./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/protection/array-eq-trans.wvr.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/array-eq-trans.wvr.c ./goblint.2024-05-07_14-17-48.files/protection/array-eq-trans.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.witness-ghost-b44c828-m [2024-05-12 12:52:55,060 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 12:52:55,097 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 12:52:55,100 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 12:52:55,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 12:52:55,116 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 12:52:55,120 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 12:52:55,120 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 12:52:55,121 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 12:52:55,124 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 12:52:55,124 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 12:52:55,124 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 12:52:55,125 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 12:52:55,125 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 12:52:55,126 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 12:52:55,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 12:52:55,126 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 12:52:55,126 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 12:52:55,127 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 12:52:55,127 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 12:52:55,127 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 12:52:55,129 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 12:52:55,129 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 12:52:55,129 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 12:52:55,129 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 12:52:55,129 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 12:52:55,130 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 12:52:55,130 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 12:52:55,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 12:52:55,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 12:52:55,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 12:52:55,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 12:52:55,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:52:55,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 12:52:55,132 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 12:52:55,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 12:52:55,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 12:52:55,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 12:52:55,134 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 12:52:55,134 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 12:52:55,134 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 12:52:55,134 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 12:52:55,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 12:52:55,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 12:52:55,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 12:52:55,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 12:52:55,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 12:52:55,341 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 12:52:55,341 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 12:52:55,342 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-05-12 12:52:56,516 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 12:52:56,636 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 12:52:56,636 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-05-12 12:52:56,642 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02995f276/a7ce87f14cc64aeab9cc265e77b0c770/FLAGea0485e67 [2024-05-12 12:52:56,757 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02995f276/a7ce87f14cc64aeab9cc265e77b0c770 [2024-05-12 12:52:56,759 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 12:52:56,760 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 12:52:56,762 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/protection/array-eq-trans.wvr.yml/witness.yml [2024-05-12 12:52:56,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 12:52:56,820 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 12:52:56,821 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 12:52:56,821 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 12:52:56,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 12:52:56,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:52:56" (1/2) ... [2024-05-12 12:52:56,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13dbcb5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:52:56, skipping insertion in model container [2024-05-12 12:52:56,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 12:52:56" (1/2) ... [2024-05-12 12:52:56,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@789b7e55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 12:52:56, skipping insertion in model container [2024-05-12 12:52:56,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:52:56" (2/2) ... [2024-05-12 12:52:56,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13dbcb5b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:56, skipping insertion in model container [2024-05-12 12:52:56,832 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:52:56" (2/2) ... [2024-05-12 12:52:56,832 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 12:52:56,853 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 12:52:56,854 INFO L97 edCorrectnessWitness]: Location invariant before [L93-L93] ((! multithreaded || 0 <= i_AC) && (! multithreaded || 0 <= i_BC)) && (! multithreaded || 0 <= i_AB) [2024-05-12 12:52:56,854 INFO L97 edCorrectnessWitness]: Location invariant before [L94-L94] ((! multithreaded || 0 <= i_AC) && (! multithreaded || 0 <= i_BC)) && (! multithreaded || 0 <= i_AB) [2024-05-12 12:52:56,855 INFO L97 edCorrectnessWitness]: Location invariant before [L95-L95] ((! multithreaded || 0 <= i_AC) && (! multithreaded || 0 <= i_BC)) && (! multithreaded || 0 <= i_AB) [2024-05-12 12:52:56,855 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 12:52:56,855 INFO L106 edCorrectnessWitness]: ghost_update [L92-L92] multithreaded = 1; [2024-05-12 12:52:56,872 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 12:52:57,007 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c[2737,2750] [2024-05-12 12:52:57,016 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:52:57,022 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 12:52:57,062 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c[2737,2750] [2024-05-12 12:52:57,065 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 12:52:57,077 INFO L206 MainTranslator]: Completed translation [2024-05-12 12:52:57,077 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57 WrapperNode [2024-05-12 12:52:57,077 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 12:52:57,078 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 12:52:57,078 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 12:52:57,079 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 12:52:57,083 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,106 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 218 [2024-05-12 12:52:57,107 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 12:52:57,107 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 12:52:57,108 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 12:52:57,108 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 12:52:57,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,118 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,139 INFO L175 MemorySlicer]: Split 23 memory accesses to 5 slices as follows [2, 2, 2, 2, 15]. 65 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 1, 3]. [2024-05-12 12:52:57,145 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,145 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,156 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,165 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,174 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 12:52:57,177 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 12:52:57,177 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 12:52:57,177 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 12:52:57,178 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (1/1) ... [2024-05-12 12:52:57,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 12:52:57,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:52:57,237 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) [2024-05-12 12:52:57,256 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 [2024-05-12 12:52:57,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 12:52:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-05-12 12:52:57,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-05-12 12:52:57,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-05-12 12:52:57,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-05-12 12:52:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-05-12 12:52:57,270 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-05-12 12:52:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 12:52:57,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 12:52:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 12:52:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 12:52:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 12:52:57,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 12:52:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 12:52:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 12:52:57,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 12:52:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 12:52:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 12:52:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-05-12 12:52:57,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 12:52:57,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 12:52:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-05-12 12:52:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-05-12 12:52:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-05-12 12:52:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-05-12 12:52:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-05-12 12:52:57,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 12:52:57,276 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 12:52:57,392 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 12:52:57,394 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 12:52:57,761 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 12:52:57,761 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 12:52:58,031 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 12:52:58,032 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-05-12 12:52:58,032 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:52:58 BoogieIcfgContainer [2024-05-12 12:52:58,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 12:52:58,035 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 12:52:58,035 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 12:52:58,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 12:52:58,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 12:52:56" (1/4) ... [2024-05-12 12:52:58,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737b73ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 12:52:58, skipping insertion in model container [2024-05-12 12:52:58,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 12:52:56" (2/4) ... [2024-05-12 12:52:58,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737b73ae and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:52:58, skipping insertion in model container [2024-05-12 12:52:58,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 12:52:57" (3/4) ... [2024-05-12 12:52:58,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@737b73ae and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 12:52:58, skipping insertion in model container [2024-05-12 12:52:58,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 12:52:58" (4/4) ... [2024-05-12 12:52:58,042 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-05-12 12:52:58,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 12:52:58,056 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 12:52:58,056 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 12:52:58,109 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-05-12 12:52:58,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 48 places, 47 transitions, 115 flow [2024-05-12 12:52:58,177 INFO L124 PetriNetUnfolderBase]: 9/44 cut-off events. [2024-05-12 12:52:58,177 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-05-12 12:52:58,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 44 events. 9/44 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-05-12 12:52:58,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 48 places, 47 transitions, 115 flow [2024-05-12 12:52:58,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 43 transitions, 104 flow [2024-05-12 12:52:58,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 12:52:58,205 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;@34f81ac8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 12:52:58,206 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 12:52:58,216 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 12:52:58,217 INFO L124 PetriNetUnfolderBase]: 5/16 cut-off events. [2024-05-12 12:52:58,217 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 12:52:58,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:58,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:58,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:58,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1274176558, now seen corresponding path program 1 times [2024-05-12 12:52:58,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:58,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873054462] [2024-05-12 12:52:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:58,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:58,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:58,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873054462] [2024-05-12 12:52:58,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873054462] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:58,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:58,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 12:52:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642506312] [2024-05-12 12:52:58,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:58,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 12:52:58,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:58,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 12:52:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 12:52:58,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:52:58,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:58,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:58,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:52:58,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:59,036 INFO L124 PetriNetUnfolderBase]: 2051/2729 cut-off events. [2024-05-12 12:52:59,036 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-05-12 12:52:59,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5586 conditions, 2729 events. 2051/2729 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 9659 event pairs, 567 based on Foata normal form. 1/1773 useless extension candidates. Maximal degree in co-relation 4990. Up to 1734 conditions per place. [2024-05-12 12:52:59,054 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 65 selfloop transitions, 4 changer transitions 1/71 dead transitions. [2024-05-12 12:52:59,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 315 flow [2024-05-12 12:52:59,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 12:52:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 12:52:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-05-12 12:52:59,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6099290780141844 [2024-05-12 12:52:59,066 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 104 flow. Second operand 3 states and 86 transitions. [2024-05-12 12:52:59,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 315 flow [2024-05-12 12:52:59,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 71 transitions, 293 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 12:52:59,078 INFO L231 Difference]: Finished difference. Result has 41 places, 46 transitions, 124 flow [2024-05-12 12:52:59,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=41, PETRI_TRANSITIONS=46} [2024-05-12 12:52:59,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2024-05-12 12:52:59,083 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 46 transitions, 124 flow [2024-05-12 12:52:59,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:59,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:59,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:59,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 12:52:59,084 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:59,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:59,085 INFO L85 PathProgramCache]: Analyzing trace with hash 418203650, now seen corresponding path program 1 times [2024-05-12 12:52:59,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:59,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244560600] [2024-05-12 12:52:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:59,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:59,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:59,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244560600] [2024-05-12 12:52:59,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244560600] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:59,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:59,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:52:59,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752263645] [2024-05-12 12:52:59,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:59,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:52:59,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:59,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:52:59,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:52:59,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:52:59,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 46 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:59,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:59,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:52:59,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:52:59,572 INFO L124 PetriNetUnfolderBase]: 2912/3869 cut-off events. [2024-05-12 12:52:59,573 INFO L125 PetriNetUnfolderBase]: For 496/496 co-relation queries the response was YES. [2024-05-12 12:52:59,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8689 conditions, 3869 events. 2912/3869 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14830 event pairs, 564 based on Foata normal form. 84/3330 useless extension candidates. Maximal degree in co-relation 2009. Up to 1761 conditions per place. [2024-05-12 12:52:59,587 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 88 selfloop transitions, 6 changer transitions 1/96 dead transitions. [2024-05-12 12:52:59,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 96 transitions, 429 flow [2024-05-12 12:52:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:52:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:52:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-05-12 12:52:59,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6063829787234043 [2024-05-12 12:52:59,590 INFO L175 Difference]: Start difference. First operand has 41 places, 46 transitions, 124 flow. Second operand 4 states and 114 transitions. [2024-05-12 12:52:59,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 96 transitions, 429 flow [2024-05-12 12:52:59,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 96 transitions, 425 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 12:52:59,605 INFO L231 Difference]: Finished difference. Result has 43 places, 47 transitions, 147 flow [2024-05-12 12:52:59,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=47} [2024-05-12 12:52:59,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2024-05-12 12:52:59,606 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 47 transitions, 147 flow [2024-05-12 12:52:59,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:52:59,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:52:59,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:52:59,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 12:52:59,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:52:59,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:52:59,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2084454254, now seen corresponding path program 1 times [2024-05-12 12:52:59,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:52:59,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797498802] [2024-05-12 12:52:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:52:59,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:52:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:52:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:52:59,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:52:59,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797498802] [2024-05-12 12:52:59,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797498802] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:52:59,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:52:59,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:52:59,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490237555] [2024-05-12 12:52:59,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:52:59,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:52:59,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:52:59,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:52:59,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:52:59,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:52:59,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 47 transitions, 147 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) [2024-05-12 12:52:59,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:52:59,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:52:59,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:00,164 INFO L124 PetriNetUnfolderBase]: 3778/5018 cut-off events. [2024-05-12 12:53:00,164 INFO L125 PetriNetUnfolderBase]: For 1956/1956 co-relation queries the response was YES. [2024-05-12 12:53:00,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11811 conditions, 5018 events. 3778/5018 cut-off events. For 1956/1956 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20155 event pairs, 612 based on Foata normal form. 80/4289 useless extension candidates. Maximal degree in co-relation 6421. Up to 2923 conditions per place. [2024-05-12 12:53:00,183 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 90 selfloop transitions, 6 changer transitions 1/98 dead transitions. [2024-05-12 12:53:00,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 98 transitions, 464 flow [2024-05-12 12:53:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:53:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:53:00,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-05-12 12:53:00,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601063829787234 [2024-05-12 12:53:00,188 INFO L175 Difference]: Start difference. First operand has 43 places, 47 transitions, 147 flow. Second operand 4 states and 113 transitions. [2024-05-12 12:53:00,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 98 transitions, 464 flow [2024-05-12 12:53:00,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 98 transitions, 455 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:53:00,193 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 171 flow [2024-05-12 12:53:00,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2024-05-12 12:53:00,195 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-05-12 12:53:00,195 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 171 flow [2024-05-12 12:53:00,195 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) [2024-05-12 12:53:00,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:00,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:00,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 12:53:00,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:00,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:00,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1729070270, now seen corresponding path program 1 times [2024-05-12 12:53:00,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:00,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982278677] [2024-05-12 12:53:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:00,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:00,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:00,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982278677] [2024-05-12 12:53:00,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982278677] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:00,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:00,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:00,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746124325] [2024-05-12 12:53:00,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:00,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:53:00,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:53:00,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:53:00,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2024-05-12 12:53:00,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 49 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:00,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:00,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2024-05-12 12:53:00,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:00,701 INFO L124 PetriNetUnfolderBase]: 5423/7357 cut-off events. [2024-05-12 12:53:00,701 INFO L125 PetriNetUnfolderBase]: For 4223/4311 co-relation queries the response was YES. [2024-05-12 12:53:00,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17750 conditions, 7357 events. 5423/7357 cut-off events. For 4223/4311 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31613 event pairs, 3434 based on Foata normal form. 0/6241 useless extension candidates. Maximal degree in co-relation 11011. Up to 4907 conditions per place. [2024-05-12 12:53:00,733 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 80 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2024-05-12 12:53:00,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 87 transitions, 449 flow [2024-05-12 12:53:00,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:00,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-05-12 12:53:00,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46808510638297873 [2024-05-12 12:53:00,735 INFO L175 Difference]: Start difference. First operand has 45 places, 49 transitions, 171 flow. Second operand 5 states and 110 transitions. [2024-05-12 12:53:00,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 87 transitions, 449 flow [2024-05-12 12:53:00,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 87 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:53:00,741 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 190 flow [2024-05-12 12:53:00,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2024-05-12 12:53:00,741 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-05-12 12:53:00,742 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 190 flow [2024-05-12 12:53:00,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:00,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:00,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:00,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 12:53:00,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:00,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1530238070, now seen corresponding path program 1 times [2024-05-12 12:53:00,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:00,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112666678] [2024-05-12 12:53:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:00,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:00,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112666678] [2024-05-12 12:53:00,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112666678] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:00,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:00,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:00,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206587686] [2024-05-12 12:53:00,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:00,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:00,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:00,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:00,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2024-05-12 12:53:00,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:00,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:00,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2024-05-12 12:53:00,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:01,713 INFO L124 PetriNetUnfolderBase]: 9788/13409 cut-off events. [2024-05-12 12:53:01,714 INFO L125 PetriNetUnfolderBase]: For 6512/6708 co-relation queries the response was YES. [2024-05-12 12:53:01,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32053 conditions, 13409 events. 9788/13409 cut-off events. For 6512/6708 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 65005 event pairs, 5408 based on Foata normal form. 183/11981 useless extension candidates. Maximal degree in co-relation 20742. Up to 5743 conditions per place. [2024-05-12 12:53:01,757 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 107 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2024-05-12 12:53:01,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 121 transitions, 629 flow [2024-05-12 12:53:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:53:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:53:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-05-12 12:53:01,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-05-12 12:53:01,759 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 190 flow. Second operand 6 states and 146 transitions. [2024-05-12 12:53:01,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 121 transitions, 629 flow [2024-05-12 12:53:01,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 121 transitions, 625 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:01,769 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 262 flow [2024-05-12 12:53:01,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-05-12 12:53:01,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-05-12 12:53:01,770 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 262 flow [2024-05-12 12:53:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:01,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:01,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:01,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 12:53:01,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:01,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:01,771 INFO L85 PathProgramCache]: Analyzing trace with hash 666893230, now seen corresponding path program 1 times [2024-05-12 12:53:01,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:01,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304502860] [2024-05-12 12:53:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:01,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 12:53:01,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:01,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304502860] [2024-05-12 12:53:01,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304502860] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:01,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:01,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 12:53:01,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849701834] [2024-05-12 12:53:01,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:01,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:53:01,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:53:01,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:53:01,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:01,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:01,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:01,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:01,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:02,904 INFO L124 PetriNetUnfolderBase]: 12383/16800 cut-off events. [2024-05-12 12:53:02,904 INFO L125 PetriNetUnfolderBase]: For 10070/10070 co-relation queries the response was YES. [2024-05-12 12:53:02,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41337 conditions, 16800 events. 12383/16800 cut-off events. For 10070/10070 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 84174 event pairs, 2872 based on Foata normal form. 208/15000 useless extension candidates. Maximal degree in co-relation 26439. Up to 10661 conditions per place. [2024-05-12 12:53:02,965 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 98 selfloop transitions, 6 changer transitions 1/106 dead transitions. [2024-05-12 12:53:02,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 106 transitions, 603 flow [2024-05-12 12:53:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 12:53:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 12:53:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-05-12 12:53:02,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797872340425532 [2024-05-12 12:53:02,967 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 262 flow. Second operand 4 states and 109 transitions. [2024-05-12 12:53:02,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 106 transitions, 603 flow [2024-05-12 12:53:02,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 106 transitions, 594 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:02,976 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 289 flow [2024-05-12 12:53:02,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=289, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-05-12 12:53:02,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 17 predicate places. [2024-05-12 12:53:02,977 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 289 flow [2024-05-12 12:53:02,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:02,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:02,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:02,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 12:53:02,978 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:02,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:02,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1359499919, now seen corresponding path program 1 times [2024-05-12 12:53:02,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:02,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454117229] [2024-05-12 12:53:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:02,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:53:03,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:03,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454117229] [2024-05-12 12:53:03,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454117229] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:03,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:03,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:03,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20661205] [2024-05-12 12:53:03,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:03,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:03,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:03,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:03,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:03,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2024-05-12 12:53:03,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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) [2024-05-12 12:53:03,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:03,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2024-05-12 12:53:03,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:04,929 INFO L124 PetriNetUnfolderBase]: 16998/23546 cut-off events. [2024-05-12 12:53:04,930 INFO L125 PetriNetUnfolderBase]: For 17908/18232 co-relation queries the response was YES. [2024-05-12 12:53:04,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59072 conditions, 23546 events. 16998/23546 cut-off events. For 17908/18232 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 128039 event pairs, 8087 based on Foata normal form. 0/21004 useless extension candidates. Maximal degree in co-relation 39672. Up to 9117 conditions per place. [2024-05-12 12:53:05,033 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 106 selfloop transitions, 13 changer transitions 0/122 dead transitions. [2024-05-12 12:53:05,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 122 transitions, 741 flow [2024-05-12 12:53:05,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-05-12 12:53:05,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617021276595745 [2024-05-12 12:53:05,035 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 289 flow. Second operand 5 states and 132 transitions. [2024-05-12 12:53:05,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 122 transitions, 741 flow [2024-05-12 12:53:05,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 122 transitions, 728 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:53:05,050 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 363 flow [2024-05-12 12:53:05,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-05-12 12:53:05,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-05-12 12:53:05,050 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 363 flow [2024-05-12 12:53:05,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 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) [2024-05-12 12:53:05,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:05,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:05,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 12:53:05,051 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:05,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 789608427, now seen corresponding path program 1 times [2024-05-12 12:53:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:05,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947173015] [2024-05-12 12:53:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:05,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:05,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:05,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947173015] [2024-05-12 12:53:05,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947173015] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:05,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:05,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815998288] [2024-05-12 12:53:05,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:05,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:05,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:05,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:05,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:05,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:05,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:05,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:05,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:07,091 INFO L124 PetriNetUnfolderBase]: 18333/25164 cut-off events. [2024-05-12 12:53:07,091 INFO L125 PetriNetUnfolderBase]: For 22292/22292 co-relation queries the response was YES. [2024-05-12 12:53:07,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66013 conditions, 25164 events. 18333/25164 cut-off events. For 22292/22292 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 135133 event pairs, 4183 based on Foata normal form. 80/23746 useless extension candidates. Maximal degree in co-relation 45348. Up to 16815 conditions per place. [2024-05-12 12:53:07,217 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 130 selfloop transitions, 7 changer transitions 1/139 dead transitions. [2024-05-12 12:53:07,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 139 transitions, 850 flow [2024-05-12 12:53:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-05-12 12:53:07,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085106382978723 [2024-05-12 12:53:07,219 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 363 flow. Second operand 5 states and 143 transitions. [2024-05-12 12:53:07,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 139 transitions, 850 flow [2024-05-12 12:53:07,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 139 transitions, 837 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-05-12 12:53:07,248 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 380 flow [2024-05-12 12:53:07,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-05-12 12:53:07,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-05-12 12:53:07,248 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 380 flow [2024-05-12 12:53:07,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:07,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:07,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:07,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 12:53:07,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:07,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:07,250 INFO L85 PathProgramCache]: Analyzing trace with hash 778543287, now seen corresponding path program 2 times [2024-05-12 12:53:07,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:07,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365058623] [2024-05-12 12:53:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:07,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:07,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:07,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365058623] [2024-05-12 12:53:07,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365058623] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:07,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:07,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:07,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755277566] [2024-05-12 12:53:07,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:07,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:07,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:07,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:07,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 380 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:07,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:07,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:07,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:09,163 INFO L124 PetriNetUnfolderBase]: 19039/26089 cut-off events. [2024-05-12 12:53:09,163 INFO L125 PetriNetUnfolderBase]: For 30791/30791 co-relation queries the response was YES. [2024-05-12 12:53:09,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70114 conditions, 26089 events. 19039/26089 cut-off events. For 30791/30791 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 139456 event pairs, 4193 based on Foata normal form. 80/24613 useless extension candidates. Maximal degree in co-relation 53060. Up to 16151 conditions per place. [2024-05-12 12:53:09,276 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 130 selfloop transitions, 7 changer transitions 1/139 dead transitions. [2024-05-12 12:53:09,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 139 transitions, 861 flow [2024-05-12 12:53:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:09,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:09,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-05-12 12:53:09,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042553191489362 [2024-05-12 12:53:09,278 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 380 flow. Second operand 5 states and 142 transitions. [2024-05-12 12:53:09,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 139 transitions, 861 flow [2024-05-12 12:53:09,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 139 transitions, 849 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:09,339 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 388 flow [2024-05-12 12:53:09,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-05-12 12:53:09,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-05-12 12:53:09,340 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 388 flow [2024-05-12 12:53:09,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:09,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:09,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:09,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 12:53:09,342 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:09,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:09,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2001304841, now seen corresponding path program 1 times [2024-05-12 12:53:09,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:09,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973839793] [2024-05-12 12:53:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:09,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:09,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-05-12 12:53:09,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:09,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973839793] [2024-05-12 12:53:09,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973839793] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:09,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:09,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:09,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423385761] [2024-05-12 12:53:09,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:09,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 12:53:09,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:09,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 12:53:09,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 12:53:09,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2024-05-12 12:53:09,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:09,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:09,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2024-05-12 12:53:09,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:10,739 INFO L124 PetriNetUnfolderBase]: 14719/20385 cut-off events. [2024-05-12 12:53:10,739 INFO L125 PetriNetUnfolderBase]: For 26867/27109 co-relation queries the response was YES. [2024-05-12 12:53:10,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55334 conditions, 20385 events. 14719/20385 cut-off events. For 26867/27109 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 106914 event pairs, 10053 based on Foata normal form. 0/19343 useless extension candidates. Maximal degree in co-relation 48537. Up to 17397 conditions per place. [2024-05-12 12:53:10,848 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 88 selfloop transitions, 7 changer transitions 2/99 dead transitions. [2024-05-12 12:53:10,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 706 flow [2024-05-12 12:53:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-05-12 12:53:10,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723404255319149 [2024-05-12 12:53:10,850 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 388 flow. Second operand 5 states and 111 transitions. [2024-05-12 12:53:10,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 706 flow [2024-05-12 12:53:10,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 690 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:10,896 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 407 flow [2024-05-12 12:53:10,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=407, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2024-05-12 12:53:10,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-05-12 12:53:10,896 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 407 flow [2024-05-12 12:53:10,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:10,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:10,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:10,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 12:53:10,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:10,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash 704598033, now seen corresponding path program 1 times [2024-05-12 12:53:10,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:10,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222180691] [2024-05-12 12:53:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:10,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:53:10,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:10,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222180691] [2024-05-12 12:53:11,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222180691] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:11,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:11,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:11,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096858672] [2024-05-12 12:53:11,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:11,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:11,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:11,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:11,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2024-05-12 12:53:11,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 407 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:11,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:11,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2024-05-12 12:53:11,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:12,189 INFO L124 PetriNetUnfolderBase]: 12154/16756 cut-off events. [2024-05-12 12:53:12,189 INFO L125 PetriNetUnfolderBase]: For 20257/20469 co-relation queries the response was YES. [2024-05-12 12:53:12,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46144 conditions, 16756 events. 12154/16756 cut-off events. For 20257/20469 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 84772 event pairs, 5630 based on Foata normal form. 139/16817 useless extension candidates. Maximal degree in co-relation 42749. Up to 7744 conditions per place. [2024-05-12 12:53:12,267 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 106 selfloop transitions, 12 changer transitions 2/122 dead transitions. [2024-05-12 12:53:12,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 122 transitions, 823 flow [2024-05-12 12:53:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:53:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:53:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-05-12 12:53:12,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2024-05-12 12:53:12,269 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 407 flow. Second operand 6 states and 140 transitions. [2024-05-12 12:53:12,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 122 transitions, 823 flow [2024-05-12 12:53:12,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 122 transitions, 818 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:53:12,303 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 418 flow [2024-05-12 12:53:12,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=418, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2024-05-12 12:53:12,304 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-05-12 12:53:12,304 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 418 flow [2024-05-12 12:53:12,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:12,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:12,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:12,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 12:53:12,305 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:12,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:12,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1515835301, now seen corresponding path program 1 times [2024-05-12 12:53:12,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:12,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749631489] [2024-05-12 12:53:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:12,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:53:12,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:12,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749631489] [2024-05-12 12:53:12,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749631489] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:12,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:12,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:12,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421088346] [2024-05-12 12:53:12,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:12,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:12,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:12,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2024-05-12 12:53:12,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 418 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:12,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:12,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2024-05-12 12:53:12,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:13,232 INFO L124 PetriNetUnfolderBase]: 10144/13928 cut-off events. [2024-05-12 12:53:13,232 INFO L125 PetriNetUnfolderBase]: For 20276/20452 co-relation queries the response was YES. [2024-05-12 12:53:13,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39609 conditions, 13928 events. 10144/13928 cut-off events. For 20276/20452 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 67351 event pairs, 4473 based on Foata normal form. 123/13979 useless extension candidates. Maximal degree in co-relation 36804. Up to 7103 conditions per place. [2024-05-12 12:53:13,298 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 99 selfloop transitions, 13 changer transitions 1/115 dead transitions. [2024-05-12 12:53:13,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 115 transitions, 795 flow [2024-05-12 12:53:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:13,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-05-12 12:53:13,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361702127659574 [2024-05-12 12:53:13,300 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 418 flow. Second operand 5 states and 126 transitions. [2024-05-12 12:53:13,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 115 transitions, 795 flow [2024-05-12 12:53:13,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 115 transitions, 782 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:13,329 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 420 flow [2024-05-12 12:53:13,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=420, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-05-12 12:53:13,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-05-12 12:53:13,330 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 420 flow [2024-05-12 12:53:13,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:13,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:13,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:13,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 12:53:13,331 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:13,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash -983853551, now seen corresponding path program 1 times [2024-05-12 12:53:13,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:13,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968587322] [2024-05-12 12:53:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:13,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:13,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:13,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968587322] [2024-05-12 12:53:13,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968587322] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:13,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:13,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416730502] [2024-05-12 12:53:13,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:13,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:13,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:13,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:13,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:13,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 420 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:13,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:13,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:13,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:14,600 INFO L124 PetriNetUnfolderBase]: 10900/14774 cut-off events. [2024-05-12 12:53:14,601 INFO L125 PetriNetUnfolderBase]: For 25997/25997 co-relation queries the response was YES. [2024-05-12 12:53:14,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43421 conditions, 14774 events. 10900/14774 cut-off events. For 25997/25997 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 71387 event pairs, 2413 based on Foata normal form. 64/14838 useless extension candidates. Maximal degree in co-relation 40656. Up to 9583 conditions per place. [2024-05-12 12:53:14,659 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 128 selfloop transitions, 7 changer transitions 1/137 dead transitions. [2024-05-12 12:53:14,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 137 transitions, 919 flow [2024-05-12 12:53:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-05-12 12:53:14,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5872340425531914 [2024-05-12 12:53:14,661 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 420 flow. Second operand 5 states and 138 transitions. [2024-05-12 12:53:14,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 137 transitions, 919 flow [2024-05-12 12:53:14,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 137 transitions, 906 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 12:53:14,725 INFO L231 Difference]: Finished difference. Result has 83 places, 66 transitions, 438 flow [2024-05-12 12:53:14,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=83, PETRI_TRANSITIONS=66} [2024-05-12 12:53:14,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-05-12 12:53:14,726 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 66 transitions, 438 flow [2024-05-12 12:53:14,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:14,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:14,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:14,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 12:53:14,727 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:14,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:14,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1186200937, now seen corresponding path program 2 times [2024-05-12 12:53:14,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:14,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789943482] [2024-05-12 12:53:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:14,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:14,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:14,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789943482] [2024-05-12 12:53:14,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789943482] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:14,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:14,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:14,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482457897] [2024-05-12 12:53:14,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:14,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:14,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:14,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:14,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:14,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 66 transitions, 438 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:14,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:14,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:14,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:15,835 INFO L124 PetriNetUnfolderBase]: 10660/14470 cut-off events. [2024-05-12 12:53:15,835 INFO L125 PetriNetUnfolderBase]: For 28543/28543 co-relation queries the response was YES. [2024-05-12 12:53:15,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42541 conditions, 14470 events. 10660/14470 cut-off events. For 28543/28543 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 69796 event pairs, 2707 based on Foata normal form. 64/14534 useless extension candidates. Maximal degree in co-relation 39734. Up to 9567 conditions per place. [2024-05-12 12:53:15,910 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 125 selfloop transitions, 7 changer transitions 1/134 dead transitions. [2024-05-12 12:53:15,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 134 transitions, 917 flow [2024-05-12 12:53:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-05-12 12:53:15,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-05-12 12:53:15,912 INFO L175 Difference]: Start difference. First operand has 83 places, 66 transitions, 438 flow. Second operand 5 states and 135 transitions. [2024-05-12 12:53:15,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 134 transitions, 917 flow [2024-05-12 12:53:15,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 134 transitions, 903 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:15,993 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 442 flow [2024-05-12 12:53:15,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=442, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2024-05-12 12:53:15,994 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-05-12 12:53:15,994 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 442 flow [2024-05-12 12:53:15,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:15,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:15,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:15,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 12:53:15,995 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:15,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:15,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1737141590, now seen corresponding path program 1 times [2024-05-12 12:53:15,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:15,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694084799] [2024-05-12 12:53:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:15,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:16,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:16,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694084799] [2024-05-12 12:53:16,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694084799] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:16,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:16,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:16,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905253727] [2024-05-12 12:53:16,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:16,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:16,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:16,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:16,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:16,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:16,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:16,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:16,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:17,057 INFO L124 PetriNetUnfolderBase]: 11406/15451 cut-off events. [2024-05-12 12:53:17,058 INFO L125 PetriNetUnfolderBase]: For 32110/32110 co-relation queries the response was YES. [2024-05-12 12:53:17,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45698 conditions, 15451 events. 11406/15451 cut-off events. For 32110/32110 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 75215 event pairs, 2781 based on Foata normal form. 64/15515 useless extension candidates. Maximal degree in co-relation 42890. Up to 10261 conditions per place. [2024-05-12 12:53:17,137 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 129 selfloop transitions, 7 changer transitions 1/138 dead transitions. [2024-05-12 12:53:17,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 138 transitions, 946 flow [2024-05-12 12:53:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:17,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-05-12 12:53:17,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5872340425531914 [2024-05-12 12:53:17,139 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 442 flow. Second operand 5 states and 138 transitions. [2024-05-12 12:53:17,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 138 transitions, 946 flow [2024-05-12 12:53:17,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 138 transitions, 930 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:17,238 INFO L231 Difference]: Finished difference. Result has 87 places, 67 transitions, 456 flow [2024-05-12 12:53:17,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2024-05-12 12:53:17,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-05-12 12:53:17,239 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 456 flow [2024-05-12 12:53:17,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:17,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:17,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:17,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 12:53:17,239 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:17,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1737136940, now seen corresponding path program 2 times [2024-05-12 12:53:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:17,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629401770] [2024-05-12 12:53:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:17,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:17,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:17,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629401770] [2024-05-12 12:53:17,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629401770] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:17,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:17,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 12:53:17,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013591151] [2024-05-12 12:53:17,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:17,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:17,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:17,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:17,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-05-12 12:53:17,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:17,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 67 transitions, 456 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:17,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:17,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:17,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:18,191 INFO L124 PetriNetUnfolderBase]: 11166/15147 cut-off events. [2024-05-12 12:53:18,191 INFO L125 PetriNetUnfolderBase]: For 30884/30884 co-relation queries the response was YES. [2024-05-12 12:53:18,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44377 conditions, 15147 events. 11166/15147 cut-off events. For 30884/30884 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 73697 event pairs, 2611 based on Foata normal form. 64/15211 useless extension candidates. Maximal degree in co-relation 41568. Up to 10227 conditions per place. [2024-05-12 12:53:18,282 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 126 selfloop transitions, 7 changer transitions 1/135 dead transitions. [2024-05-12 12:53:18,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 135 transitions, 939 flow [2024-05-12 12:53:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 12:53:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 12:53:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-05-12 12:53:18,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-05-12 12:53:18,283 INFO L175 Difference]: Start difference. First operand has 87 places, 67 transitions, 456 flow. Second operand 5 states and 135 transitions. [2024-05-12 12:53:18,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 135 transitions, 939 flow [2024-05-12 12:53:18,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 135 transitions, 927 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:18,387 INFO L231 Difference]: Finished difference. Result has 89 places, 67 transitions, 462 flow [2024-05-12 12:53:18,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=462, PETRI_PLACES=89, PETRI_TRANSITIONS=67} [2024-05-12 12:53:18,387 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-05-12 12:53:18,387 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 67 transitions, 462 flow [2024-05-12 12:53:18,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:18,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:18,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:18,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 12:53:18,388 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:18,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash -561605464, now seen corresponding path program 1 times [2024-05-12 12:53:18,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:18,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60794796] [2024-05-12 12:53:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:18,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:18,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:18,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60794796] [2024-05-12 12:53:18,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60794796] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:18,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:18,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:18,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323842285] [2024-05-12 12:53:18,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:18,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:53:18,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:18,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:53:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:53:18,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:18,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 67 transitions, 462 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:18,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:18,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:18,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:19,701 INFO L124 PetriNetUnfolderBase]: 11912/16128 cut-off events. [2024-05-12 12:53:19,701 INFO L125 PetriNetUnfolderBase]: For 34200/34200 co-relation queries the response was YES. [2024-05-12 12:53:19,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47478 conditions, 16128 events. 11912/16128 cut-off events. For 34200/34200 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 78621 event pairs, 2399 based on Foata normal form. 64/16192 useless extension candidates. Maximal degree in co-relation 44668. Up to 9721 conditions per place. [2024-05-12 12:53:19,804 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 155 selfloop transitions, 7 changer transitions 1/164 dead transitions. [2024-05-12 12:53:19,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 164 transitions, 1096 flow [2024-05-12 12:53:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:53:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:53:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-05-12 12:53:19,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 12:53:19,806 INFO L175 Difference]: Start difference. First operand has 89 places, 67 transitions, 462 flow. Second operand 6 states and 168 transitions. [2024-05-12 12:53:19,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 164 transitions, 1096 flow [2024-05-12 12:53:19,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 164 transitions, 1082 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-05-12 12:53:19,921 INFO L231 Difference]: Finished difference. Result has 92 places, 67 transitions, 465 flow [2024-05-12 12:53:19,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=92, PETRI_TRANSITIONS=67} [2024-05-12 12:53:19,922 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-05-12 12:53:19,922 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 67 transitions, 465 flow [2024-05-12 12:53:19,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:19,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:19,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:19,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 12:53:19,923 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:19,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash -561600814, now seen corresponding path program 2 times [2024-05-12 12:53:19,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:19,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776931204] [2024-05-12 12:53:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:19,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:20,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:20,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776931204] [2024-05-12 12:53:20,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776931204] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:20,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:20,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:20,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917518480] [2024-05-12 12:53:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:20,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:53:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:53:20,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:53:20,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:20,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 67 transitions, 465 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:20,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:20,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:20,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:21,183 INFO L124 PetriNetUnfolderBase]: 12658/17109 cut-off events. [2024-05-12 12:53:21,183 INFO L125 PetriNetUnfolderBase]: For 37615/37615 co-relation queries the response was YES. [2024-05-12 12:53:21,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50527 conditions, 17109 events. 12658/17109 cut-off events. For 37615/37615 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 83467 event pairs, 2795 based on Foata normal form. 64/17173 useless extension candidates. Maximal degree in co-relation 47716. Up to 10879 conditions per place. [2024-05-12 12:53:21,375 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 152 selfloop transitions, 7 changer transitions 1/161 dead transitions. [2024-05-12 12:53:21,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 161 transitions, 1088 flow [2024-05-12 12:53:21,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:53:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:53:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 12:53:21,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-05-12 12:53:21,377 INFO L175 Difference]: Start difference. First operand has 92 places, 67 transitions, 465 flow. Second operand 6 states and 165 transitions. [2024-05-12 12:53:21,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 161 transitions, 1088 flow [2024-05-12 12:53:21,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 161 transitions, 1075 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:53:21,578 INFO L231 Difference]: Finished difference. Result has 94 places, 67 transitions, 469 flow [2024-05-12 12:53:21,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=94, PETRI_TRANSITIONS=67} [2024-05-12 12:53:21,578 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-05-12 12:53:21,579 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 67 transitions, 469 flow [2024-05-12 12:53:21,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:21,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:21,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:21,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 12:53:21,579 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:21,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash -561432484, now seen corresponding path program 3 times [2024-05-12 12:53:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:21,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063674608] [2024-05-12 12:53:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:21,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:21,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063674608] [2024-05-12 12:53:21,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063674608] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:21,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:21,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:21,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542982217] [2024-05-12 12:53:21,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:21,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:53:21,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:53:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:53:21,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:21,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 67 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:21,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:21,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:21,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:23,263 INFO L124 PetriNetUnfolderBase]: 13404/18090 cut-off events. [2024-05-12 12:53:23,263 INFO L125 PetriNetUnfolderBase]: For 41158/41158 co-relation queries the response was YES. [2024-05-12 12:53:23,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53592 conditions, 18090 events. 13404/18090 cut-off events. For 41158/41158 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 88644 event pairs, 3289 based on Foata normal form. 64/18154 useless extension candidates. Maximal degree in co-relation 50780. Up to 11699 conditions per place. [2024-05-12 12:53:23,453 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 155 selfloop transitions, 7 changer transitions 1/164 dead transitions. [2024-05-12 12:53:23,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 164 transitions, 1105 flow [2024-05-12 12:53:23,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:53:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:53:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-05-12 12:53:23,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957446808510638 [2024-05-12 12:53:23,456 INFO L175 Difference]: Start difference. First operand has 94 places, 67 transitions, 469 flow. Second operand 6 states and 168 transitions. [2024-05-12 12:53:23,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 164 transitions, 1105 flow [2024-05-12 12:53:23,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 164 transitions, 1092 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:53:23,605 INFO L231 Difference]: Finished difference. Result has 96 places, 67 transitions, 473 flow [2024-05-12 12:53:23,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=473, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2024-05-12 12:53:23,606 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-05-12 12:53:23,606 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 473 flow [2024-05-12 12:53:23,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:23,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:23,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:23,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 12:53:23,607 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:23,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:23,607 INFO L85 PathProgramCache]: Analyzing trace with hash -561422254, now seen corresponding path program 4 times [2024-05-12 12:53:23,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:23,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386722513] [2024-05-12 12:53:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:23,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:23,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386722513] [2024-05-12 12:53:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386722513] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:23,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:23,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772332866] [2024-05-12 12:53:23,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:23,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:53:23,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:53:23,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:53:23,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:23,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 473 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:23,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:23,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:23,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:25,055 INFO L124 PetriNetUnfolderBase]: 14150/19071 cut-off events. [2024-05-12 12:53:25,056 INFO L125 PetriNetUnfolderBase]: For 45070/45070 co-relation queries the response was YES. [2024-05-12 12:53:25,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56651 conditions, 19071 events. 14150/19071 cut-off events. For 45070/45070 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 93777 event pairs, 3681 based on Foata normal form. 64/19135 useless extension candidates. Maximal degree in co-relation 53838. Up to 12849 conditions per place. [2024-05-12 12:53:25,277 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 152 selfloop transitions, 7 changer transitions 1/161 dead transitions. [2024-05-12 12:53:25,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 161 transitions, 1100 flow [2024-05-12 12:53:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:53:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:53:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 12:53:25,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851063829787234 [2024-05-12 12:53:25,279 INFO L175 Difference]: Start difference. First operand has 96 places, 67 transitions, 473 flow. Second operand 6 states and 165 transitions. [2024-05-12 12:53:25,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 161 transitions, 1100 flow [2024-05-12 12:53:25,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 161 transitions, 1087 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:53:25,492 INFO L231 Difference]: Finished difference. Result has 98 places, 67 transitions, 477 flow [2024-05-12 12:53:25,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=477, PETRI_PLACES=98, PETRI_TRANSITIONS=67} [2024-05-12 12:53:25,492 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-05-12 12:53:25,493 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 67 transitions, 477 flow [2024-05-12 12:53:25,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:25,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:25,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:25,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 12:53:25,493 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:25,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:25,494 INFO L85 PathProgramCache]: Analyzing trace with hash -561283684, now seen corresponding path program 5 times [2024-05-12 12:53:25,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:25,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659538310] [2024-05-12 12:53:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:25,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:25,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:25,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659538310] [2024-05-12 12:53:25,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659538310] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:25,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:25,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:25,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012706599] [2024-05-12 12:53:25,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:25,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:53:25,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:25,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:53:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:53:25,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:25,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 67 transitions, 477 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:25,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:25,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:25,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:27,149 INFO L124 PetriNetUnfolderBase]: 14896/20052 cut-off events. [2024-05-12 12:53:27,150 INFO L125 PetriNetUnfolderBase]: For 48498/48498 co-relation queries the response was YES. [2024-05-12 12:53:27,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59708 conditions, 20052 events. 14896/20052 cut-off events. For 48498/48498 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 99438 event pairs, 3775 based on Foata normal form. 64/20116 useless extension candidates. Maximal degree in co-relation 56894. Up to 14107 conditions per place. [2024-05-12 12:53:27,307 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 149 selfloop transitions, 7 changer transitions 1/158 dead transitions. [2024-05-12 12:53:27,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 158 transitions, 1091 flow [2024-05-12 12:53:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:53:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:53:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-05-12 12:53:27,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-05-12 12:53:27,309 INFO L175 Difference]: Start difference. First operand has 98 places, 67 transitions, 477 flow. Second operand 6 states and 162 transitions. [2024-05-12 12:53:27,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 158 transitions, 1091 flow [2024-05-12 12:53:27,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 158 transitions, 1078 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 12:53:27,543 INFO L231 Difference]: Finished difference. Result has 100 places, 67 transitions, 481 flow [2024-05-12 12:53:27,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=481, PETRI_PLACES=100, PETRI_TRANSITIONS=67} [2024-05-12 12:53:27,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-05-12 12:53:27,544 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 67 transitions, 481 flow [2024-05-12 12:53:27,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:27,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:27,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:27,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 12:53:27,544 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:27,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:27,545 INFO L85 PathProgramCache]: Analyzing trace with hash -561278104, now seen corresponding path program 6 times [2024-05-12 12:53:27,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:27,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610929563] [2024-05-12 12:53:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:27,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-05-12 12:53:27,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610929563] [2024-05-12 12:53:27,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610929563] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 12:53:27,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 12:53:27,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 12:53:27,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494017944] [2024-05-12 12:53:27,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:27,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 12:53:27,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:27,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 12:53:27,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-05-12 12:53:27,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 47 [2024-05-12 12:53:27,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 67 transitions, 481 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:27,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:27,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 47 [2024-05-12 12:53:27,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 12:53:29,143 INFO L124 PetriNetUnfolderBase]: 14656/19748 cut-off events. [2024-05-12 12:53:29,143 INFO L125 PetriNetUnfolderBase]: For 43577/43577 co-relation queries the response was YES. [2024-05-12 12:53:29,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57959 conditions, 19748 events. 14656/19748 cut-off events. For 43577/43577 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 97692 event pairs, 3687 based on Foata normal form. 64/19812 useless extension candidates. Maximal degree in co-relation 55144. Up to 13795 conditions per place. [2024-05-12 12:53:29,298 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 148 selfloop transitions, 7 changer transitions 1/157 dead transitions. [2024-05-12 12:53:29,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 157 transitions, 1063 flow [2024-05-12 12:53:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 12:53:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 12:53:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-05-12 12:53:29,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5709219858156028 [2024-05-12 12:53:29,300 INFO L175 Difference]: Start difference. First operand has 100 places, 67 transitions, 481 flow. Second operand 6 states and 161 transitions. [2024-05-12 12:53:29,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 157 transitions, 1063 flow [2024-05-12 12:53:29,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 157 transitions, 1037 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-05-12 12:53:29,499 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 437 flow [2024-05-12 12:53:29,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=437, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2024-05-12 12:53:29,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-05-12 12:53:29,500 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 437 flow [2024-05-12 12:53:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:29,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 12:53:29,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 12:53:29,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 12:53:29,500 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 12:53:29,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 12:53:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1453570742, now seen corresponding path program 1 times [2024-05-12 12:53:29,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 12:53:29,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004966051] [2024-05-12 12:53:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 12:53:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:53:29,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 12:53:29,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004966051] [2024-05-12 12:53:29,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004966051] provided 0 perfect and 1 imperfect interpolant sequences [2024-05-12 12:53:29,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749707331] [2024-05-12 12:53:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 12:53:29,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-05-12 12:53:29,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 12:53:29,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-05-12 12:53:29,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-05-12 12:53:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 12:53:29,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2024-05-12 12:53:29,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-05-12 12:53:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:53:30,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-05-12 12:53:30,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-05-12 12:53:30,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 55 [2024-05-12 12:53:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-05-12 12:53:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749707331] provided 1 perfect and 1 imperfect interpolant sequences [2024-05-12 12:53:30,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-05-12 12:53:30,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2024-05-12 12:53:30,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406038382] [2024-05-12 12:53:30,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 12:53:30,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 12:53:30,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 12:53:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 12:53:30,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-05-12 12:53:30,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 47 [2024-05-12 12:53:30,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 437 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 12:53:30,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 12:53:30,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 47 [2024-05-12 12:53:30,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand