./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 e7c74aec Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/weaver/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-wip.fs.fix-undeclared-acsl-variable-e7c74ae-m [2024-02-07 19:20:38,998 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-07 19:20:39,073 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-07 19:20:39,085 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-07 19:20:39,085 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-07 19:20:39,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-07 19:20:39,132 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-07 19:20:39,133 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-07 19:20:39,133 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-07 19:20:39,137 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-07 19:20:39,138 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-07 19:20:39,138 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-07 19:20:39,139 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-07 19:20:39,140 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-07 19:20:39,141 INFO L153 SettingsManager]: * Use SBE=true [2024-02-07 19:20:39,141 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-07 19:20:39,141 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-07 19:20:39,141 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-07 19:20:39,142 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-07 19:20:39,142 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-07 19:20:39,143 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-07 19:20:39,144 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-07 19:20:39,144 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-07 19:20:39,144 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-07 19:20:39,144 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-07 19:20:39,145 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-07 19:20:39,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-07 19:20:39,145 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-07 19:20:39,146 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-07 19:20:39,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-07 19:20:39,147 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-07 19:20:39,147 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-07 19:20:39,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:20:39,148 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-07 19:20:39,148 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-07 19:20:39,148 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-07 19:20:39,148 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-07 19:20:39,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-07 19:20:39,149 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-07 19:20:39,149 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-07 19:20:39,149 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-07 19:20:39,150 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-07 19:20:39,150 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-07 19:20:39,150 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-02-07 19:20:39,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-07 19:20:39,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-07 19:20:39,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-07 19:20:39,450 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-02-07 19:20:39,450 INFO L274 PluginConnector]: Witness Parser initialized [2024-02-07 19:20:39,451 INFO L431 ainManager$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 19:20:39,524 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-07 19:20:39,524 INFO L274 PluginConnector]: CDTParser initialized [2024-02-07 19:20:39,525 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/security.wvr.c [2024-02-07 19:20:40,688 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-07 19:20:40,857 INFO L384 CDTParser]: Found 1 translation units. [2024-02-07 19:20:40,858 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/security.wvr.c [2024-02-07 19:20:40,863 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/226c69271/912c5e3af8b641d99fbfdff23cfcf8be/FLAGe970ca1a8 [2024-02-07 19:20:40,884 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/226c69271/912c5e3af8b641d99fbfdff23cfcf8be [2024-02-07 19:20:40,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-07 19:20:40,886 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-02-07 19:20:40,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-07 19:20:40,887 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-07 19:20:40,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-07 19:20:40,891 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:20:39" (1/2) ... [2024-02-07 19:20:40,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316b50ce and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:20:40, skipping insertion in model container [2024-02-07 19:20:40,892 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:20:39" (1/2) ... [2024-02-07 19:20:40,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@49a55860 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 07.02 07:20:40, skipping insertion in model container [2024-02-07 19:20:40,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:20:40" (2/2) ... [2024-02-07 19:20:40,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316b50ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:40, skipping insertion in model container [2024-02-07 19:20:40,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 07:20:40" (2/2) ... [2024-02-07 19:20:40,895 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-02-07 19:20:40,915 INFO L74 edCorrectnessWitness]: Found the following entries in the witness: [2024-02-07 19:20:40,916 INFO L76 edCorrectnessWitness]: Location invariant before [L58-L58] (z2 <= 1U) && (z2 == 0U || z2 == 1U) [2024-02-07 19:20:40,916 INFO L76 edCorrectnessWitness]: Location invariant before [L44-L44] (z1 <= 1U) && (z1 == 0U || z1 == 1U) [2024-02-07 19:20:40,916 INFO L76 edCorrectnessWitness]: Location invariant before [L46-L46] (z1 <= 1U) && (z1 == 0U || z1 == 1U) [2024-02-07 19:20:40,916 INFO L76 edCorrectnessWitness]: Location invariant before [L48-L48] (x1 <= 1U) && (x1 == 0U || x1 == 1U) [2024-02-07 19:20:40,917 INFO L76 edCorrectnessWitness]: Location invariant before [L60-L60] (x2 <= 1U) && (x2 == 0U || x2 == 1U) [2024-02-07 19:20:40,917 INFO L76 edCorrectnessWitness]: Location invariant before [L56-L56] (z2 <= 1U) && (z2 == 0U || z2 == 1U) [2024-02-07 19:20:40,933 INFO L181 MainTranslator]: Built tables and reachable declarations [2024-02-07 19:20:41,076 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 19:20:41,080 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:20:41,086 INFO L206 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 19:20:41,136 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 19:20:41,137 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-07 19:20:41,149 INFO L211 MainTranslator]: Completed translation [2024-02-07 19:20:41,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41 WrapperNode [2024-02-07 19:20:41,150 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-07 19:20:41,151 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-07 19:20:41,151 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-07 19:20:41,151 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-07 19:20:41,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,167 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,183 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2024-02-07 19:20:41,183 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-07 19:20:41,184 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-07 19:20:41,184 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-07 19:20:41,184 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-07 19:20:41,193 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,197 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,211 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 19:20:41,211 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,211 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,225 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,226 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,230 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-07 19:20:41,234 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-07 19:20:41,234 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-07 19:20:41,234 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-07 19:20:41,235 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (1/1) ... [2024-02-07 19:20:41,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-07 19:20:41,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-07 19:20:41,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-02-07 19:20:41,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-02-07 19:20:41,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-07 19:20:41,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-02-07 19:20:41,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-02-07 19:20:41,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-02-07 19:20:41,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-02-07 19:20:41,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-07 19:20:41,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-07 19:20:41,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-07 19:20:41,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-07 19:20:41,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-07 19:20:41,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-07 19:20:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-07 19:20:41,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-07 19:20:41,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-07 19:20:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-02-07 19:20:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-02-07 19:20:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-02-07 19:20:41,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-07 19:20:41,291 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-07 19:20:41,366 INFO L244 CfgBuilder]: Building ICFG [2024-02-07 19:20:41,367 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-07 19:20:41,625 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-07 19:20:41,625 INFO L293 CfgBuilder]: Performing block encoding [2024-02-07 19:20:41,821 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-07 19:20:41,821 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-02-07 19:20:41,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:20:41 BoogieIcfgContainer [2024-02-07 19:20:41,823 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-07 19:20:41,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-07 19:20:41,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-07 19:20:41,827 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-07 19:20:41,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 07.02 07:20:39" (1/4) ... [2024-02-07 19:20:41,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9864e6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 07.02 07:20:41, skipping insertion in model container [2024-02-07 19:20:41,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 07:20:40" (2/4) ... [2024-02-07 19:20:41,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9864e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:20:41, skipping insertion in model container [2024-02-07 19:20:41,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 07:20:41" (3/4) ... [2024-02-07 19:20:41,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d9864e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 07:20:41, skipping insertion in model container [2024-02-07 19:20:41,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.02 07:20:41" (4/4) ... [2024-02-07 19:20:41,838 INFO L112 eAbstractionObserver]: Analyzing ICFG security.wvr.c [2024-02-07 19:20:41,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-07 19:20:41,860 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-02-07 19:20:41,860 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-07 19:20:41,926 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-02-07 19:20:41,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 31 transitions, 76 flow [2024-02-07 19:20:42,032 INFO L124 PetriNetUnfolderBase]: 2/29 cut-off events. [2024-02-07 19:20:42,032 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-07 19:20:42,046 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 19:20:42,047 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 31 transitions, 76 flow [2024-02-07 19:20:42,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 28 transitions, 68 flow [2024-02-07 19:20:42,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-07 19:20:42,070 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;@1d488059, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-07 19:20:42,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-02-07 19:20:42,084 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-07 19:20:42,084 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2024-02-07 19:20:42,084 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-07 19:20:42,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:42,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-02-07 19:20:42,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 19:20:42,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:42,097 INFO L85 PathProgramCache]: Analyzing trace with hash 213529999, now seen corresponding path program 1 times [2024-02-07 19:20:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:42,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368245376] [2024-02-07 19:20:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:42,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:42,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:42,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368245376] [2024-02-07 19:20:42,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368245376] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:42,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:42,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:42,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006933832] [2024-02-07 19:20:42,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:42,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:20:42,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:20:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:20:42,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 19:20:42,537 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 19:20:42,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:42,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 19:20:42,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:42,704 INFO L124 PetriNetUnfolderBase]: 133/253 cut-off events. [2024-02-07 19:20:42,704 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-02-07 19:20:42,705 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 19:20:42,708 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 29 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2024-02-07 19:20:42,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 145 flow [2024-02-07 19:20:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-02-07 19:20:42,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-02-07 19:20:42,718 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 68 flow. Second operand 3 states and 53 transitions. [2024-02-07 19:20:42,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 145 flow [2024-02-07 19:20:42,720 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 19:20:42,722 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 58 flow [2024-02-07 19:20:42,723 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 19:20:42,725 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2024-02-07 19:20:42,725 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 58 flow [2024-02-07 19:20:42,725 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 19:20:42,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:42,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 19:20:42,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-07 19:20:42,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 19:20:42,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1970504387, now seen corresponding path program 1 times [2024-02-07 19:20:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:42,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735625010] [2024-02-07 19:20:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:42,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:42,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:42,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735625010] [2024-02-07 19:20:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735625010] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:42,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:42,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:42,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235433200] [2024-02-07 19:20:42,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:20:42,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:20:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:20:42,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-02-07 19:20:42,790 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 19:20:42,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:42,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-02-07 19:20:42,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:42,947 INFO L124 PetriNetUnfolderBase]: 191/390 cut-off events. [2024-02-07 19:20:42,947 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-02-07 19:20:42,951 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 19:20:42,954 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 35 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2024-02-07 19:20:42,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 161 flow [2024-02-07 19:20:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-02-07 19:20:42,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559139784946236 [2024-02-07 19:20:42,957 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 58 flow. Second operand 3 states and 61 transitions. [2024-02-07 19:20:42,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 161 flow [2024-02-07 19:20:42,960 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 19:20:42,962 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 62 flow [2024-02-07 19:20:42,962 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 19:20:42,963 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-02-07 19:20:42,968 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 62 flow [2024-02-07 19:20:42,968 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 19:20:42,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:42,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-02-07 19:20:42,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-07 19:20:42,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 19:20:42,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1970503364, now seen corresponding path program 1 times [2024-02-07 19:20:42,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:42,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275734237] [2024-02-07 19:20:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:42,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:43,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:43,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275734237] [2024-02-07 19:20:43,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275734237] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:43,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:43,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:20:43,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965148221] [2024-02-07 19:20:43,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:43,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:20:43,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:20:43,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:20:43,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-02-07 19:20:43,057 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 19:20:43,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:43,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-02-07 19:20:43,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:43,144 INFO L124 PetriNetUnfolderBase]: 171/320 cut-off events. [2024-02-07 19:20:43,144 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-02-07 19:20:43,144 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 19:20:43,146 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 36 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-02-07 19:20:43,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 174 flow [2024-02-07 19:20:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:20:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:20:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-02-07 19:20:43,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-02-07 19:20:43,148 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 62 flow. Second operand 4 states and 64 transitions. [2024-02-07 19:20:43,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 174 flow [2024-02-07 19:20:43,151 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 19:20:43,151 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 62 flow [2024-02-07 19:20:43,152 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 19:20:43,153 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-02-07 19:20:43,153 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 62 flow [2024-02-07 19:20:43,153 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 19:20:43,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:43,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:43,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-07 19:20:43,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 19:20:43,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:43,154 INFO L85 PathProgramCache]: Analyzing trace with hash -972116303, now seen corresponding path program 1 times [2024-02-07 19:20:43,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:43,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291787241] [2024-02-07 19:20:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:43,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:43,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:43,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291787241] [2024-02-07 19:20:43,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291787241] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:43,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:43,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:43,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097639299] [2024-02-07 19:20:43,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:43,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:20:43,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:20:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:20:43,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 19:20:43,234 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 19:20:43,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:43,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 19:20:43,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:43,286 INFO L124 PetriNetUnfolderBase]: 171/334 cut-off events. [2024-02-07 19:20:43,287 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-02-07 19:20:43,287 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 19:20:43,288 INFO L140 encePairwiseOnDemand]: 28/31 looper letters, 29 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2024-02-07 19:20:43,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 145 flow [2024-02-07 19:20:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-02-07 19:20:43,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-02-07 19:20:43,291 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 62 flow. Second operand 3 states and 53 transitions. [2024-02-07 19:20:43,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 145 flow [2024-02-07 19:20:43,292 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 19:20:43,293 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 56 flow [2024-02-07 19:20:43,293 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 19:20:43,295 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2024-02-07 19:20:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 56 flow [2024-02-07 19:20:43,295 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 19:20:43,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:43,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:43,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-07 19:20:43,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 19:20:43,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash -70834076, now seen corresponding path program 1 times [2024-02-07 19:20:43,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:43,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654270699] [2024-02-07 19:20:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:43,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:43,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:43,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654270699] [2024-02-07 19:20:43,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654270699] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:43,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:43,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-02-07 19:20:43,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207278558] [2024-02-07 19:20:43,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:43,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-07 19:20:43,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:43,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-07 19:20:43,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-07 19:20:43,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-02-07 19:20:43,364 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 19:20:43,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:43,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-02-07 19:20:43,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:43,439 INFO L124 PetriNetUnfolderBase]: 229/438 cut-off events. [2024-02-07 19:20:43,439 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-07 19:20:43,440 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 19:20:43,444 INFO L140 encePairwiseOnDemand]: 29/31 looper letters, 33 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2024-02-07 19:20:43,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2024-02-07 19:20:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-07 19:20:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-07 19:20:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-02-07 19:20:43,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6344086021505376 [2024-02-07 19:20:43,447 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 56 flow. Second operand 3 states and 59 transitions. [2024-02-07 19:20:43,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2024-02-07 19:20:43,448 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 19:20:43,448 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 60 flow [2024-02-07 19:20:43,449 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 19:20:43,450 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-02-07 19:20:43,450 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 60 flow [2024-02-07 19:20:43,451 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 19:20:43,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:43,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:43,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-07 19:20:43,451 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT === [thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT, thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (and 12 more)] === [2024-02-07 19:20:43,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash -70833053, now seen corresponding path program 1 times [2024-02-07 19:20:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:43,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268707875] [2024-02-07 19:20:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:43,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:43,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268707875] [2024-02-07 19:20:43,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268707875] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:43,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:43,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-07 19:20:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789171108] [2024-02-07 19:20:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-02-07 19:20:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-02-07 19:20:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-02-07 19:20:43,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-02-07 19:20:43,507 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 19:20:43,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:43,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-02-07 19:20:43,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:43,579 INFO L124 PetriNetUnfolderBase]: 203/392 cut-off events. [2024-02-07 19:20:43,579 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-02-07 19:20:43,580 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 19:20:43,581 INFO L140 encePairwiseOnDemand]: 27/31 looper letters, 36 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2024-02-07 19:20:43,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 180 flow [2024-02-07 19:20:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-02-07 19:20:43,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-02-07 19:20:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-02-07 19:20:43,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5161290322580645 [2024-02-07 19:20:43,582 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 60 flow. Second operand 4 states and 64 transitions. [2024-02-07 19:20:43,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 180 flow [2024-02-07 19:20:43,584 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 19:20:43,584 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 60 flow [2024-02-07 19:20:43,585 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 19:20:43,587 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -2 predicate places. [2024-02-07 19:20:43,587 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 60 flow [2024-02-07 19:20:43,587 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 19:20:43,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:43,587 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 19:20:43,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-07 19:20:43,588 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 19:20:43,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash -828502913, now seen corresponding path program 1 times [2024-02-07 19:20:43,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:43,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118662940] [2024-02-07 19:20:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:43,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:43,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:43,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118662940] [2024-02-07 19:20:43,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118662940] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:43,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:43,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:20:43,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297619502] [2024-02-07 19:20:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:20:43,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:43,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:20:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:20:43,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 19:20:43,788 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 19:20:43,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:43,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 19:20:43,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:43,939 INFO L124 PetriNetUnfolderBase]: 205/403 cut-off events. [2024-02-07 19:20:43,940 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-02-07 19:20:43,940 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 19:20:43,941 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 51 selfloop transitions, 8 changer transitions 10/70 dead transitions. [2024-02-07 19:20:43,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 70 transitions, 330 flow [2024-02-07 19:20:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:20:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:20:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-02-07 19:20:43,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080645161290323 [2024-02-07 19:20:43,943 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 60 flow. Second operand 8 states and 126 transitions. [2024-02-07 19:20:43,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 70 transitions, 330 flow [2024-02-07 19:20:43,944 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 19:20:43,944 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 107 flow [2024-02-07 19:20:43,945 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 19:20:43,945 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2024-02-07 19:20:43,945 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 107 flow [2024-02-07 19:20:43,945 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 19:20:43,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:43,946 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 19:20:43,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-07 19:20:43,946 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 19:20:43,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 581456629, now seen corresponding path program 2 times [2024-02-07 19:20:43,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:43,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065244942] [2024-02-07 19:20:43,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:43,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:44,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:44,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065244942] [2024-02-07 19:20:44,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065244942] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:44,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:44,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:20:44,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213690988] [2024-02-07 19:20:44,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:44,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:20:44,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:44,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:20:44,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:20:44,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 19:20:44,070 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 19:20:44,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:44,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 19:20:44,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:44,204 INFO L124 PetriNetUnfolderBase]: 204/413 cut-off events. [2024-02-07 19:20:44,204 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2024-02-07 19:20:44,205 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 19:20:44,206 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 56 selfloop transitions, 15 changer transitions 6/78 dead transitions. [2024-02-07 19:20:44,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 434 flow [2024-02-07 19:20:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:20:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:20:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-02-07 19:20:44,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-02-07 19:20:44,207 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 107 flow. Second operand 9 states and 135 transitions. [2024-02-07 19:20:44,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 434 flow [2024-02-07 19:20:44,209 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 19:20:44,210 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 210 flow [2024-02-07 19:20:44,210 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 19:20:44,210 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 17 predicate places. [2024-02-07 19:20:44,210 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 210 flow [2024-02-07 19:20:44,211 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 19:20:44,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:44,211 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 19:20:44,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-07 19:20:44,211 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 19:20:44,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:44,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1970302350, now seen corresponding path program 1 times [2024-02-07 19:20:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:44,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494853965] [2024-02-07 19:20:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:44,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:44,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:44,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494853965] [2024-02-07 19:20:44,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494853965] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:44,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:44,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:44,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085995308] [2024-02-07 19:20:44,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:44,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:44,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:44,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:44,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:44,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:44,350 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 19:20:44,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:44,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:44,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:44,671 INFO L124 PetriNetUnfolderBase]: 231/505 cut-off events. [2024-02-07 19:20:44,671 INFO L125 PetriNetUnfolderBase]: For 429/429 co-relation queries the response was YES. [2024-02-07 19:20:44,673 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 19:20:44,674 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 75 selfloop transitions, 24 changer transitions 15/115 dead transitions. [2024-02-07 19:20:44,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 115 transitions, 708 flow [2024-02-07 19:20:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-02-07 19:20:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-02-07 19:20:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 183 transitions. [2024-02-07 19:20:44,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-02-07 19:20:44,675 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 210 flow. Second operand 15 states and 183 transitions. [2024-02-07 19:20:44,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 115 transitions, 708 flow [2024-02-07 19:20:44,678 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 19:20:44,679 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 347 flow [2024-02-07 19:20:44,679 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 19:20:44,680 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 36 predicate places. [2024-02-07 19:20:44,680 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 347 flow [2024-02-07 19:20:44,680 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 19:20:44,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:44,680 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 19:20:44,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-07 19:20:44,680 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 19:20:44,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:44,681 INFO L85 PathProgramCache]: Analyzing trace with hash -840619170, now seen corresponding path program 2 times [2024-02-07 19:20:44,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:44,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419610956] [2024-02-07 19:20:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:44,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:44,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:44,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419610956] [2024-02-07 19:20:44,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419610956] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:44,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:44,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:44,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274819176] [2024-02-07 19:20:44,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:44,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:44,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:44,825 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 19:20:44,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:44,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:44,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:44,991 INFO L124 PetriNetUnfolderBase]: 224/491 cut-off events. [2024-02-07 19:20:44,991 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-02-07 19:20:44,993 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 19:20:44,995 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 53 selfloop transitions, 35 changer transitions 6/95 dead transitions. [2024-02-07 19:20:44,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 95 transitions, 748 flow [2024-02-07 19:20:44,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-02-07 19:20:44,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-02-07 19:20:44,997 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 347 flow. Second operand 11 states and 127 transitions. [2024-02-07 19:20:44,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 95 transitions, 748 flow [2024-02-07 19:20:45,002 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 19:20:45,004 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 492 flow [2024-02-07 19:20:45,004 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 19:20:45,004 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 41 predicate places. [2024-02-07 19:20:45,005 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 492 flow [2024-02-07 19:20:45,005 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 19:20:45,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:45,005 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 19:20:45,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-07 19:20:45,006 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 19:20:45,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:45,006 INFO L85 PathProgramCache]: Analyzing trace with hash -798026720, now seen corresponding path program 3 times [2024-02-07 19:20:45,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:45,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006791257] [2024-02-07 19:20:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:45,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:45,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006791257] [2024-02-07 19:20:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006791257] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:45,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:45,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:45,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861538283] [2024-02-07 19:20:45,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:45,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:45,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:45,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:45,132 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 19:20:45,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:45,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:45,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:45,324 INFO L124 PetriNetUnfolderBase]: 231/510 cut-off events. [2024-02-07 19:20:45,325 INFO L125 PetriNetUnfolderBase]: For 905/905 co-relation queries the response was YES. [2024-02-07 19:20:45,326 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 19:20:45,327 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 51 selfloop transitions, 26 changer transitions 19/97 dead transitions. [2024-02-07 19:20:45,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 97 transitions, 812 flow [2024-02-07 19:20:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:20:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:20:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-02-07 19:20:45,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-02-07 19:20:45,329 INFO L175 Difference]: Start difference. First operand has 74 places, 56 transitions, 492 flow. Second operand 9 states and 120 transitions. [2024-02-07 19:20:45,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 97 transitions, 812 flow [2024-02-07 19:20:45,333 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 19:20:45,334 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 496 flow [2024-02-07 19:20:45,335 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 19:20:45,335 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2024-02-07 19:20:45,335 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 496 flow [2024-02-07 19:20:45,335 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 19:20:45,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:45,336 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 19:20:45,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-02-07 19:20:45,336 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 19:20:45,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:45,336 INFO L85 PathProgramCache]: Analyzing trace with hash -396713507, now seen corresponding path program 3 times [2024-02-07 19:20:45,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:45,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677158472] [2024-02-07 19:20:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:45,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:45,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:45,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677158472] [2024-02-07 19:20:45,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677158472] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:45,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:45,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:20:45,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987228321] [2024-02-07 19:20:45,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:45,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:20:45,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:45,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:20:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:20:45,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 19:20:45,443 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 19:20:45,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:45,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 19:20:45,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:45,577 INFO L124 PetriNetUnfolderBase]: 213/461 cut-off events. [2024-02-07 19:20:45,577 INFO L125 PetriNetUnfolderBase]: For 888/888 co-relation queries the response was YES. [2024-02-07 19:20:45,578 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 19:20:45,580 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 51 selfloop transitions, 19 changer transitions 14/85 dead transitions. [2024-02-07 19:20:45,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 85 transitions, 760 flow [2024-02-07 19:20:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:20:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:20:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-02-07 19:20:45,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879032258064516 [2024-02-07 19:20:45,581 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 496 flow. Second operand 8 states and 121 transitions. [2024-02-07 19:20:45,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 85 transitions, 760 flow [2024-02-07 19:20:45,585 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 19:20:45,586 INFO L231 Difference]: Finished difference. Result has 79 places, 49 transitions, 419 flow [2024-02-07 19:20:45,586 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 19:20:45,587 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2024-02-07 19:20:45,587 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 49 transitions, 419 flow [2024-02-07 19:20:45,587 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 19:20:45,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:45,587 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 19:20:45,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-02-07 19:20:45,588 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 19:20:45,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:45,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1488183740, now seen corresponding path program 4 times [2024-02-07 19:20:45,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:45,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993888971] [2024-02-07 19:20:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:45,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:45,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:45,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993888971] [2024-02-07 19:20:45,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993888971] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:45,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:45,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:45,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688651186] [2024-02-07 19:20:45,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:45,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:45,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:45,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:45,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:45,727 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 19:20:45,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:45,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:45,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:45,897 INFO L124 PetriNetUnfolderBase]: 209/448 cut-off events. [2024-02-07 19:20:45,898 INFO L125 PetriNetUnfolderBase]: For 752/752 co-relation queries the response was YES. [2024-02-07 19:20:45,899 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 19:20:45,900 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 51 selfloop transitions, 24 changer transitions 13/89 dead transitions. [2024-02-07 19:20:45,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 89 transitions, 718 flow [2024-02-07 19:20:45,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-02-07 19:20:45,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-02-07 19:20:45,901 INFO L175 Difference]: Start difference. First operand has 79 places, 49 transitions, 419 flow. Second operand 10 states and 122 transitions. [2024-02-07 19:20:45,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 89 transitions, 718 flow [2024-02-07 19:20:45,905 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 19:20:45,906 INFO L231 Difference]: Finished difference. Result has 81 places, 49 transitions, 456 flow [2024-02-07 19:20:45,906 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 19:20:45,906 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2024-02-07 19:20:45,907 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 49 transitions, 456 flow [2024-02-07 19:20:45,907 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 19:20:45,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:45,907 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 19:20:45,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-02-07 19:20:45,907 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 19:20:45,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash -437102862, now seen corresponding path program 5 times [2024-02-07 19:20:45,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:45,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019192292] [2024-02-07 19:20:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:45,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:46,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:46,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019192292] [2024-02-07 19:20:46,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019192292] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:46,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:46,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:46,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905339314] [2024-02-07 19:20:46,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:46,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:46,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:46,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:46,034 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 19:20:46,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:46,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:46,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:46,211 INFO L124 PetriNetUnfolderBase]: 192/408 cut-off events. [2024-02-07 19:20:46,211 INFO L125 PetriNetUnfolderBase]: For 847/847 co-relation queries the response was YES. [2024-02-07 19:20:46,212 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 19:20:46,213 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 54 selfloop transitions, 20 changer transitions 14/89 dead transitions. [2024-02-07 19:20:46,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 745 flow [2024-02-07 19:20:46,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-02-07 19:20:46,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-02-07 19:20:46,214 INFO L175 Difference]: Start difference. First operand has 81 places, 49 transitions, 456 flow. Second operand 10 states and 127 transitions. [2024-02-07 19:20:46,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 745 flow [2024-02-07 19:20:46,218 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 19:20:46,219 INFO L231 Difference]: Finished difference. Result has 84 places, 47 transitions, 450 flow [2024-02-07 19:20:46,219 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 19:20:46,219 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 51 predicate places. [2024-02-07 19:20:46,219 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 47 transitions, 450 flow [2024-02-07 19:20:46,220 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 19:20:46,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:46,220 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 19:20:46,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-02-07 19:20:46,220 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 19:20:46,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:46,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1523616886, now seen corresponding path program 6 times [2024-02-07 19:20:46,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:46,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842561732] [2024-02-07 19:20:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:46,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842561732] [2024-02-07 19:20:46,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842561732] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:46,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:46,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:46,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483737699] [2024-02-07 19:20:46,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:46,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:46,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:46,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:46,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:46,338 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 19:20:46,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:46,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:46,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:46,515 INFO L124 PetriNetUnfolderBase]: 175/368 cut-off events. [2024-02-07 19:20:46,516 INFO L125 PetriNetUnfolderBase]: For 821/821 co-relation queries the response was YES. [2024-02-07 19:20:46,517 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 19:20:46,518 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 43 selfloop transitions, 16 changer transitions 17/77 dead transitions. [2024-02-07 19:20:46,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 77 transitions, 684 flow [2024-02-07 19:20:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:20:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:20:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-02-07 19:20:46,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-02-07 19:20:46,519 INFO L175 Difference]: Start difference. First operand has 84 places, 47 transitions, 450 flow. Second operand 9 states and 110 transitions. [2024-02-07 19:20:46,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 77 transitions, 684 flow [2024-02-07 19:20:46,522 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 19:20:46,523 INFO L231 Difference]: Finished difference. Result has 80 places, 42 transitions, 375 flow [2024-02-07 19:20:46,523 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 19:20:46,524 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 47 predicate places. [2024-02-07 19:20:46,524 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 42 transitions, 375 flow [2024-02-07 19:20:46,524 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 19:20:46,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:46,524 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 19:20:46,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-02-07 19:20:46,525 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 19:20:46,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash -2144620339, now seen corresponding path program 4 times [2024-02-07 19:20:46,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:46,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780626647] [2024-02-07 19:20:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:46,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:46,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:46,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780626647] [2024-02-07 19:20:46,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780626647] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:46,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:46,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:20:46,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513706647] [2024-02-07 19:20:46,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:46,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:20:46,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:20:46,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:20:46,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 19:20:46,625 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 19:20:46,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:46,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 19:20:46,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:46,772 INFO L124 PetriNetUnfolderBase]: 166/347 cut-off events. [2024-02-07 19:20:46,773 INFO L125 PetriNetUnfolderBase]: For 666/666 co-relation queries the response was YES. [2024-02-07 19:20:46,773 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 19:20:46,774 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 53 selfloop transitions, 14 changer transitions 8/76 dead transitions. [2024-02-07 19:20:46,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 76 transitions, 623 flow [2024-02-07 19:20:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:20:46,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:20:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-02-07 19:20:46,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49193548387096775 [2024-02-07 19:20:46,776 INFO L175 Difference]: Start difference. First operand has 80 places, 42 transitions, 375 flow. Second operand 8 states and 122 transitions. [2024-02-07 19:20:46,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 76 transitions, 623 flow [2024-02-07 19:20:46,778 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 19:20:46,779 INFO L231 Difference]: Finished difference. Result has 73 places, 42 transitions, 346 flow [2024-02-07 19:20:46,779 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 19:20:46,779 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 40 predicate places. [2024-02-07 19:20:46,780 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 42 transitions, 346 flow [2024-02-07 19:20:46,780 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 19:20:46,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:46,780 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 19:20:46,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-02-07 19:20:46,780 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 19:20:46,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:46,781 INFO L85 PathProgramCache]: Analyzing trace with hash -378704953, now seen corresponding path program 5 times [2024-02-07 19:20:46,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:46,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342067708] [2024-02-07 19:20:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:46,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:46,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:46,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342067708] [2024-02-07 19:20:46,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342067708] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:46,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:46,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-02-07 19:20:46,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592153786] [2024-02-07 19:20:46,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:46,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-02-07 19:20:46,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:46,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-02-07 19:20:46,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-02-07 19:20:46,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-02-07 19:20:46,879 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 19:20:46,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:46,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-02-07 19:20:46,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:47,005 INFO L124 PetriNetUnfolderBase]: 164/336 cut-off events. [2024-02-07 19:20:47,005 INFO L125 PetriNetUnfolderBase]: For 593/593 co-relation queries the response was YES. [2024-02-07 19:20:47,006 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 19:20:47,007 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 48 selfloop transitions, 12 changer transitions 11/72 dead transitions. [2024-02-07 19:20:47,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 563 flow [2024-02-07 19:20:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:20:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:20:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-02-07 19:20:47,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2024-02-07 19:20:47,008 INFO L175 Difference]: Start difference. First operand has 73 places, 42 transitions, 346 flow. Second operand 8 states and 120 transitions. [2024-02-07 19:20:47,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 563 flow [2024-02-07 19:20:47,010 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 19:20:47,011 INFO L231 Difference]: Finished difference. Result has 74 places, 39 transitions, 300 flow [2024-02-07 19:20:47,011 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 19:20:47,011 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 41 predicate places. [2024-02-07 19:20:47,011 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 39 transitions, 300 flow [2024-02-07 19:20:47,011 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 19:20:47,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:47,012 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 19:20:47,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-02-07 19:20:47,012 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 19:20:47,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1402573638, now seen corresponding path program 7 times [2024-02-07 19:20:47,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:47,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231751812] [2024-02-07 19:20:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:47,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:47,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:47,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231751812] [2024-02-07 19:20:47,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231751812] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:47,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:47,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:47,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508810923] [2024-02-07 19:20:47,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:47,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:47,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:47,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:47,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:47,131 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 19:20:47,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:47,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:47,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:47,320 INFO L124 PetriNetUnfolderBase]: 160/328 cut-off events. [2024-02-07 19:20:47,320 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2024-02-07 19:20:47,321 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 19:20:47,322 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 55 selfloop transitions, 16 changer transitions 7/79 dead transitions. [2024-02-07 19:20:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 563 flow [2024-02-07 19:20:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-02-07 19:20:47,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-02-07 19:20:47,323 INFO L175 Difference]: Start difference. First operand has 74 places, 39 transitions, 300 flow. Second operand 11 states and 129 transitions. [2024-02-07 19:20:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 563 flow [2024-02-07 19:20:47,325 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 19:20:47,326 INFO L231 Difference]: Finished difference. Result has 76 places, 39 transitions, 313 flow [2024-02-07 19:20:47,326 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 19:20:47,326 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 43 predicate places. [2024-02-07 19:20:47,326 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 39 transitions, 313 flow [2024-02-07 19:20:47,326 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 19:20:47,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:47,327 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 19:20:47,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-02-07 19:20:47,327 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 19:20:47,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1661075474, now seen corresponding path program 8 times [2024-02-07 19:20:47,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:47,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700586896] [2024-02-07 19:20:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:47,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:47,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700586896] [2024-02-07 19:20:47,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700586896] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:47,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:47,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:47,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389185596] [2024-02-07 19:20:47,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:47,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:47,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:47,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:47,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:47,436 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 19:20:47,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:47,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:47,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:47,612 INFO L124 PetriNetUnfolderBase]: 158/326 cut-off events. [2024-02-07 19:20:47,612 INFO L125 PetriNetUnfolderBase]: For 623/623 co-relation queries the response was YES. [2024-02-07 19:20:47,613 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 19:20:47,614 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 45 selfloop transitions, 19 changer transitions 8/73 dead transitions. [2024-02-07 19:20:47,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 544 flow [2024-02-07 19:20:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-02-07 19:20:47,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-02-07 19:20:47,615 INFO L175 Difference]: Start difference. First operand has 76 places, 39 transitions, 313 flow. Second operand 10 states and 115 transitions. [2024-02-07 19:20:47,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 544 flow [2024-02-07 19:20:47,617 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 19:20:47,618 INFO L231 Difference]: Finished difference. Result has 78 places, 38 transitions, 302 flow [2024-02-07 19:20:47,618 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 19:20:47,618 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 45 predicate places. [2024-02-07 19:20:47,618 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 38 transitions, 302 flow [2024-02-07 19:20:47,619 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 19:20:47,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:47,619 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 19:20:47,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-02-07 19:20:47,619 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 19:20:47,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:47,620 INFO L85 PathProgramCache]: Analyzing trace with hash 104839912, now seen corresponding path program 9 times [2024-02-07 19:20:47,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:47,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547575935] [2024-02-07 19:20:47,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:47,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:47,730 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 19:20:47,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:47,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547575935] [2024-02-07 19:20:47,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547575935] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:47,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:47,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:47,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899679698] [2024-02-07 19:20:47,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:47,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:47,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:47,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:47,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:47,742 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 19:20:47,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:47,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:47,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:47,920 INFO L124 PetriNetUnfolderBase]: 156/315 cut-off events. [2024-02-07 19:20:47,920 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2024-02-07 19:20:47,921 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 19:20:47,922 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 42 selfloop transitions, 15 changer transitions 11/69 dead transitions. [2024-02-07 19:20:47,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 69 transitions, 511 flow [2024-02-07 19:20:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-02-07 19:20:47,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-02-07 19:20:47,923 INFO L175 Difference]: Start difference. First operand has 78 places, 38 transitions, 302 flow. Second operand 10 states and 113 transitions. [2024-02-07 19:20:47,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 69 transitions, 511 flow [2024-02-07 19:20:47,925 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 19:20:47,926 INFO L231 Difference]: Finished difference. Result has 75 places, 35 transitions, 244 flow [2024-02-07 19:20:47,926 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 19:20:47,927 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2024-02-07 19:20:47,927 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 35 transitions, 244 flow [2024-02-07 19:20:47,927 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 19:20:47,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:47,927 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 19:20:47,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-02-07 19:20:47,927 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 19:20:47,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1363110848, now seen corresponding path program 10 times [2024-02-07 19:20:47,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:47,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975539646] [2024-02-07 19:20:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:48,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:48,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975539646] [2024-02-07 19:20:48,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975539646] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:48,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:48,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:48,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85404818] [2024-02-07 19:20:48,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:48,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:48,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:48,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:48,038 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 19:20:48,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:48,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:48,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:48,202 INFO L124 PetriNetUnfolderBase]: 153/301 cut-off events. [2024-02-07 19:20:48,202 INFO L125 PetriNetUnfolderBase]: For 477/477 co-relation queries the response was YES. [2024-02-07 19:20:48,203 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 19:20:48,204 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 35 selfloop transitions, 9 changer transitions 18/63 dead transitions. [2024-02-07 19:20:48,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 433 flow [2024-02-07 19:20:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:20:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:20:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-02-07 19:20:48,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-02-07 19:20:48,205 INFO L175 Difference]: Start difference. First operand has 75 places, 35 transitions, 244 flow. Second operand 9 states and 104 transitions. [2024-02-07 19:20:48,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 433 flow [2024-02-07 19:20:48,206 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 19:20:48,207 INFO L231 Difference]: Finished difference. Result has 70 places, 30 transitions, 193 flow [2024-02-07 19:20:48,207 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 19:20:48,207 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 37 predicate places. [2024-02-07 19:20:48,207 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 30 transitions, 193 flow [2024-02-07 19:20:48,208 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 19:20:48,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:48,208 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 19:20:48,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-02-07 19:20:48,208 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 19:20:48,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:48,209 INFO L85 PathProgramCache]: Analyzing trace with hash 947168326, now seen corresponding path program 1 times [2024-02-07 19:20:48,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:48,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120576314] [2024-02-07 19:20:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:48,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:48,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:48,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120576314] [2024-02-07 19:20:48,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120576314] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:48,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:48,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982977280] [2024-02-07 19:20:48,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:48,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:48,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:48,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:48,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:48,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:48,319 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 19:20:48,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:48,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:48,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:48,490 INFO L124 PetriNetUnfolderBase]: 122/255 cut-off events. [2024-02-07 19:20:48,491 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2024-02-07 19:20:48,491 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 19:20:48,492 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 51 selfloop transitions, 19 changer transitions 6/77 dead transitions. [2024-02-07 19:20:48,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 575 flow [2024-02-07 19:20:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-02-07 19:20:48,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-02-07 19:20:48,493 INFO L175 Difference]: Start difference. First operand has 70 places, 30 transitions, 193 flow. Second operand 11 states and 125 transitions. [2024-02-07 19:20:48,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 575 flow [2024-02-07 19:20:48,494 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 19:20:48,495 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 287 flow [2024-02-07 19:20:48,495 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 19:20:48,495 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 26 predicate places. [2024-02-07 19:20:48,495 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 287 flow [2024-02-07 19:20:48,496 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 19:20:48,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:48,496 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 19:20:48,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-02-07 19:20:48,496 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 19:20:48,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1598817516, now seen corresponding path program 2 times [2024-02-07 19:20:48,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:48,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926145199] [2024-02-07 19:20:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:48,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:48,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:48,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926145199] [2024-02-07 19:20:48,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926145199] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:48,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:48,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:48,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618162207] [2024-02-07 19:20:48,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:48,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:48,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:48,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:48,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:48,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:48,602 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 19:20:48,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:48,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:48,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:48,775 INFO L124 PetriNetUnfolderBase]: 133/296 cut-off events. [2024-02-07 19:20:48,775 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-02-07 19:20:48,775 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 19:20:48,776 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 56 selfloop transitions, 22 changer transitions 6/85 dead transitions. [2024-02-07 19:20:48,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 640 flow [2024-02-07 19:20:48,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:48,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:48,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-02-07 19:20:48,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-02-07 19:20:48,778 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 287 flow. Second operand 11 states and 131 transitions. [2024-02-07 19:20:48,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 640 flow [2024-02-07 19:20:48,779 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 19:20:48,780 INFO L231 Difference]: Finished difference. Result has 72 places, 46 transitions, 415 flow [2024-02-07 19:20:48,780 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 19:20:48,780 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2024-02-07 19:20:48,780 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 46 transitions, 415 flow [2024-02-07 19:20:48,780 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 19:20:48,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:48,781 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 19:20:48,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-02-07 19:20:48,781 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 19:20:48,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:48,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1103178148, now seen corresponding path program 3 times [2024-02-07 19:20:48,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:48,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077235215] [2024-02-07 19:20:48,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:48,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:48,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:48,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077235215] [2024-02-07 19:20:48,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077235215] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:48,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:48,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:48,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837048845] [2024-02-07 19:20:48,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:48,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:48,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:48,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:48,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:48,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:48,888 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 19:20:48,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:48,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:48,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:49,043 INFO L124 PetriNetUnfolderBase]: 133/298 cut-off events. [2024-02-07 19:20:49,043 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-02-07 19:20:49,043 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 19:20:49,044 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 44 selfloop transitions, 23 changer transitions 10/78 dead transitions. [2024-02-07 19:20:49,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 78 transitions, 666 flow [2024-02-07 19:20:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:49,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:49,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-02-07 19:20:49,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-02-07 19:20:49,045 INFO L175 Difference]: Start difference. First operand has 72 places, 46 transitions, 415 flow. Second operand 10 states and 112 transitions. [2024-02-07 19:20:49,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 78 transitions, 666 flow [2024-02-07 19:20:49,047 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 19:20:49,056 INFO L231 Difference]: Finished difference. Result has 77 places, 45 transitions, 417 flow [2024-02-07 19:20:49,057 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 19:20:49,057 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 44 predicate places. [2024-02-07 19:20:49,057 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 45 transitions, 417 flow [2024-02-07 19:20:49,057 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 19:20:49,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:49,058 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 19:20:49,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-02-07 19:20:49,058 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 19:20:49,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1486524048, now seen corresponding path program 4 times [2024-02-07 19:20:49,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:49,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532956729] [2024-02-07 19:20:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:49,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:49,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:49,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532956729] [2024-02-07 19:20:49,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532956729] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:49,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:49,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:49,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808485882] [2024-02-07 19:20:49,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:49,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:49,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:49,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:49,161 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 19:20:49,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:49,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:49,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:49,323 INFO L124 PetriNetUnfolderBase]: 126/296 cut-off events. [2024-02-07 19:20:49,323 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2024-02-07 19:20:49,324 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 19:20:49,325 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 57 selfloop transitions, 22 changer transitions 7/87 dead transitions. [2024-02-07 19:20:49,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 87 transitions, 724 flow [2024-02-07 19:20:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-02-07 19:20:49,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-02-07 19:20:49,326 INFO L175 Difference]: Start difference. First operand has 77 places, 45 transitions, 417 flow. Second operand 11 states and 130 transitions. [2024-02-07 19:20:49,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 87 transitions, 724 flow [2024-02-07 19:20:49,327 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 19:20:49,328 INFO L231 Difference]: Finished difference. Result has 81 places, 47 transitions, 432 flow [2024-02-07 19:20:49,329 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 19:20:49,329 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2024-02-07 19:20:49,329 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 47 transitions, 432 flow [2024-02-07 19:20:49,329 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 19:20:49,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:49,329 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 19:20:49,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-02-07 19:20:49,330 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 19:20:49,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1428637680, now seen corresponding path program 5 times [2024-02-07 19:20:49,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356498454] [2024-02-07 19:20:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:49,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:49,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:49,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356498454] [2024-02-07 19:20:49,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356498454] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:49,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:49,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:49,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332730531] [2024-02-07 19:20:49,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:49,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:49,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:49,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:49,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:49,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:49,429 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 19:20:49,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:49,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:49,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:49,589 INFO L124 PetriNetUnfolderBase]: 124/285 cut-off events. [2024-02-07 19:20:49,589 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2024-02-07 19:20:49,590 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 19:20:49,591 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 41 selfloop transitions, 22 changer transitions 13/77 dead transitions. [2024-02-07 19:20:49,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 77 transitions, 660 flow [2024-02-07 19:20:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-02-07 19:20:49,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-02-07 19:20:49,592 INFO L175 Difference]: Start difference. First operand has 81 places, 47 transitions, 432 flow. Second operand 10 states and 112 transitions. [2024-02-07 19:20:49,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 77 transitions, 660 flow [2024-02-07 19:20:49,594 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 19:20:49,595 INFO L231 Difference]: Finished difference. Result has 84 places, 44 transitions, 405 flow [2024-02-07 19:20:49,595 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 19:20:49,595 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 51 predicate places. [2024-02-07 19:20:49,595 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 44 transitions, 405 flow [2024-02-07 19:20:49,595 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 19:20:49,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:49,596 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 19:20:49,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-02-07 19:20:49,596 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 19:20:49,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash -768670219, now seen corresponding path program 1 times [2024-02-07 19:20:49,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:49,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743288269] [2024-02-07 19:20:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:49,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:49,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:49,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743288269] [2024-02-07 19:20:49,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743288269] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:49,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:49,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757862131] [2024-02-07 19:20:49,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:49,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:49,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:49,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:49,718 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 19:20:49,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:49,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:49,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:49,919 INFO L124 PetriNetUnfolderBase]: 132/319 cut-off events. [2024-02-07 19:20:49,919 INFO L125 PetriNetUnfolderBase]: For 676/676 co-relation queries the response was YES. [2024-02-07 19:20:49,920 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 19:20:49,921 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 53 selfloop transitions, 30 changer transitions 7/91 dead transitions. [2024-02-07 19:20:49,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 791 flow [2024-02-07 19:20:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 19:20:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 19:20:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 114 transitions. [2024-02-07 19:20:49,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28287841191067 [2024-02-07 19:20:49,923 INFO L175 Difference]: Start difference. First operand has 84 places, 44 transitions, 405 flow. Second operand 13 states and 114 transitions. [2024-02-07 19:20:49,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 791 flow [2024-02-07 19:20:49,925 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 19:20:49,926 INFO L231 Difference]: Finished difference. Result has 90 places, 50 transitions, 532 flow [2024-02-07 19:20:49,926 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 19:20:49,926 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 57 predicate places. [2024-02-07 19:20:49,927 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 50 transitions, 532 flow [2024-02-07 19:20:49,927 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 19:20:49,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:49,927 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 19:20:49,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-02-07 19:20:49,927 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 19:20:49,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash -346024523, now seen corresponding path program 2 times [2024-02-07 19:20:49,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:49,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669678195] [2024-02-07 19:20:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:49,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:50,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:50,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669678195] [2024-02-07 19:20:50,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669678195] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:50,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:50,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086439325] [2024-02-07 19:20:50,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:50,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:50,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:50,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:50,042 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 19:20:50,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:50,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:50,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:50,239 INFO L124 PetriNetUnfolderBase]: 153/371 cut-off events. [2024-02-07 19:20:50,239 INFO L125 PetriNetUnfolderBase]: For 895/895 co-relation queries the response was YES. [2024-02-07 19:20:50,240 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 19:20:50,241 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 55 selfloop transitions, 34 changer transitions 10/100 dead transitions. [2024-02-07 19:20:50,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 100 transitions, 925 flow [2024-02-07 19:20:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 19:20:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 19:20:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2024-02-07 19:20:50,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29280397022332505 [2024-02-07 19:20:50,242 INFO L175 Difference]: Start difference. First operand has 90 places, 50 transitions, 532 flow. Second operand 13 states and 118 transitions. [2024-02-07 19:20:50,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 100 transitions, 925 flow [2024-02-07 19:20:50,245 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 19:20:50,246 INFO L231 Difference]: Finished difference. Result has 100 places, 56 transitions, 644 flow [2024-02-07 19:20:50,246 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 19:20:50,246 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 67 predicate places. [2024-02-07 19:20:50,246 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 56 transitions, 644 flow [2024-02-07 19:20:50,246 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 19:20:50,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:50,247 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 19:20:50,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-02-07 19:20:50,247 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 19:20:50,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash 606249431, now seen corresponding path program 3 times [2024-02-07 19:20:50,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:50,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282482940] [2024-02-07 19:20:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:50,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:50,363 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 19:20:50,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:50,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282482940] [2024-02-07 19:20:50,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282482940] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:50,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:50,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:50,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746267755] [2024-02-07 19:20:50,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:50,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:50,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:50,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:50,381 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 19:20:50,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:50,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:50,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:50,625 INFO L124 PetriNetUnfolderBase]: 221/533 cut-off events. [2024-02-07 19:20:50,625 INFO L125 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2024-02-07 19:20:50,626 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 19:20:50,628 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 73 selfloop transitions, 37 changer transitions 11/122 dead transitions. [2024-02-07 19:20:50,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 122 transitions, 1300 flow [2024-02-07 19:20:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 19:20:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 19:20:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 129 transitions. [2024-02-07 19:20:50,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3200992555831266 [2024-02-07 19:20:50,629 INFO L175 Difference]: Start difference. First operand has 100 places, 56 transitions, 644 flow. Second operand 13 states and 129 transitions. [2024-02-07 19:20:50,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 122 transitions, 1300 flow [2024-02-07 19:20:50,632 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 19:20:50,634 INFO L231 Difference]: Finished difference. Result has 112 places, 70 transitions, 921 flow [2024-02-07 19:20:50,634 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 19:20:50,634 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 79 predicate places. [2024-02-07 19:20:50,634 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 70 transitions, 921 flow [2024-02-07 19:20:50,635 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 19:20:50,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:50,635 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 19:20:50,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-02-07 19:20:50,635 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 19:20:50,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:50,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1354648332, now seen corresponding path program 6 times [2024-02-07 19:20:50,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:50,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306574778] [2024-02-07 19:20:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:50,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:50,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:50,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306574778] [2024-02-07 19:20:50,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306574778] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:50,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:50,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:50,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771018300] [2024-02-07 19:20:50,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:50,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:50,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:50,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:50,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:50,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:50,731 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 19:20:50,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:50,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:50,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:50,887 INFO L124 PetriNetUnfolderBase]: 212/500 cut-off events. [2024-02-07 19:20:50,887 INFO L125 PetriNetUnfolderBase]: For 1794/1794 co-relation queries the response was YES. [2024-02-07 19:20:50,888 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 19:20:50,890 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 59 selfloop transitions, 28 changer transitions 14/102 dead transitions. [2024-02-07 19:20:50,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 102 transitions, 1219 flow [2024-02-07 19:20:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-02-07 19:20:50,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774193548387096 [2024-02-07 19:20:50,891 INFO L175 Difference]: Start difference. First operand has 112 places, 70 transitions, 921 flow. Second operand 10 states and 114 transitions. [2024-02-07 19:20:50,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 102 transitions, 1219 flow [2024-02-07 19:20:50,896 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 19:20:50,897 INFO L231 Difference]: Finished difference. Result has 118 places, 65 transitions, 867 flow [2024-02-07 19:20:50,897 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 19:20:50,897 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 85 predicate places. [2024-02-07 19:20:50,897 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 65 transitions, 867 flow [2024-02-07 19:20:50,898 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 19:20:50,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:50,898 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 19:20:50,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-02-07 19:20:50,898 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 19:20:50,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash -548307953, now seen corresponding path program 4 times [2024-02-07 19:20:50,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:50,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187276198] [2024-02-07 19:20:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:50,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:51,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:51,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187276198] [2024-02-07 19:20:51,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187276198] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:51,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:51,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:51,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284983467] [2024-02-07 19:20:51,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:51,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:51,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:51,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:51,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:51,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:51,027 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 19:20:51,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:51,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:51,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:51,258 INFO L124 PetriNetUnfolderBase]: 203/496 cut-off events. [2024-02-07 19:20:51,258 INFO L125 PetriNetUnfolderBase]: For 1880/1880 co-relation queries the response was YES. [2024-02-07 19:20:51,259 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 19:20:51,261 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 77 selfloop transitions, 36 changer transitions 11/125 dead transitions. [2024-02-07 19:20:51,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 125 transitions, 1361 flow [2024-02-07 19:20:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 19:20:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 19:20:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 136 transitions. [2024-02-07 19:20:51,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.337468982630273 [2024-02-07 19:20:51,262 INFO L175 Difference]: Start difference. First operand has 118 places, 65 transitions, 867 flow. Second operand 13 states and 136 transitions. [2024-02-07 19:20:51,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 125 transitions, 1361 flow [2024-02-07 19:20:51,267 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 19:20:51,268 INFO L231 Difference]: Finished difference. Result has 125 places, 70 transitions, 992 flow [2024-02-07 19:20:51,269 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 19:20:51,269 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 92 predicate places. [2024-02-07 19:20:51,269 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 70 transitions, 992 flow [2024-02-07 19:20:51,269 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 19:20:51,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:51,269 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 19:20:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-02-07 19:20:51,270 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 19:20:51,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash -377910413, now seen corresponding path program 5 times [2024-02-07 19:20:51,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:51,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970426601] [2024-02-07 19:20:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:51,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:51,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:51,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970426601] [2024-02-07 19:20:51,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970426601] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:51,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:51,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:51,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092779773] [2024-02-07 19:20:51,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:51,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:51,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:51,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:51,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:51,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:51,382 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 19:20:51,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:51,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:51,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:51,573 INFO L124 PetriNetUnfolderBase]: 210/515 cut-off events. [2024-02-07 19:20:51,573 INFO L125 PetriNetUnfolderBase]: For 2142/2142 co-relation queries the response was YES. [2024-02-07 19:20:51,575 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 19:20:51,577 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 45 selfloop transitions, 39 changer transitions 20/105 dead transitions. [2024-02-07 19:20:51,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 105 transitions, 1306 flow [2024-02-07 19:20:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 99 transitions. [2024-02-07 19:20:51,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2024-02-07 19:20:51,578 INFO L175 Difference]: Start difference. First operand has 125 places, 70 transitions, 992 flow. Second operand 11 states and 99 transitions. [2024-02-07 19:20:51,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 105 transitions, 1306 flow [2024-02-07 19:20:51,586 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 19:20:51,587 INFO L231 Difference]: Finished difference. Result has 129 places, 68 transitions, 988 flow [2024-02-07 19:20:51,588 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 19:20:51,588 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 96 predicate places. [2024-02-07 19:20:51,588 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 68 transitions, 988 flow [2024-02-07 19:20:51,588 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 19:20:51,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:51,589 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 19:20:51,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-02-07 19:20:51,589 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 19:20:51,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:51,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1152917385, now seen corresponding path program 6 times [2024-02-07 19:20:51,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:51,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575706512] [2024-02-07 19:20:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:51,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:51,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:51,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575706512] [2024-02-07 19:20:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575706512] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:51,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029348140] [2024-02-07 19:20:51,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:51,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:51,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:51,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:51,724 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 19:20:51,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:51,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:51,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:51,938 INFO L124 PetriNetUnfolderBase]: 194/481 cut-off events. [2024-02-07 19:20:51,938 INFO L125 PetriNetUnfolderBase]: For 1916/1916 co-relation queries the response was YES. [2024-02-07 19:20:51,940 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 19:20:51,942 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 52 selfloop transitions, 36 changer transitions 15/104 dead transitions. [2024-02-07 19:20:51,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 104 transitions, 1297 flow [2024-02-07 19:20:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-02-07 19:20:51,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020527859237537 [2024-02-07 19:20:51,943 INFO L175 Difference]: Start difference. First operand has 129 places, 68 transitions, 988 flow. Second operand 11 states and 103 transitions. [2024-02-07 19:20:51,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 104 transitions, 1297 flow [2024-02-07 19:20:51,951 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 19:20:51,952 INFO L231 Difference]: Finished difference. Result has 127 places, 66 transitions, 954 flow [2024-02-07 19:20:51,952 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 19:20:51,953 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 94 predicate places. [2024-02-07 19:20:51,953 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 66 transitions, 954 flow [2024-02-07 19:20:51,953 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 19:20:51,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:51,953 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 19:20:51,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-02-07 19:20:51,954 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 19:20:51,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash -41961687, now seen corresponding path program 7 times [2024-02-07 19:20:51,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:51,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674522633] [2024-02-07 19:20:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:51,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674522633] [2024-02-07 19:20:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674522633] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:52,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:52,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:52,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80240932] [2024-02-07 19:20:52,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:52,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:52,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:52,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:52,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:52,083 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 19:20:52,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:52,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:52,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:52,280 INFO L124 PetriNetUnfolderBase]: 177/441 cut-off events. [2024-02-07 19:20:52,281 INFO L125 PetriNetUnfolderBase]: For 1767/1767 co-relation queries the response was YES. [2024-02-07 19:20:52,282 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 19:20:52,283 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 41 selfloop transitions, 34 changer transitions 19/95 dead transitions. [2024-02-07 19:20:52,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 95 transitions, 1221 flow [2024-02-07 19:20:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-02-07 19:20:52,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2785923753665689 [2024-02-07 19:20:52,284 INFO L175 Difference]: Start difference. First operand has 127 places, 66 transitions, 954 flow. Second operand 11 states and 95 transitions. [2024-02-07 19:20:52,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 95 transitions, 1221 flow [2024-02-07 19:20:52,289 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 19:20:52,290 INFO L231 Difference]: Finished difference. Result has 127 places, 62 transitions, 908 flow [2024-02-07 19:20:52,290 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 19:20:52,291 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 94 predicate places. [2024-02-07 19:20:52,291 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 62 transitions, 908 flow [2024-02-07 19:20:52,291 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 19:20:52,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:52,291 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 19:20:52,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-02-07 19:20:52,291 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 19:20:52,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash 840272566, now seen corresponding path program 7 times [2024-02-07 19:20:52,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:52,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139221846] [2024-02-07 19:20:52,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:52,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:52,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:52,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139221846] [2024-02-07 19:20:52,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139221846] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:52,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:52,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:52,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227941845] [2024-02-07 19:20:52,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:52,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:52,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:52,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:52,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:52,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:52,383 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 19:20:52,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:52,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:52,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:52,552 INFO L124 PetriNetUnfolderBase]: 169/414 cut-off events. [2024-02-07 19:20:52,552 INFO L125 PetriNetUnfolderBase]: For 1713/1713 co-relation queries the response was YES. [2024-02-07 19:20:52,554 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 19:20:52,555 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 43 selfloop transitions, 23 changer transitions 16/83 dead transitions. [2024-02-07 19:20:52,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 83 transitions, 1127 flow [2024-02-07 19:20:52,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:20:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:20:52,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-02-07 19:20:52,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-02-07 19:20:52,556 INFO L175 Difference]: Start difference. First operand has 127 places, 62 transitions, 908 flow. Second operand 9 states and 97 transitions. [2024-02-07 19:20:52,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 83 transitions, 1127 flow [2024-02-07 19:20:52,560 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 19:20:52,561 INFO L231 Difference]: Finished difference. Result has 119 places, 58 transitions, 824 flow [2024-02-07 19:20:52,562 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 19:20:52,562 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 86 predicate places. [2024-02-07 19:20:52,562 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 58 transitions, 824 flow [2024-02-07 19:20:52,562 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 19:20:52,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:52,562 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 19:20:52,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-02-07 19:20:52,563 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 19:20:52,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1323817431, now seen corresponding path program 8 times [2024-02-07 19:20:52,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:52,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638080464] [2024-02-07 19:20:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:52,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:52,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638080464] [2024-02-07 19:20:52,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638080464] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:52,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:52,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:52,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037595541] [2024-02-07 19:20:52,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:52,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:52,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:52,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:52,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:52,687 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 19:20:52,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:52,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:52,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:52,902 INFO L124 PetriNetUnfolderBase]: 159/394 cut-off events. [2024-02-07 19:20:52,903 INFO L125 PetriNetUnfolderBase]: For 1443/1443 co-relation queries the response was YES. [2024-02-07 19:20:52,903 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 19:20:52,905 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 61 selfloop transitions, 29 changer transitions 10/101 dead transitions. [2024-02-07 19:20:52,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 101 transitions, 1155 flow [2024-02-07 19:20:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 19:20:52,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 19:20:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2024-02-07 19:20:52,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29280397022332505 [2024-02-07 19:20:52,906 INFO L175 Difference]: Start difference. First operand has 119 places, 58 transitions, 824 flow. Second operand 13 states and 118 transitions. [2024-02-07 19:20:52,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 101 transitions, 1155 flow [2024-02-07 19:20:52,909 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 19:20:52,910 INFO L231 Difference]: Finished difference. Result has 119 places, 60 transitions, 829 flow [2024-02-07 19:20:52,911 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 19:20:52,911 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 86 predicate places. [2024-02-07 19:20:52,911 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 60 transitions, 829 flow [2024-02-07 19:20:52,911 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 19:20:52,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:52,911 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 19:20:52,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-02-07 19:20:52,912 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 19:20:52,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2100473843, now seen corresponding path program 9 times [2024-02-07 19:20:52,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:52,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606283133] [2024-02-07 19:20:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:52,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:53,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:53,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:53,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606283133] [2024-02-07 19:20:53,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606283133] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:53,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:53,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:53,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028315028] [2024-02-07 19:20:53,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:53,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:53,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:53,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:53,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:53,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:53,043 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 19:20:53,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:53,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:53,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:53,226 INFO L124 PetriNetUnfolderBase]: 155/379 cut-off events. [2024-02-07 19:20:53,226 INFO L125 PetriNetUnfolderBase]: For 1204/1204 co-relation queries the response was YES. [2024-02-07 19:20:53,234 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 19:20:53,237 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 51 selfloop transitions, 27 changer transitions 16/95 dead transitions. [2024-02-07 19:20:53,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 95 transitions, 1100 flow [2024-02-07 19:20:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:20:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:20:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 108 transitions. [2024-02-07 19:20:53,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903225806451613 [2024-02-07 19:20:53,238 INFO L175 Difference]: Start difference. First operand has 119 places, 60 transitions, 829 flow. Second operand 12 states and 108 transitions. [2024-02-07 19:20:53,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 95 transitions, 1100 flow [2024-02-07 19:20:53,241 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 19:20:53,242 INFO L231 Difference]: Finished difference. Result has 124 places, 58 transitions, 806 flow [2024-02-07 19:20:53,242 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 19:20:53,243 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 91 predicate places. [2024-02-07 19:20:53,243 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 58 transitions, 806 flow [2024-02-07 19:20:53,243 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 19:20:53,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:53,243 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 19:20:53,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-02-07 19:20:53,244 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 19:20:53,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2043699337, now seen corresponding path program 10 times [2024-02-07 19:20:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:53,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827939954] [2024-02-07 19:20:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:53,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:53,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:53,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827939954] [2024-02-07 19:20:53,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827939954] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:53,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:53,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:53,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652033742] [2024-02-07 19:20:53,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:53,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:53,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:53,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:53,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:53,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:53,359 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 19:20:53,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:53,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:53,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:53,542 INFO L124 PetriNetUnfolderBase]: 138/339 cut-off events. [2024-02-07 19:20:53,542 INFO L125 PetriNetUnfolderBase]: For 1170/1170 co-relation queries the response was YES. [2024-02-07 19:20:53,543 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 19:20:53,543 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 49 selfloop transitions, 23 changer transitions 15/88 dead transitions. [2024-02-07 19:20:53,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 88 transitions, 1047 flow [2024-02-07 19:20:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:20:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:20:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 103 transitions. [2024-02-07 19:20:53,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2768817204301075 [2024-02-07 19:20:53,544 INFO L175 Difference]: Start difference. First operand has 124 places, 58 transitions, 806 flow. Second operand 12 states and 103 transitions. [2024-02-07 19:20:53,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 88 transitions, 1047 flow [2024-02-07 19:20:53,548 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 19:20:53,549 INFO L231 Difference]: Finished difference. Result has 122 places, 54 transitions, 730 flow [2024-02-07 19:20:53,549 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 19:20:53,549 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2024-02-07 19:20:53,549 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 54 transitions, 730 flow [2024-02-07 19:20:53,549 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 19:20:53,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:53,550 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 19:20:53,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-02-07 19:20:53,550 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 19:20:53,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1182094451, now seen corresponding path program 11 times [2024-02-07 19:20:53,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:53,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145222647] [2024-02-07 19:20:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:53,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:53,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:53,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145222647] [2024-02-07 19:20:53,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145222647] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:53,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:53,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:53,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733806642] [2024-02-07 19:20:53,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:53,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:53,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:53,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:53,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:53,680 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 19:20:53,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:53,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:53,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:53,840 INFO L124 PetriNetUnfolderBase]: 128/321 cut-off events. [2024-02-07 19:20:53,840 INFO L125 PetriNetUnfolderBase]: For 1032/1032 co-relation queries the response was YES. [2024-02-07 19:20:53,841 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 19:20:53,842 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 48 selfloop transitions, 21 changer transitions 12/82 dead transitions. [2024-02-07 19:20:53,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 82 transitions, 961 flow [2024-02-07 19:20:53,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 91 transitions. [2024-02-07 19:20:53,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29354838709677417 [2024-02-07 19:20:53,843 INFO L175 Difference]: Start difference. First operand has 122 places, 54 transitions, 730 flow. Second operand 10 states and 91 transitions. [2024-02-07 19:20:53,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 82 transitions, 961 flow [2024-02-07 19:20:53,845 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 19:20:53,846 INFO L231 Difference]: Finished difference. Result has 115 places, 52 transitions, 692 flow [2024-02-07 19:20:53,846 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 19:20:53,847 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2024-02-07 19:20:53,847 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 52 transitions, 692 flow [2024-02-07 19:20:53,847 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 19:20:53,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:53,847 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 19:20:53,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-02-07 19:20:53,848 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 19:20:53,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash 363655849, now seen corresponding path program 12 times [2024-02-07 19:20:53,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:53,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650123929] [2024-02-07 19:20:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:53,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:53,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650123929] [2024-02-07 19:20:53,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650123929] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:53,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:53,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:53,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492774253] [2024-02-07 19:20:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:53,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:53,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:53,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:53,953 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 19:20:53,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:53,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:53,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:54,119 INFO L124 PetriNetUnfolderBase]: 122/302 cut-off events. [2024-02-07 19:20:54,119 INFO L125 PetriNetUnfolderBase]: For 948/948 co-relation queries the response was YES. [2024-02-07 19:20:54,120 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 19:20:54,120 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 17 changer transitions 22/74 dead transitions. [2024-02-07 19:20:54,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 74 transitions, 885 flow [2024-02-07 19:20:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:54,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-02-07 19:20:54,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2709677419354839 [2024-02-07 19:20:54,121 INFO L175 Difference]: Start difference. First operand has 115 places, 52 transitions, 692 flow. Second operand 10 states and 84 transitions. [2024-02-07 19:20:54,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 74 transitions, 885 flow [2024-02-07 19:20:54,124 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 19:20:54,125 INFO L231 Difference]: Finished difference. Result has 115 places, 46 transitions, 617 flow [2024-02-07 19:20:54,125 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 19:20:54,125 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 82 predicate places. [2024-02-07 19:20:54,125 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 46 transitions, 617 flow [2024-02-07 19:20:54,125 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 19:20:54,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:54,126 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 19:20:54,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-02-07 19:20:54,126 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 19:20:54,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:54,126 INFO L85 PathProgramCache]: Analyzing trace with hash -111690049, now seen corresponding path program 13 times [2024-02-07 19:20:54,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:54,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563368746] [2024-02-07 19:20:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:54,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:54,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:54,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:54,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563368746] [2024-02-07 19:20:54,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563368746] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:54,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:54,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:54,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928684082] [2024-02-07 19:20:54,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:54,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:54,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:54,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:54,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:54,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:54,245 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 19:20:54,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:54,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:54,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:54,416 INFO L124 PetriNetUnfolderBase]: 93/241 cut-off events. [2024-02-07 19:20:54,416 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2024-02-07 19:20:54,417 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 19:20:54,417 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 37 selfloop transitions, 27 changer transitions 9/74 dead transitions. [2024-02-07 19:20:54,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 74 transitions, 839 flow [2024-02-07 19:20:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-02-07 19:20:54,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-02-07 19:20:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2024-02-07 19:20:54,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24317617866004962 [2024-02-07 19:20:54,418 INFO L175 Difference]: Start difference. First operand has 115 places, 46 transitions, 617 flow. Second operand 13 states and 98 transitions. [2024-02-07 19:20:54,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 74 transitions, 839 flow [2024-02-07 19:20:54,420 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 19:20:54,421 INFO L231 Difference]: Finished difference. Result has 103 places, 46 transitions, 576 flow [2024-02-07 19:20:54,421 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 19:20:54,422 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 70 predicate places. [2024-02-07 19:20:54,422 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 46 transitions, 576 flow [2024-02-07 19:20:54,422 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 19:20:54,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:54,422 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 19:20:54,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-02-07 19:20:54,422 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 19:20:54,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:54,423 INFO L85 PathProgramCache]: Analyzing trace with hash 865011094, now seen corresponding path program 8 times [2024-02-07 19:20:54,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:54,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194723660] [2024-02-07 19:20:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:54,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:54,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:54,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194723660] [2024-02-07 19:20:54,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194723660] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:54,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:54,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:54,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443180613] [2024-02-07 19:20:54,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:54,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:54,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:54,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:54,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:54,513 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 19:20:54,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:54,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:54,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:54,665 INFO L124 PetriNetUnfolderBase]: 93/245 cut-off events. [2024-02-07 19:20:54,666 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-02-07 19:20:54,666 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 19:20:54,668 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 49 selfloop transitions, 14 changer transitions 10/74 dead transitions. [2024-02-07 19:20:54,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 74 transitions, 813 flow [2024-02-07 19:20:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:54,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-02-07 19:20:54,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-02-07 19:20:54,670 INFO L175 Difference]: Start difference. First operand has 103 places, 46 transitions, 576 flow. Second operand 10 states and 111 transitions. [2024-02-07 19:20:54,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 74 transitions, 813 flow [2024-02-07 19:20:54,672 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 19:20:54,673 INFO L231 Difference]: Finished difference. Result has 103 places, 45 transitions, 520 flow [2024-02-07 19:20:54,673 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 19:20:54,673 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 70 predicate places. [2024-02-07 19:20:54,673 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 45 transitions, 520 flow [2024-02-07 19:20:54,673 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 19:20:54,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:54,673 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 19:20:54,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-02-07 19:20:54,673 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 19:20:54,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:54,674 INFO L85 PathProgramCache]: Analyzing trace with hash 766839186, now seen corresponding path program 9 times [2024-02-07 19:20:54,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:54,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522444438] [2024-02-07 19:20:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:54,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:54,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522444438] [2024-02-07 19:20:54,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522444438] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:54,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:54,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221115267] [2024-02-07 19:20:54,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:54,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:54,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:54,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:54,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:54,767 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 19:20:54,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:54,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:54,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:54,882 INFO L124 PetriNetUnfolderBase]: 87/226 cut-off events. [2024-02-07 19:20:54,882 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2024-02-07 19:20:54,883 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 19:20:54,883 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 43 selfloop transitions, 11 changer transitions 12/67 dead transitions. [2024-02-07 19:20:54,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 67 transitions, 709 flow [2024-02-07 19:20:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:20:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:20:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-02-07 19:20:54,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-02-07 19:20:54,884 INFO L175 Difference]: Start difference. First operand has 103 places, 45 transitions, 520 flow. Second operand 9 states and 99 transitions. [2024-02-07 19:20:54,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 67 transitions, 709 flow [2024-02-07 19:20:54,885 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 19:20:54,886 INFO L231 Difference]: Finished difference. Result has 102 places, 42 transitions, 465 flow [2024-02-07 19:20:54,886 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 19:20:54,887 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 69 predicate places. [2024-02-07 19:20:54,887 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 42 transitions, 465 flow [2024-02-07 19:20:54,887 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 19:20:54,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:54,887 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 19:20:54,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-02-07 19:20:54,887 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 19:20:54,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:54,887 INFO L85 PathProgramCache]: Analyzing trace with hash -638655934, now seen corresponding path program 10 times [2024-02-07 19:20:54,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:54,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559047747] [2024-02-07 19:20:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:54,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:54,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:54,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559047747] [2024-02-07 19:20:54,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559047747] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:54,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-02-07 19:20:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835638957] [2024-02-07 19:20:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-07 19:20:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-07 19:20:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-02-07 19:20:54,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 31 [2024-02-07 19:20:54,974 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 19:20:54,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:54,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 31 [2024-02-07 19:20:54,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:55,116 INFO L124 PetriNetUnfolderBase]: 82/206 cut-off events. [2024-02-07 19:20:55,116 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-02-07 19:20:55,117 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 19:20:55,117 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 8 changer transitions 18/57 dead transitions. [2024-02-07 19:20:55,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 57 transitions, 610 flow [2024-02-07 19:20:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-02-07 19:20:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-02-07 19:20:55,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 84 transitions. [2024-02-07 19:20:55,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-02-07 19:20:55,118 INFO L175 Difference]: Start difference. First operand has 102 places, 42 transitions, 465 flow. Second operand 8 states and 84 transitions. [2024-02-07 19:20:55,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 57 transitions, 610 flow [2024-02-07 19:20:55,119 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 19:20:55,120 INFO L231 Difference]: Finished difference. Result has 97 places, 36 transitions, 371 flow [2024-02-07 19:20:55,120 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 19:20:55,121 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2024-02-07 19:20:55,121 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 36 transitions, 371 flow [2024-02-07 19:20:55,121 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 19:20:55,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:55,121 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 19:20:55,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-02-07 19:20:55,121 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 19:20:55,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1180863557, now seen corresponding path program 14 times [2024-02-07 19:20:55,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:55,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063154106] [2024-02-07 19:20:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:55,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:55,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:55,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063154106] [2024-02-07 19:20:55,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063154106] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:55,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:55,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:55,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479477225] [2024-02-07 19:20:55,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:55,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:55,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:55,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:55,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:55,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:55,237 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 19:20:55,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:55,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:55,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:55,406 INFO L124 PetriNetUnfolderBase]: 59/161 cut-off events. [2024-02-07 19:20:55,406 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2024-02-07 19:20:55,407 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 19:20:55,407 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 35 selfloop transitions, 15 changer transitions 9/60 dead transitions. [2024-02-07 19:20:55,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 60 transitions, 549 flow [2024-02-07 19:20:55,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:20:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:20:55,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 91 transitions. [2024-02-07 19:20:55,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2446236559139785 [2024-02-07 19:20:55,408 INFO L175 Difference]: Start difference. First operand has 97 places, 36 transitions, 371 flow. Second operand 12 states and 91 transitions. [2024-02-07 19:20:55,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 60 transitions, 549 flow [2024-02-07 19:20:55,409 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 19:20:55,410 INFO L231 Difference]: Finished difference. Result has 85 places, 34 transitions, 332 flow [2024-02-07 19:20:55,410 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 19:20:55,411 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2024-02-07 19:20:55,411 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 34 transitions, 332 flow [2024-02-07 19:20:55,411 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 19:20:55,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:55,411 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 19:20:55,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-02-07 19:20:55,412 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 19:20:55,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:55,412 INFO L85 PathProgramCache]: Analyzing trace with hash -353912151, now seen corresponding path program 15 times [2024-02-07 19:20:55,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:55,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540243747] [2024-02-07 19:20:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:55,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:55,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:55,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540243747] [2024-02-07 19:20:55,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540243747] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:55,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:55,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:55,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419290102] [2024-02-07 19:20:55,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:55,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:55,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:55,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:55,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:55,539 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 19:20:55,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:55,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:55,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:55,719 INFO L124 PetriNetUnfolderBase]: 53/142 cut-off events. [2024-02-07 19:20:55,719 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-02-07 19:20:55,719 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 19:20:55,720 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 30 selfloop transitions, 12 changer transitions 11/54 dead transitions. [2024-02-07 19:20:55,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 54 transitions, 484 flow [2024-02-07 19:20:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:20:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:20:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 86 transitions. [2024-02-07 19:20:55,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23118279569892472 [2024-02-07 19:20:55,721 INFO L175 Difference]: Start difference. First operand has 85 places, 34 transitions, 332 flow. Second operand 12 states and 86 transitions. [2024-02-07 19:20:55,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 54 transitions, 484 flow [2024-02-07 19:20:55,721 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 19:20:55,722 INFO L231 Difference]: Finished difference. Result has 84 places, 30 transitions, 269 flow [2024-02-07 19:20:55,722 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 19:20:55,722 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 51 predicate places. [2024-02-07 19:20:55,722 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 30 transitions, 269 flow [2024-02-07 19:20:55,722 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 19:20:55,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:55,723 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 19:20:55,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-02-07 19:20:55,723 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 19:20:55,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1382905843, now seen corresponding path program 16 times [2024-02-07 19:20:55,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:55,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835873237] [2024-02-07 19:20:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:55,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:55,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:55,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835873237] [2024-02-07 19:20:55,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835873237] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:55,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:55,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:55,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829573823] [2024-02-07 19:20:55,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:55,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:55,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:55,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:55,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:55,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:55,823 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 19:20:55,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:55,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:55,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:55,975 INFO L124 PetriNetUnfolderBase]: 48/133 cut-off events. [2024-02-07 19:20:55,975 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-02-07 19:20:55,976 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 19:20:55,976 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 24 selfloop transitions, 13 changer transitions 11/49 dead transitions. [2024-02-07 19:20:55,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 49 transitions, 410 flow [2024-02-07 19:20:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:20:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:20:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 80 transitions. [2024-02-07 19:20:55,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21505376344086022 [2024-02-07 19:20:55,977 INFO L175 Difference]: Start difference. First operand has 84 places, 30 transitions, 269 flow. Second operand 12 states and 80 transitions. [2024-02-07 19:20:55,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 49 transitions, 410 flow [2024-02-07 19:20:55,978 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 19:20:55,978 INFO L231 Difference]: Finished difference. Result has 78 places, 28 transitions, 225 flow [2024-02-07 19:20:55,978 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 19:20:55,978 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 45 predicate places. [2024-02-07 19:20:55,979 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 28 transitions, 225 flow [2024-02-07 19:20:55,979 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 19:20:55,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:55,979 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 19:20:55,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-02-07 19:20:55,979 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 19:20:55,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:55,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1801105755, now seen corresponding path program 17 times [2024-02-07 19:20:55,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:55,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529934925] [2024-02-07 19:20:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:55,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:56,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:56,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529934925] [2024-02-07 19:20:56,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529934925] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:56,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:56,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:56,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474443688] [2024-02-07 19:20:56,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:56,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:56,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:56,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:56,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:56,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:56,081 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 19:20:56,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:56,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:56,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:56,236 INFO L124 PetriNetUnfolderBase]: 36/102 cut-off events. [2024-02-07 19:20:56,236 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2024-02-07 19:20:56,236 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 19:20:56,237 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 20 selfloop transitions, 9 changer transitions 15/45 dead transitions. [2024-02-07 19:20:56,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 45 transitions, 350 flow [2024-02-07 19:20:56,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-07 19:20:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-07 19:20:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 79 transitions. [2024-02-07 19:20:56,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21236559139784947 [2024-02-07 19:20:56,238 INFO L175 Difference]: Start difference. First operand has 78 places, 28 transitions, 225 flow. Second operand 12 states and 79 transitions. [2024-02-07 19:20:56,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 45 transitions, 350 flow [2024-02-07 19:20:56,238 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 19:20:56,239 INFO L231 Difference]: Finished difference. Result has 76 places, 23 transitions, 161 flow [2024-02-07 19:20:56,239 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 19:20:56,239 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 43 predicate places. [2024-02-07 19:20:56,239 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 23 transitions, 161 flow [2024-02-07 19:20:56,239 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 19:20:56,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:56,240 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 19:20:56,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-02-07 19:20:56,240 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 19:20:56,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:56,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1695158391, now seen corresponding path program 18 times [2024-02-07 19:20:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:56,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898132747] [2024-02-07 19:20:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:56,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:56,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:56,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898132747] [2024-02-07 19:20:56,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898132747] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:56,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:56,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:56,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807796677] [2024-02-07 19:20:56,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:56,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:56,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:56,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:56,342 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 19:20:56,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:56,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:56,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:56,468 INFO L124 PetriNetUnfolderBase]: 21/75 cut-off events. [2024-02-07 19:20:56,468 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-02-07 19:20:56,468 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 19:20:56,468 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 24 selfloop transitions, 8 changer transitions 9/42 dead transitions. [2024-02-07 19:20:56,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 42 transitions, 299 flow [2024-02-07 19:20:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-02-07 19:20:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-02-07 19:20:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 75 transitions. [2024-02-07 19:20:56,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.21994134897360704 [2024-02-07 19:20:56,469 INFO L175 Difference]: Start difference. First operand has 76 places, 23 transitions, 161 flow. Second operand 11 states and 75 transitions. [2024-02-07 19:20:56,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 42 transitions, 299 flow [2024-02-07 19:20:56,470 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 19:20:56,470 INFO L231 Difference]: Finished difference. Result has 65 places, 22 transitions, 127 flow [2024-02-07 19:20:56,470 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 19:20:56,470 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 32 predicate places. [2024-02-07 19:20:56,470 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 22 transitions, 127 flow [2024-02-07 19:20:56,471 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 19:20:56,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:56,471 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 19:20:56,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-02-07 19:20:56,471 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 19:20:56,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:56,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1596986483, now seen corresponding path program 19 times [2024-02-07 19:20:56,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:56,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028422629] [2024-02-07 19:20:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:56,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:56,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:56,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028422629] [2024-02-07 19:20:56,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028422629] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:56,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:56,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:56,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851902192] [2024-02-07 19:20:56,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:56,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:56,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:56,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:56,573 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 19:20:56,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:56,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:56,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:56,681 INFO L124 PetriNetUnfolderBase]: 15/56 cut-off events. [2024-02-07 19:20:56,681 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-02-07 19:20:56,682 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 19:20:56,682 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 18 selfloop transitions, 5 changer transitions 11/35 dead transitions. [2024-02-07 19:20:56,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 35 transitions, 224 flow [2024-02-07 19:20:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-02-07 19:20:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-02-07 19:20:56,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 65 transitions. [2024-02-07 19:20:56,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20967741935483872 [2024-02-07 19:20:56,683 INFO L175 Difference]: Start difference. First operand has 65 places, 22 transitions, 127 flow. Second operand 10 states and 65 transitions. [2024-02-07 19:20:56,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 35 transitions, 224 flow [2024-02-07 19:20:56,683 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 19:20:56,684 INFO L231 Difference]: Finished difference. Result has 63 places, 18 transitions, 82 flow [2024-02-07 19:20:56,684 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 19:20:56,684 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 30 predicate places. [2024-02-07 19:20:56,684 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 18 transitions, 82 flow [2024-02-07 19:20:56,684 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 19:20:56,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-02-07 19:20:56,684 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 19:20:56,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-02-07 19:20:56,685 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 19:20:56,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-07 19:20:56,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1836881371, now seen corresponding path program 20 times [2024-02-07 19:20:56,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-07 19:20:56,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440975313] [2024-02-07 19:20:56,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-07 19:20:56,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-07 19:20:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-07 19:20:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-07 19:20:56,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-07 19:20:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440975313] [2024-02-07 19:20:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440975313] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-07 19:20:56,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-07 19:20:56,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-02-07 19:20:56,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404379367] [2024-02-07 19:20:56,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-07 19:20:56,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-02-07 19:20:56,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-07 19:20:56,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-02-07 19:20:56,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-02-07 19:20:56,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 31 [2024-02-07 19:20:56,791 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 19:20:56,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-07 19:20:56,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 31 [2024-02-07 19:20:56,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-07 19:20:56,886 INFO L124 PetriNetUnfolderBase]: 10/36 cut-off events. [2024-02-07 19:20:56,887 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-07 19:20:56,887 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 19:20:56,887 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 0 selfloop transitions, 0 changer transitions 24/24 dead transitions. [2024-02-07 19:20:56,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 24 transitions, 141 flow [2024-02-07 19:20:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-02-07 19:20:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-02-07 19:20:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 52 transitions. [2024-02-07 19:20:56,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.1863799283154122 [2024-02-07 19:20:56,888 INFO L175 Difference]: Start difference. First operand has 63 places, 18 transitions, 82 flow. Second operand 9 states and 52 transitions. [2024-02-07 19:20:56,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 24 transitions, 141 flow [2024-02-07 19:20:56,888 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 19:20:56,889 INFO L231 Difference]: Finished difference. Result has 57 places, 0 transitions, 0 flow [2024-02-07 19:20:56,889 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 19:20:56,889 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 24 predicate places. [2024-02-07 19:20:56,889 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 0 transitions, 0 flow [2024-02-07 19:20:56,889 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 19:20:56,891 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (14 of 15 remaining) [2024-02-07 19:20:56,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (13 of 15 remaining) [2024-02-07 19:20:56,894 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (12 of 15 remaining) [2024-02-07 19:20:56,894 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (11 of 15 remaining) [2024-02-07 19:20:56,894 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 15 remaining) [2024-02-07 19:20:56,894 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 15 remaining) [2024-02-07 19:20:56,894 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (8 of 15 remaining) [2024-02-07 19:20:56,895 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 15 remaining) [2024-02-07 19:20:56,895 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 15 remaining) [2024-02-07 19:20:56,895 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 15 remaining) [2024-02-07 19:20:56,895 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 15 remaining) [2024-02-07 19:20:56,895 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 15 remaining) [2024-02-07 19:20:56,895 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 15 remaining) [2024-02-07 19:20:56,895 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONWITNESS_INVARIANT (1 of 15 remaining) [2024-02-07 19:20:56,895 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err2ASSERT_VIOLATIONWITNESS_INVARIANT (0 of 15 remaining) [2024-02-07 19:20:56,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-02-07 19:20:56,896 INFO L445 BasicCegarLoop]: Path program histogram: [20, 10, 10, 5, 1, 1, 1, 1, 1, 1] [2024-02-07 19:20:56,900 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-02-07 19:20:56,900 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-02-07 19:20:56,903 INFO L503 ceAbstractionStarter]: Automizer considered 6 witness invariants [2024-02-07 19:20:56,903 INFO L504 ceAbstractionStarter]: WitnessConsidered=6 [2024-02-07 19:20:56,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.02 07:20:56 BasicIcfg [2024-02-07 19:20:56,905 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-02-07 19:20:56,905 INFO L158 Benchmark]: Toolchain (without parser) took 16019.61ms. Allocated memory was 121.6MB in the beginning and 423.6MB in the end (delta: 302.0MB). Free memory was 65.5MB in the beginning and 229.5MB in the end (delta: -163.9MB). Peak memory consumption was 138.4MB. Max. memory is 16.1GB. [2024-02-07 19:20:56,905 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 121.6MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:20:56,906 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory is still 89.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-02-07 19:20:56,906 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.22ms. Allocated memory is still 121.6MB. Free memory was 65.5MB in the beginning and 51.6MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-02-07 19:20:56,909 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.84ms. Allocated memory is still 121.6MB. Free memory was 51.6MB in the beginning and 49.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 19:20:56,910 INFO L158 Benchmark]: Boogie Preprocessor took 48.95ms. Allocated memory is still 121.6MB. Free memory was 49.9MB in the beginning and 48.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-02-07 19:20:56,910 INFO L158 Benchmark]: RCFGBuilder took 589.16ms. Allocated memory was 121.6MB in the beginning and 163.6MB in the end (delta: 41.9MB). Free memory was 48.1MB in the beginning and 121.7MB in the end (delta: -73.6MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. [2024-02-07 19:20:56,910 INFO L158 Benchmark]: TraceAbstraction took 15080.10ms. Allocated memory was 163.6MB in the beginning and 423.6MB in the end (delta: 260.0MB). Free memory was 120.9MB in the beginning and 229.5MB in the end (delta: -108.6MB). Peak memory consumption was 151.1MB. Max. memory is 16.1GB. [2024-02-07 19:20:56,911 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 0.17ms. Allocated memory is still 121.6MB. Free memory is still 91.8MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.18ms. Allocated memory is still 121.6MB. Free memory is still 89.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.22ms. Allocated memory is still 121.6MB. Free memory was 65.5MB in the beginning and 51.6MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.84ms. Allocated memory is still 121.6MB. Free memory was 51.6MB in the beginning and 49.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.95ms. Allocated memory is still 121.6MB. Free memory was 49.9MB in the beginning and 48.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 589.16ms. Allocated memory was 121.6MB in the beginning and 163.6MB in the end (delta: 41.9MB). Free memory was 48.1MB in the beginning and 121.7MB in the end (delta: -73.6MB). Peak memory consumption was 23.0MB. Max. memory is 16.1GB. * TraceAbstraction took 15080.10ms. Allocated memory was 163.6MB in the beginning and 423.6MB in the end (delta: 260.0MB). Free memory was 120.9MB in the beginning and 229.5MB in the end (delta: -108.6MB). Peak memory consumption was 151.1MB. 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: 14.9s, OverallIterations: 51, TraceHistogramMax: 1, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 9.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3929 SdHoareTripleChecker+Valid, 4.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3739 mSDsluCounter, 1120 SdHoareTripleChecker+Invalid, 3.9s 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, 3.3s 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, 0.3s SatisfiabilityAnalysisTime, 4.7s 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 19:20:56,951 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