUnfolderBase]: 59/161 cut-off events. [2024-02-07 14:43:17,011 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2024-02-07 14:43:17,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 161 events. 59/161 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 567 event pairs, 2 based on Foata normal form. 1/162 useless extension candidates. Maximal degree in co-relation 923. Up to 48 conditions per place. [2024-02-07 14:43:17,012 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 35 selfloop transitions, 15 changer transitions 9/60 dead transitions. [2024-02-07 14:43:17,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 60 transitions, 549 flow [2024-02-07 14:43:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:43:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:43:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 91 transitions. [2024-02-07 14:43:17,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2446236559139785 [2024-02-07 14:43:17,013 INFO L175 Difference]: Start difference. First operand has 97 places, 36 transitions, 371 flow. Second operand 12 states and 91 transitions. [2024-02-07 14:43:17,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 60 transitions, 549 flow [2024-02-07 14:43:17,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 60 transitions, 507 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-02-07 14:43:17,015 INFO L231 Difference]: Finished difference. Result has 85 places, 34 transitions, 332 flow [2024-02-07 14:43:17,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=85, PETRI_TRANSITIONS=34} [2024-02-07 14:43:17,015 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2024-02-07 14:43:17,015 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 34 transitions, 332 flow [2024-02-07 14:43:17,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:17,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:17,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-02-07 14:43:17,016 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:17,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash -353912151, now seen corresponding path program 15 times [2024-02-07 14:43:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:17,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759924102] [2024-02-07 14:43:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:17,146 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 14:43:17,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:17,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759924102] [2024-02-07 14:43:17,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759924102] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:17,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:17,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:17,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112029507] [2024-02-07 14:43:17,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:17,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:17,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:17,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:17,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:17,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 34 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:17,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:17,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:17,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:17,351 INFO L124 PetriNetUnfolderBase]: 53/142 cut-off events. [2024-02-07 14:43:17,352 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-02-07 14:43:17,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 142 events. 53/142 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 459 event pairs, 2 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 792. Up to 48 conditions per place. [2024-02-07 14:43:17,353 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 30 selfloop transitions, 12 changer transitions 11/54 dead transitions. [2024-02-07 14:43:17,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 54 transitions, 484 flow [2024-02-07 14:43:17,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:43:17,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:43:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 86 transitions. [2024-02-07 14:43:17,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23118279569892472 [2024-02-07 14:43:17,354 INFO L175 Difference]: Start difference. First operand has 85 places, 34 transitions, 332 flow. Second operand 12 states and 86 transitions. [2024-02-07 14:43:17,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 54 transitions, 484 flow [2024-02-07 14:43:17,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 54 transitions, 447 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-02-07 14:43:17,357 INFO L231 Difference]: Finished difference. Result has 84 places, 30 transitions, 269 flow [2024-02-07 14:43:17,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=269, PETRI_PLACES=84, PETRI_TRANSITIONS=30} [2024-02-07 14:43:17,357 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 51 predicate places. [2024-02-07 14:43:17,357 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 30 transitions, 269 flow [2024-02-07 14:43:17,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:17,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:17,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:17,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-02-07 14:43:17,358 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:17,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1382905843, now seen corresponding path program 16 times [2024-02-07 14:43:17,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:17,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009228726] [2024-02-07 14:43:17,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:17,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:17,487 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 14:43:17,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:17,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009228726] [2024-02-07 14:43:17,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009228726] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:17,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:17,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:17,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766318293] [2024-02-07 14:43:17,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:17,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:17,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:17,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:17,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 30 transitions, 269 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:17,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:17,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:17,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:17,668 INFO L124 PetriNetUnfolderBase]: 48/133 cut-off events. [2024-02-07 14:43:17,668 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-02-07 14:43:17,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 720 conditions, 133 events. 48/133 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 410 event pairs, 4 based on Foata normal form. 1/134 useless extension candidates. Maximal degree in co-relation 698. Up to 49 conditions per place. [2024-02-07 14:43:17,669 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 24 selfloop transitions, 13 changer transitions 11/49 dead transitions. [2024-02-07 14:43:17,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 49 transitions, 410 flow [2024-02-07 14:43:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:43:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:43:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 80 transitions. [2024-02-07 14:43:17,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21505376344086022 [2024-02-07 14:43:17,671 INFO L175 Difference]: Start difference. First operand has 84 places, 30 transitions, 269 flow. Second operand 12 states and 80 transitions. [2024-02-07 14:43:17,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 49 transitions, 410 flow [2024-02-07 14:43:17,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 49 transitions, 367 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-02-07 14:43:17,672 INFO L231 Difference]: Finished difference. Result has 78 places, 28 transitions, 225 flow [2024-02-07 14:43:17,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=225, PETRI_PLACES=78, PETRI_TRANSITIONS=28} [2024-02-07 14:43:17,673 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 45 predicate places. [2024-02-07 14:43:17,673 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 28 transitions, 225 flow [2024-02-07 14:43:17,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:17,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:17,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:17,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-02-07 14:43:17,674 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:17,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1801105755, now seen corresponding path program 17 times [2024-02-07 14:43:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:17,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537904893] [2024-02-07 14:43:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:17,799 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 14:43:17,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:17,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537904893] [2024-02-07 14:43:17,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537904893] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:17,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:17,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256395328] [2024-02-07 14:43:17,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:17,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:17,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:17,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:17,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:17,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 28 transitions, 225 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:17,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:17,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:17,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:17,985 INFO L124 PetriNetUnfolderBase]: 36/102 cut-off events. [2024-02-07 14:43:17,985 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-02-07 14:43:17,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 102 events. 36/102 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 270 event pairs, 2 based on Foata normal form. 1/103 useless extension candidates. Maximal degree in co-relation 514. Up to 24 conditions per place. [2024-02-07 14:43:17,986 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 20 selfloop transitions, 9 changer transitions 15/45 dead transitions. [2024-02-07 14:43:17,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 45 transitions, 350 flow [2024-02-07 14:43:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 14:43:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 14:43:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 79 transitions. [2024-02-07 14:43:17,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21236559139784947 [2024-02-07 14:43:17,987 INFO L175 Difference]: Start difference. First operand has 78 places, 28 transitions, 225 flow. Second operand 12 states and 79 transitions. [2024-02-07 14:43:17,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 45 transitions, 350 flow [2024-02-07 14:43:17,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 45 transitions, 320 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-02-07 14:43:17,989 INFO L231 Difference]: Finished difference. Result has 76 places, 23 transitions, 161 flow [2024-02-07 14:43:17,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=161, PETRI_PLACES=76, PETRI_TRANSITIONS=23} [2024-02-07 14:43:17,990 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 43 predicate places. [2024-02-07 14:43:17,990 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 23 transitions, 161 flow [2024-02-07 14:43:17,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:17,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:17,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:17,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-02-07 14:43:17,991 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:17,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1695158391, now seen corresponding path program 18 times [2024-02-07 14:43:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:17,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547980981] [2024-02-07 14:43:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:18,113 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 14:43:18,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:18,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547980981] [2024-02-07 14:43:18,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547980981] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:18,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:18,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:18,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863260924] [2024-02-07 14:43:18,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:18,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:18,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:18,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:18,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:18,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 23 transitions, 161 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:18,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:18,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:18,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:18,295 INFO L124 PetriNetUnfolderBase]: 21/75 cut-off events. [2024-02-07 14:43:18,295 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-02-07 14:43:18,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 75 events. 21/75 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 184 event pairs, 0 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 380. Up to 21 conditions per place. [2024-02-07 14:43:18,296 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 24 selfloop transitions, 8 changer transitions 9/42 dead transitions. [2024-02-07 14:43:18,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 42 transitions, 299 flow [2024-02-07 14:43:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 14:43:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 14:43:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 75 transitions. [2024-02-07 14:43:18,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21994134897360704 [2024-02-07 14:43:18,297 INFO L175 Difference]: Start difference. First operand has 76 places, 23 transitions, 161 flow. Second operand 11 states and 75 transitions. [2024-02-07 14:43:18,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 42 transitions, 299 flow [2024-02-07 14:43:18,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 42 transitions, 255 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-02-07 14:43:18,298 INFO L231 Difference]: Finished difference. Result has 65 places, 22 transitions, 127 flow [2024-02-07 14:43:18,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=127, PETRI_PLACES=65, PETRI_TRANSITIONS=22} [2024-02-07 14:43:18,299 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 32 predicate places. [2024-02-07 14:43:18,299 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 22 transitions, 127 flow [2024-02-07 14:43:18,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:18,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:18,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:18,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-02-07 14:43:18,300 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:18,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1596986483, now seen corresponding path program 19 times [2024-02-07 14:43:18,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:18,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798969413] [2024-02-07 14:43:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:18,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:18,423 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 14:43:18,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:18,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798969413] [2024-02-07 14:43:18,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798969413] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:18,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:18,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:18,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365539809] [2024-02-07 14:43:18,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:18,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:18,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:18,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:18,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 22 transitions, 127 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:18,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:18,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:18,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:18,585 INFO L124 PetriNetUnfolderBase]: 15/56 cut-off events. [2024-02-07 14:43:18,586 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-02-07 14:43:18,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 56 events. 15/56 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 1/55 useless extension candidates. Maximal degree in co-relation 244. Up to 14 conditions per place. [2024-02-07 14:43:18,586 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 18 selfloop transitions, 5 changer transitions 11/35 dead transitions. [2024-02-07 14:43:18,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 35 transitions, 224 flow [2024-02-07 14:43:18,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 14:43:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 14:43:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 65 transitions. [2024-02-07 14:43:18,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20967741935483872 [2024-02-07 14:43:18,587 INFO L175 Difference]: Start difference. First operand has 65 places, 22 transitions, 127 flow. Second operand 10 states and 65 transitions. [2024-02-07 14:43:18,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 35 transitions, 224 flow [2024-02-07 14:43:18,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 35 transitions, 202 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-02-07 14:43:18,589 INFO L231 Difference]: Finished difference. Result has 63 places, 18 transitions, 82 flow [2024-02-07 14:43:18,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=82, PETRI_PLACES=63, PETRI_TRANSITIONS=18} [2024-02-07 14:43:18,589 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2024-02-07 14:43:18,589 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 18 transitions, 82 flow [2024-02-07 14:43:18,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:18,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 14:43:18,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:18,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-02-07 14:43:18,590 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 14:43:18,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 14:43:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1836881371, now seen corresponding path program 20 times [2024-02-07 14:43:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 14:43:18,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243136796] [2024-02-07 14:43:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 14:43:18,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 14:43:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 14:43:18,730 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 14:43:18,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 14:43:18,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243136796] [2024-02-07 14:43:18,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243136796] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 14:43:18,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 14:43:18,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 14:43:18,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342195400] [2024-02-07 14:43:18,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 14:43:18,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 14:43:18,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 14:43:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 14:43:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 14:43:18,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 14:43:18,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 18 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:18,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 14:43:18,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 14:43:18,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 14:43:18,875 INFO L124 PetriNetUnfolderBase]: 10/36 cut-off events. [2024-02-07 14:43:18,875 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 14:43:18,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 36 events. 10/36 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 31 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 150. Up to 9 conditions per place. [2024-02-07 14:43:18,876 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2024-02-07 14:43:18,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 24 transitions, 141 flow [2024-02-07 14:43:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 14:43:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 14:43:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 52 transitions. [2024-02-07 14:43:18,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1863799283154122 [2024-02-07 14:43:18,877 INFO L175 Difference]: Start difference. First operand has 63 places, 18 transitions, 82 flow. Second operand 9 states and 52 transitions. [2024-02-07 14:43:18,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 24 transitions, 141 flow [2024-02-07 14:43:18,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 24 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-02-07 14:43:18,878 INFO L231 Difference]: Finished difference. Result has 57 places, 0 transitions, 0 flow [2024-02-07 14:43:18,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=57, PETRI_TRANSITIONS=0} [2024-02-07 14:43:18,878 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2024-02-07 14:43:18,878 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 0 transitions, 0 flow [2024-02-07 14:43:18,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 14:43:18,881 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 15 remaining) [2024-02-07 14:43:18,881 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 15 remaining) [2024-02-07 14:43:18,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 15 remaining) [2024-02-07 14:43:18,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 15 remaining) [2024-02-07 14:43:18,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 15 remaining) [2024-02-07 14:43:18,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 15 remaining) [2024-02-07 14:43:18,882 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (8 of 15 remaining) [2024-02-07 14:43:18,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 15 remaining) [2024-02-07 14:43:18,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 15 remaining) [2024-02-07 14:43:18,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 15 remaining) [2024-02-07 14:43:18,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 15 remaining) [2024-02-07 14:43:18,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 15 remaining) [2024-02-07 14:43:18,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 15 remaining) [2024-02-07 14:43:18,883 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 15 remaining) [2024-02-07 14:43:18,884 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 15 remaining) [2024-02-07 14:43:18,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-02-07 14:43:18,884 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 10, 5, 1, 1, 1, 1, 1, 1] [2024-02-07 14:43:18,889 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 14:43:18,889 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 14:43:18,893 INFO L503 ceAbstractionStarter]: Automizer considered 6 witness invariants [2024-02-07 14:43:18,893 INFO L504 ceAbstractionStarter]: WitnessConsidered=6 [2024-02-07 14:43:18,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 02:43:18 BasicIcfg [2024-02-07 14:43:18,895 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 14:43:18,896 INFO L158 Benchmark]: Toolchain (without parser) took 19897.40ms. Allocated memory was 163.6MB in the beginning and 318.8MB in the end (delta: 155.2MB). Free memory was 130.2MB in the beginning and 233.1MB in the end (delta: -102.9MB). Peak memory consumption was 53.6MB. Max. memory is 16.1GB. [2024-02-07 14:43:18,896 INFO L158 Benchmark]: Witness Parser took 0.10ms. Allocated memory is still 163.6MB. Free memory is still 121.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:43:18,896 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 163.6MB. Free memory is still 134.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:43:18,896 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.35ms. Allocated memory is still 163.6MB. Free memory was 130.2MB in the beginning and 116.3MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-02-07 14:43:18,900 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.67ms. Allocated memory is still 163.6MB. Free memory was 116.3MB in the beginning and 114.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 14:43:18,900 INFO L158 Benchmark]: Boogie Preprocessor took 44.06ms. Allocated memory is still 163.6MB. Free memory was 114.7MB in the beginning and 112.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 14:43:18,900 INFO L158 Benchmark]: RCFGBuilder took 436.58ms. Allocated memory is still 163.6MB. Free memory was 112.6MB in the beginning and 88.0MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-02-07 14:43:18,901 INFO L158 Benchmark]: TraceAbstraction took 19117.70ms. Allocated memory was 163.6MB in the beginning and 318.8MB in the end (delta: 155.2MB). Free memory was 86.9MB in the beginning and 233.1MB in the end (delta: -146.1MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2024-02-07 14:43:18,902 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.10ms. Allocated memory is still 163.6MB. Free memory is still 121.9MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.16ms. Allocated memory is still 163.6MB. Free memory is still 134.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 242.35ms. Allocated memory is still 163.6MB. Free memory was 130.2MB in the beginning and 116.3MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.67ms. Allocated memory is still 163.6MB. Free memory was 116.3MB in the beginning and 114.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 44.06ms. Allocated memory is still 163.6MB. Free memory was 114.7MB in the beginning and 112.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 436.58ms. Allocated memory is still 163.6MB. Free memory was 112.6MB in the beginning and 88.0MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 19117.70ms. Allocated memory was 163.6MB in the beginning and 318.8MB in the end (delta: 155.2MB). Free memory was 86.9MB in the beginning and 233.1MB in the end (delta: -146.1MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 46]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 48]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 56]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 58]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 60]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 76]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 15 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19.0s, OverallIterations: 51, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 11.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3929 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3739 mSDsluCounter, 1120 SdHoareTripleChecker+Invalid, 4.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1005 mSDsCounter, 272 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8254 IncrementalHoareTripleChecker+Invalid, 8526 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 272 mSolverCounterUnsat, 115 mSDtfsCounter, 8254 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 838 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 531 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=992occurred in iteration=31, InterpolantAutomatonStates: 497, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.4s InterpolantComputationTime, 850 NumberOfCodeBlocks, 850 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 4971 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 51 InterpolantComputations, 51 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-02-07 14:43:18,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE