./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/pthread-wmm/safe018_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_rmo.opt.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 00:27:15,746 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 00:27:15,813 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 00:27:15,819 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 00:27:15,819 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 00:27:15,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 00:27:15,844 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 00:27:15,845 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 00:27:15,845 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 00:27:15,849 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 00:27:15,850 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 00:27:15,850 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 00:27:15,851 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 00:27:15,851 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 00:27:15,851 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 00:27:15,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 00:27:15,852 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 00:27:15,852 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 00:27:15,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 00:27:15,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 00:27:15,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 00:27:15,853 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 00:27:15,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 00:27:15,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 00:27:15,854 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 00:27:15,854 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 00:27:15,854 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 00:27:15,854 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 00:27:15,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 00:27:15,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 00:27:15,855 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 00:27:15,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 00:27:15,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:27:15,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 00:27:15,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 00:27:15,856 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 00:27:15,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 00:27:15,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 00:27:15,856 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 00:27:15,856 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 00:27:15,856 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 00:27:15,857 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 00:27:15,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 00:27:15,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 00:27:16,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 00:27:16,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 00:27:16,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 00:27:16,110 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 00:27:16,110 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 00:27:16,111 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.i [2024-06-28 00:27:17,152 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 00:27:17,374 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 00:27:17,375 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_rmo.opt.i [2024-06-28 00:27:17,388 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4aee239/44367eca87fd42228bc22862afba3b5c/FLAG33c4f1332 [2024-06-28 00:27:17,399 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4aee239/44367eca87fd42228bc22862afba3b5c [2024-06-28 00:27:17,401 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 00:27:17,404 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 00:27:17,404 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/safe018_rmo.opt.yml/witness.yml [2024-06-28 00:27:17,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 00:27:17,483 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 00:27:17,484 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 00:27:17,485 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 00:27:17,489 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 00:27:17,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:27:17" (1/2) ... [2024-06-28 00:27:17,491 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a46fd08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:27:17, skipping insertion in model container [2024-06-28 00:27:17,491 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 12:27:17" (1/2) ... [2024-06-28 00:27:17,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@56189d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 12:27:17, skipping insertion in model container [2024-06-28 00:27:17,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:27:17" (2/2) ... [2024-06-28 00:27:17,494 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a46fd08 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:17, skipping insertion in model container [2024-06-28 00:27:17,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:27:17" (2/2) ... [2024-06-28 00:27:17,495 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 00:27:17,519 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 00:27:17,521 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ! multithreaded || ((((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-28 00:27:17,521 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ! multithreaded || ((((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-28 00:27:17,521 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] ! multithreaded || ((((0LL - (long long )__unbuffered_p0_EAX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x >= 0LL) && (0LL - (long long )__unbuffered_p0_EBX) + (long long )x$mem_tmp >= 0LL) && (long long )x - (long long )x$mem_tmp >= 0LL) [2024-06-28 00:27:17,521 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 00:27:17,521 INFO L106 edCorrectnessWitness]: ghost_update [L850-L850] multithreaded = 1; [2024-06-28 00:27:17,563 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 00:27:17,888 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:27:17,912 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 00:27:18,040 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 00:27:18,082 INFO L206 MainTranslator]: Completed translation [2024-06-28 00:27:18,082 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18 WrapperNode [2024-06-28 00:27:18,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 00:27:18,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 00:27:18,083 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 00:27:18,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 00:27:18,089 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 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,120 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 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,153 INFO L138 Inliner]: procedures = 175, calls = 68, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 154 [2024-06-28 00:27:18,154 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 00:27:18,155 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 00:27:18,155 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 00:27:18,155 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 00:27:18,164 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,170 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,183 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 8 writes are split as follows [0, 8]. [2024-06-28 00:27:18,196 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,196 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,203 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,204 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,206 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,208 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,210 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 00:27:18,220 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 00:27:18,220 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 00:27:18,220 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 00:27:18,221 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (1/1) ... [2024-06-28 00:27:18,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 00:27:18,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 00:27:18,247 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) [2024-06-28 00:27:18,257 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 [2024-06-28 00:27:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 00:27:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 00:27:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 00:27:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 00:27:18,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 00:27:18,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 00:27:18,282 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 00:27:18,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 00:27:18,282 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 00:27:18,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 00:27:18,283 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 00:27:18,283 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 00:27:18,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 00:27:18,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 00:27:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 00:27:18,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 00:27:18,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 00:27:18,286 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 00:27:18,389 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 00:27:18,391 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 00:27:18,731 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 00:27:18,732 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 00:27:18,970 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 00:27:18,970 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 00:27:18,971 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:27:18 BoogieIcfgContainer [2024-06-28 00:27:18,971 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 00:27:18,973 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 00:27:18,973 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 00:27:18,975 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 00:27:18,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 12:27:17" (1/4) ... [2024-06-28 00:27:18,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4393834d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 12:27:18, skipping insertion in model container [2024-06-28 00:27:18,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 12:27:17" (2/4) ... [2024-06-28 00:27:18,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4393834d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:27:18, skipping insertion in model container [2024-06-28 00:27:18,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 12:27:18" (3/4) ... [2024-06-28 00:27:18,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4393834d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 12:27:18, skipping insertion in model container [2024-06-28 00:27:18,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 12:27:18" (4/4) ... [2024-06-28 00:27:18,987 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_rmo.opt.i [2024-06-28 00:27:19,001 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 00:27:19,001 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 00:27:19,002 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 00:27:19,050 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 00:27:19,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 00:27:19,104 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-28 00:27:19,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:27:19,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 46 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 00:27:19,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-28 00:27:19,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-28 00:27:19,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 00:27:19,129 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;@62e1f313, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 00:27:19,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 00:27:19,134 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 00:27:19,134 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-28 00:27:19,134 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 00:27:19,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:19,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 00:27:19,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:19,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 653692053, now seen corresponding path program 1 times [2024-06-28 00:27:19,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:19,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287971998] [2024-06-28 00:27:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:19,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:19,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:19,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287971998] [2024-06-28 00:27:19,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287971998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:19,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:19,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 00:27:19,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624947741] [2024-06-28 00:27:19,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:19,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 00:27:19,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:19,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 00:27:19,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 00:27:19,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 00:27:19,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:19,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:19,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 00:27:19,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:19,845 INFO L124 PetriNetUnfolderBase]: 429/761 cut-off events. [2024-06-28 00:27:19,846 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-06-28 00:27:19,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1480 conditions, 761 events. 429/761 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3959 event pairs, 234 based on Foata normal form. 1/741 useless extension candidates. Maximal degree in co-relation 1468. Up to 672 conditions per place. [2024-06-28 00:27:19,852 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-28 00:27:19,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 44 transitions, 173 flow [2024-06-28 00:27:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:27:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:27:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-28 00:27:19,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-28 00:27:19,875 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 74 transitions. [2024-06-28 00:27:19,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 44 transitions, 173 flow [2024-06-28 00:27:19,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:19,880 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-28 00:27:19,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-28 00:27:19,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-28 00:27:19,885 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-28 00:27:19,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:19,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:19,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:19,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 00:27:19,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:19,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:19,886 INFO L85 PathProgramCache]: Analyzing trace with hash 759722375, now seen corresponding path program 1 times [2024-06-28 00:27:19,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:19,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896190400] [2024-06-28 00:27:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:19,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:20,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:20,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896190400] [2024-06-28 00:27:20,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896190400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:20,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:20,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:27:20,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023096950] [2024-06-28 00:27:20,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:20,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:27:20,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:27:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:27:20,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:20,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:20,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:20,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:20,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:20,464 INFO L124 PetriNetUnfolderBase]: 587/1004 cut-off events. [2024-06-28 00:27:20,464 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2024-06-28 00:27:20,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2279 conditions, 1004 events. 587/1004 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5017 event pairs, 199 based on Foata normal form. 6/1000 useless extension candidates. Maximal degree in co-relation 2267. Up to 849 conditions per place. [2024-06-28 00:27:20,472 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 30 selfloop transitions, 5 changer transitions 0/43 dead transitions. [2024-06-28 00:27:20,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 43 transitions, 190 flow [2024-06-28 00:27:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 00:27:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 00:27:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-28 00:27:20,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-28 00:27:20,475 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 3 states and 69 transitions. [2024-06-28 00:27:20,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 43 transitions, 190 flow [2024-06-28 00:27:20,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:27:20,478 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 123 flow [2024-06-28 00:27:20,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 00:27:20,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2024-06-28 00:27:20,481 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 123 flow [2024-06-28 00:27:20,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:20,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:20,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:20,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 00:27:20,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:20,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash -450419782, now seen corresponding path program 1 times [2024-06-28 00:27:20,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:20,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418173769] [2024-06-28 00:27:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:20,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:20,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:20,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418173769] [2024-06-28 00:27:20,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418173769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:20,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:20,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 00:27:20,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026260595] [2024-06-28 00:27:20,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:20,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 00:27:20,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:20,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 00:27:20,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 00:27:20,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 00:27:20,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:20,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:20,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 00:27:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:20,731 INFO L124 PetriNetUnfolderBase]: 415/736 cut-off events. [2024-06-28 00:27:20,732 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-06-28 00:27:20,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 736 events. 415/736 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3797 event pairs, 182 based on Foata normal form. 2/735 useless extension candidates. Maximal degree in co-relation 1825. Up to 611 conditions per place. [2024-06-28 00:27:20,736 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 40 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2024-06-28 00:27:20,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 291 flow [2024-06-28 00:27:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:27:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:27:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-28 00:27:20,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-28 00:27:20,737 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 123 flow. Second operand 4 states and 95 transitions. [2024-06-28 00:27:20,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 291 flow [2024-06-28 00:27:20,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 00:27:20,739 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 172 flow [2024-06-28 00:27:20,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-28 00:27:20,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-28 00:27:20,740 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 172 flow [2024-06-28 00:27:20,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:20,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:20,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:20,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 00:27:20,741 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:20,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:20,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1064226955, now seen corresponding path program 1 times [2024-06-28 00:27:20,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:20,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063850781] [2024-06-28 00:27:20,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:20,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:20,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:20,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063850781] [2024-06-28 00:27:20,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063850781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:20,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:20,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:27:20,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074816980] [2024-06-28 00:27:20,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:20,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:27:20,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:20,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:27:20,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:27:20,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 00:27:20,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:20,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:20,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 00:27:20,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:21,193 INFO L124 PetriNetUnfolderBase]: 407/724 cut-off events. [2024-06-28 00:27:21,194 INFO L125 PetriNetUnfolderBase]: For 737/737 co-relation queries the response was YES. [2024-06-28 00:27:21,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2017 conditions, 724 events. 407/724 cut-off events. For 737/737 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3740 event pairs, 180 based on Foata normal form. 4/725 useless extension candidates. Maximal degree in co-relation 2001. Up to 605 conditions per place. [2024-06-28 00:27:21,198 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 38 selfloop transitions, 9 changer transitions 0/56 dead transitions. [2024-06-28 00:27:21,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 302 flow [2024-06-28 00:27:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:27:21,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:27:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-28 00:27:21,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-28 00:27:21,202 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 172 flow. Second operand 4 states and 93 transitions. [2024-06-28 00:27:21,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 302 flow [2024-06-28 00:27:21,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 56 transitions, 296 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 00:27:21,207 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 195 flow [2024-06-28 00:27:21,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-06-28 00:27:21,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-28 00:27:21,209 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 195 flow [2024-06-28 00:27:21,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:21,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:21,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:21,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 00:27:21,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:21,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash -162708552, now seen corresponding path program 1 times [2024-06-28 00:27:21,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:21,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797038229] [2024-06-28 00:27:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:21,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:21,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:21,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797038229] [2024-06-28 00:27:21,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797038229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:21,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:21,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:27:21,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415886192] [2024-06-28 00:27:21,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:21,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:27:21,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:27:21,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:27:21,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:21,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:21,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:21,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:21,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:21,654 INFO L124 PetriNetUnfolderBase]: 674/1179 cut-off events. [2024-06-28 00:27:21,654 INFO L125 PetriNetUnfolderBase]: For 1527/1527 co-relation queries the response was YES. [2024-06-28 00:27:21,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3350 conditions, 1179 events. 674/1179 cut-off events. For 1527/1527 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6409 event pairs, 93 based on Foata normal form. 12/1163 useless extension candidates. Maximal degree in co-relation 3331. Up to 730 conditions per place. [2024-06-28 00:27:21,661 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 50 selfloop transitions, 17 changer transitions 0/75 dead transitions. [2024-06-28 00:27:21,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 449 flow [2024-06-28 00:27:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:27:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:27:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-28 00:27:21,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-28 00:27:21,663 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 195 flow. Second operand 5 states and 116 transitions. [2024-06-28 00:27:21,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 449 flow [2024-06-28 00:27:21,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 431 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:21,666 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 295 flow [2024-06-28 00:27:21,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-28 00:27:21,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-28 00:27:21,667 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 295 flow [2024-06-28 00:27:21,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:21,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:21,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:21,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 00:27:21,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:21,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash -162588582, now seen corresponding path program 2 times [2024-06-28 00:27:21,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:21,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963741702] [2024-06-28 00:27:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:21,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:21,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:21,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963741702] [2024-06-28 00:27:21,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963741702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:21,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:21,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:27:21,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492909530] [2024-06-28 00:27:21,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:21,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:27:21,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:21,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:27:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:27:21,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:21,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 295 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:21,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:21,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:21,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:22,108 INFO L124 PetriNetUnfolderBase]: 677/1174 cut-off events. [2024-06-28 00:27:22,108 INFO L125 PetriNetUnfolderBase]: For 2993/2993 co-relation queries the response was YES. [2024-06-28 00:27:22,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3995 conditions, 1174 events. 677/1174 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6469 event pairs, 241 based on Foata normal form. 6/1150 useless extension candidates. Maximal degree in co-relation 3973. Up to 491 conditions per place. [2024-06-28 00:27:22,116 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 51 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2024-06-28 00:27:22,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 547 flow [2024-06-28 00:27:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:27:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:27:22,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-28 00:27:22,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-28 00:27:22,117 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 295 flow. Second operand 5 states and 108 transitions. [2024-06-28 00:27:22,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 547 flow [2024-06-28 00:27:22,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 527 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-28 00:27:22,122 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 367 flow [2024-06-28 00:27:22,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=367, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-28 00:27:22,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-28 00:27:22,123 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 367 flow [2024-06-28 00:27:22,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:22,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:22,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:22,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 00:27:22,124 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:22,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:22,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1197606027, now seen corresponding path program 1 times [2024-06-28 00:27:22,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:22,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112836405] [2024-06-28 00:27:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:22,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:22,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:22,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112836405] [2024-06-28 00:27:22,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112836405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:22,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:22,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:22,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394064813] [2024-06-28 00:27:22,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:22,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:22,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:22,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:22,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:22,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:22,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 367 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:22,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:22,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:22,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:22,688 INFO L124 PetriNetUnfolderBase]: 647/1148 cut-off events. [2024-06-28 00:27:22,688 INFO L125 PetriNetUnfolderBase]: For 3504/3504 co-relation queries the response was YES. [2024-06-28 00:27:22,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4073 conditions, 1148 events. 647/1148 cut-off events. For 3504/3504 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6201 event pairs, 85 based on Foata normal form. 16/1146 useless extension candidates. Maximal degree in co-relation 4047. Up to 721 conditions per place. [2024-06-28 00:27:22,695 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 53 selfloop transitions, 17 changer transitions 0/78 dead transitions. [2024-06-28 00:27:22,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 569 flow [2024-06-28 00:27:22,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:27:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:27:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-28 00:27:22,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-28 00:27:22,697 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 367 flow. Second operand 5 states and 113 transitions. [2024-06-28 00:27:22,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 569 flow [2024-06-28 00:27:22,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 553 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-28 00:27:22,702 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 396 flow [2024-06-28 00:27:22,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=396, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2024-06-28 00:27:22,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-28 00:27:22,703 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 396 flow [2024-06-28 00:27:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:22,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:22,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:22,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 00:27:22,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:22,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash -745271807, now seen corresponding path program 2 times [2024-06-28 00:27:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:22,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172532471] [2024-06-28 00:27:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:22,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:23,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:23,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172532471] [2024-06-28 00:27:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172532471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:23,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:23,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:23,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033712578] [2024-06-28 00:27:23,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:23,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:23,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:23,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:23,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:23,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 396 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:23,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:23,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:23,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:23,316 INFO L124 PetriNetUnfolderBase]: 651/1152 cut-off events. [2024-06-28 00:27:23,316 INFO L125 PetriNetUnfolderBase]: For 3973/3973 co-relation queries the response was YES. [2024-06-28 00:27:23,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4235 conditions, 1152 events. 651/1152 cut-off events. For 3973/3973 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6233 event pairs, 85 based on Foata normal form. 12/1142 useless extension candidates. Maximal degree in co-relation 4206. Up to 495 conditions per place. [2024-06-28 00:27:23,324 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 51 selfloop transitions, 17 changer transitions 0/76 dead transitions. [2024-06-28 00:27:23,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 604 flow [2024-06-28 00:27:23,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:27:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:27:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-28 00:27:23,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-28 00:27:23,326 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 396 flow. Second operand 5 states and 107 transitions. [2024-06-28 00:27:23,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 604 flow [2024-06-28 00:27:23,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 570 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:23,357 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 425 flow [2024-06-28 00:27:23,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2024-06-28 00:27:23,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-28 00:27:23,357 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 425 flow [2024-06-28 00:27:23,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:23,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:23,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:23,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 00:27:23,358 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:23,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:23,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1470901638, now seen corresponding path program 1 times [2024-06-28 00:27:23,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:23,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558875972] [2024-06-28 00:27:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:23,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:23,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:23,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558875972] [2024-06-28 00:27:23,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558875972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:23,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:23,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:27:23,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46356212] [2024-06-28 00:27:23,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:23,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:27:23,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:27:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:27:23,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:23,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 425 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:23,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:23,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:23,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:23,760 INFO L124 PetriNetUnfolderBase]: 643/1149 cut-off events. [2024-06-28 00:27:23,760 INFO L125 PetriNetUnfolderBase]: For 4782/4782 co-relation queries the response was YES. [2024-06-28 00:27:23,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4406 conditions, 1149 events. 643/1149 cut-off events. For 4782/4782 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6217 event pairs, 186 based on Foata normal form. 3/1151 useless extension candidates. Maximal degree in co-relation 4375. Up to 997 conditions per place. [2024-06-28 00:27:23,769 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 60 selfloop transitions, 7 changer transitions 0/75 dead transitions. [2024-06-28 00:27:23,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 75 transitions, 653 flow [2024-06-28 00:27:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:27:23,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:27:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-06-28 00:27:23,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-28 00:27:23,770 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 425 flow. Second operand 4 states and 85 transitions. [2024-06-28 00:27:23,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 75 transitions, 653 flow [2024-06-28 00:27:23,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 625 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:23,779 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 488 flow [2024-06-28 00:27:23,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=488, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2024-06-28 00:27:23,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-28 00:27:23,780 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 488 flow [2024-06-28 00:27:23,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:23,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:23,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:23,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 00:27:23,780 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:23,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:23,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1097641209, now seen corresponding path program 1 times [2024-06-28 00:27:23,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:23,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528046424] [2024-06-28 00:27:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:23,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:23,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:23,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528046424] [2024-06-28 00:27:23,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528046424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:23,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:23,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 00:27:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197837188] [2024-06-28 00:27:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:23,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 00:27:23,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:23,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 00:27:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 00:27:23,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 00:27:23,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 488 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:23,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:23,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 00:27:23,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:24,170 INFO L124 PetriNetUnfolderBase]: 567/1056 cut-off events. [2024-06-28 00:27:24,170 INFO L125 PetriNetUnfolderBase]: For 4401/4401 co-relation queries the response was YES. [2024-06-28 00:27:24,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4060 conditions, 1056 events. 567/1056 cut-off events. For 4401/4401 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5920 event pairs, 172 based on Foata normal form. 2/1053 useless extension candidates. Maximal degree in co-relation 4028. Up to 788 conditions per place. [2024-06-28 00:27:24,178 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 54 selfloop transitions, 23 changer transitions 0/88 dead transitions. [2024-06-28 00:27:24,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 790 flow [2024-06-28 00:27:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:27:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:27:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-28 00:27:24,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-28 00:27:24,180 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 488 flow. Second operand 5 states and 110 transitions. [2024-06-28 00:27:24,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 790 flow [2024-06-28 00:27:24,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 88 transitions, 784 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-28 00:27:24,190 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 671 flow [2024-06-28 00:27:24,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=671, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2024-06-28 00:27:24,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-28 00:27:24,191 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 671 flow [2024-06-28 00:27:24,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:24,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:24,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:24,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 00:27:24,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:24,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:24,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1015194823, now seen corresponding path program 1 times [2024-06-28 00:27:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:24,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372998202] [2024-06-28 00:27:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:24,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:24,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:24,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372998202] [2024-06-28 00:27:24,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372998202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:24,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:24,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:27:24,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529583589] [2024-06-28 00:27:24,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:24,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:27:24,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:24,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:27:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:27:24,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:24,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:24,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:24,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:24,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:24,565 INFO L124 PetriNetUnfolderBase]: 647/1155 cut-off events. [2024-06-28 00:27:24,566 INFO L125 PetriNetUnfolderBase]: For 5781/5781 co-relation queries the response was YES. [2024-06-28 00:27:24,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4764 conditions, 1155 events. 647/1155 cut-off events. For 5781/5781 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6279 event pairs, 146 based on Foata normal form. 3/1151 useless extension candidates. Maximal degree in co-relation 4727. Up to 924 conditions per place. [2024-06-28 00:27:24,574 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 62 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2024-06-28 00:27:24,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 875 flow [2024-06-28 00:27:24,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:27:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:27:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-06-28 00:27:24,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-28 00:27:24,575 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 671 flow. Second operand 4 states and 84 transitions. [2024-06-28 00:27:24,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 875 flow [2024-06-28 00:27:24,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 824 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:24,587 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 687 flow [2024-06-28 00:27:24,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=687, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-06-28 00:27:24,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-28 00:27:24,588 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 687 flow [2024-06-28 00:27:24,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:24,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:24,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:24,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 00:27:24,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:24,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1045961841, now seen corresponding path program 2 times [2024-06-28 00:27:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:24,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965787950] [2024-06-28 00:27:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:24,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:24,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965787950] [2024-06-28 00:27:24,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965787950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:24,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:24,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:27:24,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094323794] [2024-06-28 00:27:24,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:24,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:27:24,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:24,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:27:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:27:24,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:24,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 687 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:24,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:24,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:24,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:24,991 INFO L124 PetriNetUnfolderBase]: 659/1186 cut-off events. [2024-06-28 00:27:24,992 INFO L125 PetriNetUnfolderBase]: For 6529/6529 co-relation queries the response was YES. [2024-06-28 00:27:24,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4865 conditions, 1186 events. 659/1186 cut-off events. For 6529/6529 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6554 event pairs, 152 based on Foata normal form. 9/1189 useless extension candidates. Maximal degree in co-relation 4827. Up to 861 conditions per place. [2024-06-28 00:27:25,002 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 67 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2024-06-28 00:27:25,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 92 transitions, 943 flow [2024-06-28 00:27:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:27:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:27:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-06-28 00:27:25,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-28 00:27:25,004 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 687 flow. Second operand 5 states and 102 transitions. [2024-06-28 00:27:25,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 92 transitions, 943 flow [2024-06-28 00:27:25,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 92 transitions, 918 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:25,014 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 713 flow [2024-06-28 00:27:25,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=713, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-06-28 00:27:25,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-28 00:27:25,015 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 713 flow [2024-06-28 00:27:25,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:25,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:25,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:25,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 00:27:25,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:25,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:25,017 INFO L85 PathProgramCache]: Analyzing trace with hash -15652270, now seen corresponding path program 1 times [2024-06-28 00:27:25,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:25,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770629920] [2024-06-28 00:27:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:25,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:25,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:25,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770629920] [2024-06-28 00:27:25,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770629920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:25,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:25,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:27:25,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857649967] [2024-06-28 00:27:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:25,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:27:25,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:27:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:27:25,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-28 00:27:25,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 713 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:25,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:25,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-28 00:27:25,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:25,630 INFO L124 PetriNetUnfolderBase]: 581/1089 cut-off events. [2024-06-28 00:27:25,631 INFO L125 PetriNetUnfolderBase]: For 6601/6601 co-relation queries the response was YES. [2024-06-28 00:27:25,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4582 conditions, 1089 events. 581/1089 cut-off events. For 6601/6601 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6179 event pairs, 142 based on Foata normal form. 4/1088 useless extension candidates. Maximal degree in co-relation 4543. Up to 813 conditions per place. [2024-06-28 00:27:25,638 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 60 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-28 00:27:25,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 93 transitions, 915 flow [2024-06-28 00:27:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:27:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:27:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-28 00:27:25,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-28 00:27:25,639 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 713 flow. Second operand 5 states and 110 transitions. [2024-06-28 00:27:25,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 93 transitions, 915 flow [2024-06-28 00:27:25,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 93 transitions, 883 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:25,651 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 731 flow [2024-06-28 00:27:25,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=681, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=731, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2024-06-28 00:27:25,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-28 00:27:25,652 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 731 flow [2024-06-28 00:27:25,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:25,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:25,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:25,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 00:27:25,653 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:25,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:25,653 INFO L85 PathProgramCache]: Analyzing trace with hash -332859075, now seen corresponding path program 1 times [2024-06-28 00:27:25,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:25,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850254132] [2024-06-28 00:27:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:25,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:25,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:25,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850254132] [2024-06-28 00:27:25,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850254132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:25,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:25,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:27:25,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004574665] [2024-06-28 00:27:25,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:25,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:27:25,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:27:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:27:25,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:25,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 731 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:25,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:25,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:25,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:26,046 INFO L124 PetriNetUnfolderBase]: 663/1172 cut-off events. [2024-06-28 00:27:26,046 INFO L125 PetriNetUnfolderBase]: For 6913/6913 co-relation queries the response was YES. [2024-06-28 00:27:26,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4945 conditions, 1172 events. 663/1172 cut-off events. For 6913/6913 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6293 event pairs, 208 based on Foata normal form. 1/1162 useless extension candidates. Maximal degree in co-relation 4905. Up to 883 conditions per place. [2024-06-28 00:27:26,054 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 88 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-06-28 00:27:26,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 117 transitions, 1218 flow [2024-06-28 00:27:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 00:27:26,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-28 00:27:26,065 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 731 flow. Second operand 6 states and 126 transitions. [2024-06-28 00:27:26,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 117 transitions, 1218 flow [2024-06-28 00:27:26,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 1174 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:26,078 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 872 flow [2024-06-28 00:27:26,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=872, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2024-06-28 00:27:26,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-28 00:27:26,079 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 872 flow [2024-06-28 00:27:26,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:26,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:26,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:26,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 00:27:26,080 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:26,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash -492389989, now seen corresponding path program 2 times [2024-06-28 00:27:26,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:26,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602120080] [2024-06-28 00:27:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:26,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:26,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:26,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602120080] [2024-06-28 00:27:26,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602120080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:26,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:26,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:27:26,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557546262] [2024-06-28 00:27:26,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:26,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:27:26,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:26,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:27:26,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:27:26,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:26,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 872 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:26,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:26,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:26,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:26,425 INFO L124 PetriNetUnfolderBase]: 714/1271 cut-off events. [2024-06-28 00:27:26,425 INFO L125 PetriNetUnfolderBase]: For 8611/8611 co-relation queries the response was YES. [2024-06-28 00:27:26,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5584 conditions, 1271 events. 714/1271 cut-off events. For 8611/8611 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6975 event pairs, 181 based on Foata normal form. 1/1269 useless extension candidates. Maximal degree in co-relation 5541. Up to 979 conditions per place. [2024-06-28 00:27:26,433 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 95 selfloop transitions, 22 changer transitions 0/125 dead transitions. [2024-06-28 00:27:26,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 1318 flow [2024-06-28 00:27:26,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-28 00:27:26,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-28 00:27:26,435 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 872 flow. Second operand 6 states and 131 transitions. [2024-06-28 00:27:26,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 1318 flow [2024-06-28 00:27:26,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 125 transitions, 1293 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-28 00:27:26,447 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 1003 flow [2024-06-28 00:27:26,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1003, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2024-06-28 00:27:26,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-28 00:27:26,448 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 1003 flow [2024-06-28 00:27:26,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:26,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:26,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:26,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 00:27:26,449 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:26,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:26,449 INFO L85 PathProgramCache]: Analyzing trace with hash -185042085, now seen corresponding path program 3 times [2024-06-28 00:27:26,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:26,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337273701] [2024-06-28 00:27:26,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:26,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:26,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:26,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337273701] [2024-06-28 00:27:26,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337273701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:26,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:26,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:27:26,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543571759] [2024-06-28 00:27:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:26,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:27:26,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:26,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:27:26,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:27:26,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:26,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 1003 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:26,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:26,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:26,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:26,764 INFO L124 PetriNetUnfolderBase]: 706/1260 cut-off events. [2024-06-28 00:27:26,765 INFO L125 PetriNetUnfolderBase]: For 9812/9812 co-relation queries the response was YES. [2024-06-28 00:27:26,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5699 conditions, 1260 events. 706/1260 cut-off events. For 9812/9812 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6899 event pairs, 172 based on Foata normal form. 3/1260 useless extension candidates. Maximal degree in co-relation 5651. Up to 976 conditions per place. [2024-06-28 00:27:26,775 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 94 selfloop transitions, 21 changer transitions 0/123 dead transitions. [2024-06-28 00:27:26,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 123 transitions, 1358 flow [2024-06-28 00:27:26,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:26,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-28 00:27:26,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508130081300813 [2024-06-28 00:27:26,776 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 1003 flow. Second operand 6 states and 125 transitions. [2024-06-28 00:27:26,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 123 transitions, 1358 flow [2024-06-28 00:27:26,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 123 transitions, 1324 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:26,792 INFO L231 Difference]: Finished difference. Result has 102 places, 99 transitions, 1057 flow [2024-06-28 00:27:26,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1057, PETRI_PLACES=102, PETRI_TRANSITIONS=99} [2024-06-28 00:27:26,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-28 00:27:26,792 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 99 transitions, 1057 flow [2024-06-28 00:27:26,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:26,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:26,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:26,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 00:27:26,793 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:26,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:26,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1954830366, now seen corresponding path program 1 times [2024-06-28 00:27:26,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:26,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442462886] [2024-06-28 00:27:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:26,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:27,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:27,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442462886] [2024-06-28 00:27:27,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442462886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:27,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:27,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107949161] [2024-06-28 00:27:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:27,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:27,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:27,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:27,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:27,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:27,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 99 transitions, 1057 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:27,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:27,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:27,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:27,272 INFO L124 PetriNetUnfolderBase]: 693/1239 cut-off events. [2024-06-28 00:27:27,272 INFO L125 PetriNetUnfolderBase]: For 11205/11205 co-relation queries the response was YES. [2024-06-28 00:27:27,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5653 conditions, 1239 events. 693/1239 cut-off events. For 11205/11205 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6843 event pairs, 150 based on Foata normal form. 6/1239 useless extension candidates. Maximal degree in co-relation 5602. Up to 964 conditions per place. [2024-06-28 00:27:27,286 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 85 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2024-06-28 00:27:27,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 109 transitions, 1291 flow [2024-06-28 00:27:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 00:27:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 00:27:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-06-28 00:27:27,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-28 00:27:27,288 INFO L175 Difference]: Start difference. First operand has 102 places, 99 transitions, 1057 flow. Second operand 4 states and 85 transitions. [2024-06-28 00:27:27,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 109 transitions, 1291 flow [2024-06-28 00:27:27,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 1267 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:27,313 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 1076 flow [2024-06-28 00:27:27,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1076, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-28 00:27:27,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-28 00:27:27,314 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 1076 flow [2024-06-28 00:27:27,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:27,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:27,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:27,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 00:27:27,314 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:27,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:27,315 INFO L85 PathProgramCache]: Analyzing trace with hash -485218556, now seen corresponding path program 1 times [2024-06-28 00:27:27,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:27,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394926730] [2024-06-28 00:27:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:27,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:27,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:27,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:27,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394926730] [2024-06-28 00:27:27,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394926730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:27,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:27,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:27,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352487925] [2024-06-28 00:27:27,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:27,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:27,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:27,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:27,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:27,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 1076 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:27,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:27,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:27,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:28,004 INFO L124 PetriNetUnfolderBase]: 675/1217 cut-off events. [2024-06-28 00:27:28,004 INFO L125 PetriNetUnfolderBase]: For 11250/11250 co-relation queries the response was YES. [2024-06-28 00:27:28,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5481 conditions, 1217 events. 675/1217 cut-off events. For 11250/11250 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6666 event pairs, 173 based on Foata normal form. 8/1222 useless extension candidates. Maximal degree in co-relation 5429. Up to 879 conditions per place. [2024-06-28 00:27:28,015 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 99 selfloop transitions, 22 changer transitions 0/129 dead transitions. [2024-06-28 00:27:28,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 129 transitions, 1459 flow [2024-06-28 00:27:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:28,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-28 00:27:28,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-28 00:27:28,017 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 1076 flow. Second operand 6 states and 127 transitions. [2024-06-28 00:27:28,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 129 transitions, 1459 flow [2024-06-28 00:27:28,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 129 transitions, 1423 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:28,036 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 1117 flow [2024-06-28 00:27:28,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1117, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2024-06-28 00:27:28,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-28 00:27:28,037 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 1117 flow [2024-06-28 00:27:28,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:28,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:28,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:28,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 00:27:28,037 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:28,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:28,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1915781370, now seen corresponding path program 1 times [2024-06-28 00:27:28,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:28,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800918870] [2024-06-28 00:27:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:28,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:28,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:28,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800918870] [2024-06-28 00:27:28,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800918870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:28,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:28,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:28,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946278635] [2024-06-28 00:27:28,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:28,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:28,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:28,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:28,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 1117 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:28,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:28,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:28,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:28,593 INFO L124 PetriNetUnfolderBase]: 690/1246 cut-off events. [2024-06-28 00:27:28,593 INFO L125 PetriNetUnfolderBase]: For 11198/11198 co-relation queries the response was YES. [2024-06-28 00:27:28,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5627 conditions, 1246 events. 690/1246 cut-off events. For 11198/11198 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6878 event pairs, 175 based on Foata normal form. 8/1251 useless extension candidates. Maximal degree in co-relation 5573. Up to 941 conditions per place. [2024-06-28 00:27:28,601 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 102 selfloop transitions, 25 changer transitions 0/135 dead transitions. [2024-06-28 00:27:28,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 135 transitions, 1509 flow [2024-06-28 00:27:28,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 00:27:28,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-28 00:27:28,603 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 1117 flow. Second operand 8 states and 161 transitions. [2024-06-28 00:27:28,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 135 transitions, 1509 flow [2024-06-28 00:27:28,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 135 transitions, 1462 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:28,621 INFO L231 Difference]: Finished difference. Result has 113 places, 102 transitions, 1137 flow [2024-06-28 00:27:28,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1137, PETRI_PLACES=113, PETRI_TRANSITIONS=102} [2024-06-28 00:27:28,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-28 00:27:28,622 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 102 transitions, 1137 flow [2024-06-28 00:27:28,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:28,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:28,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:28,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 00:27:28,623 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:28,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash -674271390, now seen corresponding path program 2 times [2024-06-28 00:27:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:28,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615000708] [2024-06-28 00:27:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:28,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:28,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615000708] [2024-06-28 00:27:28,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615000708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:28,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:28,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:28,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515220373] [2024-06-28 00:27:28,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:28,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:28,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:28,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:28,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:28,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 102 transitions, 1137 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:28,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:28,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:28,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:29,150 INFO L124 PetriNetUnfolderBase]: 677/1229 cut-off events. [2024-06-28 00:27:29,150 INFO L125 PetriNetUnfolderBase]: For 10589/10589 co-relation queries the response was YES. [2024-06-28 00:27:29,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5424 conditions, 1229 events. 677/1229 cut-off events. For 10589/10589 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6797 event pairs, 154 based on Foata normal form. 6/1234 useless extension candidates. Maximal degree in co-relation 5370. Up to 935 conditions per place. [2024-06-28 00:27:29,160 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 98 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-06-28 00:27:29,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 132 transitions, 1469 flow [2024-06-28 00:27:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:29,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-28 00:27:29,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-28 00:27:29,162 INFO L175 Difference]: Start difference. First operand has 113 places, 102 transitions, 1137 flow. Second operand 8 states and 158 transitions. [2024-06-28 00:27:29,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 132 transitions, 1469 flow [2024-06-28 00:27:29,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 132 transitions, 1408 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 00:27:29,183 INFO L231 Difference]: Finished difference. Result has 115 places, 102 transitions, 1137 flow [2024-06-28 00:27:29,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1137, PETRI_PLACES=115, PETRI_TRANSITIONS=102} [2024-06-28 00:27:29,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-28 00:27:29,184 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 102 transitions, 1137 flow [2024-06-28 00:27:29,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:29,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:29,184 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] [2024-06-28 00:27:29,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 00:27:29,185 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:29,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash -915332219, now seen corresponding path program 1 times [2024-06-28 00:27:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:29,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158757185] [2024-06-28 00:27:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:29,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:29,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:29,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158757185] [2024-06-28 00:27:29,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158757185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:29,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:29,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:29,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011619608] [2024-06-28 00:27:29,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:29,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:29,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:29,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:29,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:29,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 102 transitions, 1137 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:29,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:29,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:29,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:29,794 INFO L124 PetriNetUnfolderBase]: 672/1210 cut-off events. [2024-06-28 00:27:29,795 INFO L125 PetriNetUnfolderBase]: For 10519/10519 co-relation queries the response was YES. [2024-06-28 00:27:29,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5410 conditions, 1210 events. 672/1210 cut-off events. For 10519/10519 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6661 event pairs, 79 based on Foata normal form. 2/1206 useless extension candidates. Maximal degree in co-relation 5355. Up to 697 conditions per place. [2024-06-28 00:27:29,804 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 77 selfloop transitions, 39 changer transitions 0/124 dead transitions. [2024-06-28 00:27:29,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 124 transitions, 1455 flow [2024-06-28 00:27:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-28 00:27:29,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-28 00:27:29,805 INFO L175 Difference]: Start difference. First operand has 115 places, 102 transitions, 1137 flow. Second operand 6 states and 129 transitions. [2024-06-28 00:27:29,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 124 transitions, 1455 flow [2024-06-28 00:27:29,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 124 transitions, 1394 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-28 00:27:29,824 INFO L231 Difference]: Finished difference. Result has 114 places, 102 transitions, 1168 flow [2024-06-28 00:27:29,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1168, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2024-06-28 00:27:29,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-28 00:27:29,825 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 1168 flow [2024-06-28 00:27:29,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:29,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:29,825 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] [2024-06-28 00:27:29,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 00:27:29,825 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:29,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:29,826 INFO L85 PathProgramCache]: Analyzing trace with hash -167976882, now seen corresponding path program 1 times [2024-06-28 00:27:29,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:29,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045668619] [2024-06-28 00:27:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:29,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:30,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:30,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045668619] [2024-06-28 00:27:30,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045668619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:30,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:30,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:30,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571422762] [2024-06-28 00:27:30,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:30,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:30,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:30,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:30,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:30,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:30,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 1168 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:30,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:30,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:30,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:30,311 INFO L124 PetriNetUnfolderBase]: 744/1317 cut-off events. [2024-06-28 00:27:30,311 INFO L125 PetriNetUnfolderBase]: For 12911/12916 co-relation queries the response was YES. [2024-06-28 00:27:30,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6152 conditions, 1317 events. 744/1317 cut-off events. For 12911/12916 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7301 event pairs, 199 based on Foata normal form. 5/1312 useless extension candidates. Maximal degree in co-relation 6097. Up to 775 conditions per place. [2024-06-28 00:27:30,319 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 74 selfloop transitions, 56 changer transitions 0/138 dead transitions. [2024-06-28 00:27:30,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 138 transitions, 1668 flow [2024-06-28 00:27:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-28 00:27:30,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-28 00:27:30,320 INFO L175 Difference]: Start difference. First operand has 114 places, 102 transitions, 1168 flow. Second operand 8 states and 161 transitions. [2024-06-28 00:27:30,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 138 transitions, 1668 flow [2024-06-28 00:27:30,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 138 transitions, 1560 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 00:27:30,339 INFO L231 Difference]: Finished difference. Result has 119 places, 111 transitions, 1333 flow [2024-06-28 00:27:30,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1333, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2024-06-28 00:27:30,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-28 00:27:30,340 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 1333 flow [2024-06-28 00:27:30,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:30,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:30,341 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] [2024-06-28 00:27:30,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 00:27:30,341 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:30,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:30,341 INFO L85 PathProgramCache]: Analyzing trace with hash -644597576, now seen corresponding path program 2 times [2024-06-28 00:27:30,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:30,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300694338] [2024-06-28 00:27:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:30,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:30,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:30,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300694338] [2024-06-28 00:27:30,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300694338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:30,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:30,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:30,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055233630] [2024-06-28 00:27:30,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:30,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:30,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:30,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:30,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:30,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 1333 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:30,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:30,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:30,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:30,734 INFO L124 PetriNetUnfolderBase]: 875/1535 cut-off events. [2024-06-28 00:27:30,735 INFO L125 PetriNetUnfolderBase]: For 16755/16760 co-relation queries the response was YES. [2024-06-28 00:27:30,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8028 conditions, 1535 events. 875/1535 cut-off events. For 16755/16760 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8583 event pairs, 163 based on Foata normal form. 7/1538 useless extension candidates. Maximal degree in co-relation 7970. Up to 1079 conditions per place. [2024-06-28 00:27:30,746 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 108 selfloop transitions, 41 changer transitions 0/157 dead transitions. [2024-06-28 00:27:30,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 157 transitions, 2092 flow [2024-06-28 00:27:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-28 00:27:30,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-28 00:27:30,747 INFO L175 Difference]: Start difference. First operand has 119 places, 111 transitions, 1333 flow. Second operand 6 states and 129 transitions. [2024-06-28 00:27:30,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 157 transitions, 2092 flow [2024-06-28 00:27:30,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 157 transitions, 1973 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:30,777 INFO L231 Difference]: Finished difference. Result has 124 places, 128 transitions, 1652 flow [2024-06-28 00:27:30,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1652, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2024-06-28 00:27:30,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-28 00:27:30,777 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 1652 flow [2024-06-28 00:27:30,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:30,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:30,778 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] [2024-06-28 00:27:30,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 00:27:30,778 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:30,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:30,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1198917566, now seen corresponding path program 3 times [2024-06-28 00:27:30,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:30,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360404174] [2024-06-28 00:27:30,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:30,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:30,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:30,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360404174] [2024-06-28 00:27:30,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360404174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:30,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:30,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:30,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294301809] [2024-06-28 00:27:30,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:30,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:30,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:30,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:30,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:30,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 1652 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:30,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:30,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:30,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:31,195 INFO L124 PetriNetUnfolderBase]: 872/1537 cut-off events. [2024-06-28 00:27:31,195 INFO L125 PetriNetUnfolderBase]: For 17191/17196 co-relation queries the response was YES. [2024-06-28 00:27:31,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8215 conditions, 1537 events. 872/1537 cut-off events. For 17191/17196 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8640 event pairs, 172 based on Foata normal form. 5/1538 useless extension candidates. Maximal degree in co-relation 8153. Up to 1078 conditions per place. [2024-06-28 00:27:31,207 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 105 selfloop transitions, 47 changer transitions 0/160 dead transitions. [2024-06-28 00:27:31,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 160 transitions, 2162 flow [2024-06-28 00:27:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:31,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-28 00:27:31,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-28 00:27:31,208 INFO L175 Difference]: Start difference. First operand has 124 places, 128 transitions, 1652 flow. Second operand 6 states and 134 transitions. [2024-06-28 00:27:31,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 160 transitions, 2162 flow [2024-06-28 00:27:31,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 160 transitions, 2129 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:31,243 INFO L231 Difference]: Finished difference. Result has 130 places, 133 transitions, 1874 flow [2024-06-28 00:27:31,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1874, PETRI_PLACES=130, PETRI_TRANSITIONS=133} [2024-06-28 00:27:31,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-28 00:27:31,243 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 133 transitions, 1874 flow [2024-06-28 00:27:31,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:31,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:31,244 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] [2024-06-28 00:27:31,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 00:27:31,244 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:31,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash -2070043634, now seen corresponding path program 4 times [2024-06-28 00:27:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:31,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439678177] [2024-06-28 00:27:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:31,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:31,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:31,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439678177] [2024-06-28 00:27:31,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439678177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:31,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:31,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:31,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102695625] [2024-06-28 00:27:31,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:31,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:31,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:31,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:31,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:31,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 133 transitions, 1874 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:31,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:31,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:31,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:31,766 INFO L124 PetriNetUnfolderBase]: 890/1540 cut-off events. [2024-06-28 00:27:31,766 INFO L125 PetriNetUnfolderBase]: For 19338/19343 co-relation queries the response was YES. [2024-06-28 00:27:31,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8795 conditions, 1540 events. 890/1540 cut-off events. For 19338/19343 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8581 event pairs, 315 based on Foata normal form. 5/1532 useless extension candidates. Maximal degree in co-relation 8730. Up to 720 conditions per place. [2024-06-28 00:27:31,779 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 90 selfloop transitions, 67 changer transitions 0/165 dead transitions. [2024-06-28 00:27:31,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 165 transitions, 2432 flow [2024-06-28 00:27:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:31,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 00:27:31,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-28 00:27:31,781 INFO L175 Difference]: Start difference. First operand has 130 places, 133 transitions, 1874 flow. Second operand 7 states and 144 transitions. [2024-06-28 00:27:31,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 165 transitions, 2432 flow [2024-06-28 00:27:31,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 165 transitions, 2383 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:31,848 INFO L231 Difference]: Finished difference. Result has 137 places, 140 transitions, 2158 flow [2024-06-28 00:27:31,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2158, PETRI_PLACES=137, PETRI_TRANSITIONS=140} [2024-06-28 00:27:31,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-28 00:27:31,849 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 140 transitions, 2158 flow [2024-06-28 00:27:31,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:31,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:31,850 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] [2024-06-28 00:27:31,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 00:27:31,850 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:31,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:31,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1601376104, now seen corresponding path program 5 times [2024-06-28 00:27:31,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:31,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794058414] [2024-06-28 00:27:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:31,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:31,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:31,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794058414] [2024-06-28 00:27:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794058414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:31,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:31,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:31,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001986460] [2024-06-28 00:27:31,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:31,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:31,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:31,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:31,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:31,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:31,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 140 transitions, 2158 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:31,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:31,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:31,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:32,351 INFO L124 PetriNetUnfolderBase]: 900/1571 cut-off events. [2024-06-28 00:27:32,352 INFO L125 PetriNetUnfolderBase]: For 21507/21512 co-relation queries the response was YES. [2024-06-28 00:27:32,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9623 conditions, 1571 events. 900/1571 cut-off events. For 21507/21512 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8741 event pairs, 188 based on Foata normal form. 5/1568 useless extension candidates. Maximal degree in co-relation 9555. Up to 1221 conditions per place. [2024-06-28 00:27:32,365 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 117 selfloop transitions, 47 changer transitions 0/172 dead transitions. [2024-06-28 00:27:32,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 172 transitions, 2660 flow [2024-06-28 00:27:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 00:27:32,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-28 00:27:32,367 INFO L175 Difference]: Start difference. First operand has 137 places, 140 transitions, 2158 flow. Second operand 7 states and 147 transitions. [2024-06-28 00:27:32,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 172 transitions, 2660 flow [2024-06-28 00:27:32,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 172 transitions, 2583 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:32,410 INFO L231 Difference]: Finished difference. Result has 141 places, 146 transitions, 2299 flow [2024-06-28 00:27:32,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2299, PETRI_PLACES=141, PETRI_TRANSITIONS=146} [2024-06-28 00:27:32,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-28 00:27:32,411 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 146 transitions, 2299 flow [2024-06-28 00:27:32,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:32,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:32,411 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] [2024-06-28 00:27:32,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 00:27:32,411 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:32,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1931041156, now seen corresponding path program 6 times [2024-06-28 00:27:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:32,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668786153] [2024-06-28 00:27:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:32,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668786153] [2024-06-28 00:27:32,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668786153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:32,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:32,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:32,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569681211] [2024-06-28 00:27:32,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:32,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:32,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:32,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:32,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 146 transitions, 2299 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:32,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:32,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:32,903 INFO L124 PetriNetUnfolderBase]: 1005/1741 cut-off events. [2024-06-28 00:27:32,903 INFO L125 PetriNetUnfolderBase]: For 27813/27818 co-relation queries the response was YES. [2024-06-28 00:27:32,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10912 conditions, 1741 events. 1005/1741 cut-off events. For 27813/27818 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9889 event pairs, 210 based on Foata normal form. 5/1738 useless extension candidates. Maximal degree in co-relation 10842. Up to 980 conditions per place. [2024-06-28 00:27:32,917 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 73 changer transitions 0/184 dead transitions. [2024-06-28 00:27:32,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 184 transitions, 3007 flow [2024-06-28 00:27:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:32,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-28 00:27:32,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-28 00:27:32,918 INFO L175 Difference]: Start difference. First operand has 141 places, 146 transitions, 2299 flow. Second operand 7 states and 151 transitions. [2024-06-28 00:27:32,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 184 transitions, 3007 flow [2024-06-28 00:27:32,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 184 transitions, 2872 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:32,969 INFO L231 Difference]: Finished difference. Result has 146 places, 154 transitions, 2513 flow [2024-06-28 00:27:32,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2513, PETRI_PLACES=146, PETRI_TRANSITIONS=154} [2024-06-28 00:27:32,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-28 00:27:32,970 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 154 transitions, 2513 flow [2024-06-28 00:27:32,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:32,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:32,970 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] [2024-06-28 00:27:32,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 00:27:32,971 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:32,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:32,971 INFO L85 PathProgramCache]: Analyzing trace with hash -673410622, now seen corresponding path program 7 times [2024-06-28 00:27:32,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:32,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80219226] [2024-06-28 00:27:32,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:32,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:33,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:33,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80219226] [2024-06-28 00:27:33,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80219226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:33,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:33,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:33,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202221] [2024-06-28 00:27:33,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:33,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:33,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:33,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:33,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:33,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 154 transitions, 2513 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:33,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:33,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:33,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:33,466 INFO L124 PetriNetUnfolderBase]: 1002/1739 cut-off events. [2024-06-28 00:27:33,467 INFO L125 PetriNetUnfolderBase]: For 29236/29241 co-relation queries the response was YES. [2024-06-28 00:27:33,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11053 conditions, 1739 events. 1002/1739 cut-off events. For 29236/29241 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9900 event pairs, 177 based on Foata normal form. 5/1740 useless extension candidates. Maximal degree in co-relation 10981. Up to 1106 conditions per place. [2024-06-28 00:27:33,482 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 101 selfloop transitions, 76 changer transitions 0/185 dead transitions. [2024-06-28 00:27:33,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 185 transitions, 3045 flow [2024-06-28 00:27:33,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:27:33,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-28 00:27:33,485 INFO L175 Difference]: Start difference. First operand has 146 places, 154 transitions, 2513 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:27:33,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 185 transitions, 3045 flow [2024-06-28 00:27:33,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 185 transitions, 2910 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:33,531 INFO L231 Difference]: Finished difference. Result has 151 places, 154 transitions, 2548 flow [2024-06-28 00:27:33,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2548, PETRI_PLACES=151, PETRI_TRANSITIONS=154} [2024-06-28 00:27:33,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-28 00:27:33,532 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 154 transitions, 2548 flow [2024-06-28 00:27:33,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:33,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:33,532 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] [2024-06-28 00:27:33,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 00:27:33,533 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:33,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:33,533 INFO L85 PathProgramCache]: Analyzing trace with hash -843905662, now seen corresponding path program 8 times [2024-06-28 00:27:33,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:33,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391335594] [2024-06-28 00:27:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:33,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:33,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391335594] [2024-06-28 00:27:33,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391335594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:33,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:33,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:33,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251175172] [2024-06-28 00:27:33,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:33,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:33,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:33,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:33,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 154 transitions, 2548 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:33,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:33,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:33,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:34,017 INFO L124 PetriNetUnfolderBase]: 994/1716 cut-off events. [2024-06-28 00:27:34,017 INFO L125 PetriNetUnfolderBase]: For 31073/31078 co-relation queries the response was YES. [2024-06-28 00:27:34,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11021 conditions, 1716 events. 994/1716 cut-off events. For 31073/31078 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9648 event pairs, 185 based on Foata normal form. 7/1715 useless extension candidates. Maximal degree in co-relation 10948. Up to 1103 conditions per place. [2024-06-28 00:27:34,029 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 112 selfloop transitions, 58 changer transitions 0/178 dead transitions. [2024-06-28 00:27:34,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 178 transitions, 3010 flow [2024-06-28 00:27:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-28 00:27:34,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-28 00:27:34,031 INFO L175 Difference]: Start difference. First operand has 151 places, 154 transitions, 2548 flow. Second operand 6 states and 129 transitions. [2024-06-28 00:27:34,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 178 transitions, 3010 flow [2024-06-28 00:27:34,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 178 transitions, 2852 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:27:34,082 INFO L231 Difference]: Finished difference. Result has 151 places, 154 transitions, 2523 flow [2024-06-28 00:27:34,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2523, PETRI_PLACES=151, PETRI_TRANSITIONS=154} [2024-06-28 00:27:34,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-28 00:27:34,083 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 154 transitions, 2523 flow [2024-06-28 00:27:34,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:34,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:34,084 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] [2024-06-28 00:27:34,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 00:27:34,084 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:34,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash -467293792, now seen corresponding path program 9 times [2024-06-28 00:27:34,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:34,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224324051] [2024-06-28 00:27:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:34,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:34,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:34,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224324051] [2024-06-28 00:27:34,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224324051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:34,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:34,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:34,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827314753] [2024-06-28 00:27:34,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:34,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:34,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:34,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:34,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:34,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:34,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 154 transitions, 2523 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:34,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:34,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:34,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:34,501 INFO L124 PetriNetUnfolderBase]: 1007/1749 cut-off events. [2024-06-28 00:27:34,502 INFO L125 PetriNetUnfolderBase]: For 33512/33517 co-relation queries the response was YES. [2024-06-28 00:27:34,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11239 conditions, 1749 events. 1007/1749 cut-off events. For 33512/33517 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9919 event pairs, 172 based on Foata normal form. 7/1754 useless extension candidates. Maximal degree in co-relation 11165. Up to 982 conditions per place. [2024-06-28 00:27:34,517 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 62 changer transitions 0/184 dead transitions. [2024-06-28 00:27:34,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 184 transitions, 3103 flow [2024-06-28 00:27:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:27:34,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-28 00:27:34,518 INFO L175 Difference]: Start difference. First operand has 151 places, 154 transitions, 2523 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:27:34,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 184 transitions, 3103 flow [2024-06-28 00:27:34,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 184 transitions, 2947 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 00:27:34,569 INFO L231 Difference]: Finished difference. Result has 153 places, 157 transitions, 2569 flow [2024-06-28 00:27:34,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2569, PETRI_PLACES=153, PETRI_TRANSITIONS=157} [2024-06-28 00:27:34,569 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-28 00:27:34,569 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 157 transitions, 2569 flow [2024-06-28 00:27:34,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:34,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:34,570 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] [2024-06-28 00:27:34,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 00:27:34,570 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:34,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:34,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2097626476, now seen corresponding path program 10 times [2024-06-28 00:27:34,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:34,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226343714] [2024-06-28 00:27:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:34,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:34,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:34,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226343714] [2024-06-28 00:27:34,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226343714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:34,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:34,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:34,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698364072] [2024-06-28 00:27:34,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:34,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:34,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:34,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:34,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:34,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 157 transitions, 2569 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:34,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:34,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:34,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:35,029 INFO L124 PetriNetUnfolderBase]: 999/1738 cut-off events. [2024-06-28 00:27:35,029 INFO L125 PetriNetUnfolderBase]: For 28606/28611 co-relation queries the response was YES. [2024-06-28 00:27:35,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10816 conditions, 1738 events. 999/1738 cut-off events. For 28606/28611 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9902 event pairs, 171 based on Foata normal form. 7/1743 useless extension candidates. Maximal degree in co-relation 10741. Up to 979 conditions per place. [2024-06-28 00:27:35,042 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 126 selfloop transitions, 53 changer transitions 0/187 dead transitions. [2024-06-28 00:27:35,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 187 transitions, 3111 flow [2024-06-28 00:27:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-28 00:27:35,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-28 00:27:35,042 INFO L175 Difference]: Start difference. First operand has 153 places, 157 transitions, 2569 flow. Second operand 7 states and 147 transitions. [2024-06-28 00:27:35,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 187 transitions, 3111 flow [2024-06-28 00:27:35,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 187 transitions, 2947 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:35,092 INFO L231 Difference]: Finished difference. Result has 156 places, 157 transitions, 2517 flow [2024-06-28 00:27:35,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2405, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2517, PETRI_PLACES=156, PETRI_TRANSITIONS=157} [2024-06-28 00:27:35,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-28 00:27:35,092 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 157 transitions, 2517 flow [2024-06-28 00:27:35,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:35,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:35,093 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] [2024-06-28 00:27:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 00:27:35,093 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:35,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:35,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1446083690, now seen corresponding path program 1 times [2024-06-28 00:27:35,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:35,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131749967] [2024-06-28 00:27:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:35,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:35,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:35,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131749967] [2024-06-28 00:27:35,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131749967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:35,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:35,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:35,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197160261] [2024-06-28 00:27:35,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:35,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:35,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:35,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:35,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:35,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 157 transitions, 2517 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:35,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:35,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:35,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:35,891 INFO L124 PetriNetUnfolderBase]: 991/1710 cut-off events. [2024-06-28 00:27:35,891 INFO L125 PetriNetUnfolderBase]: For 29301/29301 co-relation queries the response was YES. [2024-06-28 00:27:35,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10589 conditions, 1710 events. 991/1710 cut-off events. For 29301/29301 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9616 event pairs, 122 based on Foata normal form. 4/1708 useless extension candidates. Maximal degree in co-relation 10513. Up to 1135 conditions per place. [2024-06-28 00:27:35,903 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 119 selfloop transitions, 46 changer transitions 0/173 dead transitions. [2024-06-28 00:27:35,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 173 transitions, 2883 flow [2024-06-28 00:27:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:27:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:27:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-28 00:27:35,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-28 00:27:35,904 INFO L175 Difference]: Start difference. First operand has 156 places, 157 transitions, 2517 flow. Second operand 5 states and 108 transitions. [2024-06-28 00:27:35,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 173 transitions, 2883 flow [2024-06-28 00:27:35,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 173 transitions, 2731 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 00:27:35,953 INFO L231 Difference]: Finished difference. Result has 155 places, 157 transitions, 2475 flow [2024-06-28 00:27:35,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2475, PETRI_PLACES=155, PETRI_TRANSITIONS=157} [2024-06-28 00:27:35,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-28 00:27:35,953 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 157 transitions, 2475 flow [2024-06-28 00:27:35,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:35,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:35,954 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] [2024-06-28 00:27:35,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 00:27:35,954 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:35,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1157150693, now seen corresponding path program 1 times [2024-06-28 00:27:35,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:35,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280260403] [2024-06-28 00:27:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:35,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:36,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:36,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280260403] [2024-06-28 00:27:36,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280260403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:36,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:36,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:36,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707380406] [2024-06-28 00:27:36,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:36,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:36,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:36,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:27:36,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 157 transitions, 2475 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:36,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:36,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:27:36,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:36,913 INFO L124 PetriNetUnfolderBase]: 1527/2676 cut-off events. [2024-06-28 00:27:36,914 INFO L125 PetriNetUnfolderBase]: For 46761/46766 co-relation queries the response was YES. [2024-06-28 00:27:36,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15474 conditions, 2676 events. 1527/2676 cut-off events. For 46761/46766 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 17390 event pairs, 192 based on Foata normal form. 12/2686 useless extension candidates. Maximal degree in co-relation 15397. Up to 1076 conditions per place. [2024-06-28 00:27:36,933 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 97 changer transitions 0/270 dead transitions. [2024-06-28 00:27:36,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 270 transitions, 4075 flow [2024-06-28 00:27:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 00:27:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 00:27:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 252 transitions. [2024-06-28 00:27:36,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727954971857411 [2024-06-28 00:27:36,935 INFO L175 Difference]: Start difference. First operand has 155 places, 157 transitions, 2475 flow. Second operand 13 states and 252 transitions. [2024-06-28 00:27:36,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 270 transitions, 4075 flow [2024-06-28 00:27:37,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 270 transitions, 3903 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 00:27:37,038 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 3145 flow [2024-06-28 00:27:37,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3145, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-28 00:27:37,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-28 00:27:37,038 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 3145 flow [2024-06-28 00:27:37,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:37,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:37,038 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] [2024-06-28 00:27:37,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 00:27:37,039 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:37,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1445993325, now seen corresponding path program 2 times [2024-06-28 00:27:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:37,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184901989] [2024-06-28 00:27:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:37,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:37,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:37,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184901989] [2024-06-28 00:27:37,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184901989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:37,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:37,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:37,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786535181] [2024-06-28 00:27:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:37,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:37,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:37,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 3145 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:37,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:37,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:37,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:37,962 INFO L124 PetriNetUnfolderBase]: 1615/2838 cut-off events. [2024-06-28 00:27:37,962 INFO L125 PetriNetUnfolderBase]: For 51994/51997 co-relation queries the response was YES. [2024-06-28 00:27:37,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17238 conditions, 2838 events. 1615/2838 cut-off events. For 51994/51997 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 18741 event pairs, 258 based on Foata normal form. 12/2842 useless extension candidates. Maximal degree in co-relation 17156. Up to 952 conditions per place. [2024-06-28 00:27:37,984 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 133 selfloop transitions, 91 changer transitions 0/232 dead transitions. [2024-06-28 00:27:37,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 232 transitions, 3873 flow [2024-06-28 00:27:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-28 00:27:37,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-28 00:27:37,987 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 3145 flow. Second operand 8 states and 169 transitions. [2024-06-28 00:27:37,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 232 transitions, 3873 flow [2024-06-28 00:27:38,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 232 transitions, 3814 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:38,119 INFO L231 Difference]: Finished difference. Result has 175 places, 193 transitions, 3320 flow [2024-06-28 00:27:38,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3086, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3320, PETRI_PLACES=175, PETRI_TRANSITIONS=193} [2024-06-28 00:27:38,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-28 00:27:38,120 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 193 transitions, 3320 flow [2024-06-28 00:27:38,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:38,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:38,120 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] [2024-06-28 00:27:38,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 00:27:38,120 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:38,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:38,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1494866499, now seen corresponding path program 3 times [2024-06-28 00:27:38,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:38,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800901554] [2024-06-28 00:27:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:38,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:38,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:38,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800901554] [2024-06-28 00:27:38,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800901554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:38,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:38,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:38,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987744011] [2024-06-28 00:27:38,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:38,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:38,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:38,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:38,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:38,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 193 transitions, 3320 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:38,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:38,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:38,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:38,941 INFO L124 PetriNetUnfolderBase]: 1795/3146 cut-off events. [2024-06-28 00:27:38,941 INFO L125 PetriNetUnfolderBase]: For 64299/64302 co-relation queries the response was YES. [2024-06-28 00:27:38,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19827 conditions, 3146 events. 1795/3146 cut-off events. For 64299/64302 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 21275 event pairs, 270 based on Foata normal form. 6/3138 useless extension candidates. Maximal degree in co-relation 19744. Up to 1437 conditions per place. [2024-06-28 00:27:38,966 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 137 selfloop transitions, 86 changer transitions 0/231 dead transitions. [2024-06-28 00:27:38,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 231 transitions, 4059 flow [2024-06-28 00:27:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-28 00:27:38,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-28 00:27:38,967 INFO L175 Difference]: Start difference. First operand has 175 places, 193 transitions, 3320 flow. Second operand 7 states and 153 transitions. [2024-06-28 00:27:38,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 231 transitions, 4059 flow [2024-06-28 00:27:39,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 231 transitions, 3991 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:39,152 INFO L231 Difference]: Finished difference. Result has 180 places, 199 transitions, 3598 flow [2024-06-28 00:27:39,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3598, PETRI_PLACES=180, PETRI_TRANSITIONS=199} [2024-06-28 00:27:39,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-28 00:27:39,153 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 199 transitions, 3598 flow [2024-06-28 00:27:39,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:39,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:39,153 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] [2024-06-28 00:27:39,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 00:27:39,153 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:39,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:39,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1494659109, now seen corresponding path program 4 times [2024-06-28 00:27:39,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:39,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006087827] [2024-06-28 00:27:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:39,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:39,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:39,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006087827] [2024-06-28 00:27:39,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006087827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:39,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:39,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:39,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589405250] [2024-06-28 00:27:39,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:39,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:39,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:39,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:39,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:39,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:39,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 199 transitions, 3598 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:39,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:39,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:39,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:39,970 INFO L124 PetriNetUnfolderBase]: 1756/3099 cut-off events. [2024-06-28 00:27:39,971 INFO L125 PetriNetUnfolderBase]: For 67119/67122 co-relation queries the response was YES. [2024-06-28 00:27:39,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20138 conditions, 3099 events. 1756/3099 cut-off events. For 67119/67122 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 20920 event pairs, 245 based on Foata normal form. 18/3103 useless extension candidates. Maximal degree in co-relation 20052. Up to 1437 conditions per place. [2024-06-28 00:27:39,995 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 73 changer transitions 0/226 dead transitions. [2024-06-28 00:27:39,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 226 transitions, 4175 flow [2024-06-28 00:27:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:39,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-28 00:27:39,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087108013937283 [2024-06-28 00:27:39,996 INFO L175 Difference]: Start difference. First operand has 180 places, 199 transitions, 3598 flow. Second operand 7 states and 146 transitions. [2024-06-28 00:27:39,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 226 transitions, 4175 flow [2024-06-28 00:27:40,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 226 transitions, 4062 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:40,211 INFO L231 Difference]: Finished difference. Result has 184 places, 200 transitions, 3710 flow [2024-06-28 00:27:40,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3710, PETRI_PLACES=184, PETRI_TRANSITIONS=200} [2024-06-28 00:27:40,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-28 00:27:40,211 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 200 transitions, 3710 flow [2024-06-28 00:27:40,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:40,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:40,212 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] [2024-06-28 00:27:40,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 00:27:40,212 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:40,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:40,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2128032945, now seen corresponding path program 5 times [2024-06-28 00:27:40,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:40,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405244197] [2024-06-28 00:27:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:40,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:40,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:40,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405244197] [2024-06-28 00:27:40,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405244197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:40,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:40,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:40,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948174616] [2024-06-28 00:27:40,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:40,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:40,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:40,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:40,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:40,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:40,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 200 transitions, 3710 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:40,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:40,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:40,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:41,233 INFO L124 PetriNetUnfolderBase]: 1857/3298 cut-off events. [2024-06-28 00:27:41,233 INFO L125 PetriNetUnfolderBase]: For 77748/77751 co-relation queries the response was YES. [2024-06-28 00:27:41,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21663 conditions, 3298 events. 1857/3298 cut-off events. For 77748/77751 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 22969 event pairs, 391 based on Foata normal form. 6/3275 useless extension candidates. Maximal degree in co-relation 21576. Up to 1224 conditions per place. [2024-06-28 00:27:41,258 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 123 selfloop transitions, 111 changer transitions 0/242 dead transitions. [2024-06-28 00:27:41,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 242 transitions, 4544 flow [2024-06-28 00:27:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 00:27:41,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 00:27:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-28 00:27:41,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742547425474255 [2024-06-28 00:27:41,259 INFO L175 Difference]: Start difference. First operand has 184 places, 200 transitions, 3710 flow. Second operand 9 states and 175 transitions. [2024-06-28 00:27:41,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 242 transitions, 4544 flow [2024-06-28 00:27:41,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 242 transitions, 4450 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:41,417 INFO L231 Difference]: Finished difference. Result has 190 places, 205 transitions, 3991 flow [2024-06-28 00:27:41,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3991, PETRI_PLACES=190, PETRI_TRANSITIONS=205} [2024-06-28 00:27:41,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-28 00:27:41,418 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 205 transitions, 3991 flow [2024-06-28 00:27:41,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:41,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:41,418 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] [2024-06-28 00:27:41,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 00:27:41,418 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:41,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:41,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1266459423, now seen corresponding path program 1 times [2024-06-28 00:27:41,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:41,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519888231] [2024-06-28 00:27:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:41,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:41,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:41,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519888231] [2024-06-28 00:27:41,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519888231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:41,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:41,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:41,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953039915] [2024-06-28 00:27:41,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:41,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:41,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:41,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:27:41,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 205 transitions, 3991 flow. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:41,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:41,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:27:41,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:42,504 INFO L124 PetriNetUnfolderBase]: 1826/3283 cut-off events. [2024-06-28 00:27:42,505 INFO L125 PetriNetUnfolderBase]: For 77482/77487 co-relation queries the response was YES. [2024-06-28 00:27:42,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21813 conditions, 3283 events. 1826/3283 cut-off events. For 77482/77487 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 22998 event pairs, 677 based on Foata normal form. 18/3279 useless extension candidates. Maximal degree in co-relation 21724. Up to 2260 conditions per place. [2024-06-28 00:27:42,540 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 147 selfloop transitions, 81 changer transitions 0/235 dead transitions. [2024-06-28 00:27:42,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 235 transitions, 4624 flow [2024-06-28 00:27:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:42,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:27:42,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-28 00:27:42,543 INFO L175 Difference]: Start difference. First operand has 190 places, 205 transitions, 3991 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:27:42,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 235 transitions, 4624 flow [2024-06-28 00:27:42,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 235 transitions, 4484 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:42,752 INFO L231 Difference]: Finished difference. Result has 194 places, 205 transitions, 4031 flow [2024-06-28 00:27:42,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4031, PETRI_PLACES=194, PETRI_TRANSITIONS=205} [2024-06-28 00:27:42,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-28 00:27:42,753 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 205 transitions, 4031 flow [2024-06-28 00:27:42,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:42,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:42,753 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] [2024-06-28 00:27:42,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 00:27:42,753 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:42,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2136375045, now seen corresponding path program 6 times [2024-06-28 00:27:42,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:42,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420499023] [2024-06-28 00:27:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:42,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:43,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:43,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420499023] [2024-06-28 00:27:43,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420499023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:43,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:43,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:43,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072074687] [2024-06-28 00:27:43,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:43,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:43,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:43,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:43,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 205 transitions, 4031 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:43,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:43,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:43,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:43,749 INFO L124 PetriNetUnfolderBase]: 1854/3299 cut-off events. [2024-06-28 00:27:43,749 INFO L125 PetriNetUnfolderBase]: For 81185/81188 co-relation queries the response was YES. [2024-06-28 00:27:43,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22153 conditions, 3299 events. 1854/3299 cut-off events. For 81185/81188 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23058 event pairs, 384 based on Foata normal form. 2/3271 useless extension candidates. Maximal degree in co-relation 22064. Up to 1461 conditions per place. [2024-06-28 00:27:43,779 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 122 selfloop transitions, 108 changer transitions 0/238 dead transitions. [2024-06-28 00:27:43,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 238 transitions, 4784 flow [2024-06-28 00:27:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:43,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-28 00:27:43,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-28 00:27:43,780 INFO L175 Difference]: Start difference. First operand has 194 places, 205 transitions, 4031 flow. Second operand 8 states and 155 transitions. [2024-06-28 00:27:43,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 238 transitions, 4784 flow [2024-06-28 00:27:44,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 238 transitions, 4645 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 00:27:44,064 INFO L231 Difference]: Finished difference. Result has 197 places, 214 transitions, 4300 flow [2024-06-28 00:27:44,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4300, PETRI_PLACES=197, PETRI_TRANSITIONS=214} [2024-06-28 00:27:44,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-28 00:27:44,064 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 214 transitions, 4300 flow [2024-06-28 00:27:44,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:44,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:44,065 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] [2024-06-28 00:27:44,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 00:27:44,065 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:44,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1873758363, now seen corresponding path program 2 times [2024-06-28 00:27:44,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:44,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300428594] [2024-06-28 00:27:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:44,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:44,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300428594] [2024-06-28 00:27:44,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300428594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:44,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:44,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:44,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001054427] [2024-06-28 00:27:44,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:44,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:44,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:44,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:44,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:44,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:44,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 214 transitions, 4300 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:44,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:44,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:44,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:44,956 INFO L124 PetriNetUnfolderBase]: 1734/3149 cut-off events. [2024-06-28 00:27:44,956 INFO L125 PetriNetUnfolderBase]: For 77399/77402 co-relation queries the response was YES. [2024-06-28 00:27:44,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20288 conditions, 3149 events. 1734/3149 cut-off events. For 77399/77402 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21936 event pairs, 204 based on Foata normal form. 64/3191 useless extension candidates. Maximal degree in co-relation 20198. Up to 1587 conditions per place. [2024-06-28 00:27:44,983 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 137 selfloop transitions, 74 changer transitions 27/246 dead transitions. [2024-06-28 00:27:44,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 246 transitions, 4874 flow [2024-06-28 00:27:44,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:27:44,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-28 00:27:44,984 INFO L175 Difference]: Start difference. First operand has 197 places, 214 transitions, 4300 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:27:44,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 246 transitions, 4874 flow [2024-06-28 00:27:45,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 246 transitions, 4733 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-28 00:27:45,199 INFO L231 Difference]: Finished difference. Result has 203 places, 190 transitions, 3913 flow [2024-06-28 00:27:45,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3913, PETRI_PLACES=203, PETRI_TRANSITIONS=190} [2024-06-28 00:27:45,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-28 00:27:45,200 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 190 transitions, 3913 flow [2024-06-28 00:27:45,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:45,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:45,200 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] [2024-06-28 00:27:45,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 00:27:45,200 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:45,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1492313097, now seen corresponding path program 7 times [2024-06-28 00:27:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:45,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552084115] [2024-06-28 00:27:45,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:45,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:45,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:45,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552084115] [2024-06-28 00:27:45,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552084115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:45,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:45,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:45,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836281252] [2024-06-28 00:27:45,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:45,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:45,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:45,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:45,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:45,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:45,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 190 transitions, 3913 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:45,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:45,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:45,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:45,924 INFO L124 PetriNetUnfolderBase]: 1349/2443 cut-off events. [2024-06-28 00:27:45,925 INFO L125 PetriNetUnfolderBase]: For 60332/60356 co-relation queries the response was YES. [2024-06-28 00:27:45,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16619 conditions, 2443 events. 1349/2443 cut-off events. For 60332/60356 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15908 event pairs, 406 based on Foata normal form. 10/2427 useless extension candidates. Maximal degree in co-relation 16527. Up to 940 conditions per place. [2024-06-28 00:27:45,945 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 147 selfloop transitions, 48 changer transitions 0/203 dead transitions. [2024-06-28 00:27:45,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 203 transitions, 4381 flow [2024-06-28 00:27:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-28 00:27:45,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-28 00:27:45,946 INFO L175 Difference]: Start difference. First operand has 203 places, 190 transitions, 3913 flow. Second operand 6 states and 116 transitions. [2024-06-28 00:27:45,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 203 transitions, 4381 flow [2024-06-28 00:27:46,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 203 transitions, 3956 flow, removed 14 selfloop flow, removed 17 redundant places. [2024-06-28 00:27:46,062 INFO L231 Difference]: Finished difference. Result has 191 places, 190 transitions, 3592 flow [2024-06-28 00:27:46,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3592, PETRI_PLACES=191, PETRI_TRANSITIONS=190} [2024-06-28 00:27:46,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-28 00:27:46,062 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 190 transitions, 3592 flow [2024-06-28 00:27:46,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:46,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:46,063 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] [2024-06-28 00:27:46,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 00:27:46,063 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:46,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:46,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1542899175, now seen corresponding path program 3 times [2024-06-28 00:27:46,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:46,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813224152] [2024-06-28 00:27:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:46,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:46,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813224152] [2024-06-28 00:27:46,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813224152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:46,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:46,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679348939] [2024-06-28 00:27:46,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:46,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:46,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:46,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:27:46,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 190 transitions, 3592 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:46,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:46,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:27:46,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:47,293 INFO L124 PetriNetUnfolderBase]: 1448/2595 cut-off events. [2024-06-28 00:27:47,293 INFO L125 PetriNetUnfolderBase]: For 56541/56545 co-relation queries the response was YES. [2024-06-28 00:27:47,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16830 conditions, 2595 events. 1448/2595 cut-off events. For 56541/56545 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17168 event pairs, 517 based on Foata normal form. 11/2584 useless extension candidates. Maximal degree in co-relation 16740. Up to 1378 conditions per place. [2024-06-28 00:27:47,313 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 122 selfloop transitions, 112 changer transitions 0/241 dead transitions. [2024-06-28 00:27:47,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 241 transitions, 4547 flow [2024-06-28 00:27:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:27:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:27:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-28 00:27:47,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-28 00:27:47,315 INFO L175 Difference]: Start difference. First operand has 191 places, 190 transitions, 3592 flow. Second operand 11 states and 199 transitions. [2024-06-28 00:27:47,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 241 transitions, 4547 flow [2024-06-28 00:27:47,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 241 transitions, 4387 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 00:27:47,450 INFO L231 Difference]: Finished difference. Result has 200 places, 205 transitions, 3972 flow [2024-06-28 00:27:47,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3972, PETRI_PLACES=200, PETRI_TRANSITIONS=205} [2024-06-28 00:27:47,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-28 00:27:47,450 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 205 transitions, 3972 flow [2024-06-28 00:27:47,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:47,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:47,451 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] [2024-06-28 00:27:47,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 00:27:47,451 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:47,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:47,451 INFO L85 PathProgramCache]: Analyzing trace with hash -252204777, now seen corresponding path program 4 times [2024-06-28 00:27:47,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:47,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11317334] [2024-06-28 00:27:47,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:47,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:47,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:47,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11317334] [2024-06-28 00:27:47,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11317334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:47,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:47,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:47,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999943397] [2024-06-28 00:27:47,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:47,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:47,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:47,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:47,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-28 00:27:47,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 205 transitions, 3972 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:47,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:47,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-28 00:27:47,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:48,472 INFO L124 PetriNetUnfolderBase]: 1499/2723 cut-off events. [2024-06-28 00:27:48,472 INFO L125 PetriNetUnfolderBase]: For 60372/60376 co-relation queries the response was YES. [2024-06-28 00:27:48,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17910 conditions, 2723 events. 1499/2723 cut-off events. For 60372/60376 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18448 event pairs, 449 based on Foata normal form. 5/2687 useless extension candidates. Maximal degree in co-relation 17815. Up to 1404 conditions per place. [2024-06-28 00:27:48,496 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 138 selfloop transitions, 104 changer transitions 0/249 dead transitions. [2024-06-28 00:27:48,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 249 transitions, 4989 flow [2024-06-28 00:27:48,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 00:27:48,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 00:27:48,498 INFO L175 Difference]: Start difference. First operand has 200 places, 205 transitions, 3972 flow. Second operand 8 states and 152 transitions. [2024-06-28 00:27:48,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 249 transitions, 4989 flow [2024-06-28 00:27:48,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 249 transitions, 4840 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-28 00:27:48,656 INFO L231 Difference]: Finished difference. Result has 207 places, 221 transitions, 4413 flow [2024-06-28 00:27:48,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4413, PETRI_PLACES=207, PETRI_TRANSITIONS=221} [2024-06-28 00:27:48,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-28 00:27:48,657 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 221 transitions, 4413 flow [2024-06-28 00:27:48,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:48,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:48,657 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] [2024-06-28 00:27:48,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 00:27:48,657 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:48,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:48,658 INFO L85 PathProgramCache]: Analyzing trace with hash 876185285, now seen corresponding path program 8 times [2024-06-28 00:27:48,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:48,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813036640] [2024-06-28 00:27:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:48,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:48,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813036640] [2024-06-28 00:27:48,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813036640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:48,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:48,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:27:48,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486530379] [2024-06-28 00:27:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:48,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:27:48,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:27:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:27:48,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:48,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 221 transitions, 4413 flow. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:48,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:48,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:48,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:49,443 INFO L124 PetriNetUnfolderBase]: 1571/2897 cut-off events. [2024-06-28 00:27:49,443 INFO L125 PetriNetUnfolderBase]: For 75593/75619 co-relation queries the response was YES. [2024-06-28 00:27:49,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19059 conditions, 2897 events. 1571/2897 cut-off events. For 75593/75619 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 19964 event pairs, 410 based on Foata normal form. 22/2900 useless extension candidates. Maximal degree in co-relation 18961. Up to 1149 conditions per place. [2024-06-28 00:27:49,468 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 175 selfloop transitions, 51 changer transitions 2/236 dead transitions. [2024-06-28 00:27:49,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 236 transitions, 4995 flow [2024-06-28 00:27:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 00:27:49,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 00:27:49,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-28 00:27:49,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-28 00:27:49,469 INFO L175 Difference]: Start difference. First operand has 207 places, 221 transitions, 4413 flow. Second operand 6 states and 112 transitions. [2024-06-28 00:27:49,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 236 transitions, 4995 flow [2024-06-28 00:27:49,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 236 transitions, 4796 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:49,639 INFO L231 Difference]: Finished difference. Result has 209 places, 222 transitions, 4350 flow [2024-06-28 00:27:49,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4350, PETRI_PLACES=209, PETRI_TRANSITIONS=222} [2024-06-28 00:27:49,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-28 00:27:49,640 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 222 transitions, 4350 flow [2024-06-28 00:27:49,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:49,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:49,640 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] [2024-06-28 00:27:49,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 00:27:49,640 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:49,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:49,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1487413227, now seen corresponding path program 5 times [2024-06-28 00:27:49,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:49,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6820220] [2024-06-28 00:27:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:49,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:49,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:49,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6820220] [2024-06-28 00:27:49,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6820220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:49,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:49,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:49,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78745826] [2024-06-28 00:27:49,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:49,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:49,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:49,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:49,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:49,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:49,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 222 transitions, 4350 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:49,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:49,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:49,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:50,424 INFO L124 PetriNetUnfolderBase]: 1550/2879 cut-off events. [2024-06-28 00:27:50,424 INFO L125 PetriNetUnfolderBase]: For 63999/64003 co-relation queries the response was YES. [2024-06-28 00:27:50,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18776 conditions, 2879 events. 1550/2879 cut-off events. For 63999/64003 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20027 event pairs, 476 based on Foata normal form. 5/2862 useless extension candidates. Maximal degree in co-relation 18678. Up to 2315 conditions per place. [2024-06-28 00:27:50,451 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 195 selfloop transitions, 43 changer transitions 0/246 dead transitions. [2024-06-28 00:27:50,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 246 transitions, 4903 flow [2024-06-28 00:27:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-28 00:27:50,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49825783972125437 [2024-06-28 00:27:50,455 INFO L175 Difference]: Start difference. First operand has 209 places, 222 transitions, 4350 flow. Second operand 7 states and 143 transitions. [2024-06-28 00:27:50,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 246 transitions, 4903 flow [2024-06-28 00:27:50,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 246 transitions, 4746 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:50,621 INFO L231 Difference]: Finished difference. Result has 212 places, 223 transitions, 4306 flow [2024-06-28 00:27:50,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4306, PETRI_PLACES=212, PETRI_TRANSITIONS=223} [2024-06-28 00:27:50,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-28 00:27:50,622 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 223 transitions, 4306 flow [2024-06-28 00:27:50,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:50,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:50,622 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] [2024-06-28 00:27:50,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 00:27:50,622 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:50,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:50,623 INFO L85 PathProgramCache]: Analyzing trace with hash 798410833, now seen corresponding path program 1 times [2024-06-28 00:27:50,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:50,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002062467] [2024-06-28 00:27:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:50,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:50,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:50,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002062467] [2024-06-28 00:27:50,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002062467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:50,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:50,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522415710] [2024-06-28 00:27:50,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:50,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:50,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:50,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:50,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 223 transitions, 4306 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:50,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:50,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:50,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:51,454 INFO L124 PetriNetUnfolderBase]: 1553/2888 cut-off events. [2024-06-28 00:27:51,454 INFO L125 PetriNetUnfolderBase]: For 65709/65712 co-relation queries the response was YES. [2024-06-28 00:27:51,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18318 conditions, 2888 events. 1553/2888 cut-off events. For 65709/65712 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20137 event pairs, 275 based on Foata normal form. 2/2864 useless extension candidates. Maximal degree in co-relation 18220. Up to 2072 conditions per place. [2024-06-28 00:27:51,480 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 190 selfloop transitions, 57 changer transitions 0/255 dead transitions. [2024-06-28 00:27:51,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 255 transitions, 4927 flow [2024-06-28 00:27:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 00:27:51,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4969512195121951 [2024-06-28 00:27:51,482 INFO L175 Difference]: Start difference. First operand has 212 places, 223 transitions, 4306 flow. Second operand 8 states and 163 transitions. [2024-06-28 00:27:51,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 255 transitions, 4927 flow [2024-06-28 00:27:51,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 255 transitions, 4769 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-28 00:27:51,677 INFO L231 Difference]: Finished difference. Result has 216 places, 225 transitions, 4317 flow [2024-06-28 00:27:51,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4317, PETRI_PLACES=216, PETRI_TRANSITIONS=225} [2024-06-28 00:27:51,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-28 00:27:51,678 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 225 transitions, 4317 flow [2024-06-28 00:27:51,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:51,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:51,678 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] [2024-06-28 00:27:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 00:27:51,678 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:51,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:51,678 INFO L85 PathProgramCache]: Analyzing trace with hash 230812547, now seen corresponding path program 6 times [2024-06-28 00:27:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637398830] [2024-06-28 00:27:51,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:51,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:51,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:51,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637398830] [2024-06-28 00:27:51,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637398830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:51,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:51,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:51,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482870579] [2024-06-28 00:27:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:51,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:51,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:51,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 225 transitions, 4317 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:51,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:51,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:51,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:52,440 INFO L124 PetriNetUnfolderBase]: 1573/2932 cut-off events. [2024-06-28 00:27:52,440 INFO L125 PetriNetUnfolderBase]: For 69755/69759 co-relation queries the response was YES. [2024-06-28 00:27:52,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18488 conditions, 2932 events. 1573/2932 cut-off events. For 69755/69759 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20556 event pairs, 412 based on Foata normal form. 9/2925 useless extension candidates. Maximal degree in co-relation 18390. Up to 1873 conditions per place. [2024-06-28 00:27:52,465 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 178 selfloop transitions, 67 changer transitions 0/253 dead transitions. [2024-06-28 00:27:52,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 253 transitions, 5051 flow [2024-06-28 00:27:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-28 00:27:52,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-28 00:27:52,466 INFO L175 Difference]: Start difference. First operand has 216 places, 225 transitions, 4317 flow. Second operand 7 states and 148 transitions. [2024-06-28 00:27:52,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 253 transitions, 5051 flow [2024-06-28 00:27:52,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 253 transitions, 4921 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 00:27:52,637 INFO L231 Difference]: Finished difference. Result has 217 places, 227 transitions, 4366 flow [2024-06-28 00:27:52,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4187, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4366, PETRI_PLACES=217, PETRI_TRANSITIONS=227} [2024-06-28 00:27:52,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-28 00:27:52,638 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 227 transitions, 4366 flow [2024-06-28 00:27:52,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:52,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:52,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:27:52,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 00:27:52,638 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:52,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1778335339, now seen corresponding path program 2 times [2024-06-28 00:27:52,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:52,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990104418] [2024-06-28 00:27:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:52,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:52,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:52,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990104418] [2024-06-28 00:27:52,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990104418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:52,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:52,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:52,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150368965] [2024-06-28 00:27:52,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:52,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:52,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:52,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:52,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:52,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:52,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 227 transitions, 4366 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:52,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:52,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:52,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:53,490 INFO L124 PetriNetUnfolderBase]: 1640/3065 cut-off events. [2024-06-28 00:27:53,490 INFO L125 PetriNetUnfolderBase]: For 83580/83583 co-relation queries the response was YES. [2024-06-28 00:27:53,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19095 conditions, 3065 events. 1640/3065 cut-off events. For 83580/83583 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 21719 event pairs, 215 based on Foata normal form. 28/3073 useless extension candidates. Maximal degree in co-relation 18996. Up to 1562 conditions per place. [2024-06-28 00:27:53,516 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 79 changer transitions 14/270 dead transitions. [2024-06-28 00:27:53,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 270 transitions, 5259 flow [2024-06-28 00:27:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 00:27:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 00:27:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-28 00:27:53,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-28 00:27:53,517 INFO L175 Difference]: Start difference. First operand has 217 places, 227 transitions, 4366 flow. Second operand 10 states and 195 transitions. [2024-06-28 00:27:53,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 270 transitions, 5259 flow [2024-06-28 00:27:53,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 270 transitions, 5120 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-28 00:27:53,711 INFO L231 Difference]: Finished difference. Result has 223 places, 224 transitions, 4383 flow [2024-06-28 00:27:53,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4233, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4383, PETRI_PLACES=223, PETRI_TRANSITIONS=224} [2024-06-28 00:27:53,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-28 00:27:53,712 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 224 transitions, 4383 flow [2024-06-28 00:27:53,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:53,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:53,712 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] [2024-06-28 00:27:53,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 00:27:53,712 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:53,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1475443941, now seen corresponding path program 3 times [2024-06-28 00:27:53,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:53,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436003733] [2024-06-28 00:27:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:53,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:53,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:53,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436003733] [2024-06-28 00:27:53,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436003733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:53,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:53,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:53,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654319432] [2024-06-28 00:27:53,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:53,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:53,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:53,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:53,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:53,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 224 transitions, 4383 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:53,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:53,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:53,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:54,532 INFO L124 PetriNetUnfolderBase]: 1558/2907 cut-off events. [2024-06-28 00:27:54,532 INFO L125 PetriNetUnfolderBase]: For 77544/77547 co-relation queries the response was YES. [2024-06-28 00:27:54,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18734 conditions, 2907 events. 1558/2907 cut-off events. For 77544/77547 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20235 event pairs, 255 based on Foata normal form. 8/2897 useless extension candidates. Maximal degree in co-relation 18634. Up to 1570 conditions per place. [2024-06-28 00:27:54,557 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 154 selfloop transitions, 95 changer transitions 3/260 dead transitions. [2024-06-28 00:27:54,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 260 transitions, 5156 flow [2024-06-28 00:27:54,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 00:27:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 00:27:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 00:27:54,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-28 00:27:54,558 INFO L175 Difference]: Start difference. First operand has 223 places, 224 transitions, 4383 flow. Second operand 8 states and 166 transitions. [2024-06-28 00:27:54,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 260 transitions, 5156 flow [2024-06-28 00:27:54,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 260 transitions, 4887 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-28 00:27:54,795 INFO L231 Difference]: Finished difference. Result has 221 places, 226 transitions, 4358 flow [2024-06-28 00:27:54,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4358, PETRI_PLACES=221, PETRI_TRANSITIONS=226} [2024-06-28 00:27:54,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-28 00:27:54,795 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 226 transitions, 4358 flow [2024-06-28 00:27:54,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:54,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:54,795 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] [2024-06-28 00:27:54,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 00:27:54,796 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:54,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:54,796 INFO L85 PathProgramCache]: Analyzing trace with hash 408181217, now seen corresponding path program 7 times [2024-06-28 00:27:54,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:54,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893660196] [2024-06-28 00:27:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:54,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:55,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:55,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893660196] [2024-06-28 00:27:55,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893660196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:55,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:55,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:55,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285797931] [2024-06-28 00:27:55,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:55,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:55,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:55,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:55,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 226 transitions, 4358 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:55,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:55,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:55,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:55,664 INFO L124 PetriNetUnfolderBase]: 1654/3085 cut-off events. [2024-06-28 00:27:55,665 INFO L125 PetriNetUnfolderBase]: For 80380/80383 co-relation queries the response was YES. [2024-06-28 00:27:55,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19455 conditions, 3085 events. 1654/3085 cut-off events. For 80380/80383 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 21793 event pairs, 268 based on Foata normal form. 12/3073 useless extension candidates. Maximal degree in co-relation 19356. Up to 1606 conditions per place. [2024-06-28 00:27:55,694 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 168 selfloop transitions, 95 changer transitions 3/274 dead transitions. [2024-06-28 00:27:55,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 274 transitions, 5392 flow [2024-06-28 00:27:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:27:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:27:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-28 00:27:55,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458980044345898 [2024-06-28 00:27:55,695 INFO L175 Difference]: Start difference. First operand has 221 places, 226 transitions, 4358 flow. Second operand 11 states and 207 transitions. [2024-06-28 00:27:55,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 274 transitions, 5392 flow [2024-06-28 00:27:55,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 274 transitions, 5245 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-28 00:27:55,893 INFO L231 Difference]: Finished difference. Result has 228 places, 236 transitions, 4681 flow [2024-06-28 00:27:55,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4220, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4681, PETRI_PLACES=228, PETRI_TRANSITIONS=236} [2024-06-28 00:27:55,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-28 00:27:55,894 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 236 transitions, 4681 flow [2024-06-28 00:27:55,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:55,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:55,894 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] [2024-06-28 00:27:55,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 00:27:55,894 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:55,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:55,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1475206977, now seen corresponding path program 8 times [2024-06-28 00:27:55,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:55,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10911765] [2024-06-28 00:27:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:55,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:56,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:56,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10911765] [2024-06-28 00:27:56,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10911765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:56,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:56,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:56,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334621376] [2024-06-28 00:27:56,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:56,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:56,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:56,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:56,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 236 transitions, 4681 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:56,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:56,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:56,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:56,839 INFO L124 PetriNetUnfolderBase]: 1717/3208 cut-off events. [2024-06-28 00:27:56,839 INFO L125 PetriNetUnfolderBase]: For 86703/86706 co-relation queries the response was YES. [2024-06-28 00:27:56,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20471 conditions, 3208 events. 1717/3208 cut-off events. For 86703/86706 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22926 event pairs, 261 based on Foata normal form. 8/3198 useless extension candidates. Maximal degree in co-relation 20370. Up to 1636 conditions per place. [2024-06-28 00:27:56,866 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 154 selfloop transitions, 119 changer transitions 3/284 dead transitions. [2024-06-28 00:27:56,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 284 transitions, 5697 flow [2024-06-28 00:27:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:27:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:27:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-28 00:27:56,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722838137472284 [2024-06-28 00:27:56,867 INFO L175 Difference]: Start difference. First operand has 228 places, 236 transitions, 4681 flow. Second operand 11 states and 213 transitions. [2024-06-28 00:27:56,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 284 transitions, 5697 flow [2024-06-28 00:27:57,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 284 transitions, 5465 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-28 00:27:57,064 INFO L231 Difference]: Finished difference. Result has 230 places, 241 transitions, 4850 flow [2024-06-28 00:27:57,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4850, PETRI_PLACES=230, PETRI_TRANSITIONS=241} [2024-06-28 00:27:57,064 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-28 00:27:57,064 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 241 transitions, 4850 flow [2024-06-28 00:27:57,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:57,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:57,064 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] [2024-06-28 00:27:57,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 00:27:57,065 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:57,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:57,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1479675627, now seen corresponding path program 9 times [2024-06-28 00:27:57,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:57,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768835761] [2024-06-28 00:27:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:57,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:57,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:57,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768835761] [2024-06-28 00:27:57,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768835761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:57,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:57,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:27:57,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688359599] [2024-06-28 00:27:57,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:57,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:27:57,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:57,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:27:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:27:57,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:57,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 241 transitions, 4850 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:57,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:57,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:57,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:57,931 INFO L124 PetriNetUnfolderBase]: 1672/3127 cut-off events. [2024-06-28 00:27:57,931 INFO L125 PetriNetUnfolderBase]: For 81917/81920 co-relation queries the response was YES. [2024-06-28 00:27:57,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19989 conditions, 3127 events. 1672/3127 cut-off events. For 81917/81920 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 22336 event pairs, 264 based on Foata normal form. 6/3109 useless extension candidates. Maximal degree in co-relation 19888. Up to 1614 conditions per place. [2024-06-28 00:27:57,963 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 145 selfloop transitions, 123 changer transitions 2/278 dead transitions. [2024-06-28 00:27:57,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 278 transitions, 5574 flow [2024-06-28 00:27:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 00:27:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 00:27:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-28 00:27:57,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-28 00:27:57,964 INFO L175 Difference]: Start difference. First operand has 230 places, 241 transitions, 4850 flow. Second operand 11 states and 209 transitions. [2024-06-28 00:27:57,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 278 transitions, 5574 flow [2024-06-28 00:27:58,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 278 transitions, 5356 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-28 00:27:58,182 INFO L231 Difference]: Finished difference. Result has 232 places, 239 transitions, 4875 flow [2024-06-28 00:27:58,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4875, PETRI_PLACES=232, PETRI_TRANSITIONS=239} [2024-06-28 00:27:58,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-28 00:27:58,182 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 239 transitions, 4875 flow [2024-06-28 00:27:58,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:58,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:58,183 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] [2024-06-28 00:27:58,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 00:27:58,183 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:58,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:58,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1551470324, now seen corresponding path program 1 times [2024-06-28 00:27:58,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:58,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669468958] [2024-06-28 00:27:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:58,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:58,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:58,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669468958] [2024-06-28 00:27:58,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669468958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:58,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:58,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:27:58,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231549257] [2024-06-28 00:27:58,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:58,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:27:58,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:27:58,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:27:58,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:58,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 239 transitions, 4875 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:58,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:58,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:58,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:27:59,318 INFO L124 PetriNetUnfolderBase]: 1604/3027 cut-off events. [2024-06-28 00:27:59,318 INFO L125 PetriNetUnfolderBase]: For 77470/77473 co-relation queries the response was YES. [2024-06-28 00:27:59,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18690 conditions, 3027 events. 1604/3027 cut-off events. For 77470/77473 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 21652 event pairs, 226 based on Foata normal form. 24/3034 useless extension candidates. Maximal degree in co-relation 18590. Up to 1417 conditions per place. [2024-06-28 00:27:59,343 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 154 selfloop transitions, 78 changer transitions 29/269 dead transitions. [2024-06-28 00:27:59,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 269 transitions, 5548 flow [2024-06-28 00:27:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:27:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:27:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-28 00:27:59,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017421602787456 [2024-06-28 00:27:59,344 INFO L175 Difference]: Start difference. First operand has 232 places, 239 transitions, 4875 flow. Second operand 7 states and 144 transitions. [2024-06-28 00:27:59,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 269 transitions, 5548 flow [2024-06-28 00:27:59,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 269 transitions, 5167 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-28 00:27:59,531 INFO L231 Difference]: Finished difference. Result has 228 places, 219 transitions, 4426 flow [2024-06-28 00:27:59,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4426, PETRI_PLACES=228, PETRI_TRANSITIONS=219} [2024-06-28 00:27:59,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-28 00:27:59,531 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 219 transitions, 4426 flow [2024-06-28 00:27:59,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:59,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:27:59,532 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] [2024-06-28 00:27:59,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 00:27:59,532 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:27:59,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:27:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1687848488, now seen corresponding path program 2 times [2024-06-28 00:27:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:27:59,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750056284] [2024-06-28 00:27:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:27:59,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:27:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:27:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:27:59,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:27:59,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750056284] [2024-06-28 00:27:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750056284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:27:59,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:27:59,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:27:59,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298972994] [2024-06-28 00:27:59,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:27:59,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:27:59,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:27:59,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:27:59,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:27:59,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:27:59,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 219 transitions, 4426 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:27:59,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:27:59,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:27:59,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:00,388 INFO L124 PetriNetUnfolderBase]: 1398/2639 cut-off events. [2024-06-28 00:28:00,388 INFO L125 PetriNetUnfolderBase]: For 70780/70780 co-relation queries the response was YES. [2024-06-28 00:28:00,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16913 conditions, 2639 events. 1398/2639 cut-off events. For 70780/70780 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 18595 event pairs, 158 based on Foata normal form. 12/2626 useless extension candidates. Maximal degree in co-relation 16812. Up to 750 conditions per place. [2024-06-28 00:28:00,407 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 127 selfloop transitions, 99 changer transitions 13/247 dead transitions. [2024-06-28 00:28:00,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 247 transitions, 5141 flow [2024-06-28 00:28:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-28 00:28:00,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-28 00:28:00,408 INFO L175 Difference]: Start difference. First operand has 228 places, 219 transitions, 4426 flow. Second operand 7 states and 141 transitions. [2024-06-28 00:28:00,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 247 transitions, 5141 flow [2024-06-28 00:28:00,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 247 transitions, 4597 flow, removed 15 selfloop flow, removed 24 redundant places. [2024-06-28 00:28:00,542 INFO L231 Difference]: Finished difference. Result has 210 places, 210 transitions, 3936 flow [2024-06-28 00:28:00,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3936, PETRI_PLACES=210, PETRI_TRANSITIONS=210} [2024-06-28 00:28:00,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-28 00:28:00,543 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 210 transitions, 3936 flow [2024-06-28 00:28:00,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:00,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:00,543 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] [2024-06-28 00:28:00,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 00:28:00,543 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:00,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:00,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1696190588, now seen corresponding path program 3 times [2024-06-28 00:28:00,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:00,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733784375] [2024-06-28 00:28:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:00,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:00,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733784375] [2024-06-28 00:28:00,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733784375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:00,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:00,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 00:28:00,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916136799] [2024-06-28 00:28:00,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:00,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 00:28:00,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:00,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 00:28:00,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 00:28:00,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:00,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 210 transitions, 3936 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:00,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:00,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:00,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:01,191 INFO L124 PetriNetUnfolderBase]: 1302/2508 cut-off events. [2024-06-28 00:28:01,191 INFO L125 PetriNetUnfolderBase]: For 62378/62389 co-relation queries the response was YES. [2024-06-28 00:28:01,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15095 conditions, 2508 events. 1302/2508 cut-off events. For 62378/62389 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 17770 event pairs, 268 based on Foata normal form. 16/2505 useless extension candidates. Maximal degree in co-relation 15006. Up to 897 conditions per place. [2024-06-28 00:28:01,213 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 132 selfloop transitions, 71 changer transitions 13/224 dead transitions. [2024-06-28 00:28:01,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 224 transitions, 4488 flow [2024-06-28 00:28:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:28:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:28:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-28 00:28:01,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-28 00:28:01,214 INFO L175 Difference]: Start difference. First operand has 210 places, 210 transitions, 3936 flow. Second operand 5 states and 100 transitions. [2024-06-28 00:28:01,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 224 transitions, 4488 flow [2024-06-28 00:28:01,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 224 transitions, 4282 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 00:28:01,325 INFO L231 Difference]: Finished difference. Result has 207 places, 199 transitions, 3738 flow [2024-06-28 00:28:01,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3736, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3738, PETRI_PLACES=207, PETRI_TRANSITIONS=199} [2024-06-28 00:28:01,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-28 00:28:01,325 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 199 transitions, 3738 flow [2024-06-28 00:28:01,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:01,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:01,326 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] [2024-06-28 00:28:01,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 00:28:01,326 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:01,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:01,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1677306470, now seen corresponding path program 4 times [2024-06-28 00:28:01,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:01,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265804648] [2024-06-28 00:28:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:01,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:01,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:01,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265804648] [2024-06-28 00:28:01,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265804648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:01,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:01,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:28:01,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109477414] [2024-06-28 00:28:01,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:01,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:28:01,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:28:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:28:01,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:01,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 199 transitions, 3738 flow. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:01,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:01,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:01,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:02,266 INFO L124 PetriNetUnfolderBase]: 1086/2175 cut-off events. [2024-06-28 00:28:02,267 INFO L125 PetriNetUnfolderBase]: For 45687/45687 co-relation queries the response was YES. [2024-06-28 00:28:02,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12796 conditions, 2175 events. 1086/2175 cut-off events. For 45687/45687 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 15428 event pairs, 176 based on Foata normal form. 12/2165 useless extension candidates. Maximal degree in co-relation 12709. Up to 534 conditions per place. [2024-06-28 00:28:02,285 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 121 selfloop transitions, 74 changer transitions 19/222 dead transitions. [2024-06-28 00:28:02,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 222 transitions, 4354 flow [2024-06-28 00:28:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-28 00:28:02,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-28 00:28:02,286 INFO L175 Difference]: Start difference. First operand has 207 places, 199 transitions, 3738 flow. Second operand 7 states and 139 transitions. [2024-06-28 00:28:02,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 222 transitions, 4354 flow [2024-06-28 00:28:02,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 222 transitions, 4140 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 00:28:02,393 INFO L231 Difference]: Finished difference. Result has 207 places, 185 transitions, 3491 flow [2024-06-28 00:28:02,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3491, PETRI_PLACES=207, PETRI_TRANSITIONS=185} [2024-06-28 00:28:02,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-28 00:28:02,393 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 185 transitions, 3491 flow [2024-06-28 00:28:02,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:02,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:02,393 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] [2024-06-28 00:28:02,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 00:28:02,394 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:02,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:02,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1803118800, now seen corresponding path program 1 times [2024-06-28 00:28:02,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:02,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153038809] [2024-06-28 00:28:02,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:02,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:02,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:02,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153038809] [2024-06-28 00:28:02,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153038809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:02,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:02,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:28:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625302679] [2024-06-28 00:28:02,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:02,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:28:02,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:28:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:28:02,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:02,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 185 transitions, 3491 flow. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:02,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:02,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:02,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:03,284 INFO L124 PetriNetUnfolderBase]: 956/1940 cut-off events. [2024-06-28 00:28:03,284 INFO L125 PetriNetUnfolderBase]: For 44351/44357 co-relation queries the response was YES. [2024-06-28 00:28:03,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11479 conditions, 1940 events. 956/1940 cut-off events. For 44351/44357 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 13525 event pairs, 192 based on Foata normal form. 12/1935 useless extension candidates. Maximal degree in co-relation 11394. Up to 589 conditions per place. [2024-06-28 00:28:03,299 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 105 selfloop transitions, 49 changer transitions 34/196 dead transitions. [2024-06-28 00:28:03,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 196 transitions, 3949 flow [2024-06-28 00:28:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:28:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:28:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-28 00:28:03,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-28 00:28:03,300 INFO L175 Difference]: Start difference. First operand has 207 places, 185 transitions, 3491 flow. Second operand 5 states and 98 transitions. [2024-06-28 00:28:03,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 196 transitions, 3949 flow [2024-06-28 00:28:03,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 196 transitions, 3693 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-28 00:28:03,393 INFO L231 Difference]: Finished difference. Result has 197 places, 151 transitions, 2707 flow [2024-06-28 00:28:03,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2707, PETRI_PLACES=197, PETRI_TRANSITIONS=151} [2024-06-28 00:28:03,394 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-28 00:28:03,394 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 151 transitions, 2707 flow [2024-06-28 00:28:03,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:03,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:03,394 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] [2024-06-28 00:28:03,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 00:28:03,394 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:03,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:03,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1963737170, now seen corresponding path program 5 times [2024-06-28 00:28:03,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:03,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235536754] [2024-06-28 00:28:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:03,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:03,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:03,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235536754] [2024-06-28 00:28:03,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235536754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:03,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:03,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 00:28:03,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147494986] [2024-06-28 00:28:03,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:03,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 00:28:03,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:03,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 00:28:03,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 00:28:03,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:03,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 151 transitions, 2707 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:03,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:03,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:03,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:04,061 INFO L124 PetriNetUnfolderBase]: 752/1556 cut-off events. [2024-06-28 00:28:04,061 INFO L125 PetriNetUnfolderBase]: For 36623/36623 co-relation queries the response was YES. [2024-06-28 00:28:04,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8965 conditions, 1556 events. 752/1556 cut-off events. For 36623/36623 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10480 event pairs, 172 based on Foata normal form. 12/1549 useless extension candidates. Maximal degree in co-relation 8884. Up to 534 conditions per place. [2024-06-28 00:28:04,071 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 98 selfloop transitions, 41 changer transitions 15/162 dead transitions. [2024-06-28 00:28:04,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 162 transitions, 3095 flow [2024-06-28 00:28:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:28:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:28:04,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-28 00:28:04,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47804878048780486 [2024-06-28 00:28:04,071 INFO L175 Difference]: Start difference. First operand has 197 places, 151 transitions, 2707 flow. Second operand 5 states and 98 transitions. [2024-06-28 00:28:04,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 162 transitions, 3095 flow [2024-06-28 00:28:04,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 162 transitions, 2900 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-28 00:28:04,135 INFO L231 Difference]: Finished difference. Result has 189 places, 136 transitions, 2282 flow [2024-06-28 00:28:04,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2282, PETRI_PLACES=189, PETRI_TRANSITIONS=136} [2024-06-28 00:28:04,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-28 00:28:04,135 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 136 transitions, 2282 flow [2024-06-28 00:28:04,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:04,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:04,135 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] [2024-06-28 00:28:04,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 00:28:04,136 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:04,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:04,137 INFO L85 PathProgramCache]: Analyzing trace with hash 996796540, now seen corresponding path program 1 times [2024-06-28 00:28:04,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:04,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423353538] [2024-06-28 00:28:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:04,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:04,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:04,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423353538] [2024-06-28 00:28:04,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423353538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:04,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:04,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:28:04,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724398382] [2024-06-28 00:28:04,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:04,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:28:04,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:28:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:28:04,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:04,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 136 transitions, 2282 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:04,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:04,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:04,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:04,920 INFO L124 PetriNetUnfolderBase]: 636/1313 cut-off events. [2024-06-28 00:28:04,920 INFO L125 PetriNetUnfolderBase]: For 27744/27744 co-relation queries the response was YES. [2024-06-28 00:28:04,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7486 conditions, 1313 events. 636/1313 cut-off events. For 27744/27744 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8458 event pairs, 130 based on Foata normal form. 4/1303 useless extension candidates. Maximal degree in co-relation 7409. Up to 487 conditions per place. [2024-06-28 00:28:04,929 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 92 selfloop transitions, 49 changer transitions 6/155 dead transitions. [2024-06-28 00:28:04,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 155 transitions, 2696 flow [2024-06-28 00:28:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 00:28:04,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-28 00:28:04,930 INFO L175 Difference]: Start difference. First operand has 189 places, 136 transitions, 2282 flow. Second operand 7 states and 134 transitions. [2024-06-28 00:28:04,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 155 transitions, 2696 flow [2024-06-28 00:28:04,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 155 transitions, 2531 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-28 00:28:04,981 INFO L231 Difference]: Finished difference. Result has 185 places, 130 transitions, 2159 flow [2024-06-28 00:28:04,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2159, PETRI_PLACES=185, PETRI_TRANSITIONS=130} [2024-06-28 00:28:04,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-28 00:28:04,981 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 130 transitions, 2159 flow [2024-06-28 00:28:04,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:04,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:04,982 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] [2024-06-28 00:28:04,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 00:28:04,982 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:04,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:04,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1145599488, now seen corresponding path program 2 times [2024-06-28 00:28:04,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:04,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021476363] [2024-06-28 00:28:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:04,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:05,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:05,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021476363] [2024-06-28 00:28:05,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021476363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:05,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:05,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:28:05,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239061845] [2024-06-28 00:28:05,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:05,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:28:05,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:05,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:28:05,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:28:05,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:05,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 130 transitions, 2159 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:05,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:05,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:05,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:06,077 INFO L124 PetriNetUnfolderBase]: 704/1479 cut-off events. [2024-06-28 00:28:06,077 INFO L125 PetriNetUnfolderBase]: For 38780/38780 co-relation queries the response was YES. [2024-06-28 00:28:06,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7951 conditions, 1479 events. 704/1479 cut-off events. For 38780/38780 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10052 event pairs, 188 based on Foata normal form. 16/1467 useless extension candidates. Maximal degree in co-relation 7877. Up to 627 conditions per place. [2024-06-28 00:28:06,087 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 85 selfloop transitions, 17 changer transitions 45/155 dead transitions. [2024-06-28 00:28:06,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 155 transitions, 2644 flow [2024-06-28 00:28:06,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:06,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 00:28:06,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-28 00:28:06,089 INFO L175 Difference]: Start difference. First operand has 185 places, 130 transitions, 2159 flow. Second operand 7 states and 131 transitions. [2024-06-28 00:28:06,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 155 transitions, 2644 flow [2024-06-28 00:28:06,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 155 transitions, 2436 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-28 00:28:06,158 INFO L231 Difference]: Finished difference. Result has 181 places, 96 transitions, 1434 flow [2024-06-28 00:28:06,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1434, PETRI_PLACES=181, PETRI_TRANSITIONS=96} [2024-06-28 00:28:06,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-28 00:28:06,158 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 96 transitions, 1434 flow [2024-06-28 00:28:06,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:06,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:06,159 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] [2024-06-28 00:28:06,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 00:28:06,159 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:06,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash 104600820, now seen corresponding path program 2 times [2024-06-28 00:28:06,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:06,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762545477] [2024-06-28 00:28:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:06,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:06,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762545477] [2024-06-28 00:28:06,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762545477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:06,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:06,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:28:06,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328732159] [2024-06-28 00:28:06,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:06,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:28:06,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:06,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:28:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:28:06,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:06,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 96 transitions, 1434 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:06,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:06,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:06,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:06,773 INFO L124 PetriNetUnfolderBase]: 488/1029 cut-off events. [2024-06-28 00:28:06,773 INFO L125 PetriNetUnfolderBase]: For 25984/25984 co-relation queries the response was YES. [2024-06-28 00:28:06,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5378 conditions, 1029 events. 488/1029 cut-off events. For 25984/25984 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6556 event pairs, 178 based on Foata normal form. 8/1015 useless extension candidates. Maximal degree in co-relation 5307. Up to 639 conditions per place. [2024-06-28 00:28:06,779 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 57 selfloop transitions, 31 changer transitions 13/109 dead transitions. [2024-06-28 00:28:06,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 109 transitions, 1664 flow [2024-06-28 00:28:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 00:28:06,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-28 00:28:06,780 INFO L175 Difference]: Start difference. First operand has 181 places, 96 transitions, 1434 flow. Second operand 7 states and 131 transitions. [2024-06-28 00:28:06,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 109 transitions, 1664 flow [2024-06-28 00:28:06,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 109 transitions, 1461 flow, removed 16 selfloop flow, removed 28 redundant places. [2024-06-28 00:28:06,820 INFO L231 Difference]: Finished difference. Result has 149 places, 85 transitions, 1162 flow [2024-06-28 00:28:06,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1162, PETRI_PLACES=149, PETRI_TRANSITIONS=85} [2024-06-28 00:28:06,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-28 00:28:06,820 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 85 transitions, 1162 flow [2024-06-28 00:28:06,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:06,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:06,821 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] [2024-06-28 00:28:06,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 00:28:06,821 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:06,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:06,821 INFO L85 PathProgramCache]: Analyzing trace with hash 331165830, now seen corresponding path program 3 times [2024-06-28 00:28:06,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:06,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428744724] [2024-06-28 00:28:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:07,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:07,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428744724] [2024-06-28 00:28:07,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428744724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:07,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:07,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:28:07,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476072612] [2024-06-28 00:28:07,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:07,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:28:07,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:28:07,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:28:07,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:07,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 85 transitions, 1162 flow. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:07,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:07,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:07,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:07,458 INFO L124 PetriNetUnfolderBase]: 452/954 cut-off events. [2024-06-28 00:28:07,458 INFO L125 PetriNetUnfolderBase]: For 15113/15113 co-relation queries the response was YES. [2024-06-28 00:28:07,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4612 conditions, 954 events. 452/954 cut-off events. For 15113/15113 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6009 event pairs, 188 based on Foata normal form. 4/934 useless extension candidates. Maximal degree in co-relation 4552. Up to 344 conditions per place. [2024-06-28 00:28:07,463 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 71 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-28 00:28:07,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 99 transitions, 1438 flow [2024-06-28 00:28:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:07,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-28 00:28:07,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-28 00:28:07,464 INFO L175 Difference]: Start difference. First operand has 149 places, 85 transitions, 1162 flow. Second operand 7 states and 122 transitions. [2024-06-28 00:28:07,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 99 transitions, 1438 flow [2024-06-28 00:28:07,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 99 transitions, 1281 flow, removed 12 selfloop flow, removed 19 redundant places. [2024-06-28 00:28:07,483 INFO L231 Difference]: Finished difference. Result has 132 places, 87 transitions, 1087 flow [2024-06-28 00:28:07,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1087, PETRI_PLACES=132, PETRI_TRANSITIONS=87} [2024-06-28 00:28:07,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-28 00:28:07,483 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 87 transitions, 1087 flow [2024-06-28 00:28:07,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:07,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:07,483 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] [2024-06-28 00:28:07,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 00:28:07,483 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:07,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:07,484 INFO L85 PathProgramCache]: Analyzing trace with hash -238639732, now seen corresponding path program 4 times [2024-06-28 00:28:07,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:07,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198818433] [2024-06-28 00:28:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:07,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:07,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:07,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198818433] [2024-06-28 00:28:07,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198818433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:07,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:07,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 00:28:07,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766808128] [2024-06-28 00:28:07,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:07,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 00:28:07,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:07,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 00:28:07,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 00:28:07,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:07,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 87 transitions, 1087 flow. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:07,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:07,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:07,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:08,182 INFO L124 PetriNetUnfolderBase]: 444/928 cut-off events. [2024-06-28 00:28:08,183 INFO L125 PetriNetUnfolderBase]: For 10300/10300 co-relation queries the response was YES. [2024-06-28 00:28:08,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4165 conditions, 928 events. 444/928 cut-off events. For 10300/10300 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5649 event pairs, 192 based on Foata normal form. 4/918 useless extension candidates. Maximal degree in co-relation 4112. Up to 531 conditions per place. [2024-06-28 00:28:08,187 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 64 selfloop transitions, 27 changer transitions 0/99 dead transitions. [2024-06-28 00:28:08,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 99 transitions, 1303 flow [2024-06-28 00:28:08,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 00:28:08,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-28 00:28:08,187 INFO L175 Difference]: Start difference. First operand has 132 places, 87 transitions, 1087 flow. Second operand 7 states and 120 transitions. [2024-06-28 00:28:08,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 99 transitions, 1303 flow [2024-06-28 00:28:08,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 99 transitions, 1254 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 00:28:08,203 INFO L231 Difference]: Finished difference. Result has 135 places, 88 transitions, 1121 flow [2024-06-28 00:28:08,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1121, PETRI_PLACES=135, PETRI_TRANSITIONS=88} [2024-06-28 00:28:08,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-28 00:28:08,203 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 88 transitions, 1121 flow [2024-06-28 00:28:08,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 9 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:08,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:08,203 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] [2024-06-28 00:28:08,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 00:28:08,204 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:08,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1434749742, now seen corresponding path program 6 times [2024-06-28 00:28:08,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:08,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367644831] [2024-06-28 00:28:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:08,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:08,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367644831] [2024-06-28 00:28:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367644831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:08,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:08,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:28:08,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182886767] [2024-06-28 00:28:08,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:08,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:28:08,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:08,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:28:08,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:28:08,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:08,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 88 transitions, 1121 flow. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:08,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:08,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:08,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:08,766 INFO L124 PetriNetUnfolderBase]: 512/1108 cut-off events. [2024-06-28 00:28:08,766 INFO L125 PetriNetUnfolderBase]: For 12344/12344 co-relation queries the response was YES. [2024-06-28 00:28:08,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4688 conditions, 1108 events. 512/1108 cut-off events. For 12344/12344 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7401 event pairs, 190 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 4634. Up to 348 conditions per place. [2024-06-28 00:28:08,772 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 74 selfloop transitions, 19 changer transitions 3/104 dead transitions. [2024-06-28 00:28:08,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 104 transitions, 1410 flow [2024-06-28 00:28:08,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 00:28:08,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-28 00:28:08,773 INFO L175 Difference]: Start difference. First operand has 135 places, 88 transitions, 1121 flow. Second operand 7 states and 124 transitions. [2024-06-28 00:28:08,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 104 transitions, 1410 flow [2024-06-28 00:28:08,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 104 transitions, 1294 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 00:28:08,791 INFO L231 Difference]: Finished difference. Result has 135 places, 89 transitions, 1059 flow [2024-06-28 00:28:08,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1059, PETRI_PLACES=135, PETRI_TRANSITIONS=89} [2024-06-28 00:28:08,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-28 00:28:08,791 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 89 transitions, 1059 flow [2024-06-28 00:28:08,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:08,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:08,792 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] [2024-06-28 00:28:08,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 00:28:08,792 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:08,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash -238639918, now seen corresponding path program 7 times [2024-06-28 00:28:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:08,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639501694] [2024-06-28 00:28:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:09,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:09,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639501694] [2024-06-28 00:28:09,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639501694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:09,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:09,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:28:09,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757818955] [2024-06-28 00:28:09,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:09,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:28:09,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:28:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:28:09,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:09,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 89 transitions, 1059 flow. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:09,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:09,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:09,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:09,360 INFO L124 PetriNetUnfolderBase]: 528/1142 cut-off events. [2024-06-28 00:28:09,360 INFO L125 PetriNetUnfolderBase]: For 11996/11996 co-relation queries the response was YES. [2024-06-28 00:28:09,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4461 conditions, 1142 events. 528/1142 cut-off events. For 11996/11996 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7624 event pairs, 150 based on Foata normal form. 12/1134 useless extension candidates. Maximal degree in co-relation 4408. Up to 451 conditions per place. [2024-06-28 00:28:09,365 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 65 selfloop transitions, 26 changer transitions 6/105 dead transitions. [2024-06-28 00:28:09,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 105 transitions, 1317 flow [2024-06-28 00:28:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:09,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 00:28:09,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 00:28:09,366 INFO L175 Difference]: Start difference. First operand has 135 places, 89 transitions, 1059 flow. Second operand 7 states and 123 transitions. [2024-06-28 00:28:09,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 105 transitions, 1317 flow [2024-06-28 00:28:09,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 105 transitions, 1239 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 00:28:09,383 INFO L231 Difference]: Finished difference. Result has 137 places, 88 transitions, 1033 flow [2024-06-28 00:28:09,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1033, PETRI_PLACES=137, PETRI_TRANSITIONS=88} [2024-06-28 00:28:09,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-28 00:28:09,384 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 88 transitions, 1033 flow [2024-06-28 00:28:09,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:09,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:09,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:09,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 00:28:09,384 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:09,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:09,384 INFO L85 PathProgramCache]: Analyzing trace with hash 746317551, now seen corresponding path program 1 times [2024-06-28 00:28:09,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:09,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929574041] [2024-06-28 00:28:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:09,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:09,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:09,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929574041] [2024-06-28 00:28:09,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929574041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:09,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:09,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 00:28:09,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323479741] [2024-06-28 00:28:09,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:09,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 00:28:09,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 00:28:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 00:28:09,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:09,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 88 transitions, 1033 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:09,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:09,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:09,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:10,171 INFO L124 PetriNetUnfolderBase]: 340/740 cut-off events. [2024-06-28 00:28:10,172 INFO L125 PetriNetUnfolderBase]: For 8471/8471 co-relation queries the response was YES. [2024-06-28 00:28:10,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2956 conditions, 740 events. 340/740 cut-off events. For 8471/8471 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4374 event pairs, 122 based on Foata normal form. 16/734 useless extension candidates. Maximal degree in co-relation 2902. Up to 298 conditions per place. [2024-06-28 00:28:10,175 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 41 selfloop transitions, 6 changer transitions 41/96 dead transitions. [2024-06-28 00:28:10,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 96 transitions, 1225 flow [2024-06-28 00:28:10,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 00:28:10,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 00:28:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-28 00:28:10,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-28 00:28:10,175 INFO L175 Difference]: Start difference. First operand has 137 places, 88 transitions, 1033 flow. Second operand 5 states and 94 transitions. [2024-06-28 00:28:10,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 96 transitions, 1225 flow [2024-06-28 00:28:10,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 96 transitions, 1090 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-28 00:28:10,187 INFO L231 Difference]: Finished difference. Result has 134 places, 51 transitions, 462 flow [2024-06-28 00:28:10,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=462, PETRI_PLACES=134, PETRI_TRANSITIONS=51} [2024-06-28 00:28:10,188 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-28 00:28:10,188 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 51 transitions, 462 flow [2024-06-28 00:28:10,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:10,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:10,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:10,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 00:28:10,188 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:10,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1420173109, now seen corresponding path program 2 times [2024-06-28 00:28:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:10,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989648154] [2024-06-28 00:28:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:10,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:10,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:10,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989648154] [2024-06-28 00:28:10,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989648154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:10,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:10,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:10,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118961608] [2024-06-28 00:28:10,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:10,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:10,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:10,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:10,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:10,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:10,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 51 transitions, 462 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:10,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:10,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:10,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:11,088 INFO L124 PetriNetUnfolderBase]: 202/445 cut-off events. [2024-06-28 00:28:11,088 INFO L125 PetriNetUnfolderBase]: For 4776/4776 co-relation queries the response was YES. [2024-06-28 00:28:11,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1563 conditions, 445 events. 202/445 cut-off events. For 4776/4776 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2424 event pairs, 61 based on Foata normal form. 8/439 useless extension candidates. Maximal degree in co-relation 1523. Up to 184 conditions per place. [2024-06-28 00:28:11,090 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 27 selfloop transitions, 3 changer transitions 22/60 dead transitions. [2024-06-28 00:28:11,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 60 transitions, 584 flow [2024-06-28 00:28:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:11,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 00:28:11,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-28 00:28:11,091 INFO L175 Difference]: Start difference. First operand has 134 places, 51 transitions, 462 flow. Second operand 7 states and 115 transitions. [2024-06-28 00:28:11,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 60 transitions, 584 flow [2024-06-28 00:28:11,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 60 transitions, 404 flow, removed 11 selfloop flow, removed 44 redundant places. [2024-06-28 00:28:11,095 INFO L231 Difference]: Finished difference. Result has 78 places, 36 transitions, 178 flow [2024-06-28 00:28:11,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=178, PETRI_PLACES=78, PETRI_TRANSITIONS=36} [2024-06-28 00:28:11,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-28 00:28:11,095 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 36 transitions, 178 flow [2024-06-28 00:28:11,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:11,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 00:28:11,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:11,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 00:28:11,096 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 00:28:11,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 00:28:11,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1527567197, now seen corresponding path program 3 times [2024-06-28 00:28:11,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 00:28:11,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526309802] [2024-06-28 00:28:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 00:28:11,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 00:28:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 00:28:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 00:28:11,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 00:28:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526309802] [2024-06-28 00:28:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526309802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 00:28:11,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 00:28:11,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 00:28:11,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465404354] [2024-06-28 00:28:11,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 00:28:11,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 00:28:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 00:28:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 00:28:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-28 00:28:11,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-28 00:28:11,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 36 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:11,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 00:28:11,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-28 00:28:11,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 00:28:11,925 INFO L124 PetriNetUnfolderBase]: 90/213 cut-off events. [2024-06-28 00:28:11,925 INFO L125 PetriNetUnfolderBase]: For 758/758 co-relation queries the response was YES. [2024-06-28 00:28:11,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 213 events. 90/213 cut-off events. For 758/758 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 894 event pairs, 17 based on Foata normal form. 8/213 useless extension candidates. Maximal degree in co-relation 539. Up to 134 conditions per place. [2024-06-28 00:28:11,926 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 0 selfloop transitions, 0 changer transitions 41/41 dead transitions. [2024-06-28 00:28:11,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 41 transitions, 228 flow [2024-06-28 00:28:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 00:28:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 00:28:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 00:28:11,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-28 00:28:11,926 INFO L175 Difference]: Start difference. First operand has 78 places, 36 transitions, 178 flow. Second operand 7 states and 107 transitions. [2024-06-28 00:28:11,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 41 transitions, 228 flow [2024-06-28 00:28:11,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 41 transitions, 193 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-28 00:28:11,927 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2024-06-28 00:28:11,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2024-06-28 00:28:11,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-28 00:28:11,927 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2024-06-28 00:28:11,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.9) internal successors, (129), 10 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 00:28:11,929 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-28 00:28:11,930 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-28 00:28:11,930 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-28 00:28:11,930 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-28 00:28:11,930 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-28 00:28:11,930 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-28 00:28:11,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 00:28:11,930 INFO L445 BasicCegarLoop]: Path program histogram: [10, 9, 8, 7, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 00:28:11,932 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-28 00:28:11,932 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-28 00:28:11,935 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-28 00:28:11,935 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-28 00:28:11,936 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.06 12:28:11 BasicIcfg [2024-06-28 00:28:11,936 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-28 00:28:11,936 INFO L158 Benchmark]: Toolchain (without parser) took 54453.18ms. Allocated memory was 165.7MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 125.5MB in the beginning and 907.8MB in the end (delta: -782.2MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2024-06-28 00:28:11,936 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 121.6MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:28:11,937 INFO L158 Benchmark]: Witness Parser took 0.15ms. Allocated memory is still 165.7MB. Free memory is still 128.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-28 00:28:11,937 INFO L158 Benchmark]: CACSL2BoogieTranslator took 598.45ms. Allocated memory is still 165.7MB. Free memory was 125.5MB in the beginning and 95.5MB in the end (delta: 30.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-28 00:28:11,937 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.69ms. Allocated memory is still 165.7MB. Free memory was 95.5MB in the beginning and 92.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-28 00:28:11,937 INFO L158 Benchmark]: Boogie Preprocessor took 63.42ms. Allocated memory is still 165.7MB. Free memory was 92.7MB in the beginning and 88.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-28 00:28:11,937 INFO L158 Benchmark]: RCFGBuilder took 750.46ms. Allocated memory is still 165.7MB. Free memory was 88.5MB in the beginning and 84.5MB in the end (delta: 4.0MB). Peak memory consumption was 48.5MB. Max. memory is 16.1GB. [2024-06-28 00:28:11,938 INFO L158 Benchmark]: TraceAbstraction took 52963.12ms. Allocated memory was 165.7MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 83.6MB in the beginning and 907.8MB in the end (delta: -824.1MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. [2024-06-28 00:28:11,939 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 121.6MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.15ms. Allocated memory is still 165.7MB. Free memory is still 128.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 598.45ms. Allocated memory is still 165.7MB. Free memory was 125.5MB in the beginning and 95.5MB in the end (delta: 30.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.69ms. Allocated memory is still 165.7MB. Free memory was 95.5MB in the beginning and 92.7MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 63.42ms. Allocated memory is still 165.7MB. Free memory was 92.7MB in the beginning and 88.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 750.46ms. Allocated memory is still 165.7MB. Free memory was 88.5MB in the beginning and 84.5MB in the end (delta: 4.0MB). Peak memory consumption was 48.5MB. Max. memory is 16.1GB. * TraceAbstraction took 52963.12ms. Allocated memory was 165.7MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 83.6MB in the beginning and 907.8MB in the end (delta: -824.1MB). Peak memory consumption was 1.2GB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 852]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 854]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 855]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 65 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 52.9s, OverallIterations: 68, TraceHistogramMax: 1, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 33.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2828 SdHoareTripleChecker+Valid, 7.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2731 mSDsluCounter, 475 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 313 mSDsCounter, 756 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10607 IncrementalHoareTripleChecker+Invalid, 11363 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 756 mSolverCounterUnsat, 162 mSDtfsCounter, 10607 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 541 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 538 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4875occurred in iteration=52, InterpolantAutomatonStates: 457, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 18.5s InterpolantComputationTime, 1327 NumberOfCodeBlocks, 1327 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 1259 ConstructedInterpolants, 0 QuantifiedInterpolants, 22178 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 68 InterpolantComputations, 68 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-28 00:28:11,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE